Keysight Technologies 86120B, User Manual

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Performance Tests
Test 3. Polarization Dependence
Test 3. Polarization Dependence
Description Polarization Dependence is verified using the following devices:
• 1310 nm and 1550 nm DFB lasers
• Optical attenuator
• Keysight 11896A Polarization Controller
C A U T I O N
Do not 18 dBm source power. The Keysight 86120B’s input
circuitry can be damaged when total input power exceeds 18 dBm.
Procedure Perform the following procedure first using the 1310 nm laser and then repeat the
steps using the 1550 nm laser.
1 Turn on the lasers and allow them to warm up.
2 Set the polarization controller to a scan rate of 5.
3 On the Keysight 86120B, press the Preset key.
4 Connect the laser’s optical output to the polarization controller’s optical input.
5 Connect the polarization controller’s optical output to the Keysight 86120B being
tested.
6 Set the polarization controller to autoscan.
7 On the Keysight 86120B, press Peak WL, Appl’s, and then DRIFT . Press MAX-MIN
so that both MAX and MIN in the softkey label are highlighted. The display shows the
total drift since the drift measurement was started.
8 Wait five minutes, read the peak amplitude drift from the Keysight 86120B, and
compare with the specification listed in
Chapter 7, “Specifications and Regulatory
Information” .