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3.2.1 Zeroing and calibration of the S71710 series CW sensor
The zeroing operation of the 71710 series power sensor refers to measurement and storage of the noise of the entire
measurement channel. In the measurement process, the zeroed value should be subtracted from the actual measured value,
that is, the channel noise should be subtracted, and the reading obtained at this time is the true channel input signal
level.
With regard to the zeroing operation of the 71710 series sensor, if the sensor is connected to the port of the device under
test, it is necessary to disable the power output of the device under test.
The zeroing operation should be performed as per the following steps:
1) Disable the signal output of the device under test;
2) Press [Cal]>[Channel A] >[Zero];
3) Wait for 30 s and complete zeroing.
During calibration of the 71710 series power sensor, it is necessary to connect the sensor to the calibrator port of the
device under test as per the following steps:
1) Connect the 71710 series power sensor to the calibrator output port;
2) Press [Cal]>[Channel A] >[Cal];
3) Wait for 30 s to complete calibration.
Alternatively, press [Cal]>[Channel A] >[Zero+Cal] and complete zeroing and calibration simultaneously.
3.2.2 Zeroing and calibration of the S81702 or S81703 series peak power sensor
With a built-in calibration circuit, the S81702 or S81703 series peak power senor can be calibrated without being
connected to the calibrator output port of the S2438 microwave power meter.
The zeroing and calibration steps of the S81702 or S81703 series peak power sensor are the same as those of the S71710
series power sensor. Please refer to the zeroing and calibration process of the S71710 series power sensors.
3.3 CW Power Measurement
The S2438 series microwave power meter is connected to a S71710 series CW power sensor to measure the average
power of the CW signal power within the dynamic range of -70 dBm to +50 dBm.
The CW power is measured as per the following three steps:
1) Perform zeroing and calibration;
2) Set the frequency of the signal to be measured;
3) Measure the CW power using a CW sensor.
Take Channel A as an example, the specific operation process is as follows:
1) Connect one end of the multi-core cable to the Channel A port of the front panel and the other end to the S71710
sensor, and then power on the instrument;
