Hi I think you will find that the list of “visible” sats is coming from the stored almanac and your position (from the hold mode). You may have an antenna problem.
Bob > On Oct 31, 2021, at 7:21 PM, [email protected] wrote: > > Here's a follow-up.. > > I took out the XO pcb's and powered it up stand-alone. In the RFTGM > software, it shows as Active, Warmup, No Fail code and it is outputting a > clean 15MHz sine wave. In GPS - It's showing 8 visible Sats but Zero > Tracking SATs and is "Acquiring SATS/Position Hold" . The SAT IDs are > listed but Signal Strength and Channel Status are all zero. Its been > powered up for about an hour so far. Checking XO Voltages, all seems good > Control=14.574V, Temp 36.49, Ant Feed 16mA. The ADC = 0v as I think it > would be in warm-up mode. Now hopefully it will acquire and run for a > while. > > Jerry > > > > From: [email protected] <[email protected]> > Sent: Sunday, October 31, 2021 10:20 AM > To: '[email protected]' <[email protected]> > Subject: RFTGm-II (KS-24019) XO Fault but GPS to Rb is OK > > I have had a KS-24019 (L108-L109) pair running continuously for several > years. Now have a red LED Fault on the XO unit and the RB unit shows green > LED On-Line status. The NO-GPS LEDs are off on both the -XO and -RB units > but if I disconnect the antenna - they do show Yellow NO_GPS status. Got > out my old XP laptop and ran the Lucent software. The Rb (REF 0) is active > and locked to GPS and working fine. The XO says Unit Failed but the message > code for the first 4 hex nibbles which should show alarm status are all zero > bits so no failure code is evident. The last 2 alarm nibbles are 53 > representing the # of hours since failure. The GPS time is correct on the > Rb but is fixed on the XO at 80-01-06 00:00:00. The XO checksum shows PASS. > Based on this the XO GPS is working, locked and sending correct GPS messages > to Rb. The XO CPU seems to be working as well so am I correct this seems > to be a Osc failure? Besides checking voltages (which I'm not sure what > they should be) - any advice how to go about further testing sand repair? > > Thanks in advance > > Jerry NY2KW > > > > -- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > _______________________________________________ > time-nuts mailing list -- [email protected] -- To unsubscribe send an > email to [email protected] > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] -- To unsubscribe send an email to [email protected] To unsubscribe, go to and follow the instructions there.
