Hello Mark, you could connect the Fury 1PPS output to the 1PPS external sync input of the PRS-10 Rb and let is self-discipline to GPS. Set the Fury 1PPS jumper JP4 to raw-1PPS (pins 2 and 3), and that will make the Fury GPSDO generate the raw 1PPS signal from the Motorola GPS receiver albeit without sawtooth correction. You won't need sawtooth correction if you set the PRS-10 time constant to say 10,000 seconds. bye, Said In a message dated 5/1/2012 10:55:34 Pacific Daylight Time, mspencer12...@yahoo.ca writes:
Sorry to resurrect an old thread, but I thought someone might find this of interest. I purchased a 2700 intending to harvest the PRS10. Prior to cracking open the case I powered up the unit to ensure it was basically working so I could return it if needed. I noticed that despite not having an antenna connected it seemed to find and track CDMA signals and after a few hours the 10 Mhz output was in a few parts of 10E-12 of my GPSD0. After a bit of investigation I found the following Adding an external antenna didn't seem to make much difference to the performance. The 1pps output is approx. 75ms out of sync with the 1pps output from my Fury GPSD0. >From time to time the 10 Mhz output experiences phase jumps of several tens of ns. Manipulating the unit (ie. connecting to the RS 422 port) may induce this. Power cycling the unit seems to cure the problem and the unit usually takes an hour or two to re lock. It's possible that the lack of a proper ground in my instalation may be causing some of the issues as well. This problem would be a show stopper for me in terms of using this unit to replace my GPSDO's. I'm not sure if this issue is specfic to my unit or not. I've attached some initial ADEV plots showing the typical performance of the 10 Mhz output vs three of my other references. (I wouldn't put a lot of emphasis on the results of taus of less than 100 seconds or more than 6,000 or so..) I doubt I'm going to put much more time into this unit but it's an interesting novelty in it's original state. The results of other units may well differ (: Regards Mark Spencer _______________________________________________ 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.