Arbiter Systems 1092A - Option 28 Commands

120 Options List
with frequency below nominal (50 or 60 Hz) and decreases with frequency above nominal; in
other words, if the zero crossing occurs just after 1 PPS-GPS, the phase angle will be just
above zero, and if the zero crossing occurs just prior to 1 PPS-GPS, phase angle will be just
under 360
◦
.
• Time deviation decreases (becomes more negative) with frequency below nominal, and in-
creases (becomes more positive) with frequency above nominal.
C.12.9 Option 28 Commands
Return System Frequency
Command: FS
FS returns Option 28 system frequency.
Response: SS ff.fff C
Where: SS = UTC seconds
ff.fff = frequency, Hz
Return System Frequency Deviation
Command: FD
FD returns the system frequency deviation.
Response: SS±f.fff C
Where: SS = UTC seconds
f.fff = frequency, Hz
Return System Phase
Command: PS
PS returns the system phase.
Response: SS±ppp.pp C
Where: SS = UTC seconds
ppp.pp = phase, 0 to 360 degrees
Return System Time Deviation
Command: TD
TD returns the system time deviation.
Response: SS±tt.tttt C
Where: SS = UTC seconds
tt.tttt = time deviation, seconds