TRAK MODEL 9100 MODULAR FREQUENCY/TIME SYSTEM
3-13
TM4400013
Rev
D
3-5.4 Request
Commands
Request DAC reference value
Indicates the voltage level which when applied to the internal oscillator control input will place the oscillator at its'
10 MHz center frequency. This value is used to indicate when the oscillator needs calibration. If the DAC value
is < 6,554 or >58,982 the OSC CAL minor alarm is activated.
Host
sends:
X.RQDR<CR>
9100
replies:
X.RQDR
ddddd<CR><LF>
Where:
ddddd is DAC setting (range is 0 to 65535)
X is described on command summary page
NOTE: The ddddd field is not padded with zeros or spaces and will contain only the digits necessary to
represent the value.
Request difference between the internal 1 PPS reference and the selected time reference
Host
sends:
X.RQIR<CR>
9100 replies:
X.RQIR ttt REF – mmm, "string"<CR><LF>
Where:
ttt
(time
ref)
is
"INT" if internal reference
mmm (measurement ref) is "UTC" or "GPS"
"string"
is
either
the
difference (in nanoseconds) or a status message
X is described on command summary page
Request internal 1 PPS reference locked status
Provides time stamp of when internal oscillator locked or unlocked.
Host
sends:
X.RQLK<CR>
9100
replies:
X.RQLK
NO
LOCK SINCE POWERUP<CR><LF>
or
X.RQLK FREE RUN SINCE ddd:hh:mm:ss<CR><LF>
or
X.RQLK
LOCKED
SINCE ddd:hh:mm:ss<CR><LF>
Where:
X is described on command summary page
