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Setting correct date on Trimble Thunderbolt receiver

D
donandarline@gmail.com
Mon, Mar 26, 2018 9:17 PM

Hello all,
I am new to the board and have just received a Trimble Thunderbolt GPS receiver today.
All is working correctly except the date shows Aug 10 1998.
How do set the proper date on this?
I am running TBoltMon to access the unit.
Any help would be appreciated.
Thanks,
Don W9BHI

Hello all, I am new to the board and have just received a Trimble Thunderbolt GPS receiver today. All is working correctly except the date shows Aug 10 1998. How do set the proper date on this? I am running TBoltMon to access the unit. Any help would be appreciated. Thanks, Don W9BHI
TV
Tom Van Baak
Mon, Mar 26, 2018 11:49 PM

Don,

The primary purpose of a Thunderbolt GPSDO is ultra-precise time (1PPS) and frequency (10 MHz), locked to each other, and to UTC. The good news is these two BNC outputs are unaffected by the date issue that you describe. The TBolt is designed to run fine on its own; you typically don't need a PC or control program to operate it.

The bad news is that if you use the Trimble TSIP RS232 interface and if you want the correct date & time then the software needs to be aware of the 1024 week (19.6 year) epoch. This "GPS 1024 week rollover" issue eventually affects many receivers, including the TBolt, but the good news is that simple work-arounds are often available to address the problem.

AFAIK, the Tboltmon.exe program has not been updated. I still use it (when you're dealing with nanoseconds, calendar dates are less important).

Mark's LH program has been updated. See: http://www.ke5fx.com/heather/readme.htm

Didier's LCD date/time display has been updated: http://www.ko4bb.com/Timing/GPSMonitor/kit.php

/tvb

----- Original Message -----
From: donandarline@gmail.com
To: time-nuts@febo.com
Sent: Monday, March 26, 2018 2:17 PM
Subject: [time-nuts] Setting correct date on Trimble Thunderbolt receiver

Hello all,
I am new to the board and have just received a Trimble Thunderbolt GPS receiver today.
All is working correctly except the date shows Aug 10 1998.
How do set the proper date on this?
I am running TBoltMon to access the unit.
Any help would be appreciated.
Thanks,
Don W9BHI


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To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Don, The primary purpose of a Thunderbolt GPSDO is ultra-precise time (1PPS) and frequency (10 MHz), locked to each other, and to UTC. The good news is these two BNC outputs are unaffected by the date issue that you describe. The TBolt is designed to run fine on its own; you typically don't need a PC or control program to operate it. The bad news is that if you use the Trimble TSIP RS232 interface and if you want the correct date & time then the software needs to be aware of the 1024 week (19.6 year) epoch. This "GPS 1024 week rollover" issue eventually affects many receivers, including the TBolt, but the good news is that simple work-arounds are often available to address the problem. AFAIK, the Tboltmon.exe program has *not* been updated. I still use it (when you're dealing with nanoseconds, calendar dates are less important). Mark's LH program *has* been updated. See: http://www.ke5fx.com/heather/readme.htm Didier's LCD date/time display *has* been updated: http://www.ko4bb.com/Timing/GPSMonitor/kit.php /tvb ----- Original Message ----- From: <donandarline@gmail.com> To: <time-nuts@febo.com> Sent: Monday, March 26, 2018 2:17 PM Subject: [time-nuts] Setting correct date on Trimble Thunderbolt receiver > Hello all, > I am new to the board and have just received a Trimble Thunderbolt GPS receiver today. > All is working correctly except the date shows Aug 10 1998. > How do set the proper date on this? > I am running TBoltMon to access the unit. > Any help would be appreciated. > Thanks, > Don W9BHI > _______________________________________________ > 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.
DC
David C. Partridge
Tue, Mar 27, 2018 12:03 AM

AFAIK you can't set the correct date any more - this is the 1024 week rollover problem.

Lady Heather does correct the displayed date, as it knows that the reported date is wrong..

David

-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of donandarline@gmail.com
Sent: 26 March 2018 22:18
To: time-nuts@febo.com
Subject: [time-nuts] Setting correct date on Trimble Thunderbolt receiver

Hello all,
I am new to the board and have just received a Trimble Thunderbolt GPS receiver today.
All is working correctly except the date shows Aug 10 1998.
How do set the proper date on this?
I am running TBoltMon to access the unit.
Any help would be appreciated.
Thanks,
Don W9BHI


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.

