User`s guide

Te s t F ai lu r e Performance Tests
Agilent 81618A/9A and Agilent 81623B/4B/6B/8B Optical Heads, Fourth Edition
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Test Failure
If the Agilent 81618A/19A Interface module or Agilent 81623B/4B/6B/8B
Optical Head fails any performance test, return the instrument to the
nearest Agilent Technologies Sales / Service Office for repair.