[time-nuts] HP8648 Series
Hello, I have posted questions about the HP8748A/B/C/D series of RF generators on the Keysight forum and also on the HP/Agilent group but the answers have been slim. So I am wondering if there is anyone from HP on the group that worked on these units or knows someone who did. I have a unit that a resurrected (8648C) that had a bad battery and a bad A10 module. It appears that the unit is in calibration but when I turn the RF on the display on the bottom right switches from RF OFF to PULSE. The unit does not have the pulse option installed and is not indicated that there ever was on on the \ instrument option label. I have the service manual and there is a rather lengthy method to run Windoze based software to report the installed options but if I read the manual correctly any change to the option list (if you write the data back) clears the calibration data requiring a complete re-calibration of the instrument, something I would rather not do. So if anyone out there has any hacks out there to fix this I would greatly appreciate any info. Sam W3OHM ___ 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] Racal Dana Switches
On Sun, Apr 22, 2012 at 8:00 AM, wrote: > Send time-nuts mailing list submissions to >time-nuts@febo.com > > To subscribe or unsubscribe via the World Wide Web, visit >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > or, via email, send a message with subject or body 'help' to >time-nuts-requ...@febo.com > > You can reach the person managing the list at >time-nuts-ow...@febo.com > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of time-nuts digest..." > > > Today's Topics: > > 1. About Racal Dana tactile switches (Fabio Eboli) > 2. PRS-10 input and output calibrations (Magnus Danielson) > > > -- > > Message: 1 > Date: Sun, 22 Apr 2012 13:44:41 +0200 > From: Fabio Eboli > To: time-nuts@febo.com > Subject: [time-nuts] About Racal Dana tactile switches > Message-ID: <20120422134441.11826g3ah983h...@webmail.micso.net> > Content-Type: text/plain; charset=ISO-8859-1; DelSp="Yes"; >format="flowed" > > Hello, this is my first message on this list, > I've read the recent thread about racal dana's switches, > this is the way i've done it: > > http://imageshack.us/photo/my-images/194/pulsantenuovo1r.jpg/ > > in this thread more details: > > > http://www.eevblog.com/forum/product-reviews-photos-and-discussion/racal-dana-1992-teardown/msg90950/#msg90950 > > A little crude but in a pair of hours i swapped all the switches. > To obtain the proper tip shape to fit the original caps, > i cutted a cross in a 2mm thick little brass plate and > fixed it to a soldering iron, found the correct > flow temperature of the plastic and the work was simple. > > The switches are normal 6x6mm tactile, only they tend to bounce sometime. > > Fabio. > > > This message was sent using IMP, the Internet Messaging Program. > > > > > > -- > > Message: 2 > Date: Sun, 22 Apr 2012 13:49:06 +0200 > From: Magnus Danielson > To: Time-Nuts > Subject: [time-nuts] PRS-10 input and output calibrations > Message-ID: <4f93f032.2040...@rubidium.dyndns.org> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Fellow time-nuts, > > Anyone who has tried to calibrate the PPS input and PPS output > interpolators of the PRS-10? > > The output calibration seems pretty easy to do, just a TIC to measure > the PPS to 10 MHz and then sweep through the output delay values to > cover a little more than the 400 ns range. > > The input calibration would be something in the similar way, a simpel > method would be to use a coax cable between output and input, and then > use the internal output offset to measure the range of the input > interpolator. However, the input interpolator is a decade better than > the output interpolator. However, considering that I have a 5359A just > waiting to be used, I think I use a fixed output PPS delay and trigger > the 5359A with and then sweep that one. > > I would then use the collected data to find suitable correction values. > > Comments and suggestions? Experience? > > Cheers, > Magnus > > > > -- > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > End of time-nuts Digest, Vol 93, Issue 114 > ** > ___ 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] Link for WWVB PSK Remover by Paul WB8TSL and group folder
I set up a folder on my PogoPlug device which can be used by Time-Nuts members to upload and download files and documents. It is suggested that users zip project files with descriptive names. As long as there are no bandwidth issues I will leave this link up for the groups use. Please do not put any files there that you want to keep private or files that you do not have a right to post for public access. Please file this link away for future use. http://ppl.ug/ysoCRmlPKuY/ Best regards, Sam W3OHM Owner and Moderator LeCroy_Owners_Group on Yahoo! Groups ___ 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] Linked-in Emails
Hello, I am sorry for the email traffic that Linked-in has generated. Somehow it picked up every email address in my email list. My appologies, Sam ___ 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] Tracor 599J Mods?
Does anyone know if there are any mods for these receivers for when WWVB changes their modulation format? Is the WWVB change a done deal? It makes no sense to me to change this format as most people that carry a cell phone don't need a watch (nor wear one) anymore, much less a WWVB enabled watch. Sam W3OHM ___ 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] Serial port server .. any interest in a write up on using ?
