Any error conditions encountered during calibration, for example the pres
-
ence of extraneous noise or RF signals, will result in an error message on
the front panel display.
The sensors can also be calibrated using the GPIB CAL command (see
Chapter 6, GPIB Operation).
5-5
SENSOR ZERO/CAL
Sensors must be zeroed before being calibrated. The Zero/Cal function
completes both operations in sequence.
To zero and calibrate the sensor, connect the sensor to the ML2430A Se
-
ries 50 MHz, 0.0 dBm reference output connector labeled CALIBRATOR.
When the sensor is first attached, the message SENSOR x NOT ZERO
-
ED (where
x
= A or B as appropriate) is displayed.
Press the Cal/Zero front panel key and the Zero/Cal function key, then se
-
lect the appropriate sensor. The message changes to SENSOR x ZERO .
..Note that the power meter automatically switches the reference calibra
-
tor OFF during the zeroing operation.
If only one sensor is connected, the A-B selection is not displayed and the
zeroing process begins immediately.
On successful completion of the zeroing operation, the calibration process
begins.
On successful completion of the calibration operation, the buzzer sounds and the
message is cleared.
If the sensor fails either operation, the message SENSOR x ZERO fail nxnnn or
Sensor x Cal fail nxnnn is displayed. The hexadecimal error code '
nxnnn
' indi
-
cates the reason for the failure.
The sensors can also be zeroed and calibrated using GPIB commands (see
Chapter 6,” GPIB Operation”).
5-6
PERFORMANCE
VERIFICATION
The performance of the Power Meter’s individual signal channel inputs can be
verified using an Anritsu ML2419A Range Calibrator. Refer to the
ML2419A
Range Calibrator Operation and Maintenance Manual
(10585-00007) for specific
instructions.
ML2430A OM 5-3
PROCEDURES SENSOR ZERO/CAL
ML2430A
Cal/Zero Zero/Cal Sensor A
Sensor B
Figure 5-3. Sensor Zero/Cal Key Sequence
