96000 Series
Service Manual
3-50
Front
Rear
75 Ω Leveling
Head
75 Ω to 50 Ω Impedance
Matching Pad
6 dB Attenuator
RF Input
Ext Ref Input
Spectrum Analyzer
Ref Frequency
Output
Instrument
hpn225.eps
Figure 3-13. Equipment Connections - Attenuation Accuracy Test 75 Ω Leveling Head (96040A and
96270A)
Note
The 6 dB attenuator minimizes mismatch errors. Additional
attenuation may be required to satisfy alternative Measuring
Receiver maximum input limitations.
Note
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:
Note
For the 96270A, ensure the Leveling Head output is selected.
Signal Leveling Head Output
Frequency 50 MHz
Level +10 dBm
Output OPER
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