Keysight Technologies N9030B Service Manual page 74

Boot Up and Initialization Troubleshooting
Potential Problems During Boot Process
Table 2-3 Initial Alignments
Alignment Description
Main Loop YTO Pretune DAC
Offset Loop VCO Pretune Alignment
VCXO Tuning Curve
(Power up alignment only)
Measures the tuning voltage for the 100 MHz
VCO at a number of different frequencies. Uses
internal 10 MHz time base
VCXO Loop Band wid th
Adjusts gain of the PLL loop amplifier. Uses the
10 MHz internal reference
Second LO Tuning Curve
(Power up alignment only)
Measures the tune voltage for the 4800 MHz
VCO at a number of different frequencies. Uses
the 10 MHz internal reference
Second LO Loop Band wid th
Adjusts gain of the PLL loop amplifier. Uses the
10 MHz internal reference.
Ext Mix LO Alignment Algorithm
Dither Level Algorithm
(4 measurements)
AIF LC Wide Prefilter Passband Tuning
Algorithm
Adjusts the LC prefilter centering with the
prefilter BW set to about 1.12 MHz.
Uses 322.5 MHz Comb Calibrator on the A-IF.
AIF LC Wide Prefilter Passband Fine Tuning
Algorithm
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Most Probable Related Hard ware
Hard ware Failure
A14 Synthesizer A16 Reference board is not
providing correct 100 MHz
or 4.8 GHz signals.
A20 YTO output power low.
A14 Synthesizer A16 Reference board is not
providing correct 100 MHz
or 4.8 GHz signals
A16 Reference
A16 Reference
A16 Reference
A16 Reference
A13 Front End Assy A15 Front End Controller
A3 Digital IF
A2 Analog IF
A2 Analog IF
N9030B PXA Signal Analyzer Service Guide