AFAIK you can't set the correct date any more - this is the 1024 week rollover problem. Lady Heather does correct the displayed date, as it knows that the reported date is wrong.. David -----Original Message----- From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of donandarline@gmail.com Sent: 26 March 2018 22:18 To: time-nuts@febo.com Subject: [time-nuts] Setting correct date on Trimble Thunderbolt receiver Hello all, I am new to the board and have just received a Trimble Thunderbolt GPS receiver today. All is working correctly except the date shows Aug 10 1998. How do set the proper date on this? I am running TBoltMon to access the unit. Any help would be appreciated. Thanks, Don W9BHI _______________________________________________ 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.
CC
Chris Caudle
Tue, Mar 27, 2018 1:24 AM

On Mon, March 26, 2018 6:49 pm, Tom Van Baak wrote:

The bad news is that if you use the Trimble TSIP RS232 interface and if
you want the correct date & time then the software needs to be aware of
the 1024 week (19.6 year) epoch. This "GPS 1024 week rollover" issue

Many people do not use the date directly, it is served to other machines
via other software such as ntpd.  You should be able to configure ntpd to
add an appropriate offset such that the correct date is served.
If using directly (e.g. a machine is logging data and communicating
directly with the Tbolt to get date stamps) you would have to add the
equivalent offset yourself.

--
Chris Caudle

On Mon, March 26, 2018 6:49 pm, Tom Van Baak wrote: > The bad news is that if you use the Trimble TSIP RS232 interface and if > you want the correct date & time then the software needs to be aware of > the 1024 week (19.6 year) epoch. This "GPS 1024 week rollover" issue Many people do not use the date directly, it is served to other machines via other software such as ntpd. You should be able to configure ntpd to add an appropriate offset such that the correct date is served. If using directly (e.g. a machine is logging data and communicating directly with the Tbolt to get date stamps) you would have to add the equivalent offset yourself. -- Chris Caudle
NS
Nick Sayer
Wed, Mar 28, 2018 2:27 AM

In general, I believe whether you can work around the 1024 week problem and if so, how, tends to be a receiver-by-receiver thing (or at least manufacturer-by-manufacturer).

I’m most familiar with the SkyTraq Venus838, and those have a sliding window system where you set a “reference date” and the receiver will always assume that date is inside the window. At least once every 1024 weeks, you’re supposed to set that to the current date (it’s a binary command and they have software that will do this for you), and then you’ll get another 1024 weeks without having to do anything.

My GPSDOs don’t have a TX path from the controller to the receiver, but you can talk to the receiver directly with the diagnostic connector and update the reference date that way. My GPS Clocks will set the reference date once a year (if the current year != the reference date year, then it is set, and this check is made once an hour. Having the date correct matters for DST decisions).

On Mar 26, 2018, at 5:03 PM, David C. Partridge david.partridge@perdrix.co.uk wrote:

AFAIK you can't set the correct date any more - this is the 1024 week rollover problem.

Lady Heather does correct the displayed date, as it knows that the reported date is wrong..

David

-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of donandarline@gmail.com
Sent: 26 March 2018 22:18
To: time-nuts@febo.com
Subject: [time-nuts] Setting correct date on Trimble Thunderbolt receiver

Hello all,
I am new to the board and have just received a Trimble Thunderbolt GPS receiver today.
All is working correctly except the date shows Aug 10 1998.
How do set the proper date on this?
I am running TBoltMon to access the unit.
Any help would be appreciated.
Thanks,
Don W9BHI


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.

In general, I believe whether you can work around the 1024 week problem and if so, how, tends to be a receiver-by-receiver thing (or at least manufacturer-by-manufacturer). I’m most familiar with the SkyTraq Venus838, and those have a sliding window system where you set a “reference date” and the receiver will always assume that date is inside the window. At least once every 1024 weeks, you’re supposed to set that to the current date (it’s a binary command and they have software that will do this for you), and then you’ll get another 1024 weeks without having to do anything. My GPSDOs don’t have a TX path from the controller to the receiver, but you can talk to the receiver directly with the diagnostic connector and update the reference date that way. My GPS Clocks will set the reference date once a year (if the current year != the reference date year, then it is set, and this check is made once an hour. Having the date correct matters for DST decisions). > On Mar 26, 2018, at 5:03 PM, David C. Partridge <david.partridge@perdrix.co.uk> wrote: > > AFAIK you can't set the correct date any more - this is the 1024 week rollover problem. > > Lady Heather does correct the displayed date, as it knows that the reported date is wrong.. > > David > > -----Original Message----- > From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of donandarline@gmail.com > Sent: 26 March 2018 22:18 > To: time-nuts@febo.com > Subject: [time-nuts] Setting correct date on Trimble Thunderbolt receiver > > Hello all, > I am new to the board and have just received a Trimble Thunderbolt GPS receiver today. > All is working correctly except the date shows Aug 10 1998. > How do set the proper date on this? > I am running TBoltMon to access the unit. > Any help would be appreciated. > Thanks, > Don W9BHI > _______________________________________________ > 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.