186 Keysight N9010B EXA Signal Analyzer Service Guide
RF Section Troubleshooting (RF/Microwave Analyzers)
Troubleshooting
If any of the preselector control currents do not match the levels in Table 4-16,
the most probable causes are a misaligned YTF or the A15 Front End Control
Assembly. Perform the YTF characterization (press System, Alignments,
Advanced, Characterize Preselector) and re-check the control current at
various center frequencies.
In order to measure the control current correctly, press Restart on the
analyzer in between each measurement.
Table 4-16 YTF Tune Current
Center Frequency
(GHz)
Control Current
(mA)
Tolerance
(mA)
5.0 106 ±20
10
a
215 ±25
15
b
324 ±30
20
b
430 ±40
26
b
560 ±50
a. Options 513 and 526
b. Option 526
Tolerances should be used as a guideline. The true test is whether or not
the analyzer will function and meet published specification.
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