Its interesting that this subject has come up. I use IP enabled serial ports daily to communicate to various remote RF devices that I have installed for work using the built-in serial bridge on the Mikrotik routers and also on the Barix IP audio decoders/receivers. As an experiment I had no problems accessing my Nortel GPSTM with one, but I was not able to program a Picaxe. In my case I use my own software to communicate to the devices as it really is just a simple socket connection but if I need a "real" virtual serial port then I use http://www.eterlogic.com/Products.VSPE.html which works amazingly well. I even wrote a Python script which allows me to access the remote RF gear from the terminal on my Nokia phone. The other day I went on the hunt for a dedicated serial/IP converter for a project and found small OEM style module for $29 US. #230623218564 at the usual place. //Sam ___ 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] Pinouts for a Trimble Resolution T Timing GPS module 12ns 1pps
ftp://ftp.trimble.com/pub/sct/embedded/bin/Manuals/ResolutionT_072408.pdf - Original Message - From: Ken Kubick [mailto:kenkub...@hotmail.com] To: Time Nuts [mailto:time-nuts@febo.com] Sent: Thu, 17 May 2012 17:24:05 +1000 Subject: [time-nuts] Pinouts for a Trimble Resolution T Timing GPS module12ns 1pps > > Does anyone have or know where I can find the pinouts for a Trimble > Resolution T Timing GPS module 12ns 1pps? > > Thankyou > > Ken Kubick > > kenkub...@hotmail.com > ___ > 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 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] Conformal Coating
For conformal coating I recommend Humiseal Acrylic 1B73 in aerosol. You can also get it in brush form. I believe that Chemtronics used to offer acrylic coating as well, maybe even re-packaging the Humiseal product. I don't know if there is a source for small quantities of Humiseal but it is a fine product. I have also used Krylon clear acrylic that you can get at Wall-Mart in a pinch. The acrylic coatings I have found are better for HiZ circuits that have requirements for low-leakage. Consult the can for solvents and make sure that what you are coating are compatible with Toluene, Ketones, Acetone, etc. be careful around connectors as the coating will wick into connectors as the 1B73 is a fairly low viscosity. You can also get Humiseal formulations 1B38 and 1B66 which are also Acrylics but are brush on and require a one gallon minimum purchase. The shipping cost for a gallon is almost as much as the product due to the requirement that it be shipped as a hazardous material (flameable). The acrylics can be dissolved with MEK or any of the solvents I have listed above. You can remove a small amount with a Q-Tip. The Humiseal product also has a UV indicator in it that glows blue under a black light so you can check coverage. I have tested Humiseal Acrylic on probably 1000+ PCB's and it has yet to fail me. It is also easy to rework and re-coat after repairs. You can also get polyurethane coatings but I do not recommend them since they are more difficult you use, not as easy to remove and have better performance for HiZ and RF circuits. Good luck and let us know how you make out. Sam W3OHM http://www.hmcelectronics.com/product/Chemtronics/CTAR12 On Mon, May 14, 2012 at 7:31 PM, wrote: > Send time-nuts mailing list submissions to >time-nuts@febo.com > > To subscribe or unsubscribe via the World Wide Web, visit >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > or, via email, send a message with subject or body 'help' to >time-nuts-requ...@febo.com > > You can reach the person managing the list at >time-nuts-ow...@febo.com > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of time-nuts digest..." > > > Today's Topics: > > 1. Re: Why are 1PPS signals so skinny? (Jim Hickstein) > 2. Re: Why are 1PPS signals so skinny? (Azelio Boriani) > 3. Re: wwvb weak on east coast especially when the pre-amps > under wa... (Michael Blazer) > 4. Re: wwvb weak on east coast especially when the pre-amps > under wa... (Azelio Boriani) > 5. Re: Why are 1PPS signals so skinny? (Michael Blazer) > 6. Re: Why are 1PPS signals so skinny? (Bob Camp) > 7. Re: wwvb weak on east coast especially when thepre-amps under > wa... (Alan Melia) > > > -- > > Message: 1 > Date: Mon, 14 May 2012 18:18:20 -0500 > From: Jim Hickstein > To: time-nuts@febo.com > Subject: Re: [time-nuts] Why are 1PPS signals so skinny? > Message-ID: <4fb192bc.4060...@jxh.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > On 2012/05/14 18:02, time-nuts-requ...@febo.com wrote: > > https://assist.daps.dla.mil/quicksearch/ is the search site for > military standards. > > Hmm. Doesn't find MIL-TGDBP-41. I got this from my (now late) great > uncle, Bob > Sedgwick -- who was to hydraulics what I am to computers, only he has a > number > of patents. > > Some smart-aleck at Wright Field, as it then was, put this on a drawing, > and it > went without comment for quite a while until someone tried to look it up. > This > escalated to a bird colonel, who then tracked down the miscreant. > > It stands for Make It Like The G-D Blueprint For Once. > > > > -- > > Message: 2 > Date: Tue, 15 May 2012 01:21:26 +0200 > From: Azelio Boriani > To: Discussion of precise time and frequency measurement > > Subject: Re: [time-nuts] Why are 1PPS signals so skinny? > Message-ID: > > > Content-Type: text/plain; charset=ISO-8859-1 > > Maybe the correct number is MIL-STD-188-115? > > On Tue, May 15, 2012 at 1:18 AM, Jim Hickstein wrote: > > > On 2012/05/14 18:02, time-nuts-requ...@febo.com wrote: > > > >> https://assist.daps.dla.mil/quicksearch/ is the search site for > >> military standards. > >> > > > > Hmm. Doesn't find MIL-TGDBP-41. I got this from my (now late) great > > uncle, Bob Sedgwick -- who was to hydraulics what I am to computers, only > > he has a number of patents. > > > > Some smart-aleck at Wright Field, as it then was, put this on a drawing, > > and it went without
Re: [time-nuts] Manual or Software for FEI Pico Sync?
I wonder if the PicoSync-II software would be compatible? http://support.fei-zyfer.com/95_download.aspx > Hi: > > Is there a manual, data sheet, docs of any kind or software for the FEI Pico > Sync? > http://www.prc68.com/I/FEIFS.shtml#Picosync > > -- > Have Fun, > > Brooke Clarke > http://www.PRC68.com > http://www.end2partygovernment.com/Clarke4Congress.html > > > ___ > 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 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] Trimble Resolution SMT - good/bad/indifferent?
I uploaded the FEI-Zyfer WAAS papers to zippyshare if anyone is interested. http://www32.zippyshare.com/v/66696070/file.html Sam. Zyfer produced a paper on WAAS for timing. <http://support.fei-zyfer.com/downloads.aspx> You will need to create a log-in and password to download their stuff. Rob Kimberley ___ 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] Trimble Resolution SMT - good/bad/indifferent?
I don't know what firmware version is in the units fluke.l is selling but after reading a technical bulletin regarding the Resolution T, I wonder if the SMT version is susceptible to the same "signal tracking outage every 12.5 minutes" bug that the Resolution T firmware previous to 1.17 (21/01/2010) suffered as they both use the same receiver architecture. Sam ___ 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] Trimble Resolution SMT - good/bad/indifferent?
