Jackson Labs FireFly-1A GPSDO, Руководство пользователя

Страница: 24 / 44

FireFly-1A User Manual
18 © 2011 Jackson Labs Technologies, Inc.
3.9.10 SERVo:TRACe
This command sets the period in seconds for the debug trace. Debug trace data can be used with
Ulrich Bangert’s “Plotter” utility to show UTC tracking versus time etc.
This command has the following format:
SERVo:TRACe <int > [0,255]
An example output is described here:
08-07-31 373815 60685 -32.08 -2.22E-11 14 10 6 0x54
[date][1PPS Count][Fine DAC][UTC offset ns][Frequency Error Estimate][Sats Visible][Sats
Tracked][Lock State][Health Status]
Please see the SYNChronization? command for detailed information on how to decode the health
status indicator values.
Note: health status information is available with firmware versions 0.913 and later.
The Lock State variable indicates one of the following states:
3.9.11 SERVo?
This command returns the result of the following queries:
SERVo:COARSeDac?
SERVo:DACGain?
SERVo: EFCScale?
SERVo:EFCDamping?
SERVo:SLOPe?
SERVo:TEMPCOmpensation?
Value State
0 OCXO warmup
1 Holdover
2 Locking (OCXO training)
4 [Value not defined]
5 Holdover, but still phase locked (stays in this state for about 100s after GPS lock
is lost)
6 Locked, and GPS active