488 Keysight NFA Series Noise Figure Analyzers Service Guide
Functional Tests
Before Performing a Functional Test
Before Performing a Functional Test
1. Ensure that you have the proper test equipment.
2. Switch on the unit under test (UUT) and let it warm up (in accordance with
warm-up requirements in the instrument specifications).
3. Allow sufficient warm-up time for the required test equipment (refer to
individual instrument documentation for warm-up specifications).
4. Ensure that the analyzer’s frequency reference is set to Internal:
a. Press the Input/Output, Freq Ref Input keys.
b. If the Freq Ref Input does not show Internal, press the Freq Ref
Input softkey and select Internal.
5. Following instrument warm-up, perform the auto align routine:
Press System, Alignments, Align Now, Align Now All.
Functional test accuracy depends on the precision of the test equipment
used. Ensure that all of the test equipment is calibrated before running a
functional test.
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