Agilent Technologies N5242A Service Manual page 98

Troubleshooting PNA Series Microwave Network Analyzers
Measurement System Troubleshooting N5242A
EEPROM Headers
The network analyzer application uses the firmware revision information stored in the pc
board header EEPROM. If the information stored in any EEPROM is incorrect, the
network analyzer may not operate properly.
The following table lists the pc boards in your network analyzer that contain EEPROM
headers. The pc boards are listed by name and part number and the correct firmware
revision code is given for each.
PC Board Part Memory Hardware Firmware
PC Board Name
Number Type ID ID Revision
To view this EEPROM header information on the network analyzer display: press
UTILITY , then Service , then Utilities , then View EEPROM Headers .
System
If the information is incorrect for any of the pc boards, contact Agilent Technologies. Refer
to "Contacting Agilent" on page 2-13.
Error Messages
SOURCE UNLEVELED: The source ALC circuit on the A19 test set motherboard is running
open-loop. Check the cable connections for the A21 HMA26.5 and the A19 test set
motherboard.
4-24 Service Guide N5242-90001