Agilent Technologies Agilent 86120C manual completely filled in

Performance Tests

Test 5. Amplitude Accuracy and Linearity

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10Disconnect the fiber- optic cable from the optical power meter and connect it to the Agilent 86120C’s OPTICAL INPUT connector.

11Set the optical attenuator for the value that you recorded in Step 8.

12Place the polarization controller in the auto scan mode.

13Press the Agilent 86120C’s front- panel Preset key.

14Press List by Power, Appl’s, and then DRIFT.

15After two minutes, stop the polarization controller’s auto scan function.

16Press the MAX-MINsoftkey so that MAX is highlighted. Enter the maximum drift reading on the following line:

maximum drift: ____________

17Press the MAX-MINsoftkey so that MIN is highlighted. Enter the minimum drift reading on the following line:

minimum drift: ____________

18Use the values recorded in Step 8, Step 16, and Step 17 to calculate the power- correction offset value as shown in the following equation:

minimum drift + maximum drift offset = --------------------------------------------------------------------------- – Pwr

2

Enter the calculate value on the following line:

power- correction offset: ____________

19Change the attenuator to the settings shown in Table 5- 21. For each setting, record the power measured on the Agilent 86120C.

After completing this step, the table’s column titled “Agilent 86120C Power Reading” should be completely filled in.

20Calculate the “Linearity” value for each row in the table using the following equation:

Linearity = Power Meter Reading – 86120C Power Reading – offset

21Compare the linearity values with the specification listed in Chapter 6, “Specifications and Regulatory Information”. The data may show multiple amplitude plateaus separated by small amplitude steps. This is not a problem as long as the amplitude steps are within the linearity specification.

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