[time-nuts] SiRF GPS receivers: GlobalSat MR-350P
chris.kuethe at gmail.com
Wed Jan 23 13:12:01 EST 2008
On Jan 23, 2008 1:44 AM, Hal Murray <hmurray at megapathdsl.net> wrote:
> The context for this query is that I'm looking for inexpensive GPS units with
> a PPS output to connect up to ntpd.
> Is anybody familiar with these units?
I've used other globalsat receivers based on both the SiRFstarII and
> I just wired one up. The PPS signal is only 1 microsecond wide.
Yep. That's consistent with the description I've seen of the sirf3 1PPS signal.
> The PPS from my Z3801A is 10 microseconds wide. I can deal with that. The
> extra factor of 10 is inconvenient. (at least so far)
> The Garmin GPS 18 LVC has a command to adjust the PPS pulse width, but
> that's at the granularity of 20 ms rather than the microsecond range. I just
> scanned the SiRF binary protocol manual and NMEA manual and didn't see
> anything. (But I might have missed it.)
There is no command to do that. Sorry.
GDB has a 'break' feature; why doesn't it have 'fix' too?
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