Hi Mark, This looks like a interesting receiver. There is no mention of an enable pin in the manual, and it states that "The Resolution SMT GPS embedded timing board is configured to automatically output the 0x8F-AB and 0x8F-AC packets" so I guess you would expect to see something.. can you see the PPS pulse? Is the reset pin low somehow? Maybe the latest build (8th March 2012) of Trimble Studio might be helpful, It has the SMT version listed in it's configuration menu. ftp://ftp.trimble.com/pub/sct/misc/bin/TrimbleStudio/TrimbleStudio.exe http://www.dpie.com/manuals/gps/trimble/ResolutionSMT_1A_UserGuide_5347.pdf Sam. - Original Message - From: Mark Sims [mailto:hol...@hotmail.com] To: time-nuts@febo.com Sent: Wed, 09 May 2012 21:01:01 +1000 Subject: Re: [time-nuts] Trimble Resolution SMT - good/bad/indifferent? > > I got a couple of these in and cannot get them to talk. There are two pins > on the connector that are labeled reserved and no-connect. The no-conect > pin has a trace going to (at least) a cap. Perhaps there is an enable pin? > Has anybody got these to work? > ___ > 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 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] NTGS55A Undocumented TSIP data
Example Packet: 10 8F AE 01 00 00 09 00 02 00 00 00 41 00 01 F4 00 5A 00 00 3D AE 81 20 3B F2 14 BD 10 03 Packet Breakdown: 10 8F AE 01 00 00 09 = LED Status 5 LED's on front panel Yellow Red Green Locked Holdover 01 Yellow 02 Red 03 Yellow, Red 04 Green 05 Yellow, Green 06 Red, Green 07 Yellow, Red, Green 08 Locked 09 Yellow, Locked 11 Yellow, Holdover 12 Red, Holdover 13 Yellow, Red, Holdover 14 Green, Holdover 15 Yellow, Green, Holdover 16 Red, Green, Holdover 17 Yellow, Green, Holdover 18 Locked, Holdover 19 Yellow, Locked, Holdover 00 = Frequency FOM 00 Stable 01 Stabilizing 02 Unlocked/Holdover 03 Unlocked/Power-up 02 = Time FOM 00 <1 ns 01 1ns to 10ns 02 10ns to 100ns 03 100ns to 1µs 04 1µs to 10 µs 05 10 µs to 100 µs 06 100 µs to 1 ms 07 1 ms to 10 ms 8 10 ms to 100 ms 09 >100 ms 00 = Holdover Reason 00 Not In Holdover 01 No GPS Data 02 GPS Data Invalid 03 TRAIM Reject 04 Manual Holdover 05 In Recovery 06 Antenna Fault 07 00 = 16X PLL Lock 00 Locked 01 Unlocked 00 = Mode 00 Normal 01 Power Up 02 Auto Holdover 03 manual Holdover 04 Recovery 05 Fast Recovery 06 Disabled 07 5 Minute Recovery 08 Free Run 09 Firmware Restart 41 = Flash Device in use 41 A 42 B 43 C 44 D 45 E 46 F 00 01 F4 00 5A 00 00 3D AE 81 20 3B F2 14 BD 10 03 Which looks to be the TSIP version of the SCPI Time Code Query. Time Code Query This command returns the timecode message 980ms to 20ms (inclusive) prior to the next Even_Second of indicated time. An example of the response is: T1#H20AF16AC41+00B4 * T1 = Format identifier. * #H = Number representation identifier. * 20AF16AC = GPS time in seconds of the next 1 PPS on-time edge. The 1 PPS edge being referenced is the internal 1 PPS used by the GPSTM and does not appear as an output from the GPSTM. (If two requests for the time of day query occur one second apart, one response will be associated with both the internal 1 PPS and the external Even_Second, while the other response will only be associated with the internal 1 PPS signal.) * 4 = Time figure of merit (TFOM). * 1 = Frequency figure of merit (FFOM). * + = Leap second information. A "+" sign indicates a pending GPS leap second, while a "0" to indicate no pending GPS leap second. * 0 = Alarm indication. * 0 = Service request. * B4 = Checksum. The format of GPS time is a 32-bit integer represented in HEX. The TFOM message is defined as the integer part of 10*log(time error in ns); * 0 <1 ns * 1 1ns to 10ns * 2 10ns to 100ns * 3 100ns to 1µs * 4 1µs to 10 µs * 5 10 µs to 100 µs * 6 100 µs to 1 ms * 7 1 ms to 10 ms * 8 10 ms to 100 ms * 9 >100 ms //Sam. - Original Message - From: Mark Sims [mailto:hol...@hotmail.com] To: time-nuts@febo.com Sent: Mon, 07 May 2012 12:22:05 +1000 Subject: [time-nuts] NTGS55A Undocumented TSIP data > > The Nortel NTGS55A receivers output an undocumented 8F-AE data packet every > second. The Palisade receivers also output an 8F-AE packet, but it is > totally different. The last 8 bytes appear to be two 32-bit floating point > numbers that change every packet. One of the numbers appears to occasionally > track the PPS error value. The rest of the packet looks like static data > values. Does anybody have any info on the Nortrel 8F-AE packet? > > > ___ > 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 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] NTGS50AA 1pps
If you wanted to drive a Quartz clock directly from the GPSTM you could consider dividing the 9.8304 MHz output by 300 somehow. > One of the things I did consider was driving the motor of a Quartz clock > directly from the 1PPS2 signal. > > 73, > Murray ZL1BPU > > > > > ___ > 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 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] NTGS50AA, better than Thunderbolt
I bought 3, NTGS50AA from fluke.l, a few months ago after I sussed out how to get Lady Heather talking to my first one. (to beat the rush and price inflation that this would probably cause..) Of my 3 units 2 are "T2" the other is "T". The Nortel design spec states: Oscillator "XXX" will identify which OCXO was used in the particular device. XXX is to be either "T", "Oak", or "T2". The "T" identifies the Tekelec DOC-1903 device and the "Oak" indicates the OFC-4895 device from Oak Frequency Control Group. A "T2" will indicate the Tekelec DOC-2127 device. Kevin, you asked if there was a PPS output. There isn't a 1PPS output at all, but there is a Even Second output with a negative pulse, 40-60 ns wide. This is available via the font mounted SMB connector or via the rear 110-pin "AMP Z-pack" connector. Sam. Subject: Re: [time-nuts] NTGS50AA, better than Thunderbolt > There are/were two listings for what looks like about the same thing. > fluke.l is/was selling one with $25.00 shipping, but the markings on the > oscillator case look like 34310-0 or O whereas the other listing showed a > 34310-T2 oscillator if I remember correctly. I also see some 34310-T bare > oscillators on ebay so there are several versions of the oscillator. I > have no idea how they differ. I've got a Trimble unit I bought on ebay 2 > or 3 years ago from some sort of telecomm equipment that is similar but > definitely from a different unit, and there are no markings on that > oscillator at all and it looks like the metal case is smaller and there is > no insulating foam around it. > > Alan > > On Thu, May 3, 2012 at 2:54 PM, EB4APL wrote: > > > Well, I don't understand well what is happening. Unless I am totally > > wrong and bought a piece of crap, I still see $25 as the standard > > international shipping. I just bought one. > > > > Ignacio, EB4APL > > > > > > > > > > On 03/05/2012 22:33, Steve wrote: > > > >> Guess I waited too long to order. $60 for shipping - I'll pass. > >> > >> Steve > >> > >> > >> > >> On May 3, 2012, at 3:16 PM, Dan Rae wrote: > >> > >> On 5/3/2012 1:08 PM, Steve wrote: > >>> > >>>> Did the seller double the shipping cost today? I could have sworn it > >>>> was $30 the > >>>> last time I looked at the listing. > >>>> > >>>> Steve > >>>> > >>>> Yes, he did. Unfortunately I didn't check since I still had the page > >>> open from earlier, and didn't find out till I went to Paypal... > >>> > >>> He certainly isn't getting positive feedback from me. > >>> > >>> Dan > >>> > >>> __**_ > >>> time-nuts mailing list -- time-nuts@febo.com > >>> To unsubscribe, go to https://www.febo.com/cgi-bin/** > >>> > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > >>> and follow the instructions there. > >>> > >> __**_ > >> time-nuts mailing list -- time-nuts@febo.com > >> To unsubscribe, go to https://www.febo.com/cgi-bin/** > >> > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > >> and follow the instructions there. > >> > >> > > __**_ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to https://www.febo.com/cgi-bin/** > > > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts> > > and follow the instructions there. > > > ___ > 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 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] Something better than a Thunderbolt?
