Agilent Technologies Agilent 86120C manual Test 4. Optical Input Return Loss

Performance Tests

Test 4. Optical Input Return Loss

Test 4. Optical Input Return Loss

Description Input return loss is verified using the following devices:

•Agilent 8153A lightwave multimeter

•Agilent 81553SM 1550 nm Fabry- Perot laser, SM 9/125 ∝m source module

•Agilent 81534A return loss module

Procedure Standard instruments (flat contacting connectors)

1Turn the source module’s output off.

2Connect a single- mode patchcord between the source module’s optical output and the return loss module’s INPUT SOURCE connector.

3Set the return loss module’s wavelength to 1550 nm, and select an average time of 1 second.

4Locate an HMS- 10/HRL to FC/PC patchcord. Connect the HMS- 10/HRL end of the patchcord to the return loss module’s OUTPUT connector. Terminate the other end of the cable.

5Zero the return loss module.

6Turn on the source module.

7Remove the termination from the cable, and leave the cable’s free end uncovered.

8The return loss module measures the reflection reference (14.6 dB return loss of the patchcord’s FC/PC connector in air).

9Make a low- reflection termination in the HMS- 10/HRL to FC/PC patchcord. Do this by wrapping the cable 6 times around a 5 mm diameter mandrel.

10The return loss module measures the termination parameter.

11Connect the HMS- 10/HRL to FC/PC patchcord to the Agilent 86120C’s front panel OPTICAL INPUT connector.

12The lightwave multimeter measures the return loss. Compare this measurement with the specification listed in Chapter 6, “Specifications

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