N9030B PXA Signal Analyzer Service Guide 79
Boot Up and Initialization Troubleshooting
Potential Problems During Boot Process
Low Band Preamp Path System Gain Algorithm
Aligns low band (3 Hz to 3.6 GHz path) with
preamp ON.
Input attenuator set to 20 dB.
(Options P03, P08, P13, P26, P43, P44, P50)
A13 Front End 50 MHz calibrator on A16
Reference.
A9 and A10 Input
attenuators
Low Band Elec Atten Path System Gain
Algorithm
Aligns low band with electronic attenuator in
the signal path and set to 0 dB.
(Option EA3)
A13 Front End 50 MHz calibrator on A16
Reference.
A9 and A10 Input
attenuators
Preselector Two Point Tuning Algorithm
Aligns the YTF preselector centering near the
maximum and minimum frequency points of the
YTF.
Uses the high band preamp noise as stimulus
signal.
A12 YTF Preselector
or
A15 Front End
Controller
or
All Low Band
A13 Front End
High Band Nominal Path System Gain
Algorithm
Anything in Band 1
signal path
4800 MHz calibrator on A16
Reference
Low Noise Path System Gain Algorithm
Measures change in signal level with low noise
path switched ON and OFF, then computes
system gain.
(Option LNP)
SW3 4800 MHz calibrator on A16
Reference
A15 Front End Controller
High Band Preamp Path System Gain
Algorithm
Measures change in signal level with high band
preamp turned ON and OFF.
Input attenuator set to 30 dB.
(Options P08, P13, P26, P43, P44, P50)
A11 Low Band
Switch
4800 MHz calibrator on A16
Reference
A9 and A10 Input
attenuators
A15 Front End Controller
High Band Preselector Bypass Path System
Gain Algorithm
A12 YTF Preselector is bypassed and amplitude
of 4800 MHz calibrator measured. System gain
is then computed. (Option MPB)
SW 1 and SW 2,
coax switches and
cabling
A15 Front End Controller
4800 MHz calibrator on A16
Reference
A9 and A10 Input
attenuators
Table 2-3 Initial Alignments
Alignment Description Most Probable
Hard ware Failure
Related Hard ware
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