Re: [time-nuts] GPS ANTENNA
On Sat, 31 Mar 2018 10:58:19 -0500, donandarline-Re5JQEeQqe8AvxtiuMwx3w wrote: > I found a supplier for high quality GPS antennas at a very reasonable > price. PCTEL GPSL1-TMG-SPI-40NCB. *** SNIP *** I had one of those on 25m cable, and it worked fine on a Tbolt , until i got an active antenna splitter that also had some gain. Then i had to replace it w. a 26dB version of same type, else the "Jackson Lite" was loosing sync. What i mean here, is that you can get too much gain too. Btw: Good price. CFO Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Linux-gpib & Agilent usb-gpib , fixed on a RaspberryPi w. kernel 4.x.x
Just wanted to inform you that the linux-gpib maintainer Dave Penkler. Has fixed the problem with the Agilent 82357B GPIB USB adapter, that have been present since the switch to kernel 4.x.x. *** Snip *** Turned out to be non dma compatible buffers. SVN R1654 fixes it. Please let me know if it works for you. thanks, -Dave *** Sip *** Also: We're building a RasPi based logging platform for VoltNuts for now @ http://www.eevblog.com/forum/metrology/raspberry-pi23-logging-platform-for-voltnuts/ CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 53132 replacement fan
On Sun, 20 Nov 2016 14:14:02 -0500, John Ackermann N8UR wrote: > Does anyone have a part number for the 53132 fan (or equivalent)? Mine > is getting pretty noisy. > > Thanks! > John I got this one for my '132 http://www.ebay.com/itm/111317257709 Sunon HA40201V4-999 Axial-Lüfter 40x40x20mm 12V= 9m³/h von Sunon Haven't mounted it yet though. /CFO -- E-mail:xne...@luna.dyndns.dk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] GPS antenna selection
On Thu, 04 Aug 2016 23:29:06 +0200, Herbert Poetzl wrote: > Dear fellow time-nuts! > > I'm currently investigating my options regarding GPS antennae (of course > for time related purposes) > and I'm really confused by the variety they come in ... (my apologies in > advance for the long post). > > > Setting: > > I'm living in a three storey house with a sloped roof, a covered balcony > and a larger garden with huge trees on the Austrian countryside > (Europe). I'm using this type (26dB, N Connector) on my balcony (South). It's mounted on a 1m waterpipe, that is "stripped" to the balcony fence. I initially bought a 40dB , but had to change to 26dB , due to too much gain. www.ebay.com/itm/PCTEL-GPS-TMG-26N-26-dB-Internal-Amplifier-Timing- Reference-Antenna-/232037804675 www.ebay.com/itm/Lucent-Datum-KS24019L112C-GPS-26dB-5V-Antenna-Telecom- Timing-N-Conn-Andrews-NEW-/361510967153 I use a Tbolt, that have 75ohm impedance , and am using about 25m quad shielded 75 ohm , quality sattelite cable from the balcony to the Tbolt. I'm using a N-->F adapter at the antenna end, that makes it super easy to make a diy F-->F connector cable. I now have installed a quad active antenna splitter (50ohm) , using the same 75ohm cable , and a F-->N adapter at the splitter end. And see no noticable problems using 75ohm cable there. CFO Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Using the HP 58503a to correct your PC clock
On Thu, 04 Aug 2016 17:24:31 +, Mark Sims wrote: > Probably the best way for most people to keep their clock accurate is to > use something like NTP Doesn't Meinberg have a Win7 version of ntp on their homepage ? Why not use that CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Seek manual for a STARLOC II GPSDO
Group My Google-Fu has failed me, while locating a manual for a Symmetricom Starloc II , not the Starloc II Plus. If anyone has the manual, and would be kind enough to mail it to me. Id' be grateful, e-mail size is no problem. TIA CFO Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] New (old) 53132A - Time Interval Delay Arming - question
Gents i just got a 53132A - Opt 010 Serial : 3404A00xxx Fw Rev : 3403 An old lady w. a 10811 OCXO in it - HP 1994 Unit - Nice bright display. I noticed in the Prog. manual (pg 17) that this applies to my counter : * Snip * Agilent 53132A Time Interval Delay Arming - Agilent 53131A and Agilent 53132A Counters with a serial number prefix below 3646 are identical in their TI arming modes. Both only offer Time Interval Delay, where the STOP trigger of a time interval measurement can be delayed by a user-specified time. * Snip * What am i missing ?? , or what has been added in later hw revs ? The rest of the "Differences" does not seem to apply , as i have Fw Rev: 3403 , not 3402 or earlier. Upgrading fw: I have access to the 2010 fw proms - 4613 0738 But can i update my "old counter" ? I seem to loose my Cal , and i can only do the "simple" TI cal @home. So i'm not sure i want to do that, if i have to send it to a shop for Cal. TIA CFO - Denmark -- E-mail:xne...@luna.dyndns.dk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Simple solution for disciplining OCXO with 1 PPS
On Sun, 22 May 2016 19:41:25 +0200, Bernd Neubig wrote:
> Hello Fellow time-nuts,
> I am looking for a simple solution to discipline my 10 MHz reference
> OCXO in my private lab with an 1 PPS signal from a separate GPS
> receiver.
There seems to be some TU60 D102 on *bay search for #: 131819953988
CFO
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Re: [time-nuts] Simple solution for disciplining OCXO with 1 PPS
On Sun, 22 May 2016 19:41:25 +0200, Bernd Neubig wrote: > Hello Fellow time-nuts, > I am looking for a simple solution to discipline my 10 MHz reference > OCXO in my private lab with an 1 PPS signal from a separate GPS > receiver. > I am curious if there is a solution possible without programming a > microcontroller, as I am an old-fashioned "analogue" guy ;) > I am well aware, that such a solution would have a lot of disadvantages, > as it cannot effectively compensate for short-term variations. However I > would be happy if such a KISS solution could achieve a stability (STS) > of better 1E-10 over an hour. I know this is a damned long integration > time for an analogue integrator... > If that sounds too weird, I am open to receive advises for a > microcontroller based solution. > Bernd - Get a gps with 10Khz or more out , i think the 10Khz jupiters are "gone" , but a LEA5-T or LEA6-T could output ie. 1Mhz , the divide the OCXO by 10 and phaselock the 2. Use "millers" XOR http://www.jrmiller.demon.co.uk/projects/ministd/frqstd0.htm Or this one using a 4046 http://gpsdo.i2phd.com/ Pure "Analog" CFO Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Need info on a Vectron Model : 233-8346 OCXO
Gents I have just gotten 2 Vectron model 233-8346 OCXO's , a 10Mhz & a 100Mhz. They have 2 pins & the case (moght be a 3'rd) , and a BNC for F-Out. I have absolutely no info of these ,and have spent a lot of time searching on the "net". Can anyone help me with some info (datasheet) on this model ? TIA CFO Denmark -- E-mail:xne...@luna.dyndns.dk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] MV89A / MTI-260 / HP10811 carrier board
On 2016-02-26 23:57, Tom Van Baak wrote: > Gerhard Hoffmann wrote: >> I have never used PICs and given their life cycle it's a bad time to jump on >> the train. >> Not now when I'm just converting everything to ARM. > Hi Gerhard, > > The 12F-series that I use for the PIC dividers is very solid. These are sold > by the billions. Not sure what train you're talking about. Don't confuse ARM > and x86 chips du jour with something like an 8-pin 8-bit PIC. For more info > on the PIC dividers see: > http://leapsecond.com/pic/picdiv.htm > http://leapsecond.com/pic/picdiv-list.htm > > Thanks for posting the sample Xilinx code. That's intriguing. So if I started > from scratch, what does it take to turn your firmware source code into a > working chip? Are any of the chips as small or as cheap as a SMT or DIP PIC? Hi Tom / Gerhard / Magnus et all. I have been using Altera parts, primarily because the finished boards on *bay are so cheap. I'm still a beginner in VHDL , but can do a little I have both Xilinx ISE & Altera Quartus installed on my linux mint 17 (x64) , and both works ok. With a few install quirks. VHDL is quite the same for both , and only the timing constraint magic is different. Gerhard would'nt a 240 MC 7$ cpld board , or a small 14$ FPGA be a nice base for some of your timing magic ? 240 MC CPLD http://www.ebay.com/itm/1PCS-NEW-EPM240-Altera-MAX-II-CPLD-Development-Board-/272086159418 http://www.ebay.com/itm/Altera-MAX-II-EPM240-CPLD-Development-Board-Experiment-Board-Learning-Breadboard-/181436966398 Small fpga http://www.ebay.com/itm/1PCS-Altera-CycloneII-EP2C5T144-FPGA-Mini-Development-Board-/272086171657 Altera usb programmer (Jtag) http://www.ebay.com/itm/Altera-Mini-Usb-Blaster-Cable-For-CPLD-FPGA-NIOS-JTAG-Altera-Programmer-/272097471982 Rgds CFO - Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Generating a solid PPS from 10Mhz source
