Re: [time-nuts] Home made GPS disciplined atomic clock
> If you have an older PC/laptop that can run DOS or WIN98 and has a VESA > compatible video BIOS > then you might want to try Lady Heather's Disciplined Oscillator Controller > Program (downloadable > from the archives). It has bulilt in support for calculating and graphing the ADEV/OADEV of the > PPS and OSC parameters. Also graphs the PPS and OSC values along with the DAC and TEMP > parameters and the satellite count. Constellation changes are also marked. Thanks again. Just tested that (runs also with XP DOS mode) and it's great! Have to set some older laptop for this. It even shows me that the Kalman filter was still OFF, that information seems to be missing in tboltmon. -- 73s! Esa OH4KJU ___ 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] Home made GPS disciplined atomic clock
Hi Mark, Where from could I download this program (Lady Heather) Thanks Predrag Dukic At 23:14 25.1.2009, you wrote: >If you have an older PC/laptop that can run DOS >or WIN98 and has a VESA compatible video >BIOS then you might want to try Lady Heather's >Disciplined Oscillator Controller Program >(downloadable from the archives). It has bulilt >in support for calculating and graphing the >ADEV/OADEV of the PPS and OSC parameters. Also >graphs the PPS and OSC values along with the DAC >and TEMP parameters and the satellite >count. Constellation changes are also >marked. The source code is there if you want to >modify it for a more modern system. The >distributed version was compiled with Quick C and set up for a 1024x768 screen. > > >- > > > One test you can perform that should give an indication of the location > > of the Allan intercept is to: > >Ok, thanks for your clear instructions! > >My test periods have been much too short, if the Kalman filter learning >takes even days! But with these instructions I'lll get better data for >OCXO vs. LPRO comparison and maybe also the OCXO health. > > > Ulrich's Plotter is good for this > >Hmm. Is that software available somewhere? >No luck with quick Google tour... >_ >Windows Live Hotmail®: more than just e-mail. >http://windowslive.com/explore?ocid=TXT_TAGLM_WL_t2_hm_justgotbetter_explore_012009 >___ >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] Agilent 53132A Needs Help
> Date: Thu, 22 Jan 2009 23:00:04 -0500 > From: tomk...@nist.gov > Subject: Re: [time-nuts] Agilent 53132A Needs Help > To: "Yuri Ostry" , "Discussion of precise time and > frequency measurement" > Message-ID: <20090122230004.10395e4xbu1m3...@webmail.nist.gov> > Content-Type: text/plain; charset=ISO-8859-1; DelSp="Yes"; > format="flowed" > > Hi Yuri; > I am late to this thread, but if you have not tried this, reseating > the 4 or 2 eproms which are socketed near the rear may solve the > problem. I am currently having the same problem with one of mine and > in the past this have solved the problem on other units. > Good Luck; > Thomas Knox > NIST > 4475 Whitney Place > Boulder Colorado 80305 > 1-303-554-0307 > tomk...@nist.gov > I think I've seen seven Agilent 54132A counters and three of units flagged a ROM fault after Power On Self Test. They had all been well looked after, sitting in racks in a very high end environment, I suspect they were switched on continuously all year. The last statement may be a clue of course. I did have a very brief play with the 'faulty' ones and things seemed to work after the fault message was acknowledged, I could not see any symptoms other than the self test error message. A nice counter but I'm getting ever more nervous about the ability of current test equipment to survive 5 to 10 years. David ___ 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] Home made GPS disciplined atomic clock
I found a link from message archives: http://www.febo.com/pipermail/time-nuts/attachments/20081224/4a474e8d/attachment-0001.zip -- 73s! Esa OH4KJU ___ 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] Home made GPS disciplined atomic clock
Hallo Folkert, Ik zag C, gps en source dus misschien iets voor jou On Mon, Jan 26, 2009 at 12:26 PM, Esa Heikkinen wrote: > I found a link from message archives: > > http://www.febo.com/pipermail/time-nuts/attachments/20081224/4a474e8d/attachment-0001.zip > > > -- > 73s! > Esa > OH4KJU > > ___ > 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. > -- "Je hoeft het niet met elkaar eens te zijn om naar elkaar te luisteren." Ook van Loesje ___ 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] Home made GPS disciplined atomic clock
> Hallo Folkert, > Ik zag C, gps en source dus misschien iets voor jou Anteeksi mutta en ymmärrä kieltä... :-) In english: Sorry, I do not understand that language. -- 73s! Esa OH4KJU ___ 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] Home made GPS disciplined atomic clock
Sorry, I hit the wrong button, Henk On Mon, Jan 26, 2009 at 1:46 PM, Esa Heikkinen wrote: > > Hallo Folkert, > > Ik zag C, gps en source dus misschien iets voor jou > > Anteeksi mutta en ymmärrä kieltä... :-) > > In english: Sorry, I do not understand that language. > > -- > 73s! > Esa > OH4KJU > > > ___ > 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. > -- "Je hoeft het niet met elkaar eens te zijn om naar elkaar te luisteren." Ook van Loesje ___ 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] Setting loop TC using thunderbolt internal data.
