[LinuxPPS] gps_nmea error

[Udo van den Heuvel]

Ritter, Nicholas wrote:
> I think I have problems with the build and configuration of the box. I
> am going to start over and see where it leads me. I noticed that ntp has
> it's own gps driver, should I still apply a patch?

What driver? WHat patch?

> BTW - does anyone have suggestions on PC hardware that makes a good NTP
> server?

Any 386SX16 or up?

> I have budget to buy a computer for this if needed, but I have
> not found a hardware buildout that assurs better clock stability than
> another, yet I have read multiple sources that said that some
> motherboards are good and some are bad, but that is hit or miss. I don't
> have budget for hit/miss and was looking to see if anyone had
> suggestions on a vendor (HP vs. Lenovo vs. Dell, etc.)

Do A brands cater for clock stability?
I thought the software PLL was to compensate for that.

> Also, When I attached minicom to the serial port, I see the GPS data

NMEA 0183?

> coming in, should I see something else?

If PPS: Carrier Detect lighting on and off?

> I don't know what to look for to
> actually "see" the PPS pulse. I reduced the number of sentences sent by
> my Garmin 18 LVC to to just the three time related sentences, despite
> NTP only paying attention to the one sentence.

One is enough.
See the info at the botrtom of
http://www.eecis.udel.edu/~mills/ntp/html/drivers/driver20.html.

> Could the DATUM setting and NMEA version setting of the GPS have an
> impact? In that NTP would not be able to parse a particular datum string
> format?

?

Kind regards,
Udo