Agilent Technologies 8590 Series Service Manual page 605

SERVICE DIAG Service Diagnostics
D Provides access to the service-diagnostic softkey
ESCRIPTION
functions. For selected service softkeys, an abbreviation
for the active service function appears in the detector
display block. The display block is located in the upper
left-hand corner of the display.
R S
ELATED OFTKEYS
SET ATTN ERROR Set Attenuator Error
D Note that to avoid losing correction-constant data,
ESCRIPTION
make a backup copy of all correction data before
servicing the analyzer.
Refer to
location of the correction data.
The step attenuators on the A12 amplitude control
assembly are the relative amplitude reference for the
CAL AMPTD
(the 1 dB, 2 dB, 4 dB, and 8 dB steps) are used.
Currently, the 16 dB attenuator step is not used.
If the factory-loaded attenuator-correction constants
are no longer valid, new attenuator-correction
constants must be developed for the following
circumstances.
• A new A12 amplitude control assembly is installed.
• A new A16 processor/video assembly is installed.
• The battery-backed nonvolatile memory contains
errors caused by any one of the following.
Refer to
characterize the four attenuator steps and produce new
attenuator correction constants.
Chapter 13
Refer to Figure 13-1
DISPLAY CAL DATA
routine. Four of the five step attenuators
A dead BT101 battery.
Correction data accidentally altered by the user
after he has entered the passcode and gained
access to the
SERVICE CAL
Defective hardware on the A16 assembly.
"6. Cal Attenuator Error" Chapter 2
Softkey Descriptions
Softkey Descriptions
and Figure 13-2.
and
EDIT FLATNESS
softkeys.
to
for the
605