Fluke 96000 Series Service Manual page 133

18. Set the UUT to OPER.
19. Set the Spectrum Analyzer reference level, span, resolution and/or video
bandwidth as necessary to make a high-quality level measurement at the
applied level and frequency.
For each frequency it is important to maintain consistent
analyzer/receiver settings as the target amplitude changes. For any
given frequency the Analyzer setting can be to suit, but that setting
must be maintained for all amplitudes at that frequency after the
transfer point. In particular, analyzer attenuator, reference level and
resolution bandwidth settings must not change. Typically there are 3
or 4 amplitudes per frequency point during which the Analyzer
settings must be static.
20. Using the blue arrow keys and rotary knob, edit the UUT Actual output until
the Spectrum Analyzer display indicates the Target value stated. Push
Accept Target.
The recommended Spectrum Analyzer/Measuring Receiver is
capable of automatically compensating for the insertion loss of the
Ω Ω
75 to 50 impedance-matching pad. If this feature is not enabled
or an alternative Spectrum Analyzer is used the insertion loss must
be taken into account to obtain the expected level indication on the
Spectrum Analyzer.
21. Push Next Target.
22. Repeat steps 19 through 21 for all points requiring the use of the Spectrum
Analyzer until all Leveling Head adjustments are completed.
23. Push Back. The 75 Ω Leveling Head adjustment is now complete.
24. To adjust additional Leveling Heads, substitute the remaining Leveling
Head(s) for the one currently attached and perform the appropriate (50 Ω or
75 Ω) Leveling Head adjustment process. If not, push Exit>Back>Exit to
return the UUT to a normal operating state.
Note.
Note
Calibration Adjustment
Calibration Adjustments
4
4-13