[time-nuts] Auto TBolt TC Adjust

Didier Juges didier at cox.net
Thu Jul 8 02:37:30 UTC 2010


Bob,

It would be easy to start a timer when the TBolt reaches a certain state, and send specific commands after certain times, and restart the sequence if the TBolt loses lock.

The processor's clock has 0.5% accuracy, which should be sufficient.

There is plenty of code space left in the GPSMon processor.

Didier

------------------------ 
Sent from my BlackBerry Wireless thingy while I do other things...

-----Original Message-----
From: Bob Camp <lists at rtty.us>
Sender: time-nuts-bounces at febo.com
Date: Wed, 7 Jul 2010 22:08:33 
To: Discussion of precise time and frequency measurement<time-nuts at febo.com>
Reply-To: Discussion of precise time and frequency measurement
	<time-nuts at febo.com>
Subject: Re: [time-nuts] Auto TBolt TC Adjust

Hi

I suspect that I only need to decode one of the packets and send one of three or four specific strings. I could send them "blind" and hope they work, or actually confirm they took effect. Either way it should fit in a pretty small chip.

Thanks!

Bob


On Jul 7, 2010, at 9:55 PM, Didier Juges wrote:

> That could be done easily with my GPSMon project, just add code :)
> 
> The project decodes the TSIP binary format, so it would not be so hard to decode the packets you need. At the moment, the project does not talk to the TBolt, and I forgot if the Tx routines are in the code. If they are not and someone is interested, I'll send you the code.
> 
> It's open source by the way.
> 
> http://www.ko4bb.com/Timing/GPSMonitor/
> 
> Didier KO4BB
> 
> ------Original Message------
> From: Bob Camp
> Sender: time-nuts-bounces at febo.com
> To: Time-Nuts
> ReplyTo: Time-Nuts
> Subject: [time-nuts] Auto TBolt TC Adjust
> Sent: Jul 7, 2010 8:22 PM
> 
> Hi
> 
>> From looking at the numbers on a set of TBolt's it's apparent that adjusting the time constant after they have been on power for a while is a good idea. Something like:
> 
> Start at 10 seconds until pps is within 10 ns for 5 minutes 
> Run at 50 seconds until the same condition is met
> Bump to 200 seconds, check 
> Bump to 1000 seconds 
> 
> More or less you would be making the TBolt do a dumbed down version of what the Z38xx's do. 
> 
> Before I go out and build up a gizmo to read TSIP and shoot the commands to the TBolt,  I thought I'd see if somebody had already made one of these up. Anybody have one of these already? 
> 
> Thanks!
> 
> Bob
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
> 
> 
> ------------------------ 
> Sent from my BlackBerry Wireless thingy while I do other things...
> _______________________________________________
> time-nuts mailing list -- time-nuts at 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 at febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.


More information about the Time-nuts_lists.febo.com mailing list