> Do read the article in question. You would love to see the graphs and
> texts. It's quite readable.
>
> The SPS produces 400 GeV/c protons which is extracted by a kicker magnet
> in two 10,5 us long bursts, 50 ms apart. See page 4 of 1109.4897v1.
>
> http://arxiv.org/abs/1109.4897
>
> Contol i
> Hello,
>
> I use TimeLab and the HP5370B and a Prologix GPIB interface.
> After making several 10 Hr runs with the same oscillator I noticed
something
>
> When laying the successive runs on top of each other there are little
blips
> and bumps that line up perfectly on top of each other.
> For
> As I tried a test using my Anritsu spec I got strange results.
>
> The following happened:
> I didnt connect any signal source to get the noise of the instrument only
> and set the carrier to 425MHz. As signal strenght I put in -140dBm
> and connected a 50Ohm dummy resistor to the instruments i
> Hi group,
> just got a Prologix LAN interface and tried to get some
> printouts from my Anritsu MS6804A but it didnt works.
> Phase Noise & Spectrum Surveillance prgs works fine
> but 7470.exe allways tells me "communication error 0x02"
> when I request a plot.
> Communication to the Anritsu work
> 64 bit Windows 7 is the most restrictive OS I have seen so far in terms of
> drivers. 32 bit is a bit more forgiving. I would *guess* that 32 bit
Windows
> will be a bit of a dinosaur three to five years from now. Just as you are
still
> running Win 98, that does not mean other versions will be d
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Rick Karlquist
> Sent: Friday, October 07, 2011 9:32 PM
> To: Discussion of precise time and frequency measurement
> Subject: [time-nuts] Measuring short term stability minus linear
> Very Important note, The above is NOT available directly from
> LadyHeather's
> ADEV plots (at least not yet - Mark is a revision coming?),
> What one needs to do is to log the Tbolt's Freq and Phase data at the 1
sec
> rate and then use that data with an external ADEV program such as Ulrich's
> For a handy list of cheap fpga boards:
>
> http://tristesse.org/CheapFPGADevelopmentBoards
>
>
> I notice he's recently added the SOIO to the list. I've had my eye on that
> board as well for a while. If all you want is say 20 odd counters as you
> mentioned, then that even fits in the cheapes
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Paul A. Cianciolo
> Sent: Tuesday, October 04, 2011 3:57 PM
> To: 'Discussion of precise time and frequency measurement'
> Subject: [time-nuts] Sorry wrong title on previous message
> But does anyone have comments on the meter approach HP suggested.
> I really need to understand whats semi normal for old tube.
> I suspect I may be sitting near the noise floor of the system.
You've checked the 5060A manual to see if they give noise-floor test
details, correct?
> As for the n
> Thanks John. I moved the OCXO edge about 100 usec after the GPS 1PPS
> and now I can use the +T1 mode. It just seemed more "natural" to try to
> line up the edges.
>
> From your response I am going to assume that the behavior I observed is
> in fact normal and my 5370B is OK?
Sounds like it.
> > If I put the 5370B in the +/-TI mode I expected to see both + and -
small
> > time differences when the two signals are closely aligned - and mainly
I
> > do. Typically the difference is + or - a usec or less. Occasionally
> > however the 5370B displays very near to a +1 or -1 second (999.9
> As long at there is always a positive or always a negative time
> difference between the two 1 pps signals the result makes perfect sense.
> There appears to be about a 2 to 3 usec jitter in the 1pps from the
> GPS (this is expected given the design of the receiver).
>
> If I put the 5370B in
> >Hello,
> >
> >It is here: http://www.testequipmentplus.com/LCD85662H.html
> >
> >Regards,
> >
> >Javier
>
> But, as others pointed out in hp_agilent_equipment group, the
> replacement LCD lacks the resolution of the original vector-graphic CRT.
It does (I have one), and that's a bit of a shame
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Magnus Danielson
> Sent: Thursday, September 22, 2011 5:37 AM
> To: time-nuts@febo.com
> Subject: [time-nuts] HP5062C connector pinouts
>
> Fellow time-nuts,
> I am in nee
> My measurement technique is from Stanford's own application note.
>
> The two 10 MHz are fed to Ch A and B. The measurement is a time interval
> gated at 1 kHz from the SR620's ref out.
>
> So we make 1000 measurements per second.
