Agilent Technologies Agilent 86120C manual Test 5. Amplitude Accuracy and Linearity

Performance Tests

Test 5. Amplitude Accuracy and Linearity

Test 5. Amplitude Accuracy and Linearity

Equipment Amplitude linearity is performed using the following devices:

•1550 nm DFB lasers

•Optical attenuator

•Agilent 11896A polarization controller

•Optical power meter

Procedure

Polarization sensitivity

To ensure measurement accuracy, minimize the movement of any fiber-optic cables during this procedure. Moving cables causes polarization changes which affect amplitude measurements.

1Turn on the laser and allow it to warm up.

2Connect the laser’s output to the optical attenuator’s input.

3Connect the optical attenuator’s output to the polarization controller’s optical input.

4Connect the polarization controller’s optical output to the optical power meter.

5Configure the optical power meter for 1550 nm.

6Adjust the optical attenuator so that the power meter measures a power level of 0 dBm.

7Enter the attenuator setting and the measured power level in the first row of Table 5- 21 on page 5- 11. Be sure to enter these values into the “Attenuator Settings” and “Power Meter Readings” columns.

8Enter the measured power on the following line: Pwr: ____________

9Change the attenuator in 1 dB steps as shown in Table 5- 21, and enter the attenuator settings and power measurements.

After completing this step, the first two columns of the table should be

5-9