[time-nuts] SRS TSD12
Folks, I have noted that a number of Stanford Research TSD12 Rubidium standards are available on the auction site. I searched the TN archives and the interweb and came up with little useful information. Does anyone have any information about these units? Is it a rebadged PRS-10 made for the Telecom market? The connector pinout is identical to the PRS10, at least. TIA, Shaun M ___ 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] Lucent KS-24361 GPSDO arrived today several questions
Folks, I have been working with the first of two of these systems purchased from the auction site. I have a few observations and comments to offer: Bob said: In normal use Lucent treats the Ref-0 unit as the master and Ref-1 as the slave, but it's Ref-1 that contains the GPS module. And you need to be connected via serial port to Ref-1 in order to control the GPS and do things like change the antenna delay and initiate a site survey. Otherwise you are ignored like an annoying relative :-) Bob also pointed out that the interface connector cable between the two units can cause issues. I can attest to this first hand. I needed to reseat both ends of the cable several times before the two units would talk to each other. There is a version of SatStat that will happily run under Windows 7 64bit; no VM is needed. This is Symmetricom version 5.0. The earlier version of Satstat will not run under Win 7 64 except in an XP VM. That said, I am using GPSCon to talk to the Z3811A via a serial to USB converter and Stewart's original RS422 to RS232 hack until my hardware converters arrive. I have put up a GPSCon page showing the Lucent KS-24361 as it ages: http://www.shaunmerrigan.info/timeandfreq/gpscon4/gpsstat.htm Shaun M. ___ 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] WWVB on the air? Looked at the site it says it is.
Just checked my Spectracom and it is locked and time synced at 19:48 UTC from Edmonton, AB. Shaun M Sent from my iPad3 No Regret On 2012-05-13, at 13:27, paul swed paulsw...@gmail.com wrote: Hello to the group Can't seem to pickup wwvb. Have several different rcvrs and antennas. Its either really weak or not there and been that way since Friday. Looked at the nist site and no real notice of any sort. Thanks Paul ___ 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] WWVB phase-modulation test
Just wondering if anyone on the list is monitoring their WWVB gear at the moment? I got in a bit late, but I have been recording my 8170 since about 0300 and it has remained locked. QTH here is about 1500km north of Ft. Collins. Shaun M -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed Sent: April-14-12 8:45 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] WWVB phase-modulation test psk fixer-uppers not working all that well. Back to the drawing boards as they say. But at least I can see whats up. On Sat, Apr 14, 2012 at 9:51 PM, paul swed paulsw...@gmail.com wrote: East coast here Yes I ran into the same thing so missed getting the spectracom 8170 sync'ed. Doesn't matter really, I now see whats up. The HP 117 and the fluke 207 all lost lock and phase all over as expected. Just jimmied in the homebrew psk fixer'upper (Another time-nut is helping also.) to see if the fluke 207 will lock. I can see I have an issue with the hysteresis, but knew that going in. The 207 does lock but the above issue is not helping at all. Very curious I was copying a signal when wwvb was off, must have been MSF. It was pretty darn weak at -85db. Regards Paul WB8TSL On Sat, Apr 14, 2012 at 9:40 PM, John Seamons j...@jks.com wrote: On Apr 14, 2012, at 7:05 PM, Jim Hickstein wrote: Did they start early? Both my Spectracom 8164 and 8170 are unlocked. I was expecting this, but not before 0130Z. The transmitter went off-air starting at 0100Z. Back on now at 0130 presumably with PSK. I'm recording, but haven't done any decoding yet. I'm hoping this test is more than just the static data pattern from last time. ___ 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] Spectrcom 8170 Reloaded
Paul, Thanks for the reply. I have been out of the loop so to speak for a while, so I did not know about your simulator. I'll look in the archives and retrieve the information. The story behind the 8170 and 2042 is I purchased them well in advance of LORAN (in NA at least) going silent, but only just now had the time to start testing them. Thanks, Shaun M -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed Sent: July-22-11 8:39 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Spectrcom 8170 Reloaded Hi Shaun I may have missed a email or something. I think. You are using the 8170s 1 MC out to drive a loran commercial simulator that then drives the austron. Do I understand this correctly? I designed and built a few simple chips loran c sim about 1.5 years ago and shared that information on Time-nuts before loran C shut down for good. It takes in 100kc -5 mc etc and provides a loran c master station output. Numbers of austrons I have lock to it very quickly and resolve down to the austron limits, as long as the reference is good. Several of us with the 8170s have noticed the significant 1 mc output phase jumps due to the depth of modulation of the wwvb signal. (Thats my theory at least). Believe all of these vintage rcvrs suffers the same issue this includes the tracor 599 and hp117s (To a far lesser extent). I have discussed with another time-nut Paul about adding a limiter or at least gain ahead of the I detector in the 8170 also will need to build at least an equivalent delay for the q detector to keep it at 90 degrees. Simply over the last few weeks have not had time to do so. My interest is in lowering the jitter of these units. What I am doing will have no effect on the propagation effects. Regards Paul WB8TSL On Fri, Jul 22, 2011 at 12:34 AM, Shaun Merrigan smerr...