[time-nuts] Serial port splitter s/w
tic-toc at bodosom.net
Wed Feb 26 13:24:10 EST 2014
On Wed, Feb 26, 2014 at 12:32 PM, Chris Albertson <albertson.chris at gmail.com
> You can NOT control a GPS from two ports. Both NTP and LH will try to
> send commands to the GPS.
Actually the Palisades driver doesn't send commands to the Thunderbolt. It
sends a single invalid command requesting auto messages and then parses the
data stream. As long as primary timing packets are received it works. A
Thunderbolt will wake up doing the right thing and if not I believe LH will
correctly initialize it.
The deeper point is correct and the Trimble devices I have experience with
have ~100ms of jitter.
Props to Jackson Labs -- my Fury has O(10) microseconds of jitter using
NMEA messages. If only they were $100.
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