Agilent Technologies 8753ES Option 011 Service Manual page 148

Network analyzer

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Table of Contents

Adjustments and Correction Constants

Loading Firmware

— If any of the following LED patterns are present, the firmware disk may be defective.

— If any other LED pattern is present, the CPU board is defective.

If firmware did not load, a red LED on the CPU board will be flashing.

• If the following LED pattern is present on the CPU board, suspect the disk drive or

associated cabling:

(front of instrument ⇓)

Troubleshooting