The second unit locked up and showed 4 satellites at the time I looked. Next step is to replace the battery and see if it saves the setup. In particular, I will be interested in seeing if it stores the date OK. I found in the first unit what looked like a bad solder joint, but after fixing that it still shows an "Open" Antenna. Unless I have a major brain bleep, it will be relegated to Organ Donor status. But, one out of two ain't bad !! 73, Dick, W1KSZ Sent from Outlook<http://aka.ms/weboutlook> ________________________________ From: Richard Solomon Sent: Thursday, May 24, 2018 3:46:16 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] TrueTime XL-AK Issues Well, I think one unit has had it. It says the Antenna is open. If I connect the coax to the second unit, it says the Antenna is OK. A look at the board reveals nothing amiss, but I'll put it aside and look closer later. If nothing else it becomes an Organ Donor. The second unit is doing a sky survey now. I'll give it a few more hours to see what develops. Thanks, Dick, W1KSZ Sent from Outlook<http://aka.ms/weboutlook> ________________________________ From: time-nuts <time-nuts-bounces@febo.com> on behalf of paul swed <paulswedb@gmail.com> Sent: Wednesday, May 23, 2018 6:39:05 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] TrueTime XL-AK Issues Great to hear let us know how it turns out. Regards On Wed, May 23, 2018 at 4:58 PM, Richard Solomon <w1ksz@outlook.com> wrote: > In further button pushing, I found the Date was 1998 !! So, I manually > reset the Date > > and Time and it's now doing a Satellite search. > > > The previous measurements must have been some artifact of Holdover. > > > One is now merrily searching, I'll let it run for a while. > > > And, I think you are correct, the Battery must surely be dead by now. I'll > > look into replacing it. > > > Thanks for replying, > > > 73, Dick, W1KSZ > > > Sent from Outlook<http://aka.ms/weboutlook> > ________________________________ > From: time-nuts <time-nuts-bounces@febo.com> on behalf of paul swed < > paulswedb@gmail.com> > Sent: Wednesday, May 23, 2018 12:56:46 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] TrueTime XL-AK Issues > > Wow > They actually came up. A site survey can take some 20 hours. > There should be some LED indicator that says the status is locking. > Let them run a day or two. > If there is a LI battery to retain information that may be long gone. > Replacing that would give you a fatser start. > Had to do this on some Odetics receivers. > Good luck > Paul. > > On Wed, May 23, 2018 at 3:26 PM, Bob kb8tq <kb8tq@n1k.org> wrote: > > > Hi > > > > My guess would be that they are not in a mode that allows them to lock. > > Some > > GPSDO’s require a “start” command. Others hold off locking until a site > > survey > > is complete ( or they have verified the last survey is correct ). > > > > Bob > > > > > On May 23, 2018, at 1:31 PM, Richard Solomon <w1ksz@outlook.com> > wrote: > > > > > > I have had two of these sitting on the shelf for years. Today I decided > > to see if they work. > > > > > > It's a slow week !! > > > > > > > > > I hooked them up to my external GPS Antenna through my Symmetricon > > Splitter and > > > > > > looked at the 10 MHz output on my HP 5334B (reference input derived > from > > a Trimble > > > > > > T-Bolt). > > > > > > > > > They both show a number of Satellites, but one reads 4.7 Hz low while > > the other reads > > > > > > 1.3 Hz low. I expected better. > > > > > > > > > Any thoughts on what would cause such a large deviation from 10 Mhz ? > > > > > > > > > Thanks for any replies, > > > > > > > > > 73, Dick, W1KSZ > > > > > > > > > Sent from Outlook<http://aka.ms/weboutlook> > > > _______________________________________________ > > > 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. > > > _______________________________________________ > 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. > _______________________________________________ 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.

