Keysight Technologies X Series Service Guide

166 Keysight N9010A EXA Service Guide
RF Section Troubleshooting (RF/Microwave Analyzers)
Troubleshooting
If any of the voltages measured do not match the levels shown in Table 4-9,
the most probable cause is the A15 Front End Control Assembly. Once the
switch control logic has been verified, turn off the instrument, disconnect the
RF Front End Troubleshooting board cables, and reconnect the analyzer cables
to the A15 Front End Control Assembly. Turn the instrument on and allow it to
complete its full boot up process to Spectrum Analyzer mode.
S14A Sets path to either band 1 & 2 mixer or band
3 & 4 mixer
CF 5 GHz
CF 20 GHz
−9.83
+9.83
±0.5
S14B Sets path to either band 1 & 2 mixer or band
3 & 4 mixer
CF 5 GHz
CF 20 GHz
+9.67
−9.67
±0.5
VCC1 Voltage always on 4.8 ±0.5
VCC2 Voltage always on 4.8 ±0.5
VCC3 Voltage always on 7.85 ±0.5
VCC4 Voltage always on 5.0 ±0.5
VCC5 Voltage always on 5.0 ±0.5
TWAD1 Amplifier bias to A13 RF Front End
Assembly
6.0 ±0.5
TWAD2 Amplifier bias to A13 RF Front End
Assembly
6.0 ±0.5
TWAD3 Amplifier bias to A13 RF Front End
Assembly
6.0 ±0.5
TWAD4 Amplifier bias to A13 RF Front End
Assembly
6.0 ±0.5
TWAD5 Amplifier bias to A13 RF Front End
Assembly
6.0 ±0.5
Tolerances should be used as a guideline.
Table 4-9 Front End Control Logic
Test Point Description Instrument Settings Voltage
(VDC)
Tolerance
(VDC)

Keysight Technologies X Series Specifications

General

Brand	Keysight Technologies
Model	X Series
Category	Measuring Instruments
Language	English