CLOSED-CASE CALIBRATION
Table 3-2. Remote Programming Commands for AM Calibration Procedure
COMMANDS
CAL_AM
CC_RDAM
CC_FREQ?
CC_TARGET?
RFOUT
CC_SAVE
CC_EXIT
ERROR?
STATUS/STATUS?
DESCRIPTION
Initiate the remote AM calibration procedure
Send the mod meter reading 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
FM CALIBRATION 3-8.
The FM calibration procedures allow a single point calibration of the FM deviation to
be performed. An RF modulation meter is connected to the 6080A/AN's RF output,
and the FM calibration factor is adjusted based on the meter reading. The procedure
specific parameters are as follows:
Adjustment Range: ± 10 kHz
Adjustment Resolution: 0.1 kHz
Target Value: 100 kHz
Frequency: 640.000000 MHz
RF Level: +10.0 dBm
Internal AM: ON
Modulation Frequency: 1 kHz
External Equipment: RF Modulation Analyzer (HP 8901A or equivalent)
When performing the front panel procedure, use the edit knob to adjust the FM
deviation until the measured FM deviation matches the target value. When the remote
procedure is performed, the process is under the control of a program running on an
IEEE-488 bus controller.
The front panel display is reconfigured during the procedures. The target level is
displayed in the modulation field, the RF frequency is displayed in the frequency field,
the adjustment value is displayed in the amplitude field, and the CAL annunciator is
lit. The display is consistent for the front panel and remote procedures.
All adjustments update a temporary copy of the FM calibration factor. The copy in the
calibration memory is updated only after the store command is given explicitly. After
the store command has been given, the internal calibration factor is calculated from the
displayed adjustment value and is stored in the calibration memory. Subsequent FM
programming commands use the new calibration factor.
NOTE
Set the rear panel CAL COMP switch to the 1 (on) position before
initiating an FM calibration procedure.
3-7
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