5-22
Servicing
Performance Tests
Test 2. Power Stability
Description Power stability is verified using a power meter (> 30 dB return loss)
This test must be performed in a stable environment where the ambient tem-
perature changes less than 1°C throughout the test.
Procedure
1Turn on the Agilent83438A and the power meter. Allow them to warm up for
one hour.
2Connect a power meter to the Agilent 83438A’s front-panel OPTICAL OUT
connector.
3Remove any BNC termination on the rear-panel MODULATION INPUT connector.
4Configure the power meter to measure total drift in output power over 15
minutes. Start the test.
5After 15 minutes have passed, the total output power should not have drifted
more than ±0.02 dB. Record the maximum drift on the following line:
Maximum drift (15 minutes): ____________ dB
6Configure the power meter to measure total drift in output power over 6 hours.
7After 6 hours have passed, the total output power should not have drifted more
than ±0.05 dB. Record the maximum drift on the following line:
Maximum drift (6 hours): ____________ dB