[tacgps] TAC-2 Oncore serial

[Thomas Laus]

Pete Ashdown [pashdown at xmission.com] wrote:
> 
> Shouldn't ntpd be able to do this?  My old Linux 2.4 box had no problem
> communicating with the TAC-2 Oncore, but I don't see any reference to
> "@@Cg" in the refclock_oncore.c code.  I've been using minicom (9600/8N1)
> to try and communicate with it, and @@Cg doesn't appear to do anything. 
> I've tried switching the TX/RX via JP1 and still can't get anything to
> work.  I also tested each pin on the cable today and it all looks good. 
> Hair pulling problem!
> 
Pete:

The current Oncore maintainer, Reg Clemens, is not a big FreeBSD user
and mostly concentrates on the Oncore receivers that were made later
than the VP.  The Oncores that were 'cold started' without a battery
for the almanac and some other parameters were the only ones that
needed to receive the @@Cg command to bring them out of the idle
mode.  Most of the Motorola customers purchased the Oncore VP with the
builtin nicad battery and were initialized at the factory.

Do you have access to a PC that can run either WinOncore 12 or Russ
Hamblin's TAC32?  Have you issued the @@Cg command?  What model Oncore
are you using?  As far as I know the GT, UT and MT units don't require
the @@Cg command.  Only the VP and maybe the VT had an idle mode.

Tom KH6ILT


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