>
> So the one shot 25 ps SR620 spec is reduced by square root
>
> I have a z3801 and trying to use the 1 PPS from the rear panel for the
start
> input of an HP5370B
> This approach seems to work fine until a load is either added or turned
off
> on the same AC circuit or a nearby circuit.
>
> At which point the hp5370 takes a hit and a trace that had been ru
For the best performance you might look at using the divider from an ADF4001
or 4002, but with a mixer instead of the CMOS phase detector. That way you
wouldn't be in the position of feeding 10 MHz to a digital comparator that
would really prefer to see a faster edge. If the 1/f noise of the ADF4
Here's the Windows shortcut that my dedicated laptop normally uses:
"C:\Program Files\Heather\heather.exe" /ip=localhost:45000 /f /vm /gm /go
/ga /T=-7PDT /y /y /x=1000 /tw=25
These options are decipherable by running heather /?, but basically, in
order of appearance, they do the following:
> Trying to run LH2 with a TBolt under WinXP. I need to change her com port
to 3,
> which is where my serial-to-USB adapter is located -- and port 1 is in
use.
>
> I see in the "tip" sheet that I can use the command line. Trouble is, I
can't find
> it. Hitting most keys will display a menu of lett
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of John Petrich
> Sent: Wednesday, September 07, 2011 4:54 PM
> To: time-nuts@febo.com
> Subject: [time-nuts] Symmetricom OCXO ID
>
> I know this is one of those questions: I am tryin
> I was playing with an Agilent 53132 counter, and noticed that
> it measures "standard deviation" but doesn't seem to offer
> what everyone really wants, ie, Allan deviation. According
> to the textbooks, standard deviation won't work for oscillators
> because the mean is not fixed and the deviat
> John,
>
> I don't know if I am going to understand all this.
> I come from an analog world, a dinosaur, all this timing stuff as much fun
> as it is, can be awful intimidating.
>
It only gets weirder from here!
> I am thinking there is a 1 PPS source in the Z3801a but for the moment I
> hav
> 1) UnderFunction
> The counter is in the "TI" mode
>
> 2) Under statistics mode
> The counter is in the "Mean" mode
>
> 3) Under Sample Size
> Number "1" is selected
>
> 4) Under arming
> The "+TI" button is selected.
>
> 5) Under display rate.
> Fully clockwise the display nor the GP
> Right, the averaging time, tau, is critical when quoting ADEV
> numbers. In fact, the key feature of any ADEV plot is seeing
> how stability changes as a function of tau. But Mark mentioned
> "at 100 seconds" so that allowed me to compare his single
> ADEV number against the tau 100 second column
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Heinzmann, Stefan (ALC NetworX GmbH)
> Sent: Sunday, August 21, 2011 8:56 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Regarding time lab a
> The NI communicator tells me that the IDN command was sent but no
> response.
> BUT If I press the read command I a return from the counter that
> corresponds
> to the reading on the counters LED display .
Most likely, that just means that your counter is set to Talk Only mode. It
won't respon
> Folks,
>
> I just found in my pile of stuff a Wenzel Associates Quartz oscillator.
> Model # 500-03490D This is a 10 MHz ocxo that was in an old Central
Office
> clock module
> I have spent the last hour or so searching with different search engines
but
> no info can be located.
>
> The oscill
> On that subject, what do you use for that?
>
> Personally I do something like this:
> - pdftohtml
> - index the html pages with mnogosearch
> - dump on server
> - the pdf's are now searchable through a web interface (and from command
> line obviously)
>
> This works fine for pdf's that have emb
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of paul swed
> Sent: Friday, August 05, 2011 5:45 PM
> To: Tijd Dingen; Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Marrisons 1948 article
>
> Indee
Nice... these are now hosted on a blazing-fast Akamai pipe. Ladies and
gentlemen, start your wgets!
-- john, KE5FX
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Poul-Henning Kamp
> Sent: Friday, August 05, 2011 2:09 PM
> To: t
> Hi John:
>
> Very interesting. I wonder if it's something that can be observed in a
> home system?
> I've got some radioactive samples and various counters that detect their
> particles as well a precision time equipment.
