Agilent Technologies 8719ET Service Manual page 110

Adjustments and Correction Constants
Loading Firmware
In Case of Difficulty
If the firmware did not load successfully, LED patterns on the front panel can help you
isolate the problem.
• If the following LED pattern is present, an acceptable firmware filename was not found
on the disk. (The required format for a firmware file name is 8720ET_07._60 or
8720ES_07._60). Check that the firmware disk matches your network analyzer model.
Chan 1 Chan 2
• If any of the following LED patterns are present, the firmware disk may be defective.
Chan 1 Chan 2
• 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.
NOTE
If the following LED pattern is present on the CPU board, suspect the disk drive or
associated cabling:
3-38
LED Pattern
Chan 3 Chan 4
LED Pattern
Chan 3 Chan 4
(front of instrument ⇓)
RF Network Analyzers
R L T
R L T
8719ET/20ET/22ET
8719ES/20ES/22ES
S
S
Service Guide