Keysight Technologies X Series - Page 189

Keysight N9010A EXA Service Guide 189
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, More,
Ad vanced, Characterize Preselector) and re-check the control current at
various center frequencies.
In order to measure the control current correctly, press Single 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
a. Options 513 and 526
215 ±25
15
b
b. Option 526
324 ±30
20
b
430 ±40
26
b
560 ±50
Tolerances should be used as a guideline. The true test is whether or not the analyzer will
function and meet published specification.