Peter, You can display signal strength vs az/el by pressing the letters "s a s" on your keyboard. S = Survey A = Antenna S = Signals Sam. - Original Message - From: Peter Gottlieb [mailto:n...@verizon.net] To: Discussion of precise time and frequency measurement [mailto:time-nuts@febo.com] Sent: Fri, 04 May 2012 00:00:22 +1000 Subject: Re: [time-nuts] Something better than a Thunderbolt? > Interesting. I wonder what other GPSDO units are out there in the cell > systems > which might find their way to the surplus market? > > By the way, how do you get Lady Heather to show the plot of signal strength > vs > az/el? I tried all sorts of different graphing options and read through > everything I could find with no luck. > > Peter > > > > On 5/3/2012 8:02 AM, Mark Sims wrote: > > Recently Sam managed to poke and prod a Trimble/Nortel GPSTM (NTGS50AA) > enough to wake it up out of its slumber and be recognized by Lady Heather. > The NTGS50AA is a version of the Thunderbolt done for Nortel. It has some > interesting features (like hot-upgradable firmware, single 24 or 48V power > input, cheaper than a tbolt, etc. It also has a few warts... no TSIP > command documentation being the main one and a few commands are definitely > different than the Tbolt. > > The wakeup technique is rather crude and can take a couple of minutes > (shout a particular command into its ear until it wakes up). Trimble's > software manages to get it talking immediately. Duplicating the commands > that Trimble sends does not seem to work. Once it wakes up, it stays awake > until you power cycle it or run Trimble's software. > > > > I purchased one of these units from an Ebay seller in Old Cathay (around > $70 or make offer plus $30 shipping) to see what it would take to add > support to Lady Heather. My unit came in a week or so later. I hacked a > 48V power connection (literally) onto the board and powered it up with a > wall wart. After some futzing and puzzling over the proper ribbon cable > orientation between the main board and front panel board, I got the unit > woken up using Sam's technique and puzzled out the commands to make the > oscillator disciplining (time constant, damping, dac gain, etc) work. The > old survey location was in a sketchy Guatemalan smuggler's haven border town > at what looks like a private residence. > > > > After running it a while, it became apparent that it works better than > the Thunderbolt. The temperature sensor does not have those glitches that > plague the tbolt. The receiver has a bit more sensitivity. And, best of > all, the oscillator is pretty much immune to external temperature changes > (the Tbolt oscillator makes a good thermometer). The reported OSC and PPS > rms errors are exceedingly low... you have to actively thermally stabilize > the Tbolt to approach these numbers. Hopefully this quality extends to its > phase noise, etc spec. It would be interesting to see what thermally > stabilizing the unit would do... > > > > > > > > ___ > > 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. > > > > > > - > > No virus found in this message. > > Checked by AVG - www.avg.com > > Version: 10.0.1424 / Virus Database: 2411/4975 - Release Date: 05/03/12 > > ___ > 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 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] Trimble/Nortel GPSTM (NTGS50AA) - working with Lady Heather.
I would be happy to put a GPSTM online via a TCP Serial Port (RFC 2217) to help with the debugging. Sam > Hi > > Gee, now if we just could talk *someone* into adding a feature to Lady > Heather :)…. > > Bob > > > On Apr 15, 2012, at 8:23 PM, Sam wrote: > > > There was some discussion in Dec 2011 regarding the Trimble/Nortel GPSTM > (NTGS50AA) which fizzed out after it was mentioned that Lady Heather would > not work with these units. I was undeterred and purchased some anyway. > > > > I have started playing around with these and have discovered that by > asking it Sat status (0x10, 0x3C, 0x10, 0x03) at ~300ms intervals the unit > will start streaming data after a few seconds. Once the Trimble is in this > state Lady Heather detects the GPSDO and seems to work normally... Except > the TC and DAMP fields which are reported as 0.0 and GAIN which is reported > as -3.500 Hz/V (Tboltmon reports the correct values) I have read that this > also happens with older Thunderbolts? > > > > I have written a small Windows app (available on request, off list) that > sends the required packets to the GPSTM and by wrapping it in a batch file I > have it opening Lady Heather once the unit is in the required state. (Only > required once, or after running Tboltmon) > > > > > > Details of my 3, Trimble NTGS50AA's are: > > > > Firmware: > > App: 2.68 - 16 Dec 2004 > > GPS: 10.4 - 15 Dec 2004 > > > > GPS receiver has 8 Channels. > > > > Default disciplining parameters as reported by Tboltmon: > > Time Constant (sec): 100.0 > > Damping: 1.2 > > Ko (Hz/V) 1.20 > > Min Voltage: 0.0 > > Max Voltage: 6.0 > > Initial DAC Voltage: 3.00 > > Jam Sync Thresh (ns): 0.0 > > Max Freq Offset (ppb): 45.0 > > > > These GPSDO's uses the Trimble 34310 DOCXO which I think is the Vectron > OC-050? > > > > There are 4 SMB RF connectors on the main board: > > 1. GPS Antenna Input > > 2. 10.000 MHz Output > > 3. 9.834 MHz Output > > 4. 0.5 Hz (Even Sec) PP2S Output. Unfortunately requesting the unit to > output 1PPS does nothing. (yet) > > > > The 9.8304MHz output may be handy.. divided by 300 it's 32.768 KHz ;) > > > > Power Supply: > > The NTGS50AA requires 36-75 VDC (48V nominal) and has a on-board Lucent > DC-DC converter to supply the required +/-12 and +5 volts. > > > > Serial Interfaces: > > Port A is RS-422 @19200 SCPI (available on the 110 pin connector on the > main board) > > Port B is RS-232 @9600 TSIP (DB9 connector on Breakout board) > > > > LED indicators: > > There are 5 LED's on the breakout board that contains the DB9 connector. > > 1. Power > > 2. Not used, but switch-able via software > > 3. Not used, but switch-able via software > > 4. Lock > > 5. Holdover > > > > Temperature Sensor: > > DS1620 Rev D > > > > Jumpers: > > There is a 8 pin header (JP1) on the main board that would accept 4 > jumpers.. I haven't tried them but it is tempting to see what happens when I > enable them. > > > > > > //Sam > > > > ___ > > 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 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 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] Trimble/Nortel GPSTM (NTGS50AA) - working with Lady Heather.
