Re: [time-nuts] Just for Fun - Synergy Systems SSR-6T PPS Comparison
Le 20 déc. 2012 à 07:07, David Martin a écrit : > http://youtu.be/kOG9ImT2lvY It wouldn't open for me... private ___ 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] Just for Fun - Synergy Systems SSR-6T PPS Comparison
Hi David: I got my new SSR-6T today, quite prompt. I can't find a darn thing about pinout or anything else on the Synergy site, nor can I produce anything from Boogle. Where did you find the info? I have a call in to Synergy, but I'm just wondering... Thanks Don David Martin > A Day in the Life of Five PPS Sources.. > > This probably does not qualify as a regular TimeNuts submission as there > are no Tau's or 10^-12ths but I could not resist a simple scope capture > of > the Pulse Per Second output of my new SSR-6t toy from Synergy Systems as > it > performed its first right-out-of-the box site survey. > > See http://youtu.be/kOG9ImT2lvY > > This is video is a two minute replay of the PPS behavior of two PRS-10s, > two TBolts, and the SSR-6t during it's initial 24 hour site survey. > > The scope captured the relationship of all five PPS outputs at one frame > per second. The video clip replays 24 hours of captures at 1000 frames > per > second. The whole day's PPS behavior is replayed in under two minutes. > > The Scope is externally triggered from a PRS-10 that > is actively disciplined from a TBolt PPS. The Yellow Trace is a second > PRS-10 that is also actively disciplined from the same TBolt. Hence the > trigger point (center of screen) and the Yellow Trace compare the two > PRS-10s that have been running in parallel for a couple of months. > > The Magenta Trace and the Blue Trace are two other TBolts. (These traces > have the nice sharp risetime ) > > Everybody is fed from a common antenna via a mini-circuits splitter. > > The Light Blue Trace is the new SSR-6t running in navigation mode. The > spreading of the Light Blue Trace is the usual sawtooth dance that most > raw > GPS PPS outputs display -- The playback rate just smears all the > individual > sawtooth steps into a pretty waterfall. > > This is not intended to be a "scientific" submission but I hope someone > finds it entertaining and enlightening view of the instantaneous PPS > behavior of these devices. > > Dave > ___ > 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. > -- "Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind." De Erroribus Medicorum, R. Bacon, 13th century. "If you don't know what it is, don't poke it." Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.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.
Re: [time-nuts] Just for Fun - Synergy Systems SSR-6T PPS Comparison
A Day in the Life of Five PPS Sources.. This probably does not qualify as a regular TimeNuts submission as there are no Tau's or 10^-12ths but I could not resist a simple scope capture of the Pulse Per Second output of my new SSR-6t toy from Synergy Systems as it performed its first right-out-of-the box site survey. See http://youtu.be/kOG9ImT2lvY [] This is not intended to be a "scientific" submission but I hope someone finds it entertaining and enlightening view of the instantaneous PPS behavior of these devices. Dave = Played perfectly here, Dave. Many thanks for a most interesting comparison! (My SSR-6t is on route from the USA, and I have two Trimble Resolution SMTs which are timing GPSs, and Sure Electronics boards which claim timing like accuracy. I'm limited by having only two channels on the 'scope!). Are you going to try the same with the SSR-6t in timing mode? Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ 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] Just for Fun - Synergy Systems SSR-6T PPS Comparison
The Synergy site doesn't list the SSR-6Tr but I found a datasheet here: http://diydrones.com/forum/topics/finally-a-relatively-inexpensive-u-blox-lea-6t-board-in-the-us ___ 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] Just for Fun - Synergy Systems SSR-6T PPS Comparison
Just curious, what connector/pigtail/adapter board did you use to access the 2x5 1.27mm pitch connector on your SSR-6T. Thanks, Dale NV8U -Original Message- From: David Martin Sent: Thursday, December 20, 2012 1:07 AM To: time-nuts@febo.com Subject: [time-nuts] Just for Fun - Synergy Systems SSR-6T PPS Comparison A Day in the Life of Five PPS Sources.. This probably does not qualify as a regular TimeNuts submission as there are no Tau's or 10^-12ths but I could not resist a simple scope capture of the Pulse Per Second output of my new SSR-6t toy from Synergy Systems as it performed its first right-out-of-the box site survey. See http://youtu.be/kOG9ImT2lvY This is video is a two minute replay of the PPS behavior of two PRS-10s, two TBolts, and the SSR-6t during it's initial 24 hour site survey. The scope captured the relationship of all five PPS outputs at one frame per second. The video clip replays 24 hours of captures at 1000 frames per second. The whole day's PPS behavior is replayed in under two minutes. The Scope is externally triggered from a PRS-10 that is actively disciplined from a TBolt PPS. The Yellow Trace is a second PRS-10 that is also actively disciplined from the same TBolt. Hence the trigger point (center of screen) and the Yellow Trace compare the two PRS-10s that have been running in parallel for a couple of months. The Magenta Trace and the Blue Trace are two other TBolts. (These traces have the nice sharp risetime ) Everybody is fed from a common antenna via a mini-circuits splitter. The Light Blue Trace is the new SSR-6t running in navigation mode. The spreading of the Light Blue Trace is the usual sawtooth dance that most raw GPS PPS outputs display -- The playback rate just smears all the individual sawtooth steps into a pretty waterfall. This is not intended to be a "scientific" submission but I hope someone finds it entertaining and enlightening view of the instantaneous PPS behavior of these devices. Dave ___ 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] Just for Fun - Synergy Systems SSR-6T PPS Comparison
David, On 12/20/2012 07:07 AM, David Martin wrote: A Day in the Life of Five PPS Sources.. This probably does not qualify as a regular TimeNuts submission as there are no Tau's or 10^-12ths but I could not resist a simple scope capture of the Pulse Per Second output of my new SSR-6t toy from Synergy Systems as it performed its first right-out-of-the box site survey. See http://youtu.be/kOG9ImT2lvY This is video is a two minute replay of the PPS behavior of two PRS-10s, two TBolts, and the SSR-6t during it's initial 24 hour site survey. A good illustration. You realize that the T-bolts follow each other fairly well, as can be expected. The PRS-10s also follow each other fairly well. The variation between them could be speculated on, but first suspect would be multipath and satellite geometry. When having bad receiving conditions, the position moves around a lot, and loosing or gaining a bird could drastically change the geometry conditions and hence precision. For the T-bolts, these variations only go out to phase changes. If you would log the sat positions and tracking status alongside these deviations you might get a better feel for these effects. Also, the T-bolts avoids the sawtooth dance by steering the 10 MHz clock. Cheers, Magnus ___ 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.
