[time-nuts] Trimble Thunderbolt 1pps

[Hal Murray]

> Does the Trimble Thunderbolt provide 1pps on DCD of the RS232 interface?

No, but you can open it up and add a wire.  That will give you CMOS rather 
than RS232, but it works.  (Or at least, it works for me and I've never heard 
a good story where it didn't work.)

One problem is that the PPS signal is narrow.  Some PCs may not be able to 
catch it.  You can use the FatPPS from TAPR:
  http://www.tapr.org/kits_fatpps.html
(It needs power.  You can probably find that in the TBolt.  I haven't done 
it.)

I added a diode and R/C.  That was good enough for the PC I was using.


-- 
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