9.2 Command Set 71
9.2.3 Status Mode Commands
Return Status of Event/Deviation
Command: SA
SA returns the event/deviation channel setup information, read index number and write index
number.
Response: D(E), R = nnn, S = mmm
C
Format: D indicates the input channel is in 1–PPS deviation mode
E indicates the input channel is in event mode
nnn = Channel read index (001 to 500)
mmm = Channel write index (001 to 500)
NOTE: When nnn = mmm, using the EA command to read event data, the event buffer is empty,
i.e., all event data which has been recorded has also been read.
Return Clock Status
Command: SC
SC returns the current clock status.
Response: L/U, U=xx, S=nn
C
Format:
L = Clock currently locked to GPS (U for unlocked).
xx = Indicates loss of lock period, up to 99 minutes.
nn = User specified out-of-lock delay, 00 to 99 minutes (refer to Table A-8).
S = Off if the out-of-lock function is deactivated, S = ZDL indicates zero delay.
Return DCXO Status
Command: SD
SD returns the DCXO (Digitally Compensated Crystal Oscillator) status.
Response: ±tt.t
◦
C ±pp.pp PPM
C
Format: tt.t = Ambient temperature in degrees C – Not used on these models
pp.pp = Residual, corrected DCXO error, in parts per million