Re: [Autopilot] Cheap GPS modules

[Tramm H. <hu...@sw...>]

Mark Newell wrote:
> I flashed using 34057-62.exe because the number 34057
> was on one of the chips.

We have the same version on our chips, but I couldn't find an
exact match yesterday.  I just located it in:

	<ftp://ftp.trimble.com/pub/sct/embedded/bin/cm3_510.zip>

Is this the one that you used?  I'll try reflashing this morning.

> I am trying to do some research on GPS antennas on the
> internet and is the patch antenna supplied with the
> unit active or passive?

I believe, but am not certain, that it is an active antenna
since it receives +5V from the board.

Interestingly, dredging Usenet picks up some details on
the antenna:

# I am having problems with setting up a Trimble SV6-CM for mobile tracking.
# Basically the unit works very well until the antenna comes within one
# to two feet of the GPS board, then it appears to lose the satellites it
# was tracking.

The answer was to use a ground plane.

Trammell
-- 
  -----|----- hu...@sw...                     H 240-476-1373
*>=====[]L\   hu...@ro...               W 240-453-3317
'     -'-`-   http://www.swcp.com/~hudson/                KC5RNF