66
Boot Up and Initialization Troubleshooting
Potential Problems During Boot Process
AIF Step Gain Algorithm
Measures the relative gain of the IF for high gain (10 dB)
versus the low gain (0 dB) paths. In normal instrument
operation these two states can be controlled by the user
interface key called “Swept IF Gain”.
Uses the Comb calibrator on the A-IF
A2 Analog IF
AIF 140 Variable Gain Alignment Algorithm
(Option B85, B1A, or B1X)
A25 Wideband A-IF
LO Power Alignment Algorithm
Measure max LO power then backs off for each band
A13 Front End
Assembly or A15 Front
End Controller
AIF Variable Attenuator Algorithm
Measures the gain in all settings of the A-IF 1 dB step
attenuator. A reference power is measured with atten
4dB
The Comb calibrator on A-IF is used to provide a CW
signal.
A2 Analog IF
Mechanical Attenuator Algorithm
Measures the attenuation of all DC coupled, and one AC
coupled (10 dB) settings of the RF input attenuators.
Reference atten setting is 10 dB
A9 and A10 RF Input
Attenuators
50 MHz calibrator on A16
Reference
Electrical Attenuator Algorithm
Each setting from 0 to 24 dB in steps of 1 dB is
measured. The reference condition is electrical
attenuator set to 0 dB and RF input attenuators set to 10
dB. (Option EA3)
A13 Front End 50 MHz calibrator on A16
Reference.
Electrical Attenuator Tail Algorithm
Attenuation set to 0 dB (Option EA3)
A13 Front End
AIF 140 Variable Attenuator Algorithm
Ref power at atten 12 dB (Option B85, B1A, or B1X)
A25 Wide band A-IF
DIF 40 Variable Attenuator Algorithm
Ref power at atten 21 dB (Option B40)
A3 Digital IF
Table 2-2 Initial Alignments
Alignment Description Most Probable
Hard ware Failure
Related Hardware
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