Agilent Technologies 8590 L-Series Spezifikationen Seite 587

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Seitenansicht 586
Chapter 13 587
Softkey Descriptions
Softkey Descriptions
CAL ATT ERR. These error corrections are
mathematical offsets of the digitized video signal on
the A16 processor/video assembly.
The first five entries in the “CA ATT ERR” column
are correction constants that correct amplitude
errors for the calibration attenuators on the A12
amplitude control assembly. Currently, the entry for
the 16 dB attenuator is not used.
The calibration attenuators on the A12 amplitude
control assembly are the amplitude reference for the
CAL AMPTD self-calibration routine. The five
constants are stored in nonvolatile memory initially
at the factory. The constants can be retrieved from,
and restored to, nonvolatile memory using the
procedures for backing up analyzer correction
constants in Chapter 3 . When required, new
constants are produced using the Cal Attenuator
adjustment procedures in Chapter 2 .
Refer to the
SET ATTN softkey description for more
information about the calibration attenuators on the
A12 assembly.
The second five entries in the “ERR” column are one
correction factor that provides a fine adjustment of
the reference-level during the
CAL AMPTD
self-calibration routine. The calibration routine
produces one video offset and stores it for all five
entries.
The video offset is used to make a fine
reference-level adjustment after a coarse
reference-level adjustment is done using the DAC
correction values from “RL-VENR.
R
ELATED SOFTKEYS CAL FREQ
CAL AMPTD
DEFAULT CAL DATA
CAL STORE
CAL FETCH
SET ATTN ERROR
CAL TIMEBASE
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