I ran the same test as Bruce Griffiths on my tbolt; that is, I turned off osc disciplining altogether and created an OADEV plot from the internal phase measurements taken from its GPS solution. The plot is attached. It has a minimum of about 1e-11 at tau=800, and it has the sane general shape as Griffiths'. The next experiment I plan to do is to repeat the same thing using manual holdover mode rather than "Disable disciplining". That should continue to try to compensate for temperature and long-term drift (just not steered by GPS), whereas the data taken last night use a fixed DAC. --bruce W1BW <>___ 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] Agilent 53132A Needs Help
Hello, Monday, January 26, 2009, 14:14:54, David wrote: D> I think I've seen seven Agilent 54132A counters and three of units flagged a D> ROM fault after Power On Self Test. They had all been well looked after, D> sitting in racks in a very high end environment, I suspect they were D> switched on continuously all year. The last statement may be a clue of D> course. When I worked with older CNC equipment (Fanuc, Bosch), after any occurence of checksum error we do a total refresh of all EPROMs in a unit. And the same was scheduled to each other routine yearly maintenance (i.e. we reprogrammed all EPROMs each 2 years just to be completely sure). Needless to say, that we had images of any and all EPROM chip archived. D> I did have a very brief play with the 'faulty' ones and things seemed to D> work after the fault message was acknowledged, I could not see any symptoms D> other than the self test error message. A nice counter but I'm D> getting ever more nervous about the ability of current test D> equipment to survive 5 to 10 years. I always try to keep known good images of all programmable chips from equipment I own, if it is possible.. It is already saved me from troubles with my Marconi 2955, where calibration EEPROM (Xicor X2816) failed one day... At the same time, I'm little nervous, too, about more modern equipment that have both firmware and calibration data on a single SMT flash chip. Or, that is even worse, on a some 1.8" HDD... A friend of mine already have Rohde & Schwarz cell phone tester with failed HDD, so internal harddrives is also on my "must be backed up" list now. OS/Firmware usually may be copied from similar unit, but calibration data is something unique and may be very expensive thing to recover. I already saved few various units with leaked EPROMs or parallel EEPROMs using method that I described earlier in this list, but I'm not so sure that it will work equally well with flash chips, so looks like it is better to have a full image on disk. -- Best regards, Yuri mailto:y...@ostry.ru ___ 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] Setting loop TC using thunderbolt internal data.
