Calibration Constants Description - HP 8340B Manual

CALIBRATION CONSTANTS DESCRIPTION
Table A-3
lists
the calibration constants with
a
description of each.
The values
in the Range column
show
the amount of adjustment possible with the
cal
constant.
The numbers shown are the only
numbers you
should enter. You can enter values
out of the given range, but they do not
represent
the
values used by the instrument.
The
column labeled Significance gives the units associated
with the cal constant. For example, the
value entered for
LOCK DWELL TIME represents
the number of milliseconds the instrument waits,
after phase
lock, at
the beginning of
a
sweep, or at bandcross, before
it
continues
its sweep. Another
example
is the
ALC
9 GHz SLOPE, for
each count,
a
power compensation of 0.0025 dB/GHz
is
added
to
the RF output [if
10
is
entered, a
0.025 dB/GHz
slope
(10
times 0.0025
dB/GHz) is
added for
a
sweep
within
the 9
to 20 GHz
range].
Five
of the Cal Constants
[PRESET OPTION
(#56), HP-IB ADD
& LOCK (#57), RETRACE DWELL
(#58),
ATTENUATOR CONFIG (#59), and CONFIGURATION
(#60)]
use their
bit
configuration to store
more than one
piece of information. For
example,
the HP-IB
ADDRESS
sets up
the HP-IB address and
allows or disallows the
SHIFT LOCAL, SHIFT SAVE, and SHIFT RECALL
functions.
If
a
you
wish to
set
up an
HP-IB address of 19, disallow the
SHIFT LOCAL
and
RECALL
functions, and allow the
SHIFT SAVE
function, enter
179 for Cal Constant #57. You
find the appropriate calibration constant
(179
in
this
example)
by adding the appropriate
calibration
constants for the individual functions:
19
(HP-IB address)
32
(disallows
SHIFT LOCAL)
0
(allows
SHIFT SAVE)
128 (disallows
SHIFT RECALL)
"179
The other four
cal constants work the same way.
A-16 Assembly-Level Service Calibration Constants
HP 8340B/41B