[time-nuts] Accurate Thunderbolt position

[David C. Partridge]

Mark,

Did you save the eprom segment after setting after changing the number of
survey points.  Mine (rev 3.0) knows it was told 10000 survey points.

PS Still waiting for your reply about the SG504 levelling head kits.

Cheers
Dave

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Mark Sims
Sent: 16 July 2009 18:39
To: time-nuts at febo.com
Subject: [time-nuts] Accurate Thunderbolt position


More adventures in the subtle wonders of Thunderbolt firmware...

My idea to get a Thunderbolt to accept a high precision fixed position by
putting it into 3D fix mode,  waiting for it to generate a fix sufficiently
close to the desired location,  and then putting it into position hold
mode...  is a bust.   Position hold mode reverts to the last saved/surveyed
position.

Ok,  so let's try doing single fix surveys until one comes close to the
desired position...  no joy.  The Tbolt documentation says that you can do
surveys from 1 to 2**32-1 fixes...  nope.  Firmware rev 2.22 only seems to
do 1400 point surveys.  Rev 3.0 only does 2000 point surveys.  The units
seem to ignore the fix count parameter in the "set survey parameters"
command.   Does anybody know how to set the self-survey fix count value?
----------------------------------------


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