There was some discussion in Dec 2011 regarding the Trimble/Nortel GPSTM (NTGS50AA) which fizzed out after it was mentioned that Lady Heather would not work with these units. I was undeterred and purchased some anyway. I have started playing around with these and have discovered that by asking it Sat status (0x10, 0x3C, 0x10, 0x03) at ~300ms intervals the unit will start streaming data after a few seconds. Once the Trimble is in this state Lady Heather detects the GPSDO and seems to work normally... Except the TC and DAMP fields which are reported as 0.0 and GAIN which is reported as -3.500 Hz/V (Tboltmon reports the correct values) I have read that this also happens with older Thunderbolts? I have written a small Windows app (available on request, off list) that sends the required packets to the GPSTM and by wrapping it in a batch file I have it opening Lady Heather once the unit is in the required state. (Only required once, or after running Tboltmon) Details of my 3, Trimble NTGS50AA's are: Firmware: App: 2.68 - 16 Dec 2004 GPS: 10.4 - 15 Dec 2004 GPS receiver has 8 Channels. Default disciplining parameters as reported by Tboltmon: Time Constant (sec): 100.0 Damping: 1.2 Ko (Hz/V) 1.20 Min Voltage: 0.0 Max Voltage: 6.0 Initial DAC Voltage: 3.00 Jam Sync Thresh (ns): 0.0 Max Freq Offset (ppb): 45.0 These GPSDO's uses the Trimble 34310 DOCXO which I think is the Vectron OC-050? There are 4 SMB RF connectors on the main board: 1. GPS Antenna Input 2. 10.000 MHz Output 3. 9.834 MHz Output 4. 0.5 Hz (Even Sec) PP2S Output. Unfortunately requesting the unit to output 1PPS does nothing. (yet) The 9.8304MHz output may be handy.. divided by 300 it's 32.768 KHz ;) Power Supply: The NTGS50AA requires 36-75 VDC (48V nominal) and has a on-board Lucent DC-DC converter to supply the required +/-12 and +5 volts. Serial Interfaces: Port A is RS-422 @19200 SCPI (available on the 110 pin connector on the main board) Port B is RS-232 @9600 TSIP (DB9 connector on Breakout board) LED indicators: There are 5 LED's on the breakout board that contains the DB9 connector. 1. Power 2. Not used, but switch-able via software 3. Not used, but switch-able via software 4. Lock 5. Holdover Temperature Sensor: DS1620 Rev D Jumpers: There is a 8 pin header (JP1) on the main board that would accept 4 jumpers.. I haven't tried them but it is tempting to see what happens when I enable them. //Sam ___ 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] WWVB test Sunday/Monday
Turn on your Tracor 599J's and K's *NOTICE*** *NIST Radio Station WWVB will be conducting a test of a phase modulation scheme beginning at 0130 UTC, Sunday 15 April until 1400 UTC, Monday, 16 April 2012. Most WWVB-controlled clocks and watches will be not be affected. Laboratory quality phase-locked and phase-tracking receivers may lose lock on the WWVB signal during the test. Questions and concerns regarding the test may be directed to the Broadcast Manager John Lowe, l...@nist.gov, or 303-497-5453. * * * ___ 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] Cisco ADP-30RB Power Supply Use with TBolt
Hello all, I have a couple of these supplies that I plan to use with the TBolt. From what I can gather from searches on the internet the RO pin between the two grounds on the power connector is a remote turn on which is enabled by grounding this pin. Would someone please confirm that for me? Thanks, Sam ___ 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] WWVB - Response to Question posed to John Lowe
I sent the following to John Lowe of the NIST regarding the WWVB change proposals. His comments follow. Dear Sir, I just read your whitepaper on the new modulation scheme proposed for WWVB. It seems that you and the other authors of this paper have addressed the concerns of people that use WWVB solely for use with wall clocks and the like. Have you done a study to see how the alteration of the modulation scheme will affect those users that use WWVB for frequency standardization with WWVB receivers like those manufactured by Tracor, Symetricom and the like? I am sure that you must be aware of the widespread use of these venerable receivers. Do you have solutions or a work around so that those products will remain useable? It seems that a huge percentage of time users get their time from their Cell or iPhone or even their internet connected computers. Few people I know actually have WWVB clocks.Those that I know have been happy with the way they work today. Many people do not even wear watches these days. We have already given up LoranC. I recently pulled my very expensive receiver out of the rack as it is now a useless paper weight. Why change something that has been working so well for frequency users for many decades? I know that everyone wants to push GPS but in my opinion it is prudent to have a back up plan. After all WWVL has been gone for many years. If WWVB makes this change there will not be a usable VLF service for frequency use. Is this change up for comment or is it a done deal? Sincerely, Sam H. Reaves III Response: Thank you for your comments. We are working on making an interface that will keep these devices operational. While it is true that there are WWVB frequency reference devices out there, no manufacturer has made or supported these devices in years. They are all considered obsolete by their own manufacturers. It is estimated that over 12 million radio receive clocks and watches have been sold in the US. The new scheme will allow new devices to be constructed that can receive the frequency also. I will add your name to my list to be contacted when we have a work-around. Thank you >> So I gather from this they are working on something, but no details were given. Sam ___ 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] Xtendwave
WWVB It seems that a commercial venture is driving this. Probably with all of the research at taxpayer expense. See: http://www.xtendwave.com/HD%20Time.pdf also www.extendwave.com ___ 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] WWVB Modulation Tests
Is there anyone that had a Tracor 599J or K on line when the new modulation test was going on? Does anyone know when the next test is to be performed? Sam ___ 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] WWVB New Modulation Scheme Compatibility
I guess that will mean that my bullet proof Tracor 599J will become a paper weight. I have a couple of units that were surplussed years ago from the USNO. Great receivers. Sam W3OHM ___ 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] Any TBOLT units for sale?
