Keysight N9010B - Preselector Tune Output

Keysight N9010B EXA Signal Analyzer Service Guide 249
Front End Control Troubleshooting
A15 Front End Control Assembly Troubleshooting
Preselector Tune Output
The Presel Tune connector A15J302 is a test point used to verify the internal
A12, YIG Tuned Filter drive voltage variations with center frequency. The YTF is
used in the high band path (3.6 GHz to the analyzer’s maximum frequency).
Connect Presel Tune to a voltmeter. Use the MMCX (m) to SMB (f) to connect
to Presel Tune on the A15 board and appropriate adapters to connect to the
voltmeter. Refer to Figure 6-1 or Figure 6-2 or Presel Tune location. You may
also need a Banana plug to BNC (f) adapter, part number E9637A for the
Voltmeter. The preselector tune output voltage can be measured to verify this
portion of the A15 is functioning.
Press System, Alignments, Auto Align, Auto Align, Off on the analyzer once it
has fully booted to the spectrum analyzer application. Press Freq, Span, Zero
Span on the analyzer. The preselector tune output voltage in high band should
change when the center frequency of the analyzer is changed.
Preselector tune output measurements are not valid for Option 503, 3 GHz frequency range.
Table 6-11 Preselector Tune Output Voltages
Center Frequency
(GHz)
~ Tune Voltage
(VDC)
Valid Frequency
Range Option
5.0 1.6 507, 513, 526
10.0 3.3 513, 526
15.0 4.85 526
20.0 6.5 526
26.0 8.45 526
Table 6-12 Preselector Tune Output Voltages (Option 532,)
Center Frequency
(GHz)
~ Tune Voltage
(VDC)
Valid Frequency
Range Option
5.0 0.9 532, 544
10.0 1.8 532, 544
15.0 2.7 532, 544
20.0 3.6 532, 544
25.0 4.6 532, 544
30.0 5.5 532, 544
40.0 7.3 544