> http://en.wikipedia.org/wiki/Radioactive_decay#Changing_decay_rates
>
> Now all this is fine, and somewhat amusing, but it's not clear there is
any
> particular advantage. It's not as though there are piles of 5370s lying
around
> with dead or missing CPU cards. Or that it's impossible to deal with HPIB
> anymore. One interesting possibility is adding new front-panel
> Ok, I have a dds receiver locked to a gpsdo, the radio can only be tuned
in 1
> hz increments but should be dead on. I can feed the passband into speclab
> via VAC and measure a carrier OTA. No problem there...can get decent
> resolution but there is some uncertainty with regard to the dds (fre
The C. S. Stong 'Amateur Scientist' anthology included a 110V 60 Hz
telescope-tracking drive generator project that used a reversed filament
transformer. It was a bleeding-edge design for the time, using a CK722 Wien
bridge oscillator (complete with HP-style pilot lamp AGC) and a couple of
early g
Current-generation CSACs work like rubidium standards, and perform similarly.
The optical excitation comes from a laser diode rather than a conventional Rb
vapor lamp. They can't be considered primary standards.
Compare the ADEV graphs of some of the 'classical' Cs standards with what you
can
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Ulrich Bangert
> Sent: Tuesday, June 21, 2011 4:37 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] DDS'ery
>
> Clever! At least for your sp
> > to provide SFDR up to 150 dB (and I'd notice it if I were
> > getting much less than that in practice.)
>
> has pushed me up! When I tell the compiler to generate me a 150 dB SFDR
> DDS
> then it produces an block with 28 (!) bits output witdh for the DAC. So, I
> am asking myself what wonder-
Correct, CORDIC doesn't require a multiplier, only adds and shifts. That's
the whole idea.
-- john, KE5FX
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of li...@lazygranch.com
> Sent: Monday, June 20, 2011 5:24 PM
> To: Discussio
I'm not familiar with Altera's DDS options, but I will say that Xilinx's DDS
compiler is superb. It can be configured to provide SFDR up to 150 dB (and
I'd notice it if I were getting much less than that in practice.)
As Javier hinted, the reason you can't use the MSB directly is that its
transit
Not even remotely. Try it.
-- john, KE5FX
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
> boun...@febo.com] On Behalf Of Poul-Henning Kamp
> Sent: Monday, June 20, 2011 8:04 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nu
I took a look at these boards at the IFCS/EFTF show a couple of weeks ago,
actually. Nice boards, but at $11,000 each they seem to be aimed at users
who would otherwise be looking for a new Wavecrest-class analyzer.
-- john, KE5FX
-Original Message-
From: time-nuts-boun...@febo.com [mai
How about a CSAC? Those pretty much are rubidium clocks, only with cesium
vapor.
-- john, KE5FX
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Rob Kimberley
Sent: Monday, May 23, 2011 1:32 AM
To: 'Discussion of precise time and freque
> -Original Message-
> From: Brooke Clarke [mailto:bro...@pacific.net]
> Sent: Sunday, May 01, 2011 7:09 AM
> To: time-nuts@febo.com >> Discussion of precise time and frequency
> measurement
> Cc: John Miles
> Subject: Re: [time-nuts] Lady Heather calen
>
> Yes, Lady Heather has some rather extensive calendar functions
> built in, including a list of common (and not so common)
> holidays. If the file heather.cal is found, it uses that file
> for the holidays... you can add your own or delete some.
> Otherwise it uses the built in list. I
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]On
> Behalf Of J. L. Trantham
> Sent: Friday, April 22, 2011 3:34 AM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] Fix Trimble Oscillator??
>
>
> John,
>
> P
> > jmi...@pop.net said:
> > > I can confirm that the whole oscillator including oven runs
> on 12 volts.
> > > However, you do have to connect two different pins to +12 and
> > two different
> > > pins to ground to make it work (see attached). ...
> >
> > Nice pictures/graphs. Thanks.
> >
> > W
> jmi...@pop.net said:
> > I can confirm that the whole oscillator including oven runs on 12 volts.
> > However, you do have to connect two different pins to +12 and
> two different
> > pins to ground to make it work (see attached). ...
>
> Nice pictures/graphs. Thanks.
>
> What's the spike at 6
>
> Javier Herrero wrote:
> > Hello,
> >
> > I will need to measure the phase noise of a 35MHz oscillator in the
> > range of 1 to 100Hz (well... and also at a higher range but this is no
> > problem), and I would like to know about the different alternatives. I
> > would like not to have to mess
> Hi,
> I am boxing up my LPRO rubidium source in a steel box. The device is
> to be thermostated
> by controlling a small fan outside the box to keep the LPRO at about
> 40*C.
> Although the unit is in a mumetal box I assume there may be some
> penetration of earths magnetic field.