Dick Thats great progress. Certainly its worth digging a bit deeper see whats up on the antenna. The way they sense the antenna is usually a single transistor sensing the current and pulling a line high or low. The micro senses that and reacts. It usually really easy to figure the scheme out. Regards Paul WB8TSL On Fri, May 25, 2018 at 5:19 PM, Richard Solomon <w1ksz@outlook.com> wrote: > The second unit locked up and showed 4 satellites at the time I looked. > > Next step is to replace the battery and see if it saves the setup. > > > In particular, I will be interested in seeing if it stores the date OK. > > > I found in the first unit what looked like a bad solder joint, but after > > fixing that it still shows an "Open" Antenna. Unless I have a major > > brain bleep, it will be relegated to Organ Donor status. > > > But, one out of two ain't bad !! > > > 73, Dick, W1KSZ > > > Sent from Outlook<http://aka.ms/weboutlook> > ________________________________ > From: Richard Solomon > Sent: Thursday, May 24, 2018 3:46:16 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] TrueTime XL-AK Issues > > > Well, I think one unit has had it. It says the Antenna is open. If I > > connect the coax to the second unit, it says the Antenna is OK. > > > A look at the board reveals nothing amiss, but I'll put it aside > > and look closer later. If nothing else it becomes an Organ Donor. > > > The second unit is doing a sky survey now. I'll give it a few more > > hours to see what develops. > > > Thanks, Dick, W1KSZ > > > Sent from Outlook<http://aka.ms/weboutlook> > ________________________________ > From: time-nuts <time-nuts-bounces@febo.com> on behalf of paul swed < > paulswedb@gmail.com> > Sent: Wednesday, May 23, 2018 6:39:05 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] TrueTime XL-AK Issues > > Great to hear let us know how it turns out. > Regards > > On Wed, May 23, 2018 at 4:58 PM, Richard Solomon <w1ksz@outlook.com> > wrote: > > > In further button pushing, I found the Date was 1998 !! So, I manually > > reset the Date > > > > and Time and it's now doing a Satellite search. > > > > > > The previous measurements must have been some artifact of Holdover. > > > > > > One is now merrily searching, I'll let it run for a while. > > > > > > And, I think you are correct, the Battery must surely be dead by now. > I'll > > > > look into replacing it. > > > > > > Thanks for replying, > > > > > > 73, Dick, W1KSZ > > > > > > Sent from Outlook<http://aka.ms/weboutlook> > > ________________________________ > > From: time-nuts <time-nuts-bounces@febo.com> on behalf of paul swed < > > paulswedb@gmail.com> > > Sent: Wednesday, May 23, 2018 12:56:46 PM > > To: Discussion of precise time and frequency measurement > > Subject: Re: [time-nuts] TrueTime XL-AK Issues > > > > Wow > > They actually came up. A site survey can take some 20 hours. > > There should be some LED indicator that says the status is locking. > > Let them run a day or two. > > If there is a LI battery to retain information that may be long gone. > > Replacing that would give you a fatser start. > > Had to do this on some Odetics receivers. > > Good luck > > Paul. > > > > On Wed, May 23, 2018 at 3:26 PM, Bob kb8tq <kb8tq@n1k.org> wrote: > > > > > Hi > > > > > > My guess would be that they are not in a mode that allows them to lock. > > > Some > > > GPSDO’s require a “start” command. Others hold off locking until a site > > > survey > > > is complete ( or they have verified the last survey is correct ). > > > > > > Bob > > > > > > > On May 23, 2018, at 1:31 PM, Richard Solomon <w1ksz@outlook.com> > > wrote: > > > > > > > > I have had two of these sitting on the shelf for years. Today I > decided > > > to see if they work. > > > > > > > > It's a slow week !! > > > > > > > > > > > > I hooked them up to my external GPS Antenna through my Symmetricon > > > Splitter and > > > > > > > > looked at the 10 MHz output on my HP 5334B (reference input derived > > from > > > a Trimble > > > > > > > > T-Bolt). > > > > > > > > > > > > They both show a number of Satellites, but one reads 4.7 Hz low while > > > the other reads > > > > > > > > 1.3 Hz low. I expected better. > > > > > > > > > > > > Any thoughts on what would cause such a large deviation from 10 Mhz ? > > > > > > > > > > > > Thanks for any replies, > > > > > > > > > > > > 73, Dick, W1KSZ > > > > > > > > > > > > Sent from Outlook<http://aka.ms/weboutlook> > > > > _______________________________________________ > > > > 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. > > > > > _______________________________________________ > > 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. > > > _______________________________________________ > 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. >