Keysight Technologies X Series Service Manual page 189

RF Section Troubleshooting (RF/Microwave Analyzers)
Troubleshooting
In order to measure the control current correctly, press Single on the analyzer in between each
measurement.
If any of the preselector control currents do not match the levels in
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) and re-check the control current at
various center frequencies.
Tolerances should be used as a guideline. The true test is whether or not the analyzer will
function and meet published specification.
Keysight N9010A EXA Service Guide
Table 4-16 YTF Tune Current
Center Frequency
(GHz)
5.0
a
10
b
15
b
20
b
26
a. Options 513 and 526
b. Option 526
Control Current
(mA)
106
215
324
430
560
Table 4-16,
Tolerance
(mA)
±20
±25
±30
±40
±50
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