[ntp:questions] How to debug PPS?

Steve Kostecke kostecke at ntp.org
Wed May 5 16:16:26 UTC 2010


On 2010-05-05, Mr Dave Baxter <g8kbv at uko2.co.uk> wrote:

> Indeed, but is GPGGA the correct sentence for NTPD to use? Mine is set
> for GPRMC & works just fine.

http://doc.ntp.org/4.2.6/drivers/driver20.html

| Description
| 
| This driver supports GPS receivers with the $GPRMC, $GPGLL, $GPGGA,
| $GPZDA, and $GPZDG NMEA sentences by default.

[snip]

| The driver expects the receiver to be set up to transmit at least one
| supported sentence every second.

[snip]

| Specific GPS sentences and bitrates may be selected by setting bits of
| the 'mode' in the server configuration line:
|   server 127.127.20.x mode X
|     bit 0 - process $GPMRC    (value = 1)
|     bit 1 - process $GPGGA    (value = 2)
|     bit 2 - process $GPGLL    (value = 4)
|     bit 4 - process $GPZDA or $GPZDG    (value = 8)

Any one of the supported sentences will work.

-- 
Steve Kostecke <kostecke at ntp.org>
NTP Public Services Project - http://support.ntp.org/




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