@compusmart.ab.cawrote: Last step is to let the Austrons (2100R and 2100F) lock to the new LORAN inputs thus: http://www.flickr.com/photos/acme-laboratories/5947818627/ and the 2100R: http://www.flickr.com/photos/acme-laboratories/5963265512/ Shaun M No Regret (Since 1996) ___ 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] Spectracom 8170
Fellow Time-Nuts, Since LORAN is now gone in North America, I needed a backup to GPS (belt and suspenders man, me). I recently acquired a working Spectracom 8170 thus: http://flic.kr/p/a4CYww Using my ex-LORAN antenna (LF Engineering L-400B) it syncs in about 10 minutes. Shaun M. No Regret (Since 1996) ___ 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] Spectracom and Austron
So the next step is to power up an Austron 2042 using the 1 Mhz o/p from the Spectracom 8170, thus: http://www.flickr.com/photos/acme-laboratories/5948373640/ Shaun M. No Regret (Since 1996) ___ 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] Spectrcom 8170 Reloaded
Last step is to let the Austrons (2100R and 2100F) lock to the new LORAN inputs thus: http://www.flickr.com/photos/acme-laboratories/5947818627/ and the 2100R: http://www.flickr.com/photos/acme-laboratories/5963265512/ Shaun M No Regret (Since 1996) ___ 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] Austron 2070A
Fellow Time-Nuts: Would anyone have information about the Austron 2070A Clock/Synchronizer that they would be willing to share? It seems to be built on the same chassis as the 2000C, and has six nixie tubes for time display. Thanks, Shaun Merrigan - [EMAIL PROTECTED] 53.6044N, 113.4517W ACME LABS Materials Engineering Without Materials, Nothing. -SPM Altair 8080B, the genesis of an Industry... ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
RE: [time-nuts] Austron 2000C
Regarding the Austron 2000C setup: I just finished going through the chart recorder method of determining the tracking point, and it turns out that I was correct in my visual determination using the oscilloscope and sweep rates of 5 and 10 us/division. However, it is much easier to see the first cycle of the pulse on the chart paper than on the 'scope screen. I can see that with higher background noise, the chart recorder would be better. Presumably I could replace the paper chart recorder with a DAQ/PC arrangement as well. Shaun Merrigan - [EMAIL PROTECTED] 53.6044N, 113.4517W ACME LABS Materials Engineering Without Materials, Nothing. -SPM Altair 8080B, the genesis of an Industry... -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Shaun Merrigan Sent: Wednesday, August 10, 2005 19:40 To: Discussion of precise time and frequency measurement Subject: [time-nuts] Austron 2000C I have not (yet) used a chart recorder to determine the optimum position of the tracking pulse, relying instead on my 'scope and my eye. ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
[time-nuts] Austron 2000C
As I am away from my day job for a time, I have had the opportunity to play with a few pieces of equipment, including the 2000C. The 2000C requires somewhat more operator intervention than the 2100R (joke!!), but it is very interesting to watch the tracking and locking traces on an oscilloscope. First time though the setup was a bit shaky, but now I can do it without the manual open :-) I have not (yet) used a chart recorder to determine the optimum position of the tracking pulse, relying instead on my 'scope and my eye. To check the stability and reliability of the 2000C, I am feeding the 1Mhz phase corrected output of the 2000C into the reference input of a 2100F. They are fed from the same active LF antenna via an Austron 2084 splitter. I can receive several LORAN stations here, but the best one is 82900 Master station at Havre, MT. It is very strong, night and day. Shaun Merrigan - [EMAIL PROTECTED] 53.6044N, 113.4517W ACME LABS Materials Engineering Without Materials, Nothing. -SPM ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
[time-nuts] Datum Symmetricom PRR-10 Question
I've seen several of these for sale on Ebay with various options and configurations. Is there any software available to communicate with this unit? A terminal program might work, but one would have to know the PRR-10's ASCII command set. I have looked into this with the usual searches and inquiries but turned up nothing as yet. I am hoping to hear something from Symmetricom. Any information or links would be appreciated. TIA. Shaun Merrigan - [EMAIL PROTECTED] 53.6044N, 113.4517W ACME LABS Materials Engineering ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
