[time-nuts] TrueTime XL-AK Issues

Richard Solomon w1ksz at outlook.com
Wed May 23 16:58:38 EDT 2018


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 at febo.com> on behalf of paul swed <paulswedb at 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 at 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 at 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>
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