Hi, My name is Andrei Bogdan Rus and I am from Romania. I have a problem and I don't know how to solve it. Mabey you can help me. I am using a Trimble Palisade NTP Synchronization Sit. The computer used, runs Linux Fedora Core 6. When I configured the sistem to work with the gps receiver, everything worked fine. Now I am trying to make another computer running the same Linux distribution to sincronize with the NTP server and also to sincronize with the PPS pulse from the sinchronization kit. I took the kernel that Rodolfo Giometti offered at the address http://wiki.enneenne.com/index.php/LinuxPPS_support to support the PPS API. I also installed the tools ppstest and ppsctl I found at http://ftp.enneenne.com/pub/misc/linuxpps/test/, My output when I run this tool is: found PPS source #0 "serial0" on "/dev/ttyS0" ok, found 1 source(s), now start fetching data... source 0 - assert 1185518306.699172958, sequence: 10 - clear 1185516328.674035118, sequence: 9 source 0 - assert 1185518306.699172958, sequence: 10 - clear 1185518306.980946546, sequence: 10 source 0 - assert 1185518307.980928373, sequence: 11 - clear 1185518307.980907068, sequence: 11 source 0 - assert 1185518308.980868238, sequence: 12 - clear 1185518307.980907068, sequence: 11 source 0 - assert 1185518309.980829111, sequence: 13 - clear 1185518307.980907068, sequence: 11 source 0 - assert 1185518310.980810941, sequence: 14 - clear 1185518310.980789361, sequence: 12 As I read, this should be the output if I receive the PPS signal corectly to the interface. So the PPS signal reaches to the serial interface and it is received corectly. I use NTP-4.2.2p4 with the refclock_atom patch downloaded from http://ftp.enneenne.com/pub/misc/linuxpps/refclocks/atom/ The problem is that my NTPD is not sinchonising with the pps signal. The configuration file is: # /etc/ntp.conf, configuration for ntpd driftfile /var/lib/ntp/ntp.drift statsdir /var/log/ntpstats/ logfile /var/log/ntpd peer 193.226.6.168 prefer #this is the server sinchronized with GPS Palisade kit ##########PPS############## peer 127.127.22.0 prefer # the pps signal is connected to the pin 1 (DCD) from my serial interface. I have only one serial interface fudge 127.127.22.0 flag3 1 ########################## As I read in the Driver22 tutorial from http://www.eecis.udel.edu/~mills/ntp/html/drivers/driver22.html i did in /dev, the link pps0 The output from the command "ntpq -pn" is: remote refid st t when poll reach delay offset jitter ============================================================================== *193.226.6.168 .GPS. 1 u 41 64 377 0.234 24.256 9.756 127.127.22.0 .PPS. 0 l - 64 0 0.000 0.000 0.001 and from the command "ntpq -c as" is: ind assID status conf reach auth condition last_event cnt =========================================================== 1 10546 9634 yes yes none sys.peer reachable 3 2 10547 8035 yes yes none reject clock expt 3 So, as you see, the sistem is not sinchonising with the PPS signal. I don't know what is the reason. I think that NTPD receives the signal, because in the log is written that refclock: found PPS source.... These are the /var/log/ntpd contents: 27 Jul 16:25:13 ntpd[15941]: refclock: found PPS source #0 "/dev/ttyS0" on "serial0" 27 Jul 16:25:13 ntpd[15941]: refclock_atom: time_pps_kcbind failed: Operation not supported 27 Jul 16:29:31 ntpd[15941]: synchronized to 193.226.6.168, stratum 1 27 Jul 16:29:34 ntpd[15941]: time reset +2.385646 s 27 Jul 16:29:34 ntpd[15941]: kernel time sync enabled 0001 27 Jul 16:32:55 ntpd[15941]: synchronized to 193.226.6.168, stratum 1 I found that other people had the log almost the same, but after sinchronising with the peer, there is another log message "synchonized to PPS(0), stratum 0", but I never get this message and is never synchronising. I want to mention that the GPS receiver, receives signal from the satellites. Thank you for your time, Have a god day
____________________________ | | | ing. Andrei Bogdan RUS | | | | Tel. +40-744-267970 | |____________________________| --------------------------------- Choose the right car based on your needs. Check out Yahoo! Autos new Car Finder tool. _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions