I have a RTGm-II-XO and it takes quite some time to acquire the minimum 4 satellites. Using the same Symmetricom antenna with my Thunderbolt, it acquires 6-8 satellites in 15-20 mins while the RTGm-II-XO takes 60 minutes and sometimes much longer where I have power cycled it to get it out of warm-up. On power-up, the red alarm goes off within 15mins as programmed. I have preset my GPS coordinates using the RS-422 interface and Lucent software and set the coax length as well. The antenna voltage is correct at 4.9vdc and the antenna is drawing about 25 ma. The Lucent software shows correct XO voltages per the manual. Any advice appreciated. jerry

Hi Jerry ; I assume you mean RFTGm-II-XO. The cell sites usually had an Andrew 26dB antenna with a real short coax run. They also had a 40dB antenna option if needed. Unless you have a long coax run the Symmetricom ant should be ideal. I don't think the RFTGm-II-XO lock as quickly the Thundebolt but yours sounds like something is not right. Does the software allow you to set mask angle and PDOP? It could be set to high and be ignoring Sats. It also could possibly be set for a past fixed location. I have a few RFTGm-II-XO/RFTGm-II-RB combos but have never played with the software. Where did you find your software? And do you have a manual? Thanks; Thomas Knox > From: jsternmd@att.net > To: time-nuts@febo.com > Date: Tue, 28 Aug 2012 00:28:27 -0400 > Subject: [time-nuts] Lucent RTGm-II-XO Slow Acquisition > > I have a RTGm-II-XO and it takes quite some time to acquire the minimum 4 > satellites. Using the same Symmetricom antenna with my Thunderbolt, it > acquires 6-8 satellites in 15-20 mins while the RTGm-II-XO takes 60 minutes > and sometimes much longer where I have power cycled it to get it out of > warm-up. On power-up, the red alarm goes off within 15mins as programmed. > I have preset my GPS coordinates using the RS-422 interface and Lucent > software and set the coax length as well. The antenna voltage is correct at > 4.9vdc and the antenna is drawing about 25 ma. The Lucent software shows > correct XO voltages per the manual. Any advice appreciated. > > jerry > _______________________________________________ > 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.

Hi Tom, Thanks for replying. I recently got a pair RFTGm-II-Rb and RFTGm-II-XO for an inexpensive price (less than a T-bolt). They appear late versions but I have not opened them up to get a version or date estimate. I came across the manual and software for these many years ago (~2005) from a website (now defunct) when I was searching for literature on an ATT RFG-RB standard I acquired for my ham radio workbench. I could not get the software to work with the ATT but it works great for the RFTGm's on Windows Vista with compatibility mode set for Win XP (SP2). Based on your feedback I thinkthe issue may be my Symmetricom antennae which I mounted for my T-bolt inside the peak of my attic (it was fast, easy and only some plywood and asphalt shingle between it and open sky :-). Yesterday we had some substantial overcast skies and maybe that plus my inside location (plus 70' of RG-8x) and the Lucent needing a bit more signal just was a bad combination. This morning under clear skies, I rebooted everything and within 30 minutes the RFTGm-II-Rb and RFTGm-II-XO were GPS-locked and working as a pair per the manual. I was pleasantly surprised reading the manual to find that in contrast to some messages on this reflector, the manual says that both the Rb and XO are each GPS disciplined by comparing the phase shift between their 1pps signals. The default is that the Rb is the primary standard while the XO is periodically used to verify and update further disciplining. Only issue for me then is the 10Mhz TP output from the RFTGm-II-Rb is a square wave not sine but I am searching for the best solution to convert this. If you have some suggestion - much appreciated ! Let me know if you want me to send you copies of the RFTG manual and Windows software. Jerry -----Original Message----- From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf Of Tom Knox Sent: Tuesday, August 28, 2012 1:33 AM To: Time-Nuts Subject: Re: [time-nuts] Lucent RTGm-II-XO Slow Acquisition Hi Jerry ; I assume you mean RFTGm-II-XO. The cell sites usually had an Andrew 26dB antenna with a real short coax run. They also had a 40dB antenna option if needed. Unless you have a long coax run the Symmetricom ant should be ideal. I don't think the RFTGm-II-XO lock as quickly the Thundebolt but yours sounds like something is not right. Does the software allow you to set mask angle and PDOP? It could be set to high and be ignoring Sats. It also could possibly be set for a past fixed location. I have a few RFTGm-II-XO/RFTGm-II-RB combos but have never played with the software. Where did you find your software? And do you have a manual? Thanks; Thomas Knox > From: jsternmd@att.net > To: time-nuts@febo.com > Date: Tue, 28 Aug 2012 00:28:27 -0400 > Subject: [time-nuts] Lucent RTGm-II-XO Slow Acquisition > > I have a RTGm-II-XO and it takes quite some time to acquire the > minimum 4 satellites. Using the same Symmetricom antenna with my > Thunderbolt, it acquires 6-8 satellites in 15-20 mins while the > RTGm-II-XO takes 60 minutes and sometimes much longer where I have > power cycled it to get it out of warm-up. On power-up, the red alarm goes off within 15mins as programmed. > I have preset my GPS coordinates using the RS-422 interface and Lucent > software and set the coax length as well. The antenna voltage is > correct at 4.9vdc and the antenna is drawing about 25 ma. The Lucent > software shows correct XO voltages per the manual. Any advice appreciated. > > jerry > _______________________________________________ > 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.