Some idea of the shift in the minimum can be gleaned by plotting the Hadamard deviation vs tau. Bruce Walker wrote: > I ran the same test as Bruce Griffiths on my tbolt; that is, I turned off > osc disciplining altogether and created an OADEV plot from the internal > phase measurements taken from its GPS solution. The plot is attached. It > has a minimum of about 1e-11 at tau=800, and it has the sane general shape > as Griffiths'. > > The next experiment I plan to do is to repeat the same thing using manual > holdover mode rather than "Disable disciplining". That should continue to > try to compensate for temperature and long-term drift (just not steered by > GPS), whereas the data taken last night use a fixed DAC. > > --bruce W1BW > > ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Datum 1000B OXCO
After several dissemble assemble cycles the oven heater started working, it is very slow reaching a stable frequency, about 12 hours. So maybe only one of the two transistors is working but this allows me to move on for now. The frequency was closer but I changed a 33 PF capacitor to about 20 Pf across the crystal to get to the 5+ Mhz. My hope is I can restore the original cap when the heater is repaired. My FTS 4040 is now ramping the frequency but not locking, I have hope as it starts with a wide range and closes in on the correct frequency +- a few counts so maybe the tube is very weak and not dead. Will wait and hope it repairs itself:-) Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Datum 1000B OXCO
After several dissemble assemble cycles the oven heater started working, it is very slow reaching a stable frequency, about 12 hours. So maybe only one of the two transistors is working but this allows me to move on for now. The frequency was closer but I changed a 33 PF capacitor to about 20 Pf across the crystal to get to the 5+ Mhz. My hope is I can restore the original cap when the heater is repaired. My FTS 4040 is now ramping the frequency but not locking, I have hope as it starts with a wide range and closes in on the correct frequency +- a few counts so maybe the tube is very weak and not dead. Will wait and hope it repairs itself:-) Stanley ___ 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] Setting loop TC using thunderbolt internal data.
Thanks for the suggestion. Here is a composite plot with Allan and Hadamard deviations for my tbolt run last night with disciplining disabled. I think I computed Hadamard correctly. OADEV (blue) has a minimum of 9.6e-12 around tau=790 OHDEV (red) has a minimum of 4.9e-12 around tau=1660 --bruce W1BW On Mon, Jan 26, 2009 at 2:05 PM, Bruce Griffiths wrote: > > Some idea of the shift in the minimum can be gleaned by plotting the > Hadamard deviation vs tau. > > Bruce Walker wrote: > > I ran the same test as Bruce Griffiths on my tbolt; that is, I turned off > > osc disciplining altogether and created an OADEV plot from the internal > > phase measurements taken from its GPS solution. The plot is attached. > It > > has a minimum of about 1e-11 at tau=800, and it has the sane general > shape > > as Griffiths'. > > > > The next experiment I plan to do is to repeat the same thing using manual > > holdover mode rather than "Disable disciplining". That should continue > to > > try to compensate for temperature and long-term drift (just not steered > by > > GPS), whereas the data taken last night use a fixed DAC. > > > > --bruce W1BW > > > > > > ___ > 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] Setting loop TC using thunderbolt internal data.
Bruce What was the record length? TOTDEV and TOTHadamard should give more reliable estimates over a greater tau range. Bias corrected Theo_1 and the Hadamard equivalent should be even better at longer tau. Bruce Bruce Walker wrote: > Thanks for the suggestion. Here is a composite plot with Allan and Hadamard > deviations for my tbolt run last night with disciplining disabled. I think > I computed Hadamard correctly. > > OADEV (blue) has a minimum of 9.6e-12 around tau=790 > OHDEV (red) has a minimum of 4.9e-12 around tau=1660 > > --bruce W1BW > > > On Mon, Jan 26, 2009 at 2:05 PM, Bruce Griffiths >> wrote: >> > > >> Some idea of the shift in the minimum can be gleaned by plotting the >> Hadamard deviation vs tau. >> >> Bruce Walker wrote: >> >>> I ran the same test as Bruce Griffiths on my tbolt; that is, I turned off >>> osc disciplining altogether and created an OADEV plot from the internal >>> phase measurements taken from its GPS solution. The plot is attached. >>> >> It >> >>> has a minimum of about 1e-11 at tau=800, and it has the sane general >>> >> shape >> >>> as Griffiths'. >>> >>> The next experiment I plan to do is to repeat the same thing using manual >>> holdover mode rather than "Disable disciplining". That should continue >>> >> to >> >>> try to compensate for temperature and long-term drift (just not steered >>> >> by >> >>> GPS), whereas the data taken last night use a fixed DAC. >>> >>> --bruce W1BW >>> >>> >>> ___ 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] Setting loop TC using thunderbolt internal data.
