S
Stan
Sun, Feb 2, 2025 9:39 PM
I am rearranging my lab and reluctantly had to unplug both of my 58503Bs,
which had both been working perfectly. When I powered them up after about an
hour, they both started up, passed their self-tests, and went into the
satellite acquisition mode.
Neither had acquired any satellites after several hours, so I used SatStat
on one of them to load the present UTC time, date, latitude, longitude, and
elevation, but even after an hour, it had still not acquired any satellites.
I then initiated a survey, but an hour later the survey is still 0%
completed.
Both instruments have the original GPS modules installed.
Any ideas?
Thanks,
Stan
I am rearranging my lab and reluctantly had to unplug both of my 58503Bs,
which had both been working perfectly. When I powered them up after about an
hour, they both started up, passed their self-tests, and went into the
satellite acquisition mode.
Neither had acquired any satellites after several hours, so I used SatStat
on one of them to load the present UTC time, date, latitude, longitude, and
elevation, but even after an hour, it had still not acquired any satellites.
I then initiated a survey, but an hour later the survey is still 0%
completed.
Both instruments have the original GPS modules installed.
Any ideas?
Thanks,
Stan
P
Purplxed
Sun, Feb 2, 2025 11:30 PM
Are both of the units fed from the same antenna? If so, that sounds like
your failure point is probably in your feed cable, or the antenna
itself. That or the unit providing the DC bias to the antenna is no
longer doing so.
Nick
On 2/2/25 13:39, Stan via time-nuts wrote:
I am rearranging my lab and reluctantly had to unplug both of my 58503Bs,
which had both been working perfectly. When I powered them up after about an
hour, they both started up, passed their self-tests, and went into the
satellite acquisition mode.
Neither had acquired any satellites after several hours, so I used SatStat
on one of them to load the present UTC time, date, latitude, longitude, and
elevation, but even after an hour, it had still not acquired any satellites.
I then initiated a survey, but an hour later the survey is still 0%
completed.
Both instruments have the original GPS modules installed.
Any ideas?
Thanks,
Stan
time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe send an email to time-nuts-leave@lists.febo.com
Are both of the units fed from the same antenna? If so, that sounds like
your failure point is probably in your feed cable, or the antenna
itself. That or the unit providing the DC bias to the antenna is no
longer doing so.
Nick
On 2/2/25 13:39, Stan via time-nuts wrote:
> I am rearranging my lab and reluctantly had to unplug both of my 58503Bs,
> which had both been working perfectly. When I powered them up after about an
> hour, they both started up, passed their self-tests, and went into the
> satellite acquisition mode.
>
>
>
> Neither had acquired any satellites after several hours, so I used SatStat
> on one of them to load the present UTC time, date, latitude, longitude, and
> elevation, but even after an hour, it had still not acquired any satellites.
> I then initiated a survey, but an hour later the survey is still 0%
> completed.
>
>
>
> Both instruments have the original GPS modules installed.
>
>
>
> Any ideas?
>
>
>
> Thanks,
> Stan
>
> _______________________________________________
> time-nuts mailing list -- time-nuts@lists.febo.com
> To unsubscribe send an email to time-nuts-leave@lists.febo.com
BC
Bob Camp
Mon, Feb 3, 2025 12:45 AM
Hi
How long have they been power down?
Bob
On Feb 2, 2025, at 4:39 PM, Stan via time-nuts time-nuts@lists.febo.com wrote:
I am rearranging my lab and reluctantly had to unplug both of my 58503Bs,
which had both been working perfectly. When I powered them up after about an
hour, they both started up, passed their self-tests, and went into the
satellite acquisition mode.
Neither had acquired any satellites after several hours, so I used SatStat
on one of them to load the present UTC time, date, latitude, longitude, and
elevation, but even after an hour, it had still not acquired any satellites.
I then initiated a survey, but an hour later the survey is still 0%
completed.
Both instruments have the original GPS modules installed.
Any ideas?
Thanks,
Stan
time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe send an email to time-nuts-leave@lists.febo.com
Hi
How long have they been power down?
Bob
> On Feb 2, 2025, at 4:39 PM, Stan via time-nuts <time-nuts@lists.febo.com> wrote:
>
> I am rearranging my lab and reluctantly had to unplug both of my 58503Bs,
> which had both been working perfectly. When I powered them up after about an
> hour, they both started up, passed their self-tests, and went into the
> satellite acquisition mode.
>
>
>
> Neither had acquired any satellites after several hours, so I used SatStat
> on one of them to load the present UTC time, date, latitude, longitude, and
> elevation, but even after an hour, it had still not acquired any satellites.
> I then initiated a survey, but an hour later the survey is still 0%
> completed.
>
>
>
> Both instruments have the original GPS modules installed.
>
>
>
> Any ideas?
>
>
>
> Thanks,
> Stan
>
> _______________________________________________
> time-nuts mailing list -- time-nuts@lists.febo.com
> To unsubscribe send an email to time-nuts-leave@lists.febo.com
TV
Tom Van Baak
Mon, Feb 3, 2025 1:15 AM
Stan -- It's helpful record syst:stat? output from each one before
changing antenna cables / moving / power cycling. Number of sats, SS
(signal strength), EFC percent, are useful as diagnostics. Are you sure
it wasn't already in holdover for days or even years prior to the move?
How close to the rail was the EFC before the move?
Anyway, after the change, record some syst:stat? again and compare. Are
you sure the move didn't change the antenna cable(s) in any way? Maybe
temporarily move the antenna feed into a known good working GPS receiver
to verify the N-connector feed is ok and the SNR is roughly the same as
it was before.
If it's the original GPS module (which is ok, even preferred for
collectors' vintage gear) the battery cell is likely zero by now, so all
current date/time/ephemeris data was lost during the move. Using satstat
to reset date & time is a good idea but I think there's a s/w or h/w
power cycle required too.
