Agilent Technologies E8362B Service Manual page 112

Troubleshooting
Measurement System Troubleshooting
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 Name
A5 SPAM
A8 and A9 fractional-N synthesizer
A10 frequency reference
A11 phase lock
ALC source (P/O A12 source 20)
A13 frequency offset receiver
A16 test set motherboard
To view this EEPROM header information on the network analyzer display, select System,
Service, Utilities, View EEPROM Headers in the network analyzer application.
If the information is incorrect for any of the pc boards, contact Agilent Technologies. Refer
to "Contacting Agilent" on page
Error Messages
PHASE LOCK LOST: The level of the signal from at least one of the reference receivers, and
sensed by the A11 phase lock board, is too low to be accurately captured. this could be due
to a problem in the source group, signal separation group, or receiver group (refer to
"Checking the Source Group" on page
page 4-48, and "Checking the Receiver Group" on page
SOURCE UNLEVELED: The source ALC circuits on the A12 source or the A16 test set
motherboard—E8363B and E8364B only—is running open-loop. For the E8362B,
replacing the A12 source can correct this. For the E8363B or E8364B, check the cable
connections for W37 and W38 from the A23 and A24 detectors to the A16 test set
motherboard, and for W39 from A16 to the A21 SOMA 50. If the problem is associated with
one port and not the other, replace the detector associated with the problem port. If the
problem affects both ports, replace the A16 test set motherboard.
4-30
PC Board Part
Number
E8356-60006
E8364-60099
E8364-60136
E8364-60137
E8362-60001
E8364-60097
E8364-60138
2-13.
4-35, "Checking the Signal Separation Group" on
PNA Series Microwave Network Analyzers
E8362B, E8363B, E8364B
Memory Hardware
ID ID
3 6
3 8
3 10
3 11
3 12
3 13
3 16
4-52).
Service Guide E8364-90026
Firmware
Revision
A
C
B
C
B
A
C