Keysight Technologies Option 503 Service Manual page 76

Boot Up and Initialization Troubleshooting
Potential Problems During Boot Process
Table 2-3 Initial Alignments
Alignment Description
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 4 dB
The Comb calibrator on A-IF is used to provide
a CW signal.
AIF 140 Variable Gain Alignment Algorithm
(Option B1X)
The 300 MHz CW calibration signal on this WB
Analog IF assembly is used.
Searches for the DAC value that gives the
closest power level to the target level.
DAC value 0 gives the highest gain; value 255
gives the lowest gain
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
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)
Electrical Attenuator Tail Algorithm
Attenuation set to 0 dB (Option EA3)
LO Nulling Full Alignment Algorithm
Looks for optimum I and Q over large range
LO Nulling Min Alignment Algorithm
Looks for optimum I and Q over small range
LO Nulling Full MB Alignment Algorithm
MB = medium bandwidth
LO Nulling Min MB Alignment Algorithm
LO Nulling Full WB Alignment Algorithm
WB = Wide Band (Option B1X)
LO Nulling Min WB Alignment Algorithm
76
Most Probable Related Hard ware
Hard ware Failure
A2 Analog IF
A25 Wideband A-IF
A9 and A10 RF 50 MHz calibrator on A16
Input Attenuators Reference
A13 Front End 50 MHz calibrator on A16
Reference.
Control signals from A15
Front End Controller
A13 Front End
A13 Front End
A13 Front End
A13 Front End
A13 Front End
A13 Front End
A13 Front End
N9030A PXA Signal Analyzer Service Guide