It's been a few years since I looked at this, but it seems to me that the message from the receiver to the time processors included an estimate of the reliability of the satellite data. That estimate depends on satellites being in the predicted positions. If there is an error, the time data is marked as invalid.
The old messages had 6 satellites, and the newer messages had 8. The messages were identical, except that the newer message reported 2 more satellites. An older time processor would not have been able to handle the new 8 sat message. So, no, you can't mix old and new RFTG modules. If this sounds like I know what I'm saying, you may be disappointed. Bill Hawkins -----Original Message----- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Tim Shoppa Sent: Tuesday, November 14, 2017 9:53 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Lucent RFTG-u REF0-REF1 cable Isn't info about what satellites are where, just eye candy and irrelevant to a real GPSDO? Tweaks to the elevation mask ought to be measurable in the PPS quality (if they aren't then they're irrelevant). Tim _______________________________________________ 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.