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
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