Does anyone have any Trimble Thunderbolt units for sale? Please reply off list. Sam W3OHM ___ 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] Symetricom CSAC
Hello, Does anyone have any experience with the Symetricom Chip Scale Atomic Clock? Seems interesting. http://www.businesswire.com/news/home/20110118005182/en/Symmetricom-Announces-General-Availability-Industry%E2%80%99s-Commercially-Available-Chip Sam ___ 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] HP5370
Hello Norm, Do you still have the HP5370 for sale? Thanks, Sam W3OHM ___ 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] FE5680A
Hello Group, I just bought four of the FE5680A's that have the standard configuration Pin 1+15, Pin 2 Gnd, Pin 3 Lock, Pin 4 +5V Pin 5 Gnd, Pin 6 1pps?, Pin 7 10MHz, Pin 8 TX, Pin 9 RX. I have a LED with a 330 ohm current limiting resistor on pin 3 (the 74ACT240 can sink up to 24mA and I am well below that) for the lock indicator. All of my units lock and produce 10MHz although the 1pps never switches. I can not get any of the units to communicate using the DB-9 connections. I scoped the receive data into the unit all the way to the microcontroller. The RS232 and TTL levels for the data look perfect as well as the timing for 9600-N-8-1. However the unit never transmits any data.I scoped this all the way to the micro as well. Not a pulse spike or anything. Has anyone determined what the second serial interface is for? It seems to me that it would not make any sense for FE to install the RS232 port if it could not be used. Any hints? Thanks Sam W3OHM ___ 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] VK4GHZ Thunderbolt Monitor and Commander
"Is the development system for netduino cross platform?" Yes although not as strait forward as using Windows. A quote from one of the Netduino developers says: "While we work out MonoDevelop IDE integration, we've created a Netduino C# bootloader which will allow you to manually compile your C# source on Mac/Linux...and then deploy your Netduino app via MicroSD card." My plan was to borrow code from the C# adaptation by Dan Quigley N7HQ of some Lady Heather code, before discovering that M1DST had a working example running already. I'm really looking forward to the day I can have a Netduino with Ethernet port and 4x20 OLED or VFD display on the front of my 2RU case that houses my Nortel/Trimble NTGS50AA. Ideally it would feature: NTP compatible time server. Log a Lady Heather compatible file to the on-board MicroSD card. RFC 2217 remote serial port over TCP. Web interface. Sam. - Original Message - From: Chris Albertson [mailto:albertson.ch...@gmail.com] To: Discussion of precise time and frequency measurement [mailto:time-nuts@febo.com] Sent: Tue, 28 Feb 2012 17:58:18 +1100 Subject: Re: [time-nuts] VK4GHZ Thunderbolt Monitor and Commander > On Mon, Feb 27, 2012 at 8:38 PM, Sam wrote: > > "Netduino is the Arduino with an Ethernet interface on it." > > > > Not quite, The Netduino is an open-source platform using the .NET Micro > Framework. > > Looks like you a right. To many things with name almost the same. > There are Arduinos with built-in Ethernet shields. That is what I > meant. My plan is to "borrow" some code from the NTP Palisades > driver and first build a Thuderbolt library for Arduino > > I'd be concerned that anything related to ".net" would forever tie you > to Microsoft. But in both cases the big things are that you don't > need to build a PCB or distribute programmed chips and using Ethernet > means you can see it from a web browser using a computer or phone > > Is the development system for netduino cross platform? > > > > - Original Message - > > From: Chris Albertson > > [mailto:albertson.ch...@gmail.com] > > To: Discussion of precise time and > > frequency measurement [mailto:time-nuts@febo.com] > > Sent: Tue, 28 Feb 2012 > > 15:22:49 +1100 > > Subject: Re: [time-nuts] VK4GHZ Thunderbolt Monitor and > > Commander > > > > > >> On Mon, Feb 27, 2012 at 8:04 PM, Sam > wrote: > >> > I have known about this project for a while, I was excited at first but > >> was put off by the price tag, > >> > the fact that it is closed source and that it's not available as a kit. > >> > > >> > There is another project on the horizon by James M1DST that is based on > >> the Netduino platform which will be open source. > >> > >> > >> Why does everyone think alike? This describes what I want to do also. > >> Netduino is the Arduino with an Ethernet interface on it. It makes > >> a good platform for this because there is no need to make a PCB or > >> distribute a "kit". The Arduino already has all the required > >> connectors. > >> > >> > >> Chris Albertson > >> Redondo Beach, California > >> > >> ___ > >> 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 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. > > > > -- > > Chris Albertson > Redondo Beach, California > > ___ > 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 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] VK4GHZ Thunderbolt Monitor and Commander
"Netduino is the Arduino with an Ethernet interface on it." Not quite, The Netduino is an open-source platform using the .NET Micro Framework. http://www.netduino.com The Netduino Plus shield has on-board Ethernet. http://www.netduino.com/netduinoplus/ Sam - Original Message - From: Chris Albertson [mailto:albertson.ch...@gmail.com] To: Discussion of precise time and frequency measurement [mailto:time-nuts@febo.com] Sent: Tue, 28 Feb 2012 15:22:49 +1100 Subject: Re: [time-nuts] VK4GHZ Thunderbolt Monitor and Commander > On Mon, Feb 27, 2012 at 8:04 PM, Sam wrote: > > I have known about this project for a while, I was excited at first but > was put off by the price tag, > > the fact that it is closed source and that it's not available as a kit. > > > > There is another project on the horizon by James M1DST that is based on > the Netduino platform which will be open source. > > > Why does everyone think alike? This describes what I want to do also. > Netduino is the Arduino with an Ethernet interface on it. It makes > a good platform for this because there is no need to make a PCB or > distribute a "kit". The Arduino already has all the required > connectors. > > > Chris Albertson > Redondo Beach, California > > ___ > 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 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] VK4GHZ Thunderbolt Monitor and Commander
