Agilent Technologies E8285A Manual page 91

Replacing the Controller
Restoring Calibration Data in Controller Assembly
NOTE
Calibration data for the entire Test Set is stored in EEPROM on the
controller (CONTROLLER_-KIT) assembly, see
replacing the controller assembly, you must remove the "CAL
MODULE" daughter-board from the old controller assembly and install
it onto the replacement controller assembly to preserve the calibration
data for the instrument.
"Boot Code" is the firmware that initializes the Test Set on power-up. It
also is used at power-up to see if a firmware revision card has been
inserted in the PCMCIA card port. This code is stored in the "CAL
MODULE" daughter-board on the controller (CONTROLLER_-KIT)
assembly. If a new version of boot code needs to be installed, carefully
remove the old daughter-board and insert the new one, being careful of
the orientation. To replace the controller assembly:
1. Remove the external and internal covers, see
2. Locate the controller board (see
3. Carefully remove the CAL MODULE daughter-board from the
Figure 3-5 Controller and "CAL MODULE" Assemblies
CONTROLLER_-KIT
Covers" on page 87
the ribbon cables (see
original assembly and install it on the replacement.
J 1
(Not included in part list)
Figure 3-3 on page
Figure 3-5), and pull it out from the Test Set.
RBN_34CNDCT_28AWG
P 2
P 1
CAL MODULE
Disassembly and Replaceable Parts
Disassembly Procedures
Figure 3-5. When
"External and Internal
89), disconnect
CA_AY_RBN
J 4
J 1
0
C A
M O
L
D U
L E
J 1
1
controller3.eps
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