[time] garmin gps25-hvs questions
Sat Dec 4 17:00:53 UTC 2004
I thought I would try to get my GPS rx working this weekend - that is
working in the sense of proving it can pick up some signal, and talk
to the computer, rather than optimizing the antenna position or
worrying about calibrating for cable delays, etc. It is a Garmin
GPS25-HVS model (6-40 volt, rs232 output).
A couple of questions -
1) how do I set the baud rate to 4800 on /dev/gps1? or /dev/ttyS1
(machine is Debian Linux) Or do I not need to, is it done
automatically by the ntp refclock driver?
2) Do I have to do anything special to the PPS output line in terms of
buffering, or do I just connect to the DCD pin? or some other pin?
3) If I connect all the unused pins on the serial port together via
diodes, is there enough power available to run the GPS rx (1W, 80mA)?
Or do I need to temporarily run it off a 12v sealed lead/acid battery
I have lying around?
Distributed Proofreaders: http://www.pgdp.net
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