Fluke 96000 Series - Page 132

96000 Series
Service Manual
4-12
75 Ω Power Sensor using a Type-N female-to-female adapter. See Figure 3-
11 for equipment connections.
Note
The insertion loss of the 75
Ω Type-N female-to-female adapter
must be taken into account at each adjustment frequency.
11. Set the Power Meter for 0.001 dB resolution.
Note
The next steps make the high and mid-level flatness adjustment of
the 75
Ω Leveling Head using a Power Meter and sensor.
12. Set the UUT to OPER.
13. Enter the measurement frequency corresponding to each Target into the
Power Meter to enable cal factor (frequency) correction.
Note
The recommended Power Meter has Power Sensor calibration
factors stored internally in the sensor. Setting the input frequency in
the Power Meter automatically selects the appropriate cal factor for
the measurement. However, the Power Sensor may also be
accompanied by a table of calibration factors which must be applied
externally.
Note
The Power Meter autorange boundary may coincide with a
measurement point. To avoid unwanted Power Meter autoranging
during the adjustment process, manually lock the Power Meter range
when the UUT indicates the current adjustment point is a Transfer
Point and maintain the Power Meter range lock for all frequencies at
that amplitude. When the sequence reaches the next Transfer Point
allow the Power Meter to autorange and then manually lock the
Power Meter range again, continuing in this fashion for all points
requiring use of the Power Meter.
14. Using the blue arrow keys and rotary knob, edit the UUT Actual output until
the Power Meter indicates the Target value stated. Push Accept Target.
15. Push Next Target.
16. Repeat steps 13 through 15 for all points requiring the use of the Power
Meter and sensor (the UUT text box will indicate Use Power Meter). Set the
UUT to STBY.
Note
If using a Power Sensor with different characteristics than the one
specified, it may be necessary to change sensors prior to this point.
Consult the Power Sensor manufacturer’s manual for input signal
level specifications.
17. Disconnect the Power Meter and sensor from the UUT 75 Ω Leveling Head.
Connect the 75 Ω Leveling Head to the input of the Spectrum Analyzer via a
75 Ω to 50 Ω impedance-matching pad at the Spectrum Analyzer RF input.
Note
The next steps make the low-level flatness adjustment of the 75
Ω
Leveling Head using a Spectrum Analyzer/Measuring Receiver.