Agilent Technologies 8590 L-Series Especificações Página 605

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Chapter 13 605
Softkey Descriptions
Softkey Descriptions
SERVICE DIAG Service Diagnostics
DESCRIPTION Provides access to the service-diagnostic softkey
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
ELATED SOFTKEYS Refer to Figure 13-1 and Figure 13-2.
SET ATTN ERROR Set Attenuator Error
DESCRIPTION Note that to avoid losing correction-constant data,
make a backup copy of all correction data before
servicing the analyzer.
Refer to
DISPLAY CAL DATA and EDIT FLATNESS for the
location of the correction data.
The step attenuators on the A12 amplitude control
assembly are the relative amplitude reference for the
CAL AMPTD routine. Four of the five step attenuators
(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are no longer valid, new attenuator-correction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.
A dead BT101 battery.
Correction data accidentally altered by the user
after he has entered the passcode and gained
access to the
SERVICE CAL softkeys.
Defective hardware on the A16 assembly.
Refer to “6. Cal Attenuator Error” Chapter 2 to
characterize the four attenuator steps and produce new
attenuator correction constants.
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