HP 8340B Manual page 209

Procedure to Access Calibration Constants
In the
adjustment procedures,
calibration constants stored
in
working memory
will
be changed
(adjusted).
A
calibration
constant can
be accessed by pushing the following key sequence:
[SHIFT] [GHz] [number of the Cat. Constant,
1
to
99] [Hz]
[SHIFT] [MHz]
[1] [2]
[Hz]
[SHIFT] [kHz] [2] [2] [Hz]
The ENTRY DISPLAY
will indicate the calibration constant number on the left and the present value on
the
right.
Use the
STEP
keys to select
a
different calibration constant number.
The ENTRY
keyboard
or the front panel rotary knob can
be used to
change
the value. After the
new
value has been entered,
press
the [Hz] key to retain the
new values
in "working memory area."
Procedure to Store the Calibration Constants
After adjustments
of the calibration constants are completed, the data thus stored in the "working
memory area" should be
copied to the "protected memory
area"
by pressing
the
following key
sequence:
[SHIFT] [MHz] [1] [4] [Hz]
[SHIFT] [kHz] [5] [3] [4] [9] [Hz] Wait
for
"CALIBRATION RESTORED"
to be displayed
in
the
ENTRY
DISPLAY and then press [INSTR PRESET].
HP8340B/41B
Adjustments 5-3