Keysight Technologies N9040B UXA Signal Analyzer Service Guide 69
Boot Up and Initialization Troubleshooting
Potential Problems During Boot Process
AIF 255 UW Band 1 Chirp Cal Alignment
Algorithm
A21 Wideband Analog IF
AIF 500 UW Band 1 Chirp Cal Adjustment
Algorithm
A21 Wideband Analog IF
Could be either WB AIF
assemblies. See if AIF 510
Chirp Cal fails also.
Uses 1.2 GHz internal cal
signal (not viewable on
screen) and it is possible an
external signal at the RF
input will interfere.
Assure no external signals
connected. Band 1 is > 3.6
GHz, high band path.
AIF 500 UW Band 1 Chirp Cal Alignment
Algorithm
E Cal Path System Gain Algorithm Signal path from A13 Front
End to A3 Digital IF
A16 Reference may not be
providing 50 MHz E-Cal
Low Band Nominal Path System Gain
Algorithm
A13 Front End 50 MHz calibrator on A16
Reference.
A9 and A10 Input attenuators
Low Band Preamp Path System Gain Algorithm A13 Front End 50 MHz calibrator on A16
Reference.
A9 and A10 Input attenuators
Low Band Elec Atten Path System Gain
Algorithm
A13 Front End 50 MHz calibrator on A16
Reference.
A9 and A10 Input attenuators
Preselector Two Point Tuning Algorithm A12 YTF Preselector
or
A15 Front End Controller
or
All Low Band
A13 Front End
High Band Nominal Path System Gain
Algorithm
All Front End components 4800 MHz calibrator on A16
Reference
Table 2-2 Initial Alignments
Alignment Description Most Probable Hardware
Failure
Related Hardware
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