Communication Interface Failures; Additional Diagnostic Tests - Keysight N1913B EPM Series Service Manual

Communication Interface Failures

Type of communication
GPIB communication
LAN/USB communication

Additional Diagnostic Tests

Type of functionality
USB/LAN functionality
Sensor functionality
Keysight N1913B/N1914B EPM Series Power Meters Service Guide
Debug tips
Check/reseat the ribbon cable
connecting the PPMC to the main board
Check visually to see whether or not the
connector is obstructed/damaged
Reason
The N7800 Series software only tests
functionality over GPIB
The N7800 Series software does not
prove both paths of the sensor flex
assembly
Possible faults
Ribbon cable (low probability)
Main board (high probability)
Carrier board
Recommended test method
Check the DUT responds when
is sent to it via the USB/LAN
interfaces
Connect an E4412A sensor to the
DUT and ensure it can be zeroed/
calibrated
Troubleshooting Guide
Possible faults
*RST Carrier board
Sensor flex assembly
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