Keysight Technologies 81618A User Manual

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Keysight Technologies 81618A User Manual Manual pdf 49 page image

Keysight 81618A/9A and Keysight 81620B/3B/4B/6B/8B Optical Heads User’s Guide 49Performance Tests 4The thermal characteristics of the sphere do not change from device todevice, or during the product lifetime. If a head without the sphere passesthe linearity test within the specifications given on the Test Record Sheet,then the whole system - sphere and head - is within the productspecification.The head and the integrating sphere of the 81628B are adjusted andserialized together, therefore the specifications of the 81628B are onlyvalid for that given combination of head and integrating sphere.The disconnecting and connecting of the integrating sphere may changethe performance verification data slightly.Accuracy TestThis performance test applies to Keysight 81623B/4B/6B/8B OpticalHeads.NOTE The linearity test must only be performed at either 1310 nm or 1550 nm.The accuracy test must be performed in the - 20 dBm range at 10.0 μWat both 1310 nm and 1550 nm.