Agilent Technologies 8590 Series Service Manual page 587

• 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
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
constants are produced using the Cal Attenuator
adjustment procedures in
Refer to the
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
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 S
ELATED OFTKEYS
CAL AMPTD
DEFAULT CAL DATA
CAL STORE
CAL FETCH
SET ATTN ERROR
CAL TIMEBASE
Chapter 13
self-calibration routine. The five
Chapter 3
SET ATTN
CAL FREQ
Softkey Descriptions
Softkey Descriptions
. When required, new
Chapter 2 .
softkey description for more
CAL AMPTD
587