[time-nuts] Thunderbolt no usable sats.

Thomas S. Knutsen la3pna at gmail.com
Sun Jun 12 00:18:10 UTC 2011

I bougth an Thunderbolt off E-bay some time ago, to use as reference
for my spectrum analyzer and signal generators.
I had it connected up with a couple of power supplies and it worked as
it should.
Today I put together an voltage inverter to get the -12V to the GPS in
order to use it with an single 12V power supply.

When re-starting the GPS, it did an servey but did not find any usable
satelites, I did think that it just needed some time, and left it on
for a couple of hours. It still show no usable sats.

When monitoring the GPS with Lady Heather the clock show an time, but
it states no usable sats and none are visible in the map.
The GPS antenna is in the attic and have approx 25dB gain (with cable loss).

Is there any known issues with this? I did look through the archives
but found nothing.

Is the -12V used for more than the RS-232? if not, would it be
possible to replace it with an other type that don't ned -12V?



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