Troubleshooting Guide 5
Keysight N8262A Service Guide 77
Performance Test
Type of failures Debug tips Possible faults
1 mW power reference level
failures
Attempt to adjust the 1 mW
Power Reference Level
Calibrator Assembly (high
probability)
Mother Board (low probability)
VSWR failures Not applicable Calibrator Assembly
Time base frequency accuracy
failures
– Check that the SMB cable
being used is not damaged
– Check that the SMB is
connected to ‘Trig Out’, not
‘Trig In’
Mother Board
Zero set (average path) failures Not applicable Mother Board
Zero set (peak path) failures Not applicable Mother Board
Linearity (average path) failures
Not applicable Mother Board
Linearity (peak path) failures
Replace the measurement board
assembly for the channel to see if
this clears the fault
– Measurement board assembly
(low probability)
– Mother board (high
probability)
Rise/Fall time (peak path) failures
Check/reseat the sensor flex RF
connections
– Sensor flex assembly (low
probability)
– Measurement board assembly
(low probability)
– Mother board (high
probability)
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