On Wed, 13 Jan 2016 09:22:09 +, Jerome Blaha wrote: > Is there an easy circuit to build that can consistently deliver a 1 PPS > from a 10MHz source with excellent resolution and repeatability? Ulrich B. has made an AVR 1PPS, for those that uses AVR's instead of PIC's AVR PPSDIV 2008-09-06 - in bottom of page. http://www.ulrich-bangert.de/html/downloads.html The Mega8 version should be easy to port to an Arduino clone CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] New Member / Z3801
On Sun, 17 Jan 2016 09:59:22 -0500, Artek Manuals wrote: > Finally I am sure that the above have been addressed on older posts, but > I gave up searching in frustration. Is there an easy way to search the > ENTIRE list archive. It seems that the archives must be queried one > month at time which is REALLY TEDIOUS > > Dave NR1DX ArtekManuals.com I use this url for searching they mirror time-nuts : https://www.mail-archive.com/time-nuts@febo.com/info.html I also have a Z3801 w. a 1996 date, and think i saw that you should manually set the date before it gets a GPS fix. Then it will remember it (until next reboot) CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Generating a solid PPS from 10Mhz source
On Wed, 13 Jan 2016 14:31:25 +0100, Ole Petter Ronningen wrote: > Sounds like a PICDIV is just about right: > http://www.leapsecond.com/pic/picdiv.htm > Ulrich B made an AVRDIV, for those who use AVR's (bottom of page) http://www.ulrich-bangert.de/html/downloads.html /CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 3GHz prescaler for Pendulum counters
On Wed, 14 Oct 2015 17:36:01 -0400, GandalfG8--- via time-nuts wrote: > that they > also work with the PM6680, I mounted a 3GHz prescaler in my PM6680B a month ago. And the only thing Pavel told me to be carefull off. Was that Vmax was 5v. as opposed to the original that was 12v i think. He also mentioned that the board prob. would go to 3.5GHz I tried it out with my Agilent E4432B that max out @3GHz , and it worked excellent. CFO Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] FE-5680B Rubidium and DDS
On Sat, 26 Sep 2015 07:36:30 +0100, Clint Jay wrote: *** SNIP > so it may be > possible to modify the B version Bryan and I have. *** SNIP Someone just published a 10Mhz writeup on eevblog http://www.eevblog.com/forum/testgear/fe-5680b-1pps-to-10mhz/30/? action=post;quote=767280;last_msg=767313 http://andrelubbock.blogspot.co.nz/2015/09/rubidium-frequency- standard.html CFO Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] teensy as time capture device
On Thu, 24 Sep 2015 05:30:35 -0700, Jim Lux wrote: > > What would be interesting is if there's a pin on the Arduino/Teensy that > you could feed a high quality oscillator to, and then do counting with > that. The K20 microcontroller has a mindbendingly large number of > features and alternate pin functions. As i see it, from the DS. , it seems like there are 2 options. External Oscillator (the system clock clock) , or External Timer clock (limited to system clock/4) Electr. specs https://www.pjrc.com/teensy/K20P64M72SF1.pdf Family Ref https://www.pjrc.com/teensy/K20P64M72SF1RM.pdf Seems like the EXTAL pin (main oscillator) accepts an Oscillator signal (max VDD + 0.3v) (Electr specs pg.10) Ext Osc Connection (Family ref. pg. 526) Also see PLL jitter (Electr specs pg.27 table 14) There is a possibility to clock the FlexTimerModule by an external clock (FTM_CLKIN/EXCLK - Max freq is Mainclock/4) , see (Family Ref. pg. 113, 214 & 774) If using EXTAL and USB , you want to make sure that the USB part still gets it's 48Mhz (via the PLL mul/div). Maybe divide 10Mhz (XTAL) by 2 , and mul by 48, in the PLL. Rgds CFO - Denmark -- E-mail:xne...@luna.dyndns.dk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] LAN/USB to GP-IB/HP-IP Adapters
On Fri, 11 Sep 2015 18:10:40 -0400, Jim Sanford wrote: > Just ordered Ethernet to GPIB from Prologix.biz for $199. They also > have a USB version, which a good friend has and recommends. (Which is > why I bought the ethernet device.) > Can you share info on labview home and your apps? I don't think that the prologic has VISA drivers available, and VISA is a pre. req. for getting labview to work. For Lan : an Agilent Keysight E5810A (or B) LAN/GPIB Gateway , *bay 331649591960 Should work under windows (using the Agilent IOsuite drivers) , i haven't tested though. I'm on linux. Drivers http://www.keysight.com/main/software.jspx? cc=DK=dan=2175637=-32390.536881830=2175637 Bundle http://www.keysight.com/main/software.jspx? ckey=1184883=dan=DK=-32390.536881830=1184883 Again no Linux support due to Agilents "Windows only support" I know that ICS ie. *bay 351507029911 Makes some Agilent compatible Lan-GPIB boxes , but can't remember the excact model numbers. The NI LAN-GPIB boxes *bay 221878176044 , should also be considered , and AFAIK the only choice for labview under linux. Make sure the adapter you get, still have labview support , and that the drivers are available (downloadable). CFO Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] FE-5680A pin 6?
On Thu, 10 Sep 2015 18:06:23 -0700, Nick Sayer via time-nuts wrote: > What I wonder about is pin 6 on the connector. Google results seem to > indicate that that’s supposed to be a PPS output, but what I get on it > is a fixed -5v or so. Anybody know what this signal is supposed to be? AFAIK The "Lock" pin is loading the 1PPS pin , meaning if you have a LED on the "Lock" you should buffer it, else there will be no 1PPS. But -5v doesn't seem right. -- E-mail:xne...@luna.dyndns.dk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] LAN/USB to GP-IB/HP-IP Adapters
On Thu, 10 Sep 2015 14:58:41 -0700, Brooke Clarke wrote: >so I'm looking for an adapter that runs > from LAN or a USB port. > > Can anyone comment on what's available? > Hi Brooke Afaik the Agilent USB GPIB adapter can "Speak VISA on Windows" with Agilents windows driver. But no VISA support for Agilents under Linux, as Agilent doesn't make drivers for linux :-( See this Agilent PDF http://cp.literature.agilent.com/litweb/pdf/5990-3731EN.pdf?cmpid=1273CN And have a look on *bay for : "Agilent 82357B USB-GPIB Interface" According to this thread , even the "real ones" are clones (work ok) http://www.eevblog.com/forum/testgear/flood-of-new-agilent-82357b-gpib- usb-adaptors-on-ebay-the-real-deal/ I have a Beiming and an Agilent (prob a clone) , both works fine with liunx-gpib. CFO Denmark -- E-mail:xne...@luna.dyndns.dk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Cisco Nexus switches and the leap second
On Fri, 26 Jun 2015 19:40:02 +, Ryan Stasel wrote: All, Anyway, just figured it might be of interest to those on this list that are also involved in data Networking (or just find it interesting). -Ryan Stasel Thanx Ryan You just saved my a.. on 4 of my Nexus 5K's CFO Denmark -- E-mail:xne...@luna.dyndns.dk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Using CPLD/FPGA or similar for frequency divider
On Mon, 08 Jun 2015 16:27:26 +0100, David C. Partridge wrote: I'm up for either ... My thoughts are to try it out on a development board and if it works, maybe build a few for possible sale, and also release Gerbers and VHDL files. Regards, David Partridge I have these cheap cards , that might be a nice start. CPLD Altera EPM240 (make sure you get the blue board) Ebay: 271520142479 Fpga (2 onboard PLL's) older Cyclone2 , but prob ok. Ebay: 400630255386 Programmer: Ebay: 200943750380 If they could be the heart of the system, then everybody could get started cheap. I'm using Quartus2 on Linux (Mint17) , works ok. But Modelsim needs some extra libs to function. CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Using CPLD/FPGA or similar for frequency divider
On Sun, 07 Jun 2015 11:23:40 +0100, David C. Partridge wrote: My reading so far of what's been said in this thread is that you might get good results using a CPLD/FPGA as a divider but ... . .. .. .. Thanks again Dave Is this going to be an open source project, or something you buy ? CFO -- E-mail:xne...@luna.dyndns.dk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Distributiuon Amlifier Altinex DA1804NT
On Thu, 28 May 2015 14:09:36 -0400, Vlad wrote: I am not sure what to blame. ;-) I'm using a TB on a 350Mhz video amplifier 6xRGB , and discovered that the Video DistAmp was clipping the 10Mhz from the TB. I used a 10dB attenuator on the TB signal (6dB would have been better) , but i had a 10dB in the drawer. Watch out for putting a too high signal into a 1V-PP Video Dist Amp. CFO Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Modern HW replacement for ATOM based NTP server?
On Tue, 07 Apr 2015 13:58:00 -0700, Hal Murray wrote: You can get no-fan style power for Mini-ITX size systems. The ones I'm familiar with have a tiny DC-DC converter that mounts on the big power connector and runs off a laptop size external supply. http://www.mini-box.com/DC-DC I use some of the Wide-Input ATX (Red-ATX plug) supplies from them , they run excellent. Takes up no space , and are totally silent. I'd recommend the WI model , as you can use a spare laptop-psu or whatever you have lying around. CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Modern HW replacement for ATOM based NTP server?