I have known about this project for a while, I was excited at first but was put off by the price tag, the fact that it is closed source and that it's not available as a kit. There is another project on the horizon by James M1DST that is based on the Netduino platform which will be open source. http://m1dst.co.uk/ I have spoke to James via Email and the project is further ahead than what is published on his site. Direct links for the VK4GHZ Thunderbolt Display. http://www.vklogger.com/forum/viewtopic.php?f=71&t=10282 http://www.vklogger.com/forum/viewtopic.php?f=71&t=10277 Sam. - Original Message - From: Peter Gottlieb [mailto:n...@verizon.net] To: time-nuts@febo.com Sent: Tue, 28 Feb 2012 14:26:09 +1100 Subject: Re: [time-nuts] VK4GHZ Thunderbolt Monitor and Commander > One has to go through their sign-up process just to take a look. > > > > On 2/27/2012 10:20 PM, James Robbins wrote: > > Just wanted to mention a terrific Thunderbolt Monitor design by VK4GHZ > Adam > > Maurer (http://www.vklogger.com/forum). It monitors the Thunderbolt > output on > > 4 screens (4x20 display) so no computer hookup is necessary to follow the > > GPS. A companion "Commander" makes use of a PICAXE to cause the > Thunderbolt > > to initiate various functions such as a survey or change from 3D to over > > determined, among others. Adam sells the Monitor unit assembled and > tested, > > while the Commander is easily "home brewed". He's done a great job. > > > > Jim Robbins > > N1JR > > > > ___ > > 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. > > > > > > - > > No virus found in this message. > > Checked by AVG - www.avg.com > > Version: 10.0.1424 / Virus Database: 2113/4836 - Release Date: 02/27/12 > > > > > > ___ > 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 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] Any spare switches for Racal-Dana 1992?
There is a thread at http://www.eevblog.com/forum/product-reviews-photos-and-discussion/racal-dana-1992-teardown/ that has some detailed pictures of the innards of the switches, by the look of them a rubber keypad repair kit should work. http://parts.digikey.com/1/parts-kws/conductive-rubber-keypads-repair-kits Sam ___ 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] Morion MV89A pics
Thanks for the pictures Scott, it was interesting to see under the shell of these. I wasn't expecting the inside to look so "hand made". At 02/13/2012 04:53 AM, Scott Newell Wrote: > If that's actually the inner oven, where's the outer oven? I don't > see any heated components in contact with the outer shell that I > pulled apart. I think what we see in the pictures is the outer oven. It looks like there are 6 pins running into it via the main PCB, more than enough to run the inner oven and oscillator. regards, Sam ___ 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] Morion MV89 output level?
If you do open it up Scott, Don't forget to take some photos of the guts of it. I wouldn't mind seeing inside one of these. Sam ___ 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] Morion MV89 output level?
I just powered up one of my MV89A's and measured ~7 dBm into my HP 8920B, but as Tom has mentioned some MV89A's develop a dry joint around the output bypass capacitor http://www.hellocq.net/forum/showthread.php?t=283551 What is the date and revision number on yours? I have 2 here 07/34 and 07/31 both Rev 3 bought from fluke.l Sam > Got my replacement FE-5680 and a MV89 in from Nichegeek. I figured > I'd better power up and check the MV89 before I let 'em know > everything was ok. The MV89 is warming up nicely, the current is > down to 290 mA (and still dropping), but the output seems low; about > 40 mV RMS as measured on a scope with a 10Meg 10x probe. (Datasheet > spec is +7 +/- 2 dBm.) The output is too weak to reliably trigger my > 5345A counter. > > The reference voltage measures 4.90 VDC. > > If anyone can make a quick measurement on their MV89, I'd appreciate it. > > > thanks! > newell N5TNL > > > ___ > 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 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 digital broadcast TV for timing?
You might be able to find the PCR clock at 90kHz, but.. PCR clocks are usually just decent oscillators, nothing special. > GPS requires a good view of the sky, Hard to do in say the 7th floor > of a 40 story building if you have no windows. I'm wondering about > using the new digital TV signals for timing. > > I'm pretty sure there is time code in the signal and I'm pretty sure > the bits are clocked at a very accurate rate. Also TV receivers are > very easy to find and put "hooks" into. I'd bet the broadcast TV > signal could be almost as good as GPS. > > The plan is to try and phase lock a local oscillator and use a very > long time constant on the loop filter. I bet the TV transmitters are > locked to GPS and over a long enough time are as good as GPS. Also in > many cities there are many TV transmitters, should be able to take > advantage of that. > > Before I try some experiments anyone want to tell me why I'm wrong? > -- > > Chris Albertson > Redondo Beach, California > > ___ > 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 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] Brutal 5680 autopsy
Just came across another FE-5680A tear down video, this one is gets right down into the RF cavity and lamp assembly. While I was watching the video, I was thinking you could fix that.. ohh.. too late.. Unfortunately for this Rb, it gets ultimately destroyed! Didn't someone need a dead 5680 to draw a schematic diagram? I know where there might be one.. http://www.youtube.com/watch?v=ymV9LwhD0W0 Sam. ___ 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] TM 5680-0211 for 5680A series Rubidiums
In the interim, here is a translation of the Russian manual. http://translate.google.com/translate?hl=en&sl=ru&u=http://morion.com.ru/uploaded/FE-5680_manual_rus.pdf Sam. - Original Message - From: paul swed [mailto:paulsw...@gmail.com] To: Discussion of precise time and frequency measurement [mailto:time-nuts@febo.com] Sent: Wed, 01 Feb 2012 13:29:48 +1100 Subject: Re: [time-nuts] TM 5680-0211 for 5680A series Rubidiums > Stranger still. I never received the first email and am interested. > Regards > Paul. > > On Tue, Jan 31, 2012 at 9:15 PM, Ray Xu wrote: > > > Same here, rayxu...@gmail.com > > > > Thank you > > Ray Xu > > > > On Tue, Jan 31, 2012 at 7:59 PM, Chris Albertson > > wrote: > > > > > > On 31/01/12 22:14, Rob Kimberley wrote: > > > >> > > > >> If anyone is interested, I have just got hold of a PDF of the > > Technical > > > >> Manual TM 5680-0211 for 5680A series Rubidiums. > > > >> Please contact me off list for a copy (1M, so too large to post on > > > >> time-nuts@febo.com) > > > > > > I'd ask off line but the quotes did not preserve your email address. > > > Would you send a copy to me at albertson.ch...@gmail.com > > > > > > If you like, I can put this some place where others can get get directly > > > > > > Chris Albertson > > > Redondo Beach, California > > > > > > ___ > > > 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. > > > > > > > > > > > -- > > __ > > 73, Ray Xu > > KF5LJO > > ___ > > 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 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 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] Optimax CA-1008 anyone?