The data I posted came from a 10 hour run collecting data every second. I could certainly set up other longer experiments. We quickly arrive at the limits of my experience...I had never looked at Hadamard deviation before. I was curious to see what I could learn about the Tbolt without having anything better to measure it against. For the time being, this is my "lab" reference. Let me see whether I understand what I've measured. The Allan intercept for my tbolt's undisciplined oscillator as measured by the onboard GPS solution is on order tau=800s. The Hadamard intercept under the same conditions appears to be more like 1600s. Does that tell me that if the disciplining model includes a drift compensation, the optimal disciplining time constant is close to the Hadamard intercept tau, but if there were no drift model, the Allan intercept would be more appropriate? And a primer or reference to the other statistical measures you mentioned (Theo_1, etc.) would be appreciated. --bruce W1BW On Mon, Jan 26, 2009 at 3:36 PM, Bruce Griffiths wrote: > > Bruce > > What was the record length? > > TOTDEV and TOTHadamard should give more reliable estimates over a > greater tau range. > > Bias corrected Theo_1 and the Hadamard equivalent should be even better > at longer tau. > > Bruce > > Bruce Walker wrote: > > Thanks for the suggestion. Here is a composite plot with Allan and Hadamard > > deviations for my tbolt run last night with disciplining disabled. I think > > I computed Hadamard correctly. > > > > OADEV (blue) has a minimum of 9.6e-12 around tau=790 > > OHDEV (red) has a minimum of 4.9e-12 around tau=1660 > > > > --bruce W1BW > > > > > > On Mon, Jan 26, 2009 at 2:05 PM, Bruce Griffiths > > >> wrote: > >> > > > > > >> Some idea of the shift in the minimum can be gleaned by plotting the > >> Hadamard deviation vs tau. > >> > >> Bruce Walker wrote: > >> > >>> I ran the same test as Bruce Griffiths on my tbolt; that is, I turned off > >>> osc disciplining altogether and created an OADEV plot from the internal > >>> phase measurements taken from its GPS solution. The plot is attached. > >>> > >> It > >> > >>> has a minimum of about 1e-11 at tau=800, and it has the sane general > >>> > >> shape > >> > >>> as Griffiths'. > >>> > >>> The next experiment I plan to do is to repeat the same thing using manual > >>> holdover mode rather than "Disable disciplining". That should continue > >>> > >> to > >> > >>> try to compensate for temperature and long-term drift (just not steered > >>> > >> by > >> > >>> GPS), whereas the data taken last night use a fixed DAC. > >>> > >>> --bruce W1BW > >>> > >>> > >>> > > > ___ > 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] Home made GPS disciplined atomic clock
I think that the KALMAN setting of the filter is not actually available in the Thunderbolt. It is only supported in the Thunderbolt-E. -- Thanks again. Just tested that (runs also with XP DOS mode) and it's great! Have to set some older laptop for this. It even shows me that the Kalman filter was still OFF, that information seems to be missing in tboltmon. _ Windows Live™ Hotmail®:…more than just e-mail. http://windowslive.com/explore?ocid=TXT_TAGLM_WL_t2_hm_justgotbetter_explore_012009 ___ 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] Precision voltage to current conversion
I recently picked up a Fluke 515A meter calibrator. It puts out 0-10V AC/DC (and 100V fixed) suitable for 4.5 - 5.5 digit meters. The DC voltage source impedance is around 300 ohms. I would like to build a (reasonably simple) converter to allow current ranges to be calibrated to around the same level of accuracy. A simple single op-amp floating load converter might do for low currents (I have some 0.001% 1K resistors that would make a nice 1ma/V converter). Can anybody recommend any other circuits? Also circuits for higher load currents? _ Windows Live™: E-mail. Chat. Share. Get more ways to connect. http://windowslive.com/howitworks?ocid=TXT_TAGLM_WL_t2_allup_howitworks_012009 ___ 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] Setting loop TC using thunderbolt internal data.
