Keysight Technologies X Series Service Manual page 191

RF Section Troubleshooting (RF/Microwave Analyzers)
Troubleshooting
Table 4-17 Front End Control Logic
Test Point Description
S14A Sets path to either band 1 & 2 mixer or band
3 & 4 mixer
S14B Sets path to either band 1 & 2 mixer or band
3 & 4 mixer
VCC1 Voltage always on
VCC2 Voltage always on
VCC3 Voltage always on
VCC4 Voltage always on
VCC5 Voltage always on
TWAD1 Amplifier bias to A13 RF Front End
Assembly
TWAD2 Amplifier bias to A13 RF Front End
Assembly
TWAD3 Amplifier bias to A13 RF Front End
Assembly
TWAD4 Amplifier bias to A13 RF Front End
Assembly
TWAD5 Amplifier bias to A13 RF Front End
Assembly
Keysight N9010A EXA Service Guide
Instrument Settings
CF 5 GHz
CF 20 GHz
CF 5 GHz
CF 20 GHz
Vol tage Tolerance
(VDC) (VDC)
−9.83 ±0.5
+9.83
+9.67
±0.5
−9.67
4.8
±0.5
4.8 ±0.5
7.85
±0.5
5.0 ±0.5
5.0
±0.5
6.0 ±0.5
6.0 ±0.5
6.0
±0.5
6.0
±0.5
6.0
±0.5
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