Keysight Technologies X Series Service Manual page 163

RF Section Troubleshooting (RF/Microwave Analyzers)
Troubleshooting
7. YTF Preselector Control Logic Verification
(All except Option 503)
In order to properly measure the preselector tune output from the A15 Front End Control
Assembly, the following items are required:
— E9637A Banana plug to BNC (f) adapter
— E9632A BNC (M) to SMA (f)
— 8120-1460 Small coaxial cable SMA (m) to mmcx (m)
Connect the mmcx end of the cable to A15J300, preselector tune output at the
upper left corner of A15 Front End Control Assembly.
Press Single on the analyzer. Verify the voltages in
frequency of the analyzer is changed.
Tolerances can be used as a guideline. The true test is whether or not the analyzer will function
and meet published specification.
If any of the preselector tune voltages do not match the levels shown in
4-7, the most probable causes are a misaligned YTF or the A15 Front End
Control Assembly. Perform the YTF characterization (press System,
Alignments, More, Ad vanced, Characterize Preselector).
Keysight N9010A EXA Service Guide
Table 4-7 YTF Tune Voltages
Center Frequency
(GHz)
5.0
a
10
b
15
b
20
b
26
a. Options 513 and 526
b. Option 526
Table 4-7
~ Tune Vol tage Tolerance
(VDC)
1.6
3.228
4.85
6.5
8.45
as the center
(VDC)
±0.5
±1.0
±1.0
±1.0
±1.0
Table
163