[time-nuts] Thunderbolt Lives

David C. Partridge david.partridge at dsl.pipex.com
Tue Jul 22 13:17:38 EDT 2008

The self survey will go green after it has completed the survey as will the
stored position.


-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of David Ackrill
Sent: 22 July 2008 17:47
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Thunderbolt Lives

Well, setting up the Trimble software was quite straight forward, and I've
got nearly all Green on the alarms.

The only two yellowed are "Self Survey Activity" and "Stored Possition". 
  I'll do some reading of the manual before I go messing with any of the

Next thing to do is save up for the 10GHz transceiver that this will be used
to keep on frequency, and think about making some form of portable power

Has anyone done any tests as to how far out voltages on the +12 and -12 Volt
lines can go before the Thunderbolt goes out of lock?  One of the problems
with using batteries out in the field is the weight.  However, I guess I
could probably manage a couple of lightweight 12V Gell Cells in series, and
then some voltage regulators to give the 3 rails for the supply.  Seeing
that the power requirement isn't that great on the mains PSU, I would guess
that a well charged, small, pair of gell cells would do?

Dave (G0DJA)

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