Thanks Bob, I swapped with a known good antenna from my TBolt and still no tracking. The XO is putting out 5vdc on the antenna jack. I think I have a spare Motorola UT+ to try and will report back.
Jerry -----Original Message----- From: Bob kb8tq <kb...@n1k.org> Sent: Sunday, October 31, 2021 9:47 PM To: Discussion of precise time and frequency measurement <time-nuts@lists.febo.com> Subject: [time-nuts] Re: RFTGm-II (KS-24019) XO Fault but GPS to Rb is OK 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, k1...@att.net 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: k1...@att.net <k1...@att.net> > Sent: Sunday, October 31, 2021 10:20 AM > To: 'time-nuts@lists.febo.com' <time-nuts@lists.febo.com> > 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 -- time-nuts@lists.febo.com -- To unsubscribe > send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and > follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.