Fluke 96000 Series Service Manual page 68

96000 Series
Service Manual
Low-Level Test Points (steps 28-36)
28. Connect the Leveling Head to the RF INPUT of the Measuring Receiver and
Ref Frequency
Figure 3-7. Equipment Connections - 50 Ω Leveling Head, Low Level Accuracy Test Points
Low-level measurements are made with a Measuring Receiver,
relative to levels previously measured with the Power Sensor and
the Measuring Receiver. Two levels (-37 dBm from the Power
Sensor and -75 dBm from the Measuring Receiver) are used as
reference points to provide the required UUT hardware configuration
for the subsequent tests. The value of the output level at -37 dBm
measured in steps 19 through 27 above and at -75 dBm measured
in steps 30 through 33 below will be used as references in the
following procedure, identified as P
test frequency. It is important that the correct sequence is followed
as described.
3-26
connect the REF FREQUENCY OUTPUT (rear panel) from the UUT to the
Spectrum Analyzer Ext Ref In (on rear). See Figure 3-7 for equipment
connections.
Instrument
Output
Spectrum Analyzer
Front
Rear
Ext Ref Input
Note
and P respectively for each
-37 -75
RF Input
50
Leveling Head
hpn207.eps