> The steel bo
Bob may be going somewhere with this. Let's give him a bit more rope. :)
-- john, KE5FX
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]On
> Behalf Of Rex
> Sent: Saturday, March 26, 2011 3:20 PM
> To: Discussion of precise time and frequency
That's my vote as well. Can do it, have done it, will do it again, but only
for things that are interesting enough to spend the time on. In other
words, no, I would not build a kit that replicated functionality available
in cheap surplus gear and was not otherwise technically interesting.
For in
I liked this part:
"Initially, the intent was to use the MSBOUT (Most Significant Bit) output
pin as the LO source. This would have been great since the output is
TTL-leveled, exactly what the SLM phase detector is designed to work with.
Unfortunately, this MSBOUT signal is not a clean square wave
The remote shortcut is not in the 'shipping' 2.0 version at
http://www.ke5fx.com/heather/setup.exe but it's present in the current 3.0
beta at http://www.ke5fx.com/heather/beta.exe .
-- john, KE5FX
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]
> Ok some cool advice - this thread is an interesting thought exercise. I'm
> going to think about it a some more, but it seems, in comparison at least,
> the loose phase-lock technique remains the simplest. Provided you have a
> low-frequency spectrum analyser handy.
It would be a better idea fr
Sorry, thought that was going off-list. The offer stands to anyone else who
might have any -60109 parts they want to get rid of. :)
-- john, KE5FX
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]On
> Behalf Of John Miles
>
Hi, Bert --
If there's a 10811-60109 OCXO, I'd be interested in buying that from you in
the $100 neighborhood.
-- john
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]On
> Behalf Of ewkeh...@aol.com
> Sent: Friday, February 25, 2011 4:54 PM
> To
Having done some early prototype testing on this upcoming amplifier (no
financial involvement) I'll suggest that it may be worth waiting for. The
isolation at 10 MHz is better than 90 dB, the PN floor is better than -170
dBc/Hz, and the cost will -- as usual for TAPR -- be much less than what
othe
Nice scan, thanks! Same edition as David Kirkby's earlier scan, but with
full-page foldouts. This one goes on the iPad for sure.
-- john, KE5FX
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]On
> Behalf Of Roberto Barrios
> Sent: Tuesday, Feb
> I've been looking at this a bit recently.
> Pictures here: http://jks.com
Cool as heck!
> The next step is to move everything to a microcontroller (e.g.
> SAM7X) on a card that replaces the processor board completely.
> As has been mentioned you can do all sorts of crazy, and perhaps
> useful,
Also on the subject of Cs reference service manuals, Artek is looking for a
copy of the HP 5061B service manual to scan. If anyone can help, you'll get
your original back plus two free manual CDs of your choice. Contact Dave at
manuals (at) artekmedia.com if interested.
-- john, KE5FX
riginal is spoken for.)
-- john, KE5FX
> -----Original Message-
> From: John Miles [mailto:jmi...@pop.net]
> Sent: Tuesday, January 25, 2011 11:46 AM
> To: Discussion of precise time and frequency measurement
> Subject: RE: [time-nuts] NATIONAL RADIO NC-2001,2011 CESIUM BEAM MANUAL
> Here is a simple question: Why should I try to get an HP 5372A
> (or 5371A)? What
> are the benefits over the 5370A? Worth spending?
The 5370A/B is nice because its one-shot resolution is better than any other
HP/Agilent counter, prior to the release of the 532xxA models a few months
ago. Also,
> Whilst the close in phase noise of the ADC used in the TSC5115 may be
> comparable with that of a 74AC04 the phase noise floor of such ADCs is
> degraded when clocked by a 74AC04...
> In particular such ADCs have been be used to measure the jitter of
> various logic families by using devices fro
>
> Before one can conclude such a solution is adequate one needs to know
> the ADC requirements for clock jitter.
> If the ADC is a high resolution pipelined ADC like those available from
> AD and LTC then such a solution will degrade the performance
> significantly.
> These ADCs require clock cy
I think that's what it was called, yes. There was a console version and a
GUI version, both closed-source. Hopefully they also provide a linkable
library by now; that's what you'd want to ask about.
