Hi, I'm trying to make sense of the output from the status screen of this GPSDO
E-113> :SYSTEM:STATUS? ------------------------------- Receiver Status ------------------------------- SYNCHRONIZATION ............................................. [ Outputs Valid ] SmartClock Mode ___________________________ Reference Outputs _______________ >> Locked to GPS TFOM 3 FFOM 0 Recovery 1PPS TI +48.6 ns relative to GPS Holdover HOLD THR 1.000 us Power-up Holdover Uncertainty ____________ Predict 8.5 us/initial 24 hrs ACQUISITION ................................................ [ GPS 1PPS Valid ] Tracking: 6 ____ Not Tracking: 1 ________ Time ____________________________ PRN El Az SS PRN El Az UTC 19:12:37 14 Dec 2014 5 43 191 71 21 13 307 GPS 1PPS Synchronized to UTC 13 67 96 59 ANT DLY 0 ns 15 36 290 52 Position ________________________ 26 81 307 50 MODE Hold 28 50 108 53 30 39 62 45 LAT N 51:39:04.122 LON E 0:46:36.379 ELEV MASK 10 deg HGT +44.16 m (MSL) HEALTH MONITOR ......................................................... [ OK ] Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv: OK E-113> What does the "SS" mean? According to the 58503A / 59551A *Symmetricom* manual http://www.leapsecond.com/museum/hp59551a/097-59551-02-iss-1.pdf there should be a "C/N" there, not a "SS". The manual says 50 is the maximum value for C/N, and 35 is the minimum for stable tracking. The fact I have four satellites showing an SS of over 50 indicates that I can't just assume SS=C/N. The manual for the 58503B, http://www.leapsecond.com/museum/hp58503a/097-58503-13-iss-1.pdf which I assume is a later model than the 58503A, says again C/N is used on the 58503B, but it does say "SS" is used on the 59551A, which is a quite a different beast - it does not have a 10 MHz output. For that it says SS ranges from 0 to 255, and that 20-30 is weak. *IF* I can assume the SS in the 58503A works the same was as SS in the 59551A, then it looks like I have 6 satellites which are not weak. But that is a big "IF" Does anyone have an HP manual for the 58503A? Dr. David Kirkby Ph.D CEng MIET Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT, UK. Registered in England and Wales, company number 08914892. http://www.kirkbymicrowave.co.uk/ Tel: 07910 441670 / +44 7910 441670 (0900 to 2100 GMT only please) _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.