On Mon, 06 Apr 2015 22:29:23 +, Frank Hughes via time-nuts wrote: Hi,Years ago this forum helped me put together my first GPSDO and NTP server. Using a then-popular INTEL ATOM board, FreeBSD w/ the NTP kernel, 1PPS input from aTB, works great. But as the years go by, HW improves/evolves and it might be time to recreate this functionin some other modern HW. What about the Odroid C1 ? http://tinyurl.com/qd7m4cz Quadcore Armv5 Price as a RasPI Gigabit Enet - Not usb connected CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Ordered a 3GHz prescalerboard for my PM6680B
I just noticed that the Polish guy, making the 3GHz prescalers for the Agilent 53131/132's. Got an excellent review here (for the pcb etc) https://www.youtube.com/watch?v=21_9Dspzu_w Now he's made a 3Ghz prescalerboard for the PM6680/85. So i had to get one , *bay: 111612684288 Will let you know the outcome. CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Measuring on my Racal 9480 with OCXO 40 10Mhz outputs - (8x 5 chan)
Guyzz , i just got my Racal 9480 with OCXO 40 10Mhz outputs And decided to play around with my PM6680B and linux-gpib. I'm using gmane to post , so i can't do attachments. But i have uploaded the results here: Url on eevblog : http://tinyurl.com/pdcc9ey I'm doing 10 measurements w. 1 s gate. And have enabled stats on the 6680B, for each 10 reading blocks. I'm reading out logging F-max,min,mean and sdev What else cold be fun ?? CFO -- E-mail:xne...@luna.dyndns.dk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] The HP 58503A
On Fri, 20 Mar 2015 15:27:22 +, R.Phillips wrote: Gentlemen I have recently acquired an HP 58503A which is working perfectly, Was it the UK one going quite cheap ? The seller didn't answer me if he would ship outside UK, so i had to let it go. Congrats w. a nice instrument CFO -- E-mail:xne...@luna.dyndns.dk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Seeking Racal 9480 Manuals
Gents I just got a Racal 9480 w. OCXO and 40x10MHz outputs I can't find any user or service manuals for this unit. Can anyone help out here ? I don't even know if the OCXO labeled Frequency Standard 11-7038 is an Opt 04A or 04F. TIA CFO - Denmark -- E-mail:xne...@luna.dyndns.dk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] LTE-Lite and - S14WI 1x4 GPS splitter
Gents I have a S14WI GPS antenna splitter w. Opt : Amplified + DC Bias Select + Ant Current monitor It's connected to a Maxrad 40dB ice cone timing antenna DS for the spliter here http://www.amtechs.co.jp/2_gps/pdf/S14WI_spec.pdf http://tinyurl.com/nfmpyqm Currently i have this connected : Port1 : Tbolt Port2 : Z3810A Port3 : Reserved KS Lucent (Waiting for TNC-BNC adapter) Port4 : Reserved for LTE-Lite (hope to connect today) Port3/4 have a 50ohm (BNC ethernet terminator) on right now As i read the DS , the splitter currently used the antenna power from Port1, to power the antenna, and Port2 is terminated w. 200ohm. I'm a bit unsure about the DS , but as i read it it will isolate Port4 from the antenna DC , as it draws power from Port1 (Tbolt) The LTE-Lite is 3v3 , and wouldn't like to get 5v on it's antenna. If anyone could have a quick glance , and verify my assumptions i'd be gratefull. TIA CFO -Denmark -- E-mail:xne...@luna.dyndns.dk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] LTE-Lite and - S14WI 1x4 GPS splitter
On Sat, 29 Nov 2014 10:54:17 +0100, Björn wrote: Hi! The splitter will not route 5V back out to another splitter port. Your gpsd(tcx)o antenna port is safe. Thanx Hal Björn I have connected it , and it seems to be running fine It has been on for about 1 hr now. $PJLTS,-4.14,-9.10,3870,6,1.7941415,59.8047,9.4E-10,0,8,0x0*55 $PJLTS,-4.30,-9.10,3871,6,1.7941431,59.8047,9.3E-10,0,7,0x0*5C $PJLTS,-4.46,-9.10,3872,6,1.7941451,59.8048,9.3E-10,0,9,0x0*59 Björn do you have the same splitter , i know Magnus does /CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] KS-24361 GPSDO question
On Sun, 09 Nov 2014 12:34:00 -0500, Bob Camp wrote: There are multiple sites that I’m sure would be happy to store a consolidated page (or ten) of information. Didn't Tom ... or was it Brooke post an url to his still empty webpage , and saying he'd start fill in when he got his unit(s) ? Mine is under ways from US CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Divide by five
On Sat, 08 Nov 2014 09:58:36 +0100, Francesco Messineo wrote: can anyone suggest a (cheap if possible) programmer and software for these modern PLD? Thanks and best regards Frank IZ8DWF I'd suggest ALTERA parts , but only because they are the cheapest boards on *bay , XILINX boards are 2 x the Altera price on *Bay. An EPM240 CPLD Board $9 (240 cells let you do quite a lot) http://tinyurl.com/qcusb69 There's also an EPM-570 Board , but the price is almost the same as the below FPGA , and then the FPGA is the thing to get. A CycloneII EP2C5T144 FPGA board (With 2 onbard PLL's) $18 - Super value for the money http://tinyurl.com/pd326ct An ALTERA Programmer $6 http://tinyurl.com/po2qhq2 The only caveat is that they are NOT 5v tolerant , they can do 3v3 or less. ALTERA has the free QuartusII WEB Edition , and it works fine under both Windows Linux (i'm using Mint17 x64 ... Ubuntu 14.04 based under the hood) I am a VHDL beginner , and completed this (free) course s few month back Course http://tinyurl.com/per8lm5 Forum http://tinyurl.com/pw3b9bv I have just did a divide by 5 with the EP2C5T144 FPGA board , using one of the PLL's. I did use so few resources, that it reported 0% of the 4608 Cells utilized, and 1 of 2 PLL's used. *** SNIP * Fitter Status Successful - Sat Nov 8 23:11:59 2014 Quartus II 64-Bit Version 13.0.1 Build 232 06/12/2013 SP 1 SJ Web Edition Revision Name div5pll Top-level Entity Name div5pll Family Cyclone II Device EP2C5T144C8 Timing Models Final Total logic elements0 / 4,608 ( 0 % ) Total combinational functions 0 / 4,608 ( 0 % ) Dedicated logic registers 0 / 4,608 ( 0 % ) Total registers 0 Total pins 6 / 89 ( 7 % ) Total virtual pins 0 Total memory bits 0 / 119,808 ( 0 % ) Embedded Multiplier 9-bit elements 0 / 26 ( 0 % ) Total PLLs 1 / 2 ( 50 % ) *** SNIP * Actually i like Xilinx ISE WebPack better , but the cheap *Bay/Aliexpress boards are ALTERA Boards , so i have both tools installed on my linux machine. If you don't feel like learning VHDL or Verilog , you can do the layout in Schematic. ALTERA QuartusII does have an extensive 74xx lib built in the schematic engine. See my ansver to assignment 10 , for a QuartusII schematic entry of a 50M divider. Using use 4 x HC390 dividers in a divide : 100 / 100 / 100 / 50 configuration. http://tinyurl.com/ntdkcst Be sure to get these versions of the tools , as both have upgraded their tools , and the new tools doesn't support the older (cheaper chips). Altera QuartusII : Version 13.0sp1 (13.1+ doesn't suport the old CPLD's) Xilinx ISE: Version 14.7(Vivado doesn't support the old stuff) I suggest to try it out , you can do a lot of logic in a 240 Cell CPLD , and MUCH more in the FPGA. The 4 x HC390 used 16% of the EPM240 logic , and it is less than 1% in the FPGA. As seen below. *** SNIP *** Flow Status Successful - Sat Nov 8 23:56:46 2014 Quartus II 64-Bit Version 13.0.1 Build 232 06/12/2013 SP 1 SJ Web Edition Revision Name lesson10d Top-level Entity Name lesson10d Family Cyclone II Device EP2C5T144C8 Timing Models Final Total logic elements39 / 4,608 ( 1 % ) Total combinational functions 39 / 4,608 ( 1 % ) Dedicated logic registers 31 / 4,608 ( 1 % ) Total registers 31 Total pins 3 / 89 ( 3 % ) Total virtual pins 0 Total memory bits 0 / 119,808 ( 0 % ) Embedded Multiplier 9-bit elements 0 / 26 ( 0 % ) Total PLLs 0 / 2 ( 0 % ) *** SNIP *** CFO - Denmark -- E-mail:xne...@luna.dyndns.dk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Divide by five
On Sat, 08 Nov 2014 18:17:09 -0500, Bob Camp wrote: Hi I’ve done a lot of designs with Altera parts. They are fine parts, but they are not magic. SNIP The Cyclone 2’s had a minimum rated PLL input of 20(?) MHz. The later parts bumped that down to 10 MHz. Much more TimeNuts compatible. Bob Bob Hmmm ... I didn't know the CycloneII had a Min of 20Mhz. Is that in some doc you can point me to ? Well it seems to be 11Mhz for the CycloneII ... (Bummer from a T-Nut perspective) http://tinyurl.com/opvng2y I just tried to do a 10 = 100Mhz PLL in the EP2C5T144C8 , using the MegaWizzard , and there were no errors or warnings. Strange if the Min input is 11Mhz Anyways , thanx for enlighten me Bob. CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] fast switching quiet synthesizer
On Tue, 07 Oct 2014 17:18:19 -0400, S. Jackson via time-nuts wrote: Hi Anders, in the absence of a true phase noise analyzer the next best thing is to use one of the Agilent 856x analyzers with the phase noise measurement software plug-in. Wouldn't a used E4406A do it , they're going quite cheap ? John Miles says it's quite good , despite it's 10Mhz span. http://tinyurl.com/o7fhwl6 I even think i read he mentioned -140dB somewhere. Ahh: http://tinyurl.com/myg5ra9 I think his site is down atm. , but here is an url for google's cached version. http://tinyurl.com/ppz85qf CFO Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Ignore - testing new email
Ignore - testing new email CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] time-nuts Digest, Vol 121, Issue 65
On Sat, 23 Aug 2014 16:51:06 -0500, Dave M wrote: Thanks for that suggestion, Ed. After a bit of reading in the X72 Reference Guide, it appears that the X72 does have a 1PPS input. That would be considerably easier than trying to interface the Rb into the GPSDO. Still trying to understand what the manual is telling me. Next thing is to determine if my unit has that option enabled (firmware option). That will be a chore for after the holiday... really busy next week. My X72 has firmware 4.xx , and does not support 1PPS. I seem to remember you need v 5.xx I'm quite sure i got it from here (*bay# 180791401271) , and after i complained about the missing 1PPS and told seller the fw. version i had in mine, he wrote the fw. version info on the page. /CFO Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Weather/units question for European members
On Sat, 24 May 2014 01:16:32 +, Mark Sims wrote: Now the question... I would like it to be able to output data in imperial or metric units. In what units is the typical wind speed reported (meters/sec, km/hour, ?). Also air pressure (millibars/hectopascals/pascals/?). Our weather channel is reporting windspeed in meter/sec , and on rare occations km/h. But Second-meter seems to be the standard here in DK CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] OT - Need a German speaker
Are there any German speakers who live in the USA on this list? I need someone to order me a small kit from a German web site. I'll pay you up front to order this for me. http://www.box73.de/product_info.php?products_id=945 It is a speech compressor kit that plugs into the mic of an FT-817. If you can help, please email me offline. Joe Gray W5JG ___ Joe , i'm from Denmark not US , but i can translate a bit. Go here to create an account: https://www.box73.de/create_account.php Vorname = Firstname Nachname = Lastname e-mail widerholen means (repeat) Strasse = street PLZ = Zipcode ORT = City Land = Country Rufzeichen: Callsign ihr password = your password Passwort bestätigen = confirm (repeat) password Warenkorb = Shoppingbasket Zur Kasse = Checkout (To payment) *** The site says the kit is supposed to be deliverable in mid june 2014. Der Bausatz ist voraussichtlich ab Mitte Juni 2014 lieferbar. You can preorder (Vorbestellen) Shipping to US (Versandkosten) , less than 2kg = 5.90 € http://www.box73.de/shop_content.php?coID=14 Payment (Zahlungsarten) is : PayPal , PrePaid or CreditCard http://www.box73.de/shop_content.php?coID=13 Rgds CFO - Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Can (will) a M12+T generate a negative sawtooth message ?
I have 2 x M12+T , and a DS1023-100 Dallas chip. I'm going to use the DS1023 to make sawtooth correction , but the DS is a bit unclear. http://datasheets.maximintegrated.com/en/ds/DS1023.pdf 1: What is the REF output used for ? As i read it it shows the internal delay through the chip. And can be used to subtract that delay if needed. But they also talks about temperature compensation etc. Does one use that signal in the active circuit ? I was thinking about just measuring it once. 2: If the M12+T can/will output negative sawtooth delays , can i just write the byte into the DS1023 , and the sign of the byte will automaticly adjust for positive/negative delay ? Or do i have to add a fixed delay ie. 50ns to the value , in order to be able to make a negative/early pulse of max 50 ns ? I have just found the DS of the 1123 , and it might be a bit clearer i hope. http://datasheets.maximintegrated.com/en/ds/DS1123L.pdf I hope someone here might have practical experience with the DS1023 TIA CFO - Denmark -- e-mail: xne...@luna.dyndns.dk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] I can't get a nice waveform from my rubidium !
On Thu, 17 Apr 2014 06:32:52 +0100, Claude Fender wrote: My unit has two outputs with no options. The problem is the shape of the waveform (see attachments), it's the same shape for the two outputs. When I connect an output directly to the oscilloscope, the shape is nearly squared and when I use a probe, the shape is nearly sine ! According to the pict , the low output is supposed to be a CMOS square Is it called A10-R ? www.technical-sys.com/QL%20A10-R%20DS.pdf But termination would as other say be an issue. Dig into your drawer and pull out a BNC-T , and one of those 50ohm termination resistors you know you saved , when you were running old coax based ehternet on rg-58 cable. Have saved me a few times on my Rigol that hasn't got 50 termination built in. Else use your freq counter as termination , it ought to have 50ohm termination. BNC-T on scope , rubi on one end of tee , and counter on other end of tee (50 ohm terminated). CFO Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Info needed on a Bliley NV92 10Mhz OCXO
I just got a Bliley OCXO (I hope) , but can't find any info on it. The OCXO has the following printed on it (see pict): Bliley NV92A721 10Mhz 12512169 SN 006 9703 Especially the Pinout + voltage/efc is missed. Picts are here (Imageschack has gone $$) http://www.eevblog.com/forum/reviews/need-info-on-a-bliley-nv92a721-10mhz- ocxo/ Shorter http://tinyurl.com/p5lomyq TIA CFO - Denmark -- e-mail: xne...@luna.dyndns.dk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] GPSDO simulation tool
On Fri, 21 Mar 2014 14:55:34 -0700, Tom Van Baak wrote: Have a look and let me know what you think. The tool is gpsim1.c (Windows: gpsim1.exe) under: http://www.leapsecond.com/tools/ Nice tool Tom I just compiled it under linux. gcc gpsim1.c -lm -o gpsim1 I had to add min/max #define min( a, b ) ( ( a b) ? a : b ) #define max( a, b ) ( ( a b) ? a : b ) Just an info ... GCC complains about this line (my 109 , your 96) fprintf(stderr, %s: sample count (%lg) exceeds data counts (%lg, %lg) \n, Tool, n, gps_n, osc_n); ~/tmp/tvb-gpssim $ gcc gpsim1.c -lm -o gpsim1 gpsim1.c: In function ‘main’: gpsim1.c:109:9: warning: format ‘%lg’ expects argument of type ‘double’, but argument 5 has type ‘long int’ [-Wformat] gpsim1.c:109:9: warning: format ‘%lg’ expects argument of type ‘double’, but argument 6 has type ‘long int’ [-Wformat] ~/tmp/tvb-gpssim $ ~/tmp/tvb-gpssim $ Thanx for the nice tool CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Frequency Counter using OCXO and MCU
On Wed, 12 Mar 2014 11:48:04 -0400, d0ct0r wrote: LCD connected to the same MCU. And it has relation to the core clock too. So, nothing on LCD before I reset entire MCU. I think initial incorrect core clock reading cause a lot of issues. Probably my only option will be to implement some external relay and timer to turn on MCU few seconds after OCXO. Or may be to put 10Mhz oscillator to PCB and connect OCXO output in parallel to it (not sure if its good idea or it will works). You could start the MCU up on the internal clock , write to the lcd , wait 5 sec. And then switch to the external clock. Btw: Is the Ext clock input on the STM fed directly from the OCXO ? Can the STM handle the OCXO voltage swing ? If you have a conditioning circuit betewwn the OCXO and the STM , i'd like to see it. As i have the need for one , trying to interface a 5v OCXO to a NXP 1114 Arm , that wants max 1.8v in the clockinput. CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Frequency Counter using OCXO and MCU
On Wed, 12 Mar 2014 09:42:05 -0700, Chris Albertson wrote: There are logic level converter chip made for this purpose or you can use a comparator and compare the 5V clock to ground. Or just a diode to clip the sine wave. If you connect a code. Sometimes you can set buy with a pair of resisters wired as a voltage divider. I like the comparator best because it will not load the clock. Diodes will load it for other users. Could you come up with some part numbers please. Ie. witch comparator would handle 10Mhz CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] *bay (cheap) - Datum 6502 Frequency Distribution Amplifier 10 Channels
Until now it's quite cheap *Bay #141175251426 CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] fast edge, rise time.
On Thu, 26 Dec 2013 16:07:49 +, ct1dmk wrote: The target is 4ns, while ideas seemed to be clear at some point, now I'm having doubts if better to use a MOSFET or a bipolar transistor as the switch element. Experiments with MOSFETs presented me some difficulties charging the gate capacitance having some trouble to achieve something in the 4ns region. Well 4ns seems hard whatever device anyway. Have a look here Jim Williams on eevblog https://tinyurl.com/nhyvtc3 CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Seek info: RS Harmonic Filter ATS-0W - Unit
Fellow time-nuts I just got a HP 8594E SA I know it's not t-nut grade , but it was what i could afford. HP 8594E Spectrum Analyzer 9KHz til 2,9GHz - option 004 = Precision Frequency Reference - option 010 = Tracking Generator 9KHz til 2,9GHz - option 041 = GPIB interface + Parallel Printer Interface - option 101 = Fast Time Domain Sweeps and Analog + Display - option 105 = Time-gated Spectrum Analysis - option 130 = narrow resolution bandwidths And a 85630A - Scalar Transmission/Reflection test set And i wanted to get some filters. So i just bought/won a: Rohde Schwarz Harmonic Filters ATS-0W - 19 unit model 1000.1755.02 http://tinyurl.com/px4w8tz I can't find any info at all on the net , and was wondering if anyone here had some info , especially about the GPIB (programming) and TTL plug on the backside. TIA CFO Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Seek info: RS Harmonic Filter ATS-0W - Unit
On Sun, 15 Dec 2013 13:16:26 -0500, Tommy phone wrote: CFO... I'd consider the'94E plenty suitable for time-nuts needs and you can do a lot with it. What questions do you gave about the HPIB? From Tom Holmes,N8ZM Hi Tom Thanx for the 94E assurance. There is plenty info on the 94E , especially as a first time user of a SA. My question was about info on the RS ATS-0W filter box , that i just won. It has a GPIB I/F but no manual or info , other than from the sellers site: CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Advice on getting a used Agilent E4432B RF-Generator
I have gotten a nice offer on a used Agilent E4432B (No Opts) I have 10Mhz so i don't need the OCXO , but i think it's Tnut-Grade equipment. I can get it for approx 1500 US$ delivered on my doorstep (EU) , this is not a bad price. Considering a US buy would be + shipping 25% VAT on unit+ship. I'm a bit worried about the number of attenuator cycles , is that thing on a ESG D (Digital) , unbreakable ? I just got some picts that i have uploaded here http://tinyurl.com/pxsdsu8 It has been put to good use ... On time : 45918 hr's , 658 pwr-cycles , and 1701932 attenuator cycles. But NO reverse pwr trips . The Spect analyser picts i don't think i can fully decode. I suppose (hope) the attenuator is electronic , and unbreakable in the ESG D series Hope someone can give some advice , especially if the attenuator cycles is something to be worried about. TIA CFO - Tnut-beginner in DK ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Advice on getting a used Agilent E4432B RF-Generator
On Tue, 19 Nov 2013 15:44:16 +, cfo wrote: I can get it for approx 1500 US$ delivered on my doorstep (EU) , this is not a bad price. Considering a US buy would be + shipping 25% VAT on unit+ship. Correction : Price is 1350 US$ delivered CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Advice on getting a used Agilent E4432B RF-Generator
On Tue, 19 Nov 2013 09:35:00 -0700, Tom Knox wrote: Amazing price, is there a gun involved? Thomas Knox No gun , but some previous buys from same seller. And no options installed in the unit. I have just been told that the attenuator is made up of some PIN-Diodes , and is virtually immune to wear. So i have decided to get the unit. CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] linux-gpib working on a RasPI
On Mon, 11 Nov 2013 20:44:59 +, cfo wrote: I have finally succeded in making linux-gpib build and load the agilent_82357a_gpib module. I have put the howto online here http://www.eevblog.com/forum/reviews/using-a-raspberry-pi-with-linux-gpib- and-a-beiming-or-agilent-usb-gpib-adapter/ or http://tinyurl.com/pry8fqu CFO (Bingo) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] linux-gpib working on a RasPI
