Keysight Technologies N9030B Service Manual page 215

Front End Control Troubleshooting
A15 Front End Control Assembly Troubleshooting
Table 6-12 Preselector Tune Output Voltages (Option 544, 550)
Center Frequency
(GHz)
5.0
10.0
15.0
20.0
25.0
30.0
40.0
42.5
43.5
45
50
Even if the voltages listed in the table are correct it does not guarantee the
proper control current is getting to the YTF. There is not a convenient way to
measure the control current, so if a high band issue is suspect it is
recommended that the A15 is changed out first before changing the YTF since
the A15 board has easy access.
N9030B PXA Signal Analyzer Service Guide
~ Tune Vol tage Valid Frequency
(VDC) Range Option
0.9 544, 550
1.8 544, 550
2.7 544, 550
3.6 544, 550
4.6 544, 550
5.5 544, 550
7.3 544, 550
7.75 544, 550
8.0 544, 550
8.25 550
9.2 550
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