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Return loss test – Atec Agilent-81618A User Manual

Page 55

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Performance Tests

Performance Tests

Agilent 81618A/9A and Agilent 81622B/3B/4B/6B/7B/8B User’s Guide, Second Edition

55

Return Loss Test

This performance test applies to Agilent 81622B/3B/4B/6B/7B Optical

Heads.

1 Make sure that all connectors are clean.

2 Connect the equipment as shown in Figure 13.

3 Press [Preset] on the mainframe.

Figure 13

Return Loss Reference Setup

N O T E

To ensure traceability, use the 81610CC Reference Cable for

calibration measurements. Do not use the 81610CC Reference Cable

for measurements on a Device Under Test. Instead, use a measurement

patchcord.

C A U T I O N

It is important to maintain the quality of the straight connector end of

the 81610CC Reference Cable. Never add another connector to the

straight end of the 81610CC Reference Cable, since a physical

connection is made. When the straight end of the 81610CC Reference

Cable is connected to the 81634B Power Sensor module, no physical

connection is made so there should be no degradation of connector

quality.

4 Zero the Return Loss Module and the Optical Head

5 Enable the internal laser source of the Return Loss Module and

allow 20 minutes for it to stabilize.

6 At the Power Meter:

a

Set the averaging time [AvTime] to 1s