Hal -- you had a special order of setting data/time, reset, power cycle
to get your hp SmartClock's to acquire faster and also land in the
correct 19.6 year cycle. Do you remember it?
If you don't get it going in a day, I'll dig out a 58503B here that's
been idle for ten years and try to repro your condition.
/tvb
On 2/2/2025 1:39 PM, Stan wrote:
I am rearranging my lab and reluctantly had to unplug both of my
58503Bs, which had both been working perfectly. When I powered them up
after about an hour, they both started up, passed their self-tests,
and went into the satellite acquisition mode.
Neither had acquired any satellites after several hours, so I used
SatStat on one of them to load the present UTC time, date, latitude,
longitude, and elevation, but even after an hour, it had still not
acquired any satellites. I then initiated a survey, but an hour later
the survey is still 0% completed.
Both instruments have the original GPS modules installed.
Any ideas?
Thanks,
Stan
Stan -- It's helpful record syst:stat? output from each one before
changing antenna cables / moving / power cycling. Number of sats, SS
(signal strength), EFC percent, are useful as diagnostics. Are you sure
it wasn't already in holdover for days or even years prior to the move?
How close to the rail was the EFC before the move?
Anyway, after the change, record some syst:stat? again and compare. Are
you sure the move didn't change the antenna cable(s) in any way? Maybe
temporarily move the antenna feed into a known good working GPS receiver
to verify the N-connector feed is ok and the SNR is roughly the same as
it was before.
If it's the original GPS module (which is ok, even preferred for
collectors' vintage gear) the battery cell is likely zero by now, so all
current date/time/ephemeris data was lost during the move. Using satstat
to reset date & time is a good idea but I think there's a s/w or h/w
power cycle required too.
Hal -- you had a special order of setting data/time, reset, power cycle
to get your hp SmartClock's to acquire faster and also land in the
correct 19.6 year cycle. Do you remember it?
If you don't get it going in a day, I'll dig out a 58503B here that's
been idle for ten years and try to repro your condition.
/tvb
On 2/2/2025 1:39 PM, Stan wrote:
>
> I am rearranging my lab and reluctantly had to unplug both of my
> 58503Bs, which had both been working perfectly. When I powered them up
> after about an hour, they both started up, passed their self-tests,
> and went into the satellite acquisition mode.
>
> Neither had acquired any satellites after several hours, so I used
> SatStat on one of them to load the present UTC time, date, latitude,
> longitude, and elevation, but even after an hour, it had still not
> acquired any satellites. I then initiated a survey, but an hour later
> the survey is still 0% completed.
>
> Both instruments have the original GPS modules installed.
>
> Any ideas?
>
> Thanks,
> Stan
>
O
ota
Mon, Feb 3, 2025 12:22 PM
Nice to meet you, Stan
English is not my native language, so this is a machine translation. Sorry if it's hard to read.
I recently found myself in a similar situation to you. I don't know if it will help you, but I'll expand on the steps I took. I was able to successfully capture satellites by
running the following two commands in order.
- *TST?
- :GPS:INIT:DATE yyyy,mm,dd
Even if you don't run the first *TST? and only run the second one and set the correct date, satellite tracking will not start. You must run the first command.
By running these two commands, satellite tracking will start (it doesn't matter if the time is not accurate at this time. The system will automatically set the correct time when
satellite tracking starts based on the date set, taking into account GPS rollover).
wota
On 2025/02/03 6:39, Stan via time-nuts wrote:
I am rearranging my lab and reluctantly had to unplug both of my 58503Bs,
which had both been working perfectly. When I powered them up after about an
hour, they both started up, passed their self-tests, and went into the
satellite acquisition mode.
Neither had acquired any satellites after several hours, so I used SatStat
on one of them to load the present UTC time, date, latitude, longitude, and
elevation, but even after an hour, it had still not acquired any satellites.
I then initiated a survey, but an hour later the survey is still 0%
completed.
Both instruments have the original GPS modules installed.
Any ideas?
Thanks,
Stan
time-nuts mailing list -- time-nuts@lists.febo.com
To unsubscribe send an email to time-nuts-leave@lists.febo.com
Nice to meet you, Stan
English is not my native language, so this is a machine translation. Sorry if it's hard to read.
I recently found myself in a similar situation to you. I don't know if it will help you, but I'll expand on the steps I took. I was able to successfully capture satellites by
running the following two commands in order.
1. *TST?
2. :GPS:INIT:DATE yyyy,mm,dd
Even if you don't run the first *TST? and only run the second one and set the correct date, satellite tracking will not start. You must run the first command.
By running these two commands, satellite tracking will start (it doesn't matter if the time is not accurate at this time. The system will automatically set the correct time when
satellite tracking starts based on the date set, taking into account GPS rollover).
wota
On 2025/02/03 6:39, Stan via time-nuts wrote:
> I am rearranging my lab and reluctantly had to unplug both of my 58503Bs,
> which had both been working perfectly. When I powered them up after about an
> hour, they both started up, passed their self-tests, and went into the
> satellite acquisition mode.
>
>
>
> Neither had acquired any satellites after several hours, so I used SatStat
> on one of them to load the present UTC time, date, latitude, longitude, and
> elevation, but even after an hour, it had still not acquired any satellites.
> I then initiated a survey, but an hour later the survey is still 0%
> completed.
>
>
>
> Both instruments have the original GPS modules installed.
>
>
>
> Any ideas?
>
>
>
> Thanks,
> Stan
>
> _______________________________________________
> time-nuts mailing list -- time-nuts@lists.febo.com
> To unsubscribe send an email to time-nuts-leave@lists.febo.com
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大田 弘樹
jo3wlj@gmail.com
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