Bruce If the Allan deviation plot is symmetric about the minimum then the Allan intercept and the minimum have the same value of tau. If the plot is asymmetric about the minimum then the Allan intercept and the minimum dont share the same value of tau. The shift is usually around 24% or less with the Allan intercept tau shifted to the steeper slope side of the minimum. The Hadamard deviation is insensitive to linear frequency drift, however it has a different phase noise transfer function than the Allan deviation. Thus the Hadamard minimum is at best indicative of the Allan intercept location when linear frequency drift is corrected. NIST SP1065 (http://tf.nist.gov/timefreq/general/pdf/2220.pdf) is a good starting point as it includes a comprehensive set of references. However one should bear in mind that ADEV, OADEV, TOTDEV, Theo_1 etc are merely estimators for the Allan deviation. ADEV is not the Allan deviation it is merely a poor estimator for it. The other estimators make progressively more effective use of the data. Bruce Bruce Walker wrote: > The data I posted came from a 10 hour run collecting data every > second. I could certainly set up other longer experiments. > > We quickly arrive at the limits of my experience...I had never looked > at Hadamard deviation before. I was curious to see what I could learn > about the Tbolt without having anything better to measure it against. > For the time being, this is my "lab" reference. > > Let me see whether I understand what I've measured. The Allan > intercept for my tbolt's undisciplined oscillator as measured by the > onboard GPS solution is on order tau=800s. The Hadamard intercept > under the same conditions appears to be more like 1600s. Does that > tell me that if the disciplining model includes a drift compensation, > the optimal disciplining time constant is close to the Hadamard > intercept tau, but if there were no drift model, the Allan intercept > would be more appropriate? > > And a primer or reference to the other statistical measures you > mentioned (Theo_1, etc.) would be appreciated. > > --bruce W1BW > > On Mon, Jan 26, 2009 at 3:36 PM, Bruce Griffiths > wrote: > >> Bruce >> >> What was the record length? >> >> TOTDEV and TOTHadamard should give more reliable estimates over a >> greater tau range. >> >> Bias corrected Theo_1 and the Hadamard equivalent should be even better >> at longer tau. >> >> Bruce >> >> Bruce Walker wrote: >> >>> Thanks for the suggestion. Here is a composite plot with Allan and Hadamard >>> deviations for my tbolt run last night with disciplining disabled. I think >>> I computed Hadamard correctly. >>> >>> OADEV (blue) has a minimum of 9.6e-12 around tau=790 >>> OHDEV (red) has a minimum of 4.9e-12 around tau=1660 >>> >>> --bruce W1BW >>> >>> >>> On Mon, Jan 26, 2009 at 2:05 PM, Bruce Griffiths >> >>> wrote: >>> Some idea of the shift in the minimum can be gleaned by plotting the Hadamard deviation vs tau. Bruce Walker wrote: > I ran the same test as Bruce Griffiths on my tbolt; that is, I turned off > osc disciplining altogether and created an OADEV plot from the internal > phase measurements taken from its GPS solution. The plot is attached. > > It > has a minimum of about 1e-11 at tau=800, and it has the sane general > > shape > as Griffiths'. > > The next experiment I plan to do is to repeat the same thing using manual > holdover mode rather than "Disable disciplining". That should continue > > to > try to compensate for temperature and long-term drift (just not steered > > by > GPS), whereas the data taken last night use a fixed DAC. > > --bruce W1BW > > > > >> ___ >> 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.