The Xylo board I was looking at didn't have a large EEPROM attached to its
USB chip, so the loade
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]On
> Behalf Of Don Latham
> Sent: Saturday, January 29, 2011 11:13 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] counter
>
>
> Aha. good to know. Do you sup
>
> With regard to the home-brew counter project, if it still exists:
>
> >From friend Marcus Leech on another list:
>
> "Don't know whether you've seen these:
>
> http://www.knjn.com/ShopBoards_USB2.html
>
> $79.95 for the low-end board, which includes and FX2, and a small
> Cyclone FPGA. Pretty
C'est moi. I wanted a chance to scan it before it's lost forever in the
tubes. I'll relist it as soon as I'm done (or someone can just buy it from
me for the same price.) Would be nice if the original eventually finds a
home with an NC-2001 or -2010.
The manual would probably be of some interes
>
> On 01/22/2011 11:31 PM, paul swed wrote:
> > Well pretty interesting late afternoon.
> > The oscillator works but C-11 definitely is troubled. Additionally a key
> > element is an effective ground. Bridge the low side of the ampule to a
> > better ground and the oscillator seems to reliably st
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]On
> Behalf Of Tom Holmes
> Sent: Tuesday, January 18, 2011 4:43 PM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] Symmetricom CSAC is Cs acting like a Rb un
No, not at this time. It would take a lot of hacking.
-- john, KE5FX
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]On
> Behalf Of paul swed
> Sent: Tuesday, January 18, 2011 2:18 PM
> To: Discussion of precise time and frequency measurement
>
... over at Bunnie Huangs blog:
http://www.bunniestudios.com/blog/
Anyone recognize it? It almost has to be a timing receiver of some kind.
-- john, KE5FX
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cg
> >> For prescaling, I'd suggest using the dividers in one of the Analog
> >> Devices
> >> PLL parts (ADF4xxx) instead of Hittite chips. Many of the AD parts can
> >> still be purchased in packages with actual pins, and you can always get
> >> them
> >> in small quantities. They will also take a
Not much -- I just increased the stack space in an effort to fix (or at
least track down) an issue I'm seeing on one machine here. Also renamed the
desktop shortcuts to clarify that one will access a remote unit and the
other will access a local unit on COM1.
-- john, KE5FX
> -Original Messa
> > I am currently playing around with some designs in a spartan-6 and a
> > spartan-3e. The spartan-6 design has more promise resolution
> wise, but it
> > is also not very hobby friendly (bga package). So if this is ever to be
> > built using hobby level soldering skills it will be spartan-3e. T
> > What GPIB data rate did you actually get for the 10 kHz trace?
> > When JohnM ran the same test on my 2070C it was closer to
> > 0.74 s instead of 1.0 s. I'm wondering if you found a way to
> > get your DTS pacing more accurately.
Note that Magnus is running a very different test -- I was sel
> Fellow clock-tickers,
>
> I'm finally starting to learn microcontrollers, and have
> selected Atmel's AVR line as my tool of choice. I've also
> discovered the Arduino site, and am starting to learn their IDE as well.
>
> My first goal will be an open-source/open-hardware IRIG-B
> de
hese measurements usign an R&S ESU-40 measurement receiver. Do you know
> how good would this unit perform as a measurement receiver?
>
> Regards,
>
> Javier
>
> El 11/12/2010 04:21, John Miles escribió:
> > It's neat -- not a substitute for the big HP iron, but sti
> Hi Don.
>
> I'm ultra curious of how they did it. How did they covered the
> full BW they have.
> Did you looked inside, or did they sent a block diagram?
> (...I was born curious... it is not a new symptom!)
Page 27 of their manual at http://www.signalhound.com/manual.pdf has a block
diagram.
It's neat -- not a substitute for the big HP iron, but still a very capable
tool. The first few they sold were less expensive, but I think it's still a
nice piece of gear for $1K. Good bang:buck ratio.
-- john, KE5FX
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-n
> No, actually to feed a bunch of synthesizer chains (for which the sine
> wave will work fine) and to drive sampling clocks on ADC/DAC (for which
> one wants a low jitter square wave).
>
> A digital radio...
There are some nice residual plots for AC and CMOS chips at
http://www.xs4all.nl/~martei
> Recently I bought a Efratom Ru frequency standard from eBay and a
> frequency divider chip that makes 1MHZ,100KHZ,25KHZ,10KHZ,100HZ and a
> 1HZ output. Today I thought of a way to make a nice 60HZ so you can use
> a mains-powered clock for the display (using amplifier and transformer
> wired "ba
The Wenzel diff-amp circuit is OK but it will run out of steam before 100
MHz unless you use different transistors. On the other hand you really have
to go out of your way to corrupt the signal at the -125 dBc/Hz level. At
that level of play any decent comparator with the necessary slew rate will
> I just installed this update, and find that the "/g/" command ([turn
> off] RMS info) does not seem to work. If it is passed by the
> shortcut at launch time, only the Help for Command Line Options
> launches (not LH itself). If I try to invoke it from within LH, I
> get an "Unknown command li
> I echo Bob's thanks to the authors of this invaluable program.
