Section 3
Closed-Case Calibration
INTRODUCTION 3-1.
The closed-case calibration procedures allow the RF level, AM depth, FM deviation,
and the internal 10-MHz reference oscillator to be calibrated without removing the
instrument covers.
The calibration procedures can be performed at the specified 2-year calibration
intervals or whenever one wishes to optimize the performance of the 6080A/AN
Synthesized Signal Generator.
The procedures can be performed from the front panel or remotely under the control of
an IEEE-488 bus controller. Each procedure consists of the following steps:
1. Set the rear panel CAL|COMP switch to the 1 (on) position.
2. Initiate the calibration procedure.
3. Connect the required measurement equipment to the signal generator's RF output.
4. Adjust the parameter of interest until the meter reading matches a predetermined
target value.
5. Store the updated calibration factor.
Although these procedures are useful for periodic calibration, they cannot correct
hardware failures. If the required adjustment exceeds the procedure's adjustment
limits, the signal generator needs repair and "CIRCUIT DESCRIPTIONS, TROUBLE-
SHOOTING, AND ALIGNMENT" in Section 6 should be consulted.
3-1
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