To Check The External Monitor Output Port; To Check The External Trigger Input; To Check The Gpib; To Check The Usb - Keysight E4990A Troubleshooting Manual

To Check the External Monitor Output Port

To Check the External Trigger Input

To Check the GPIB

To Check the USB

Impedance Analyzer
Step 2.
Verify that the mouse buttons work normally. If any
button does not work or the mouse pointer does not move, a failure
in the mouse or the A60 CPU Module is suspected.
Procedure
Step 1.
Connect an external VGA color monitor to the External
Monitor Output Port on the E4990A rear panel.
Step 2.
Turn the external monitor on.
Step 3.
Verify that the monitor screen view is the same as the
display on the LCD. If the monitor screen view is abnormal, a failure
seems to be in the A60 CPU module.
Procedure
Step 1.
Press
Step 2.
Press Trigger Mode key.
Step 3.
Click External in the menu bar to set the trigger mode to
External.
Step 4.
Connect a BNC Short or 50 ohm termination to the
External Trigger Input Port on the rear panel and disconnect it. A
measurement trigger should be generated and a measurement
result should be refreshed.
Step 5.
If no trigger occurs, a failure in the A51 DSP board is
suspected.
Procedure
Perform the E4990A Performance Test program. If the controller
cannot detect the E4990A, the problem seems to be in the A60
CPU module.
Procedure
key.
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Troubleshooting
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