Re: [time-nuts] Precision voltage to current conversion
Mark Sims wrote: > I recently picked up a Fluke 515A meter calibrator. It puts out 0-10V AC/DC > (and 100V fixed) suitable for 4.5 - 5.5 digit meters. The DC voltage source > impedance is around 300 ohms. I would like to build a (reasonably simple) > converter to allow current ranges to be calibrated to around the same level > of accuracy. A simple single op-amp floating load converter might do for low > currents (I have some 0.001% 1K resistors that would make a nice 1ma/V > converter). > > Can anybody recommend any other circuits? Also circuits for higher load > currents? > Mark I presume you mean that the floating load constitutes the feedback impedance in an opamp inverter with the presision resistor forming the input resistor? If a floating load is OK, one can use a non inverting opamp with the precision shunt connected between the load and common. The other end of the load is driven by the opamp output (can include a high current output booster within the loop) and the inverting opamp input is connected to the upper sense terminal of the precision resistor. The source is connected to the opamp non inverting input. An inverting equivalent is also possible (may be more practical with a high voltage booster connected to the opamp output). Cancellation of the loading of the feedback resistor on the current sensing resistor is possible if an additional pamp is used. Bruce ___ 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] Home made GPS disciplined atomic clock
Mark So why does the Thunderbolt distinguish between a fixed DAC voltage (as when the disciplining is turned off) and a corrected value (as in manual holdover). How does it learn the drift correction parameters without using a Kalman filter or its equivalent. Are you perhaps suggesting that the Tunderblt doesnt allow the Kalman filter to be manually enabled or disabled? Bruce Mark Sims wrote: > I think that the KALMAN setting of the filter is not actually available in > the Thunderbolt. It is only supported in the Thunderbolt-E. > > > > -- > > Thanks again. Just tested that (runs also with XP DOS mode) and it's > great! Have to set some older laptop for this. It even shows me that the > Kalman filter was still OFF, that information seems to be missing in > tboltmon. > > > _ > Windows Live™ Hotmail®:…more than just e-mail. > http://windowslive.com/explore?ocid=TXT_TAGLM_WL_t2_hm_justgotbetter_explore_012009 > ___ > 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] Looking for PDF of Getting Started Guide for HP 5372A
As the title says, I greatly desire a copy of the Getting Started Guide for HP 5372A HP document number is 05372-90010 I've looked in the normal sites, including Agilent, but no luck so far. I found one at a pay site, but am hoping to find a free copy. I currently have these PDF files (from Agilent site): 05372-90016 Service manual 4/1990 453 pages 05372-90016 Service manual update 1/1993 145 pages 05372-90032 Opt 40 jitter spectrum 8/1991 194 pages 05372-90035 Operating manual 5/1995687 pages 05372-90036 Programming manual 10/1992 485 pages 5952-8012 Condensed reference and spec 10/1989 102 pages Thanks for any help, Philip ___ 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] Looking for PDF of Getting Started Guide for HP 5372A
Philip, you beat me to it. I was about to make the same request. FYI, earlier posts suggested emailing manu...@agilent.com . I did this some months ago with no response. According to the Condensed Reference & Specification Guide, the part number for the Getting Started Guide is 5952-8009. Doesn't really matter. I couldn't find either number. :-) Ed Philip Freidin wrote: > As the title says, I greatly desire a copy of the > Getting Started Guide for HP 5372A > > HP document number is 05372-90010 > > I've looked in the normal sites, including Agilent, but no > luck so far. > > I found one at a pay site, but am hoping to find a free copy. > > I currently have these PDF files (from Agilent site): > > 05372-90016 Service manual 4/1990 453 pages > 05372-90016 Service manual update 1/1993 145 pages > 05372-90032 Opt 40 jitter spectrum 8/1991 194 pages > 05372-90035 Operating manual 5/1995687 pages > 05372-90036 Programming manual 10/1992 485 pages > 5952-8012 Condensed reference and spec 10/1989 102 pages > > Thanks for any help, > Philip > > > > > > -- > > ___ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > End of time-nuts Digest, Vol 54, Issue 107 > ** > ___ 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.