>
> I like to have the satellite path display to the right of the graph
> panel, but haven't managed to set the configure file to do that
> automatically, and always have to issue the gb and gm commands after
> running the program -
Note that the 'KE5FX Thunderbolt' link that gets installed with the LH 3.00
beta is a remote connection to *my* Thunderbolt, which is set up to test the
TCP/IP networking code in Heather.
This is not a "production" device so it is OK to mess with it (or reset it
altogether)... but if you set it to
I
> switched my
> EZGPIB communication completely from EOI to EOS. Even the instruments that
> do not serve the EOI line correct seem to send a correct string
> termination
> as or .
>
> 73s de Ulrich, DF6JB
>
> > -Ursprungliche Nachricht-
> > Von: t
I'm looking at writing some code to drive the DTS 2070, but have been
running into timeout errors performing any GPIB query (even *IDN?) while the
instrument is taking measurements, even in sizes/sets of 1/1 at a 1-pps
rate. Has anyone else run into this before?
This happens equally with either a
> PM sent with the K23 DC blocking filter manual.
> I'll scan the K21 AM detector filter, too.
It hasn't shown up -- it might've been too big to email. Anything over a
couple MB should go to jmiles (at) gmail.com, with a note to jmiles (at)
pop.net to let me know you sent it.
> I have a working
> anything
> > >> damaged / non-functional would knock a pretty good chunk off
> the price.
> > >>
> > >> Bob
> > >>
> > >>
> > >> On Nov 14, 2010, at 11:29 AM, William H. Fite wrote:
> > >>
> > >>> Gent
> Hi,
>
> recently I added a nice 11848A phase noise interface to the herd.
>
> It came with the options K23 (DC Blocking Filter) and K21 (AM Detector
> Filter), including the complete set of adapters, manuals and matching /
> calibration networks.
> If anyone is interested, I'll be happy to scan
> I’ve looked at Wikipedia and I am as lost as when I started.
>
> Could someone walk me through the process step by step and also
> tell me what test equipment is required?
>
Besides the pointers at www.leapsecond.com , I've collected a few links at
http://www.ke5fx.com/stability.htm that
>My first chore is to investigate what kind of pulse
>rise-times I get from a selection of inexpensive
>ultrasonic sensors when a supersonic bullet passes
>within a couple of feet from them. I have a Tek
>2252 scope that I can place downrange to look at the
>sensors with b
The list has about 900 subscribers, if I remember correctly. If, before
posting, we took a moment to ask ourselves, "What are the odds that more
than 1% of the subscriber base is interested in what I'm about to say?", the
S/N problem would pretty much take care of itself.
-- john, KE5FX
(seldom o
odulation, ..
> I have a 5065 so am always interested in tid bits that I read.
> Thanks
>
> On Fri, Oct 29, 2010 at 12:34 AM, John Miles wrote:
>
> > How's the photo current? Does it vary as well? If not, I
> don't think I'd
> > be too worried about the phys
Well, it depends on the conditions -- you'd have to hold the temperature
steady to conclude that, not to mention the reference (which was...?) All
of the runs represent good performance for a 10811.
-- john, KE5FX
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-
How's the photo current? Does it vary as well? If not, I don't think I'd
be too worried about the physics package.
I would, however, check the electrolytics on the oven controller board. You
don't want an oven controller failure.
-- john, KE5FX
> -Original Message-
> From: time-nuts-b
To run two 5370Bs at once, you could drive the START inputs of the two counters
with the 1-pps outputs from your GPIB clocks, and drive each STOP input with
the opposing clock's 10 MHz output. With the counters running in their default
(+TI) mode you should see the 0-100 ns phase difference bet
Neat box. Pentek has some really interesting hardware.
-- john, KE5FX
> -Original Message-
> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
> Behalf Of Arthur Dent
> Sent: Sunday, October 24, 2010 6:14 PM
> To: time-nuts@febo.com
> Subject: [time-nuts] I have a ne
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