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