Anritsu BERTWave Series, Operation Manual, Page: 255 / 466

6.3 Calibration and Adjustment
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How to Operate Sampling Scope
The System Conversion Gain value is automatically set by setting
the Conversion Gain value.
Adjustment method of Responsivity
1. Adjust the wavelength of the optical power meter to the optical
signal.
2. Measure unmodulated optical signal power with the optical power
meter.
3. Input the optical signal to the optical input connector.
4. Measure the Average Power (mW) or Average Power (dBm) of the
optical signal by using the Amplitude/Time function of the sampling
oscilloscope.
5. Click Amplitude.
6. Click the O/E tab.
7. Select User for the connector of the optical signal input at Input
Connector (Wavelength).
8. Adjust the Responsivity value so that the Average Power value of the
optical signal measured by the Amplitude/Time function of the
sampling oscilloscope becomes equal to the value measured by the
optical power meter.
<Adjusting Automatically by Auto Correction>
1. Adjust the wavelength of the optical power meter to that of the
optical signal.
2. Measure unmodulated optical signal power with the optical power
meter.
3. Input the optical signal to the optical input connector.
4. Click
Amplitude.
5. Click the O/E tab.
6. Select User for the connector of the optical signal input at Input
Connector (Wavelength).
7. Set the Input Power to the value of the optical signal power
measured by Step 2.
8. Click Execute to calibrate automatically.
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When Auto Correction is completed, the values of Conversion Gain,
and Responsivity are adjusted so that they become equal to the
values measured by the optical power meter.