Keysight Technologies N9040B UXA Signal Analyzer Service Guide 163
RF Section Troubleshooting (RF/Microwave Analyzers)
Troubleshooting
Attenuation Check
Set the signal source connected to the analyzer input port to 0 dBm. On the
analyzer, press Amplitude, Attenuation, and change input attenuation to 0 dB.
The measuring spectrum analyzer connected to A10 Attenuator output port
should indicate a 0 dBm level. Change the input attenuation on the analyzer
under test to 2 dB.
See the chart below for expected measurement values at the A10 Attenuator
output port.
Analyzer Under Test
Attenuator Setting (dB)
Power at A10 Output Port Input Attenuator Being Tested
0 0 dBm (reference) Both set to through path
2 −2A9
4 −4A9
6 −6 A10
8 −8 A9 set to 2 dB,
A10 set to 6 dB
10 −10 A10
20 −20 A10
30 −30 A10
40 −40 A10
50 −50 A10
60 −60 A10
70 −70 A9 set to 4 dB,
A10 set to 66 dB
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