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5
Troubleshooting Guide
Extended Self-Test
Instrument
Keypad
Bitmap display
Performance Test
Type of failures
1 mW power reference level failures
VSWR failures
Zero set (average Path) failures
Linearity (average path) failures
Power Reference Level Adjustment Problems
Possible faults
– Calibrator assembly (high probability)
– Main board (low probability)
74
Purpose
Verifies the operation of every key
(apart from the power button)
Verifies that all pixels in the display
can be illuminated in various colors
Debug tips
Attempt to adjust the 1 mW power
reference level
Not applicable
Not applicable
Not applicable
Keysight N1913B/N1914B EPM Series Power Meters Service Guide
Debug tips
Not applicable
Not applicable
Possible faults
Calibrator assembly (high probability)
Main board (low probability)
Calibrator assembly
Main board
Main board
Possible faults
Front panel (defective
keymat or key flex
circuit)
Front panel (defective
display, display
interface board, or
inverter board)
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