[time-nuts] thunerbolt, 2 problems

[Brian Lloyd]

On Thu, Jan 16, 2020 at 9:20 PM Bill Beam <wbeam at gci.net> wrote:

> Brian,
> LH can do this.  Issue the command "p" to bring up the PPS control menu.
>

Thank you. LH does so much but finding the right command is a challenge.

I did finally find a copy of tboltmon.exe. That and LH both report that
1pps is turned on. Nothing coming out. The Tbolt is locked and 10MHz is
within range when compared with my other GPSDOs and my Rb. So it appears
that the 1pps has failed. It appears that the 74AC04 is being used as a
buffer to drive the output. I am seeing no pulse on the inputs or outputs
of that chip so the 1pps is lost somewhere else.

Does anyone have a schematic that I can use to trace back the 1pps?


> On Thu, 16 Jan 2020 20:44:43 -0600, Brian Lloyd wrote:
>
> >After quite some time I dragged out my Tbolt and fired it up. Comes up
> >OK. Lady Heather is happy. 10MHz is spot on (after an hour or so).
> >Problem is, 1pps is missing. 1pps is enabled (or appears to be).
> >Suggestions?
>
> >I am running Trimble Visual Timing Studio 2.03.12. It seems to know
> >about the Thunderbolt-E but not the original thunderbolt. Not sure it
> >will do the right thing. Does anyone have an older copy of the program
> >for configuring the T-bolt?
>
> >Thanks in advance.
>
> >--
>
>
> >n++ <https://www.lloyd.aero>
>
> >Brian Lloyd
> >706 Flightline
> >Spring Branch, TX 78070
> >brian at lloyd.aero <mailto://brian@lloyd.aero>
> >+1.210.802.8359
>
>
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>
> Bill Beam
> NL7F
>
>
>
>
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-- 



Brian Lloyd
706 Flightline
Spring Branch, TX 78070
brian at lloyd.aero
+1.210.802-8FLY (1.210.802-8359)