Keysight Technologies X Series Service Manual page 248

Front End Control Troubleshooting
A15 Front End Control Assembly Troubleshooting
Low Band Switch Control Logic Verification (Option 507, 513, 526 only)
If your EXA has Option 532 or 544 skip to
Board" on page
Press Mode Preset on the analyzer. Press FREQ, 50 MHz, SPAN, 2 MHz on the
analyzer. Make sure the auto alignments are turned off by pressing System,
Alignments, Auto Align, Off. Connect the voltmeter positive lead to test point
listed in the table below and the negative lead to the instrument chassis. These
test points are located under the J2 connector. Verify the voltages in
6-9.
Press FREQ, 5 GHz on the analyzer. Verify the voltages in
If the voltages are not correct, the most probable cause is the A15 Front End
Control board.
The procedure above will not work on analyzers with frequency range options 532 or 544.
248
"Disconnect RF Front End Troubleshooting
249.
Table 6-9
Test Board
Test Point
In1A
In2A
In1B
In2B
Table 6-10
Test Board
Test Point
In1A
In2A
In1B
In2B
Vol tage
(VDC)
−9.90
−9.90
+10.0
+10.0
Table 6-10.
Vol tage
(VDC)
+10.0
−9.90
−10.0
+10.0
Keysight N9010A EXA Service Guide
Table