Anritsu ML2430A operation manual Sensor Calibration, Procedures, 4SENSOR Calibration

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
Cal/Zero	Zero	Sensor A
		Sensor B

Figure 5-1.Sensor Zeroing Key Sequence

5-4SENSOR CALIBRATION

NOTE

When a Universal Power Sensor with op- tion 1 fitted is changed from T-RMS mode to F-CW mode the user should perform a new zero/cal

Note that if only one sensor is connected, the A-B selection is not dis- played and the zeroing process begins immediately.

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 5-3) or in conjunction with calibration (Section 5-5).

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 5-3 to zero the sensor.

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
Cal/Zero	0 dBm	Sensor A
		Sensor B

Figure 5-2.Sensor Calibration Key Sequence

Note that if only one sensor is connected, the A-B selection is not dis- played and the zeroing process begins immediately.

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.

5-2 ML2430A OM