I have finally succeded in making linux-gpib build and load the agilent_82357a_gpib module. Now i have a 3..5 Watt- Networked GPIB-Adapter , where even python bindings work. pi@raspberrypi-3 ~/raspi $ sudo python Python 2.7.3 (default, Jan 13 2013, 11:20:46) [GCC 4.6.3] on linux2 Type help, copyright, credits or license for more information. import Gpib inst = Gpib.Gpib(0,16) # address 6 inst.write(*IDN?) inst.read(100) # read 100 bytes 'KEITHLEY INSTRUMENTS INC.,MODEL 2015,1043877,B15 /A02 \n' I have tested (just *IDN? for now) with an Agilent 82357B and a Beiming S82357 GPIB-USB. Both reported my Keithley IDN ok. CFO - Tnut Beginner *** Kernel snip * Nov 11 20:22:06 raspberrypi-3 kernel: [ 184.631539] Linux-GPIB 3.2.19 Driver Nov 11 20:22:06 raspberrypi-3 kernel: [ 184.664507] agilent_82357a_gpib driver loading *** Agilent insert Nov 11 20:22:06 raspberrypi-3 kernel: [ 184.664681] usbcore: registered new interface driver agilent_82357a_gpib Nov 11 20:22:06 raspberrypi-3 kernel: [ 184.664702] gpib: registered agilent_82357a interface Nov 11 20:22:39 raspberrypi-3 kernel: [ 218.065122] usb 1-1.3: USB disconnect, device number 4 Nov 11 20:22:41 raspberrypi-3 kernel: [ 219.837498] usb 1-1.3: new high- speed USB device number 5 using dwc_otg Nov 11 20:22:41 raspberrypi-3 kernel: [ 219.937934] usb 1-1.3: New USB device found, idVendor=0957, idProduct=0518 Nov 11 20:22:41 raspberrypi-3 kernel: [ 219.937963] usb 1-1.3: New USB device strings: Mfr=0, Product=0, SerialNumber=0 Nov 11 20:22:55 raspberrypi-3 kernel: [ 233.427209] usb 1-1.3: USB disconnect, device number 5 Nov 11 20:22:57 raspberrypi-3 kernel: [ 235.197578] usb 1-1.3: new high- speed USB device number 6 using dwc_otg Nov 11 20:22:57 raspberrypi-3 kernel: [ 235.299248] usb 1-1.3: New USB device found, idVendor=0957, idProduct=0718 Nov 11 20:22:57 raspberrypi-3 kernel: [ 235.299280] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=5 Nov 11 20:22:57 raspberrypi-3 kernel: [ 235.299298] usb 1-1.3: Product: 82357B () Nov 11 20:22:57 raspberrypi-3 kernel: [ 235.299315] usb 1-1.3: Manufacturer: Agilent Technologies, Inc. Nov 11 20:22:57 raspberrypi-3 kernel: [ 235.299330] usb 1-1.3: SerialNumber: MY4945 Nov 11 20:22:57 raspberrypi-3 kernel: [ 235.309402] probe succeeded for path: usb-bcm2708_usb-1.3 Nov 11 20:23:20 raspberrypi-3 kernel: [ 258.549769] attached to bus interface 0, address 0xdb5e Nov 11 20:23:20 raspberrypi-3 kernel: [ 258.568586] agilent_82357a_attach: attached Nov 11 20:27:21 raspberrypi-3 kernel: [ 499.191299] usb 1-1.3: USB disconnect, device number 6 Nov 11 20:27:21 raspberrypi-3 kernel: [ 499.191651] agilent_82357a_driver_disconnect: exit *** Beiming insert Nov 11 20:28:22 raspberrypi-3 kernel: [ 560.873199] usb 1-1.3: new high- speed USB device number 7 using dwc_otg Nov 11 20:28:23 raspberrypi-3 kernel: [ 561.205274] usb 1-1.3: New USB device found, idVendor=0957, idProduct=0718 Nov 11 20:28:23 raspberrypi-3 kernel: [ 561.205304] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=5 Nov 11 20:28:23 raspberrypi-3 kernel: [ 561.205321] usb 1-1.3: Product: S82357 () Nov 11 20:28:23 raspberrypi-3 kernel: [ 561.205337] usb 1-1.3: Manufacturer: BEIMING Technologies, Inc. Nov 11 20:28:23 raspberrypi-3 kernel: [ 561.205352] usb 1-1.3: SerialNumber: CP1001 Nov 11 20:28:23 raspberrypi-3 kernel: [ 561.215169] probe succeeded for path: usb-bcm2708_usb-1.3 Nov 11 20:29:37 raspberrypi-3 kernel: [ 635.696267] gpib0: exiting autospoll thread Nov 11 20:29:37 raspberrypi-3 kernel: [ 635.696388] agilent_82357a_detach: detached Nov 11 20:29:37 raspberrypi-3 kernel: [ 635.696526] attached to bus interface 0, address 0xda1b7000 Nov 11 20:29:37 raspberrypi-3 kernel: [ 635.715456] agilent_82357a_attach: attached Nov 11 20:31:32 raspberrypi-3 kernel: [ 750.316900] /home/pi/raspi/linux- gpib-code/linux-gpib/drivers/gpib/agilent_82357a/agilent_82357a.c: agilent_82357a_read: agilent_82357a_receive_bulk_msg timed out, bytes_read=0, extra_bytes_read=1 pi@raspberrypi-3 ~ $ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Splitter for GPS antenna suggestions?
On Sun, 27 Oct 2013 00:43:33 +0200, Björn wrote: Here is a splitter that is way more than the Symmetricom/HP ones. http://www.gpssource.com/files/S1X4WI-Datasheet-005.pdf I also use the above splitters, but i think i got them from an Italian *Bay seller for 64€/pcs. I use them with a 40dB Andrew IceCone like this one (26dB) https://tinyurl.com/pryrunv CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 82357B GPIB USB from China
On Tue, 10 Sep 2013 20:04:05 +, cfo wrote: I have 2 firmware types , an i2c eeprom image , and an uploadable firmware (like the real Agilent). Ohh just to elaborate ... I use linux-gpib from SVN (under Debian-7 and Mint-14) and I got a new test firmware from Beiming (not released yet) The Beiming didn't work with the Agilent firmware from linux-gpib site. So they made one that would behave like the one from Agilent under linux. It seems like linux-gpib has just been updated to Ver 3.18 The linux-gpib support of the Beiming USB GPIB Adapters is now official. *Bay S82357 or F82357 (DMA) I have used it with my HP 6632B PSU , and also the HP 3478A meter. CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Req: Decent GPS Antenna Active/PassiveRecommendation
On Sun, 15 Sep 2013 10:42:36 +0100, Robert Atkinson wrote: Hi John, I use one of the 26dB active timing antenna like ebay item 271266449940 or 170889540720 but a quick look shows fluke.l is selling a 38dB one 300956651110 that might be good if you have a long antenna run. You don't say what receiver(s) you have, but the Thunderbolt needs a gain antenna. It's always best to put the gain at the antenna. On the subject of feeders, while the systems are 50R impedance, it is common to use 75R cable TV or satellite coax. It's cheaper and lower loss at 1.5GHz than common 50R cable. The loss due to mismatch is less than the reduced line loss. Trimble rcommend this approach. HTH, Robert G8RPI. I'm also using a MaxRad/Lucent but got 40dB's ... But watch out (too much gain can also be bad) , i use it with a N-to-F adapter , and 30m of quad shielded 75ohm-Coax. I made sure i got the Tube/pipe mount kit along ... See 290975411221 (ok price) or 271265728193 CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] TBolt temperature sensor
On Wed, 11 Sep 2013 17:20:07 -0700, Arthur Dent wrote: Didier Juges shalimr9 at gmail.com Wed Sep 11 12:24:51 EDT 2013 With all that discussion about the old temperature sensor in the TBolt no longer being available,... Actually I've bought all mine on Ebay and they are still available from the same seller plus others have some of the old revisions as well. It looks like the seller I used has over 500 units left. These are Rev C2 chips. The 3rd line of characters on the chip end with C2. The Rev D will work as well but do not use the Rev E chips because that's where the problem started to appear. Check: http://www.ebay.com/itm/140376728803 Item # 120552309518 appear to be Rev C2 chips as well. -Arthur Nice find Arthur ... I was searching for those , but missed them. Seller petlor , is/was actually posting that he had a reel of these on volt-nuts. He's also the guy who sold those PLETRONIC 26Mhz OCXO's with 100ppb stability (seems to be sold out). CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] TBolt temperature sensor
On Wed, 11 Sep 2013 11:00:15 -0600, Ed Palmer wrote: It looks like there might be one or two sellers on ebay that still have the old chips. Just make sure to ask what version the chip is before you buy. If the pics desc are correct this seller has them *Bay# 120552309518 http://tinyurl.com/pyyprva CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 82357B GPIB USB from China
On Tue, 10 Sep 2013 13:06:11 -0400, paul swed wrote: I am very curious to see if anyone has used one of these $95 wonders. I know the prologixs work from older time-nut posts. Regards Paul. I'm currently playing around with a Beiming GPIB adapter under linux-gpib. I'm using the SVN version , and i haven't detected any problems yet... http://tinyurl.com/prncq7w I have 2 firmware types , an i2c eeprom image , and an uploadable firmware (like the real Agilent). My tests haven't been extensive .. Some manual command entering via the linux-gpib test program , a bit of python via the linux-gpib bindings, and trying out gpib-utils on my HP 34401a. I haven't done any binary xfer's yet , but i know Beiming is working on testing that. Beiming claims to have Visa compability under Windows, and aims for the same under linux. CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 82357B GPIB USB from China
On Tue, 10 Sep 2013 18:19:09 +, cfo wrote: I'm currently playing around with a Beiming GPIB adapter under linux-gpib. I'm using the SVN version , and i haven't detected any problems yet... http://tinyurl.com/prncq7w I have 2 firmware types , an i2c eeprom image , and an uploadable firmware (like the real Agilent). Ohh just to elaborate ... I use linux-gpib from SVN (under Debian-7 and Mint-14) and I got a new test firmware from Beiming (not released yet) The Beiming didn't work with the Agilent firmware from linux-gpib site. So they made one that would behave like the one from Agilent under linux. It seems like linux-gpib has just been updated to Ver 3.18 CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Getting a 5370A tomorrow - How do i test it works
On Thu, 29 Aug 2013 00:02:30 +0200, Frank Stellmach wrote: Bingo, welcome on time-nuts, also! Follow the manual, the first basic test is simply connecting the reference output on the rear to the input and measuring frequency and T.I. This lets you test function and base noise level (35ps)hat. If this test passess, the machine is running well in first instance. Max. input level is specified in the manual, 10:1 divder provided, so nothing critical.. RTFM , sorry! Then I'd inspect the interior, which oscillator is mounted. Think of buying an OCXO, 10811, if you find the simple XO - it's already more fun. Frank Hello Frank et. all I just got the unit Serial: 2024Ax , so i suppose it's a 1980/W24 made in America. A nice surprise is the installed 10544A OCXO :-) The 10544A says Use insulated tunings tool only , i don't have a plastic or ceramic screwdriver ... Is the message because the house and the inside has different levels , or is only because the OCXO will jump when i retract the screwdriver ?. I might have a screwdriver with plastic on the shaft. For a 1980 unit it's surprisingly clean inside , it must have been in a lab or so. Now i'll check the voltage selector , put the lid back on , and do the tests from the manual. More to follow. CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Getting a 5370A tomorrow - How do i test it works
Hmmm ... Bad news I started the tests in section 4 , and all went well for approx 35 min. Test pg 4-28 - Table 4-3 - See Errata starting on page 4 PON test pg. 4-2 Step 1-13 : Disp 99.69 to 99.73 (flipping fast) Step 14 : 100 - Disp 99.69x to 99.70x - 100 - Disp 99.68x to 99.69x - 1000 - Disp 99.689x to 99.697x - 10K - Disp 99.7061 to 99.7084 - 100K - Disp 99.7053 to 99.7096 Step 15 : Disp 13.x to 17.x (flipping) - Min 99.73/75 - Max 99.80 (Err 02) Now the 5370A won't ARM (ARM light steady lit, with the int 10Mhz connected to Start) I goofed in one of the steps - Step 6 , where i should have selected DC on both AC/DC switches , they were unfortunately on AC. When i power the unit off/on it starts up fine (the start/stop) leds are blinking , but the display shows 0.00 , and once in a while if i'm lucky it arms and show 99.7 or so If i leave it It ends in Err02 after a while. Any hints ? CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Getting a 5370A tomorrow - How do i test it works
I bought a 5370A on *bay last week , and the unit is supposed to arrive tomorrow. I have never used such a beast , and as the seller wrote it is fully working , and passes self test. I was wondering if anyone could give some hints to test that it's working ok. I mean the input stages , known defects etc. ? I have a Tbolt ,a PM6680 Counter , a cheap Rigol DG1022 Func Gen, a working Linux-Gpib installation , and a Prologic GPIB-Ethernet adapter. And for clock sources: A Morion MV89,some 10Mhz *bay #310380778466 5v square out i think, some Pletronics 26Mhz OCXO's, a X72 Rubi, some FEI Rubi's and some Jupiter GPS boards to test with. But what do i do for a start ? Besides opening it up and vaccum clean it ,set it for 240V, and check if there's a OCXO in there ? Also what are the input voltage limits ? I'd rather not start by killing the input stages my self. I think i read around 1volt for the 5370A , and 3.3v for a 5370B ? But i also think Bruce wrote that (maybe only the B) would accept 5v , as the clamping diodes would then be active. Somewhere i also read that a 5v signal via a 270R resistor would be ok on the 5370A Thank you for any hints/tips,warnings or help. CFO - T-Nut Beginner Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Getting a 5370A tomorrow - How do i test it works
On Wed, 28 Aug 2013 20:06:11 +0100, Dr. David Kirkby wrote: On 28 August 2013 17:35, cfo xne...@luna.dyndns.dk wrote: and as the seller wrote it is fully working , and passes self test. I was wondering if anyone could give some hints to test that it's working ok. I often ask sellers how something was tested. Some peoples idea of tested is very different to mine. Likewise for calibrated - some peoples idea of calibrated is very different to mine. I know nothing about the 5370A, but as a general point, I think its working asking these sorts of questions. Dave Thank you for the answer but ... I figured at a price of 142€ (EU), it was now or never If i had wasted time asking q's , someone else had grabbed it. So this was a considered chance taken, as those are rare in EU CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] New to list and GPSDO questions
On Wed, 12 Jun 2013 20:29:26 -0700, Bob Stewart wrote: I saw on K3PGP's site a mention that the UT-41 GPS receiver had a 10KHz signal on-board so I decided, why not build a GPSDO for my new HP 5334B? Unfortunately the one I bought doesn't have a 10KHz point, and the board doesn't even pull out the 1PPS signal from the chip. As a backup plan have a look at this one *Bay 290860812674 It has 10Khz, afaik it's the one mentioned for the Miller GPSDO. Make sure also to get the Antenna cable that belongs to it. CFO Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] NTP Clock suggestions?
On Mon, 27 May 2013 14:29:11 +0100, Miguel Barbosa Gonçalves wrote: Hi! I was wondering if anyone knows about a not so expensive wall digital clock that gets its time from an NTP server... TIA, Miguel This was posted to the group @21-05 http://www.symmetricom.com/lp/gbu/email/time-display-promo-landing-page/? emailid=GBU078_NTD_Promo_ProdPglead_source=Web http://tinyurl.com/ptopb86 But it's funny ... I think there was a price on that page earlier ... CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] NIST DSS5 - Info
Gents I have just bought a NIST DSS5 unit on the 'Bay , # 190818033819 It's supposed to be a 0..7v AC reference standard , but i have no info about the unit or more important the GPIB command set. I don't expect NIST to keep the commandset (manuals) a secret , but doesn't have any contacts at NIST. I would really appreciate if anyone on the list could help me , in getting a NIST contact. Otherwise i suppose i have bought an expensive (EU shipping) box of components. I have found a bit of info here http://tiny.cc/tvzzvw TIA CFO , Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] NIST DSS5 - Info
On Tue, 23 Apr 2013 11:38:59 -0400, paul swed wrote: Pretty interesting. But do agree without a GPIB command set its simply a very nice case and $80 plus shipping is expensive for a nice case. Would love to see the inside of the reference. In particular the references. Most likely this getting way off topic. Regards Paul WB8TSL Ohh ... Should have gone to volt-nuts instead (forgot) ... Will repost over there ... Sorry CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] NIST DSS5 - Info
On Tue, 23 Apr 2013 13:45:02 -0400, Mike S wrote: On 4/23/2013 10:31 AM, cfo wrote: I don't expect NIST to keep the commandset (manuals) a secret , but doesn't have any contacts at NIST. Can you read the ROM(s), and do a strings on them? I suppose so ... When my unit arrives from/via USPS , and my Eprom-Burner arrives from China. CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Z3805A high value PU
On Wed, 17 Apr 2013 08:26:08 +, Mark C. Stephens wrote: On a more serious note, I have rack mounted both clocks with UPS power and they shall not be disturbed. http://www.vk2hmc.net/blog/?p=86 Many thanks, Is it wise to install an unregulated fan inside the 3805 housing , so close to the OCXO ? I'd have thought the OCXO would like it Nice and warm with out thermic disturbances. But the i'm just a t'nut beginner CFO - Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Datum/Symmetricom X72 Rubidium
On Sat, 16 Mar 2013 05:45:46 -0400, GandalfG8-YDxpq3io04c wrote: Hi All This messsage was a work in progress and was sent in error Please keep the info comming I did also get a X72 , for the 1-PPS conditioning. And was also bitten by the old firmware not supporting 1-PPS But after complaining a little bit. I got the seller to report the fw vers detected in mine. See 'bay #180791401271 I would love to be able to upgrade the FW , but haven't found any newer firmware or instructions. So the X72 is taking a rest for now ... CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Is possible precise 1pps?
On Thu, 14 Mar 2013 00:02:22 -0500, David wrote: My 1992 lacks GPIB so I can not use it for logging unfortunately and I lack a better timebase for comparison purposes anyway. Those are on my list of things to take care of. 'bay 370570297836 $50 CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] webcam app to watch for and time stamp changes
On Sat, 02 Mar 2013 11:33:02 -0800, Jim Lux wrote: I am interested in the timing behavior of my RSA fob, which changes every 60 seconds. Since I'm not about to open it up and probe inside, I was wondering if someone had a clever way, say using a USB web cam, to log the changes over a 48 hour period. You'd point the web cam at the fob, and it would log the time when the display changes Or one might even be able to look at the blinking 1 pps indicator using a light and photocell or something.. Isn't this Just what the doctor ordered http://smallhacks.wordpress.com/2012/11/11/reading-codes-from-rsa- secureid-token/ CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] OT: Who needsa a Spectrum Analyzer anyways
Just use your scope Sorry about the noise but you gotta see this http://www.eevblog.com/forum/testgear/agilent-dsa-x93204a-33ghz-80gss- teardown/ CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Interval Timer Recommendation
On Mon, 14 Jan 2013 09:32:36 -0800, Arthur Dent wrote: The 6680 in the attached photo is a little different than most because it has a Datum/Symmetricom X72 rubidium oscillator I installed for the internal time base. -Arthur http://i906.photobucket.com/albums/ac262/ rjb1998/6680battery_zpsb93793b7.jpg Thanx Arthur. I have an X72 here and some FEI-5680A's Could you share some info , maybe off-list TIA CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Interval Timer Recommendation
On Wed, 09 Jan 2013 21:48:00 +0100, Azelio Boriani wrote: and don't forget the PM6681 (50pS) I have a PM6680 (250 or 300pS) i think , but it was within my budget. I just read the Service manual , and noticed that both the PM6680 the 6681 has a battery inside that holds the settings. The manual states that loosing the settings on a 6680 is no big problem , but on the 6681 you loose the interpolator calibtation. And it sounds like that's not a good thing. I didn't know you had to watch out for Battery on a PM6680/81. CFO - Tnut-Beginner Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] single board PCs
On Sun, 06 Jan 2013 16:25:59 -0800, Jim Lux wrote: Consulting the hive mind.. If you're building a standalone widget (e.g. something like an NTP server we've been discussing, etc.) with an embedded PC, don't want to fool with hardware designing, etc.; use off the shelf OSes (win and Linux) and software (Matlab, Labview); have solid state boot/storage media.. No user interface needed (access is solely via network)... What's the hot ticket these days.. One of the CarPC things (most are a miniITX/miniATX with a USB or SD disk drive). (This is what I used last time) Raspberry Pi is a possibility, but I don't know that it has the oomph to run things like Matlab: and I suspect it doesn't run Windows I'd like something I can just order and give to the software guys to start coding on (they're using Matlab, Labview, and Python, in various combinations). Eventually, it will be packaged inside the box which is about 10x10x3 along with the GPS receiver and other measuremnet stuff (an FPGA with counters and the like). The FPGA will use USB for an interface (I think..).. There is a nice collection of Mini boards here (Atom AMD) http://www.mini-itx.com/store/ The Via-picoITX boards are neat (small) I like this QuadCore http://www.mini-itx.com/store/?c=90 CFO Tnut Beginner Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lady Heather for Linux?
