SENSOR CALIBRATION | PROCEDURES |
To zero the sensor without calibration, press the Cal/Zero front panel key and the Zero soft key, then select the appropriate sensor.
ML2430A |
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Cal/Zero |
| Zero |
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Figure 5-1. Sensor Zeroing Key Sequence
5-4 SENSOR CALIBRATION
NOTE
When a Universal Power Sensor with op- tion 1 fitted is changed from
Note that if only one sensor is connected, the
The message changes to SENSOR x ZERO . . . . On successful comple- tion of the zeroing operation, the buzzer sounds. Sensor calibration should be performed next.
If the sensor fails the zeroing operation, the message SENSOR x ZERO fail nxnnn is displayed. The hexadecimal error code 'nxnnn' indicates the detailed reason for the failure, which is usually due to excessive RF noise.
The sensors can also be zeroed using the GPIB ZERO command (see Chapter 6, “GPIB Operation”).
Referencing power sensors to the ML2430A Series 50 MHz, 0.0 dBm cali- brator is recommended. Sensors should be zeroed before being cali- brated, either as a separate operation (Section
To reference the sensor, connect the sensor to the ML2430A Series 50 MHz, 0.0 dBm reference output connector labeled CALIBRATOR or an- other 50 MHz, 0.0 dBm reference.
When the sensor is first attached, the message SENSOR x NOT ZE- ROED (where x = A or B as appropriate) is displayed. Perform the sensor zeroing procedure described in Section
To calibrate the sensor after zeroing, press the Cal/Zero front panel key and the Cal 0 dBm soft key, then select the appropriate sensor.
ML2430A |
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Cal/Zero |
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| Sensor A |
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Figure 5-2. Sensor Calibration Key Sequence
Note that if only one sensor is connected, the
On successful completion of the calibration operation, the buzzer sounds.
If the sensor fails the calibration operation, the message SENSOR x CAL 0 dBm invalid is displayed.
ML2430A OM | |
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