You can find M12+ sawtooth information and plots at: http://www.leapsecond.com/pages/m12/sawtooth.htm
Also, here is a nice graph comparing the 1 PPS error of 4 GPS receivers: http://www.leapsecond.com/pages/gps4/cns-1pps.gif Dark blue is a Motorola Oncore VP with approximately +/- 50 ns of jitter; 30 ns rms. Pink is a Motorola M12+, 10 ns rms. Yellow is a Motorola M12+ with hardware (or software) sawtooth correction; 6 ns rms. Green is an HP SmartClock (58503B) with 1.3 ns rms. Note however that although the short-term jitter is less there appears to be more wander of the phase mid-term (typical of a GPSDO). So in the end, for long-term 1 PPS timing use, I found the M12+ with sawtooth correction more stable than the other GPS receivers, including a GPSDO. /tvb http://www.LeapSecond.com _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