On Tue, 11 Dec 2012 13:54:24 +, Chris Wilson wrote: Is there a version of Lady Heather for Linux, or any equivalent application please? Thanks. LH runs fine in Wine - I have 2 instances running on my Ubuntu server. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Search Time-Nuts Archive?
On Sat, 08 Dec 2012 11:24:15 -0500, Mike Garvey wrote: Is there a way to search the Archive? I can find the archive, but there seems to be no way to search the content. Thanks, Mike I sometimes use this site , has excellent search http://www.mail-archive.com/time-nuts@febo.com/info.html CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Search Time-Nuts Archive?
On Sun, 09 Dec 2012 15:11:34 +, cfo wrote: On Sat, 08 Dec 2012 11:24:15 -0500, Mike Garvey wrote: Is there a way to search the Archive? I can find the archive, but there seems to be no way to search the content. Thanks, Mike I sometimes use this site , has excellent search http://www.mail-archive.com/time-nuts@febo.com/ info.html CFO Strange i thinlk the list rewrite the url due to the email looking stuff http://alturl.com/nnw6p Try this one ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] An other project
On Tue, 20 Nov 2012 16:13:51 -0500, EWKehren-YDxpq3io04c wrote: I did mention a MAX 3000 implementation of a 1 pps generator. The attached picture shows the prototype. This came about to generate timing signals to test the counters. It is a TADD-2 Mini on steroids. Besides the Wenzel input and 4 outputs parraleled with resistors it has presently 6 inputs for output selecting or synchronizing and 6 additional outputs. Example duty cycle, frequency out of the 50 ohm.This is a good example of the flexibility of the use of this IC. If there is interest maybe we can agree on a couple of versions and find some one in the US and some one in Europe to sell a kit. Juerg and I are not getting in the kit business but it may be a precursor when D/M systems will roll out. At 25 $ in the US and 20 Euro in the EU who ever does it will make a little money for their trouble. That price would include shipping! Members can also use the unit to knit their own version, IC's can be reprogrammed. This is also the board that was used to do the jitter test. Passed with flying colors. Let me know what you think but I will not take orders, but find a way to make it available if there is interest Bert Kehren. Maybe it would be possible to use this board for the logic (Xilinx though) , but it's available in US EU http://dangerousprototypes.com/docs/ CPLD:_Complex_programmable_logic_devices http://www.seeedstudio.com/depot/xc2c64a-coolrunnerii-cpld-development- board-p-800.html?cPath=174 http://www.seeedstudio.com/depot/xc9572xl-cpld-development-board- p-799.html That would take care of the SMD stuff CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Followup (still want a GPS-type NTP refclock)
On Thu, 18 Oct 2012 13:03:14 -0700, Hal Murray wrote: It's a typical low-cost GPS via USB navigation unit. It's not a timing receiver. I was wondering why there wasn't someone on the list suggesting this Trimble (The A4 board) $87 eb* 290730738839 From the desc. it needs a 48v PSU. But else it was my impression that the list was impressed with the performance , and afaik The Lady was rewritten to support it. I bought 2 Tbolts from US , last year for $110 a piece , now they are $175 The effect of that guy that wanted to buy 1000 pcs , from the chineses dealers (Source ... fluke.l). Is clearly visible now. CFO - tnut beginner Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Counters for ADEV measurements
I also would love to get some hints/tips/secrets on ADEV measurement with my Phillips PM6680 - Clocked by a Tbolt. According to the Specs it should have : 250 ps single-shot time interval resolution 100 ps averaged time interval resolution Does anyone know if it suffers from the same 5/10Mhz issues as the HP's , the paper john presented wasn't clear about the pendulum models ? I'm also using timelab , to do the measurements. TIA CFO - Tnut beginner Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] T-Bolt Temperature
On Wed, 22 Aug 2012 20:55:07 -0700, Hal Murray wrote: I don't know how to search the Time-Nut archive for specific information. From the headers that are normally not displayed by most mail systems: List-archive: http://www.febo.com/pipermail/time-nuts Google also works nicely. I use www.mail-archive.com , they have a great search facility http://www.mail-archive.com/time-nuts@febo.com/info.html volt-nuts is also present (this year) CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Thunderbolt distribution amplifier needed.
On Tue, 21 Aug 2012 11:44:17 +0100, Chris Wilson wrote: Can anyone please link specifically to a suitable distribution amp for my TB please, Cost is a factor, and I am in the UK. An Ebay purchase would be painless. I feel it would be really easy for someone as daft as me to buy something totally unsuitable. I use a 350MHz 6-chan RGBHV Dist. Amp. i got cheap off eB..-UK for £30. I think i was lucky there ... It's a A Procon : 4516-01 , same as Solecis: AVB-DA-RGBHV-0106 , and also the same as this one. http://www.amx.com/products/AVB-DA-RGBHV-0106.asp There is what i would think .. a similar unit eB# 200798058748 , but at the listed price, you might want to go for one of the Extrons from US CFO Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] : L1 GPS timing signal(s) into local time on computer(s)
On Sun, 19 Aug 2012 15:29:22 -0400, Sarah White wrote: oh wow, thanks. I'll try that. Also, I figured out that typing in trimble thunderbolt instead of thunderbolt gps gives me zero hits for phone... but fewer hits for the GPSDO too :( Try to search on : 10mhz gps You should see most thunderbolts,and especially this one (eB#) 170886463609 US located , and the only decent priced Tbolts left on eB CFO - Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] T-Bolt Temperature
On Thu, 16 Aug 2012 20:38:42 -0500, Michael Blazer wrote: Do you know the part number of a chip to replace the DS1620? Mike Afaik this number on the eB.. site is a working good one a C2 : 140376728803 Sold by same guy with the 26Mhz ocxo's CFO - Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Is Timelab with a Prologix-Eth and a PM6680 - working ?
On Tue, 03 Jul 2012 15:33:33 -0700, John Miles wrote: Ahhh ... Thanx now i know why my 1hr Trace Duration was so fast. I assumed that Timelab would set the sampling interval written in Timelab via GPIB. But i'll just select 1sec manually. That can be a bit confusing. The TimeLab drivers for GPIB counters don't attempt to program the counter in any respect, beyond perhaps turning off continuous acquisition so that the program can fetch readings synchronously. The program may also disable various statistical features that are known to interfere with reading a stream of simple TI or frequency measurements. But for the most part, TimeLab expects you to configure the counter manually, using whatever settings and parameters you want. Then you have to fill in the acquisition dialog to tell the program what you're doing. This lazy approach violates the most commonly recommended GPIB programming practice, where the program begins by resetting the instrument to its default state and then programs all modes and settings of interest. But it's the only way I can afford the time to support lots of different counter models, most of which I don't own. :) For counters in talk-only mode, the acquisition driver can't program the instrument at all, so the above is doubly true. In the specific case of the Trace Duration field, TimeLab will estimate the rate at which readings arrive from the counter if you press the Monitor button and wait a bit for the estimate to settle down. If it doesn't seem to be converging on the right rate, try toggling the Monitor button off and on. Otherwise, if you don't use the Monitor feature, you will have to enter the trigger rate manually. I will try this now , and i assume i should then select Frequency in the Data Type - In TimeLab , as i don't use A-B measurements .. Or ? Most TICs exhibit some dead time between GPIB readings in frequency-count mode. For instance, if you use an HP 5370B in FREQ mode, you'll see something like 1.1 seconds between readings, instead of the 1-second gate time you may have selected at the counter's front panel. Not the end of the world, but something to keep in mind when deciding whether you want to capture TI or frequency data. That being said, when I use my 5370B, I usually use frequency mode with a 1-second gate time. It's quicker and much less error-prone to set up. The quantization/jitter floor isn't that much worse than what a TI measurement can achieve, I don't have to worry about whether the START and STOP sources are stable and close enough in frequency to avoid undersampling phase wraps, and the resulting data quality is OK for many purposes. This will be true for most other counters as well. When you are first getting started with TimeLab, I'd recommend sticking with frequency readings until you're more familiar with the overall process. Once frequency readings are being collected and displayed properly, you can consider switching to TI mode when appropriate. Finally, the Prologix adapters should work well with the various GPIB counter options in TimeLab, but especially with the Ethernet adapter, you may not want to use trigger rates faster than 1 Hz, at least not at first. As you get closer to 10 readings per second, the likelihood increases that the combination of the Ethernet adapter and the TimeLab driver won't keep up. The firmware in the Ethernet adapter doesn't handle these overrun conditions very well, and may lock up hard enough to require a power-cycle to recover. When I use a GPIB-Ethernet dongle with my 5370B, I usually keep the display rate control near 12 o'clock to limit the trigger rate to 4-5 per second. That's very reliable in my experience, but 10+ readings per second is not. -- john, KE5FX www.miles.io Hi John Thanx for a nice program , and the detailed explanation. Here is a graph of my Tbolt 10Mhz connected to Ext-Ref Chan-A , on my new PM6680. The 10Mhz is distributed via a 350Mhz RGB Video-Dist-amp A Procon : 4516-01 , same as Solecis: AVB-DA-RGBHV-0106 http://imageshack.us/photo/my-images/405/tbolt8hfreq.png/ The result looks more like what i expected The Lady shows 5.43E-13 as ADEV on the Tbolt-Osc , so the above might be what to expect. Thanx to all that have contributed to my learning process :-) CFO - T-Nut Beginner ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Is Timelab with a Prologix-Eth and a PM6680 - working ?
