Operation
Publication 21555, Rev. E, September 2002
2-17
2.5.12
Sensor Calibration & Zeroing
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CALibrate<sensor 1 or 2>
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CALibrate<sensor 1 or 2>STATe?
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CALibrate<sensor 1 or 2>ZERO
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SENSe<sensor 1 or 2>:TEMPerature?
2.5.12.1
Sensor Calibration
The CALibration commands for sensor calibration and zeroing are important for accurate power
measurement results. Be sure to perform the sensor calibration prior to beginning measurement
operation or channel configuration. Sensors must be calibrated to the meter before performing
measurements.
Zeroing of all active sensors should always be performed whenever a second sensor (whether calibrated
or not) is added or removed. Zeroing should also be performed prior to measurement of low signal levels,
generally within the lower 15 dB of a sensor’s dynamic range. For standard sensors, this is -55 dBm.
CAL#
Syntax:
CALibration<sensor 1 or 2>[:SENSor]
Example:
OUTPUT @PWR_MTR;CAL1
! CALIBRATE SENSOR 1
Description:
This command begins the sensor power sweep calibration process. Power sweep calibration
can be performed only during Normal mode. The sensor must be attached to the front panel
CALIBRATOR (use an adapter for high frequency sensors with Type K connectors). If the
sensor is not connected or if the sensor is disconnected during the power sweep calibration
procedure, the calibration automatically fails and the sensor power sweep calibration table is
restored to its previous values.
CALibrate:STATE?
Syntax:
CALibrate<sensor 1 or 2>:STATe?
Example:
OUTPUT @PWR_MTR;CAL1:STAT?
! QUERIES SENSOR FOR CALIBRATION STATUS
Response:
1 if sensor is calibrated, or 0 if sensor is not calibrated.
Description:
This command queries whether or not a sensor has been calibrated.
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