Fluke 6080A - Remote Programming Commands for Reference Oscillator Calibration Procedure

CLOSED-CASE CALIBRATION
The calibration procedure is initiated by the command CAL_REFOSC. The
controller requests the signal generator's center frequency with the command
CC_FREQ? and waits for a response. When a response is received, the controller gets a
counter reading and sends it to the signal generator with the command CC_RDFREQ.
The program remains in the main loop until the signal generator returns the end code
"9E+09, Hz" in response to the CC_FREQ? command. The main loop is then exited
and the data is saved with the CC_SAVE command.
Each time the signal generator receives a reading from the controller, it adjusts its
internal settings and programs the new reference oscillator DAC setting. When the
signal generator receives two consecutive readings within 10 Hz of the target value (100
MHz) it considers the displayed adjustment value correct and returns the end code.
The controller program must ensure that each counter reading is settled before sending
it to the signal generator. The program listing in Appendix G uses a simple but effective
method to obtain valid counter readings.
The programming commands used in a remote level calibration procedure are listed in
the Table 3-8. See Table 5B-3 in Section 5B of the Operator Manual for a complete
syntax description of each command.
Table 3-8. Remote Programming Commands for Reference Oscillator Calibration Procedure
COMMANDS
CAL_REFOSC
CC_RDFREQ
CC_FREQ?
CC_TARGET?
RFOUT
CC_SAVE
CC_EXIT
ERROR?
STATUS/STATUS?
DESCRIPTION
Initiate the remote reference oscillator calibration procedure
Send the counter meter to the 6080A/AN
Request the RF frequency
Request the target value
Program the RF output on/off
Save the measured data
Abort the cal procedure immediately
Request the rejected entry status
Load/Request the overrange/uncal status
3-17/3-18