I just got a PM6680/016 - Std. Osc + GPIB + 1.3Ghz -Chan.C The best my budget could afford :-) I would like to try out John's Timelab. But only have a Prologix-Ethernet GPIB adapter , no USB version. I was wondering if anyone can confirm that Timelab would work on a PM6680 , using a Prologix-Eth ? I can see the Prologix-Eth mentioned in the TimePod usermanual , but only in the Wavecrest DTS-2050/2070 series section. I'm totally green in Timelab PM6680 , so any hints for a testsetup would be welcome. I'll connect my Tbolt to the PM6680-Ext.Ref , so i don't need an expensive internal osc. I was suggested by a fellow T-Nut , that connecting the Tbolt via a BNC-T , to both EXT-Ref Chan-A , and then do ADEV with a 1 sec gatetime. Would be a good start. So i'll prob. start with that. Next i have a X72 some FEI-5680A's , that i could connect to Chan-A TIA CFO - Timenut beginner ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Is Timelab with a Prologix-Eth and a PM6680 - working ?
On Tue, 03 Jul 2012 14:34:08 +, cfo wrote: I just got a PM6680/016 - Std. Osc + GPIB + 1.3Ghz -Chan.C The best my budget could afford :-) I would like to try out John's Timelab. But only have a Prologix-Ethernet GPIB adapter , no USB version. I was wondering if anyone can confirm that Timelab would work on a PM6680 , using a Prologix-Eth ? Well (blush) I can ansver my own question here. Timelab autodetects the Prologix-Eth (with mac ip) , and lists it below all the COMM-Ports. Nice work John ... So all i had to do was to select the detected Prologix , and set the PM6680 GPIB address. I'm acquiring data now , although not very impressive. I run my Tbolt signal through a Video Dist-Amp (400Mhz bw) , to get 6-channels. So i know the 75ohm imp there , but it's not been an issue so far. I feed the PM6680 Ext-Ref and Chan-A via a Dist-Amp output on a BNC-T. And have put a BNC-T on Chan-A with a 50ohm terminator on it. I have Chan-A set to 1Mohm , as i terminate the input via the BNC-T on Chan-A. But i wonder if the PM6680 Ext-Ref input already terminates with 50-ohm , and that could be the issue ?? The counter flickers occasionally in the last digit between 0 , 1 and 9 And Timelab says ADEV is 9.442-E-6 on T=1000 Secs. I would have expected something better LH says the ADEV is Osc ADEV is 5.442-E-13 on 1 Secs I wonder where i have FSCK'ed up , or is a Tbolt on Ext-Ref the same signal on Chan-A supposed to show that ? CFO - (Feeling very T-Nut Beginner now) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Is Timelab with a Prologix-Eth and a PM6680 - working ?
On Tue, 03 Jul 2012 18:11:26 +0200, Azelio Boriani wrote: When you start TimeLab, which mode does the PM6680 show? FREQ A or TIME A-B? It shows Data Type = time interval , i could also select frequency in the drop down box (This is the latest TimeLab - NonBeta). Now have i goofed ? Is time interval A-B inputs (blush) CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Is Timelab with a Prologix-Eth and a PM6680 - working ?
On Tue, 03 Jul 2012 18:11:26 +0200, Azelio Boriani wrote: When you start TimeLab, which mode does the PM6680 show? FREQ A or TIME A-B? I have uploaded a screenshot of the settings here http://img577.imageshack.us/img577/4171/timelabpm6680.png And the Timelab ADEV here http://img15.imageshack.us/img15/5705/76696902.png CFO Ps: I hope it's ok to ask here ... ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Is Timelab with a Prologix-Eth and a PM6680 - working ?
On Tue, 03 Jul 2012 19:08:56 +0200, Azelio Boriani wrote: Yes, you can ask here about these things. Anyway, the best is to use the TBolt as a reference (not necessarily on the external ref of the counter) and test another oscillator or GPSDO. For example: feed the TBolt PPS to A, the GPSDO_under_test PPS to B and measure the stability of the time interval using TIME A-B. Ideally it should be a constant value (even if not exactly 0, but constant). The phase data (the time interval errors) can be collected and an Allan deviation computed. Azelio , first ... Thanx for walking me through this. I'll try the above later on. But what you're saying is that when used as a TIC A-B , i don't need the TBolt on ext-ref ? , or do i need the TBolt on both Ext-Ref on Chan-A ? If i don't use the TBolt on Ext-Ref , won't i get hit by having a Std-Osc installed ? I have a GPS Antenna-Splitter , another TBolt (just need to assemble the PSU) , and also a X72 Rubi a few FEI-5680's. So i could try those when i'm a bit more familiar with the Counter program. The default sampling time is 200mS Ahhh ... Thanx now i know why my 1hr Trace Duration was so fast. I assumed that Timelab would set the sampling interval written in Timelab via GPIB. But i'll just select 1sec manually. So, to try your setup (TBolt on EXT REF and A): first inform the TimeLab that you have 1 second frequency samples, then set the sampling time to 1 second (use FUNCTION button on the PM6680) and retry collecting data.In this case the predicted uncertainty is 0.005 (5E-10) and sholud average out to 5E-13 in 1000 seconds taking into consideratin that the full 12 digit resolution is available at the PM6680 GPIB (that is, the GPIB has more digits than the display can show, see page 11-18 of the manual). I will try this now , and i assume i should then select Frequency in the Data Type - In TimeLab , as i don't use A-B measurements .. Or ? I'll also dig into - How to calculate measurement errors , as you describe above. Regards CFO - Tnut-Beginner ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] HP5386A GPIB
On Mon, 18 Jun 2012 09:29:07 +0200, Ton wrote: Hello Hui, I found that I needed: Ag488Wrap.ibeos(devDesc, 0x040A); // 04 = terminate read when 0A = /n is detected as part of the initialization. Without this, the communication with my 5384A timed out. That matches my findings on my HP5384A. It doesn't set EOI at end of data. But terminates all messages with 0x0A aka (\n) instead. It doesn't respond/excecute commands if the REN line isn't active. It expects GPIB commands to be terminated with 0x0A (\n) , so don't send Command0x0A0x0D , it wants 0x0A as last char to indicate (EOM). I suppose it's because it's pre SCPI. CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Strange E3610A PSU - Old revision
On Thu, 14 Jun 2012 16:58:41 +0200, Adrian wrote: There appears to be some massive contamination on the board, apparently not only from a leaked electrolytic cap. It looks much like some unknown liquid flooded a large area of the board and dried. I do not see any reworked solder joints on the board, so the 'unusual' components have to be original to the unit. Do not attempt to change the circuit (replace components with values from a schematic that does not match the given circuit exactly), otherwise you'll end up in a mess. You may perform the service note changes though, given you check carefully if they work for your unit. Especially the voltage overshoot issue should be easy to check in advance. The 12/91 date code on the transformer (unfortunately, the serial number is still undisclosed) indicates a very early example of the E3610A that was actually introduced in the 1992 catalog. As by the 1992 catalog, there is a 10-turn voltage pot and a 1-turn current pot. More recent versions have 10-turn current pots as does mine from 1998. Also, it has U2 = LM340T (!), U4 = LF442CN, U5 = LM393N, U1 = LF411CN, U3 = LM336. Hope that helps. Adrian Hi Adrian Thanx for the ansver. I have come to the same result That the parts are original mounted , and it's an early model. I have already been recommended a 2'nd cleanup of the PCB , and after a 2'nd washdown with IPA , and a top-side resolder of all the resistors in the PSU-Meter voltage divider section. The PSU volt meter is actually stable , and is following the PSU-Output , quite nicely. I verified by having my 34401A on the PSU-Output. Now i'll wait for the new CAPS to arrive , and then calibrate it according to the manual. First Current , and then voltage. I don't have the Current cal. resistors specified in the manual , but i just got an Agilent 6632B. Witch should be able to work as a variable 0..5 Amp load. Providing i can get it to do that (manual reading). I actually think i have gotten the PSU to behave now. Thanx for all the hints. Ps: Current Calibration hints are welcome ... CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Strange E3610A PSU - Old revision
I just bought a E3610A PSU on ebay , as defective. Main problem right now is ... This seems to be an older revision And has other comp values , than the Schematic on the net CompItem - Org Value - Inserted value - --- - - R19 CC frontpanel Pot - 10 turn 10k - 1 turn 10K U2 12v Regulator - MC7812CT - LM340T12 U4 Current OpAmp - LF442CN - LM1458N U5 CC/CV Indicator - LM393CN - LM393N U1 Voltage OpAmp - LF411CN - LM741EN U3 Volt Ref - LM336-5.0 5.0v- LM329 6.9v PCB PCB number- ?? C7 Pos. REF CAP - 330uF 50v - 330uF 50v C13 Neg. REF CAP - 470uF 50v - 330uF 50v I posted some pics here. http://tinyurl.com/cn9p4s9 Does anyone have a schematic of a E3610A , that might have ie. LM1458 in it or a 6.9v Ref , instead of a 5v Ref ? Tia CFO Denmark ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Une Rigol Scope for spectrum analysis
Just saw this , and know some of the guyzz have Rigol's. http://www.eevblog.com/forum/general-chat/using-rigol-ds1052e-for- spectrum-analysis/ http://meteleskublesku.cz/wfm_view/ I cant test as it apparently needs Win7 or Server2008 Maybe anyone else could benefit. CFO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] GPS and Rubidium frequency standards and noise question (newbie).
On Sun, 03 Jun 2012 18:16:15 -0400, Bob Camp wrote: Hi As long as it shows rev E or rev D it's likely a later version unit. The date code on the OCXO is the best indicator, but even that's not 100%. As long as it's one made after about 2002 you will have a good one. Search on Eb..: 10mhz gps I bought 2 from the American seller , he has Item# 170848624524 And they were Rev E , after a month or so i bought some of the old DS1620 temp sensor chips Item # 110888667598 , but i think these might be the old type also Item # 140376728803 , in the US. The old DS1620's are purely cosmetic (I have been told) , but i like the moving temperature graphs. Then you'd need: A PSU (+/-12v +5v - Ie. Item# 170609590979) A gps timing antenna (26+ dB or so - Ie. Item# 180518378555) - This type have an N-Connector mounted , the Tbolt uses F-Connector , so get an N-to- F adapter , and some F-connector plugs. Last some good 4-shielded 75ohm sat cable. /Bingo ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
