Fluke 96000 Series Service Manual page 92

96000 Series
Service Manual
Ref Frequency
Figure 3-13. Equipment Connections - Attenuation Accuracy Test 75 Ω Leveling Head (96040A and
The 6 dB attenuator minimizes mismatch errors. Additional
attenuation may be required to satisfy alternative Measuring
Receiver maximum input limitations.
Unwanted interference from signals at 10 MHz due to the frequency
reference outputs of equipment operating in the vicinity of the test
setup or the equipment used during the tests can cause erroneous
results. To avoid such problems, add a small offset (50 kHz) to the
listed nominal test frequency.
2. On the UUT enable the REF FREQUENCY OUTPUT, set the UUT as follows:
For the 96270A, ensure the Leveling Head output is selected.
3-50
Instrument
Output
Signal
Frequency
Level
Output
Front
75 Ω to 50 Ω Impedance
Matching Pad
75 Ω Leveling Head
Rear
96270A)
Note
Note
Note
Leveling Head Output
50 MHz
+10 dBm
OPER
Spectrum Analyzer
RF Input
6 dB Attenuator
Ext Ref Input
hpn225.eps