Sounds like a CATV amp, Maybe the datasheet from the CA2600 would help? I have a TRW CA2600 here and the dimensions you specified are the same. http://www.datasheets.org.uk/dl/Datasheets-8/DSA-152713.pdf ___ 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] Wrist Watch for Time Nuts
CR2032, expensive at the store but cheap online: http://www.dealextreme.com/details.dx/sku.751 Good value even if 75% of them are poor (which is unlikely). > -Original Message- > From: time-nuts-boun...@febo.com > [mailto:time-nuts-boun...@febo.com] On Behalf Of Robert Darlington > Sent: Thursday, 25 February 2010 2:34 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Wrist Watch for Time Nuts > > Which means a battery every month for somebody actively > developing projects that talk to wireless sensor networks. > Still not a bad deal. > > -Bob > > On Wed, Feb 24, 2010 at 8:08 AM, paul swed > wrote: > > > That is indeed neat. > > Just no time for another project to tinker with. > > $49 quite the deal > > Whats funny is it eats a battery at least every 6 months > for average use. > > "Warning: The information contained in this email and any attached files is confidential to BAE Systems Australia. If you are not the intended recipient, any use, disclosure or copying of this email or any attachments is expressly prohibited. If you have received this email in error, please notify us immediately. VIRUS: Every care has been taken to ensure this email and its attachments are virus free, however, any loss or damage incurred in using this email is not the sender's responsibility. It is your responsibility to ensure virus checks are completed before installing any data sent in this email to your computer." ___ 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 wants to know: How big is your tube?
> -Original Message- > From: time-nuts-boun...@febo.com > [mailto:time-nuts-boun...@febo.com] On Behalf Of Russell Rezaian > Sent: Friday, 16 October 2009 12:52 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Lady Heather wants to know: How big > is your tube? > > Most common screen resolutions for me: > > 4x3 aspect ratio: > 1280x1024 > 1600x1200 > For square pixels, this first one is actually a 5x4 ratio used commonly in non-widescreen LCDs. CRTs tended to all have 4x3 apect ratios and hence for a horizontal resolution of 1280 the "square-pixel correct" vertical resolution is 960. Sam. "Warning: The information contained in this email and any attached files is confidential to BAE Systems Australia. If you are not the intended recipient, any use, disclosure or copying of this email or any attachments is expressly prohibited. If you have received this email in error, please notify us immediately. VIRUS: Every care has been taken to ensure this email and its attachments are virus free, however, any loss or damage incurred in using this email is not the sender's responsibility. It is your responsibility to ensure virus checks are completed before installing any data sent in this email to your computer." ___ 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 GPS Signals
> F0 is 10.23 MHz. > > Björn On earth. In the birds it's 10.22999999543 MHz. Sam. Disclaimer : The contents of this e-mail including any attachments are intended only for the person or entity to which this e-mail is addressed. If you are not, or believe you may not be, the intended recipient, please advise the sender immediately by return e-mail, delete this e-mail and destroy any copies. The Company does not warrant nor guarantee that this email communication is free from errors, virus, interception or interference. ___ 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] What's the time Mr Wolf...
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Steve Rooke Sent: Thursday, 30 October 2008 11:16 PM > 10) If they are geostationary, or move in relation to the ground, > how are the affects of the Einstein time dilation handled as they > may be travelling at a different speed than a point on the surface > of the Earth? Internally, the GPS satellites have an approximately 10.23 MHz oscillator which is: 1. multiplied by 120 to generate the L2 carrier (1227.6 MHz), 2. multiplied by 154 to generate the L1 carrier (1575.42 MHz), 2a. Multiplied by 115 to generate the L5 carrier (1176.45 MHz, Block III sats only) 3. passed directly to the P(Y) code generator (10.23 MHz symbol rate) 4. divided by 10 to generate the C/A code (1.023 MHz symbol rate), and 5. divided by 20460 to generate the data (50 Hz bit rate). So everything is derived from this oscillator, which is actually 10.2299543 MHz. This -4.57 mHz corrects for relativistic effects. Sam. Disclaimer : The contents of this e-mail including any attachments are intended only for the person or entity to which this e-mail is addressed. If you are not, or believe you may not be, the intended recipient, please advise the sender immediately by return e-mail, delete this e-mail and destroy any copies. The Company does not warrant nor guarantee that this email communication is free from errors, virus, interception or interference. ___ 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-zones and World time..
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Steve Rooke > When I communicate with the US, I have to work out which time-zone the place I'm talking to > is in and correct for that. It's probably not so much of a problem for someone in America > as you get used to the time-zone differences but this adds complexity for an outsider. > I just wondered if it would add global communications and buisiness to have a single World standard. When most people communicate with other time zones it's via telephone or email, and when they calculate the destination local time, it's to answer the question "Are they likely to be awake?" or "Are they more likely to be at work or at home?". Having a global time won't solve this problem, you will still have to do the conversion to find out the local time to answer these questions. If you're scheduling radio comms then the Military probably have the correct approach - Zulu time for everything. Sam. Disclaimer : The contents of this e-mail including any attachments are intended only for the person or entity to which this e-mail is addressed. If you are not, or believe you may not be, the intended recipient, please advise the sender immediately by return e-mail, delete this e-mail and destroy any copies. The Company does not warrant nor guarantee that this email communication is free from errors, virus, interception or interference. ___ 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] Thunderbolt
Count me in for one. Sam W3OHM ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
[time-nuts] HP5372
Hello, I just acquired a HP5372A Frequency and Time Interval Analyzer. When I power it up I get the following error: Error 160: Out of sensitivity cal. I am currently downloading the manuals but I'm sure that someone on time-nuts has seen this error and know what it takes to fix this. Any ideas folks? Thank you, Sam W3OHM ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
