Hi, I use Debian 3.0, the kernel is 2.4.27 i686. I use pps-clock 2-2 to catching PPS signal and synchronize the node with ntp-4.1.0-8. Besides the node have a DAG card 3.6GE that catching PPS signal too, and this card have a tool called dagpps that get information about the length of the pulse, for example for a good node I get:
on 959616, off 9040384 Positive pulse, cabling is correct. Pulse length about 95962 microseconds but in this case I get on 6, off 9999994 Positive pulse, cabling is correct. Pulse length about 1 microseconds. I do not know other way to check pps signal. The DAG card received the PPS singnal, but seem that it is short. I have tried to lengthen the signal of GPS but I do not get it. The GPS is garmin 35 Ana El mar, 16-01-2007 a las 16:12 +0100, Tim Lundström escribió: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Hi again, > > I took a closer look at your mail and then I saw that you are using > 127.127.28.0 as refclock. If I remember correctly 127.127.28.0 referes > to the NMEA output of gpsd. The PPS pulse is 127.127.28.1. Are you sure > that gpsd is reading your GPS as all? It can be checked by the programs > distributed along with gpsd such as xgps. > > /Tim > > Tim Lundström wrote: > > Hi, > > > > Could you please tell us a little about your hardware? What software are > > you using for catching the PPS signal? What is your configuration? > > > > - From your information I can't tell what's wrong. Are you sure you are > > recieving PPS signals? Are you sure you are recieving them on the right > > pin? Are you sure the GPS is sending PPS signals? The GPS needs a good > > fix before sending PPS. > > > > /Tim > > > > Ana Hernandez wrote: > > > >>>Hi Rob, > >>> > >>>I read your mail, and I have a problem about you said, I have a node > >>>with a GPS Garmin, the signal of pps that I receive is very short, so I > >>>can not to synchronize the node. > >>> > >>> remote refid st t when poll reach delay offset > >>>jitter > >>>============================================================================== > >>> 127.127.28.0 .SHM. 0 l - 64 0 0.000 0.000 > >>>4000.00 > >>>+193.224.70.7 195.111.99.186 2 u 300 512 377 25.619 1.349 > >>>0.087 > >>>*130.206.169.218 .SHM. 1 u 239 512 377 40.112 1.271 > >>>0.085 > >>> > >>>The pulses are too short for transmission via RS232. I try to lengthen > >>>them, > >>> > >>>/bin/echo -ne "\n\$PGRMC,,$ALTITUDE,,,,,,,,3,,2,48,\n\n" > $GPSDEVICE > >>> > >>>but I can not get to lengthen the pulses, you think that is posible the > >>>problem is in the wire? > >>> > >>>_______________________________________________ > >>>timekeepers mailing list > >>>[email protected] > >>>https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers > >>> > > > > > > > _______________________________________________ > timekeepers mailing list > [email protected] > https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.1 (GNU/Linux) > Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org > > iD8DBQFFrOtU/V2VyZDycRcRAq6hAKDDrauBB5I+c8ahB7YDTM4bE04PHACguYbC > 1RNUwVfv68eghi4HTNhBBgQ= > =iDRR > -----END PGP SIGNATURE----- _______________________________________________ timekeepers mailing list [email protected] https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers
