9500B
Calibration Manual
92
Output and Target Amplitude control on this screen is similar to normal operation of the
9500B, either by digit edit method (cursor controls/spinwheel operating on one digit at a
time), or direct edit method (numeric keypad). At this point you have already chosen to
use either the default or saved value which is now shown on the screen.
At any time you can return to the Target Selection screen by pressing the EXIT softkey.
Selecting Default Calibration Targets
As mentioned earlier, the Model 9500B's firmware contains a complete set of
recommended target calibration values, for every hardware configuration of every
function that can be directly calibrated.
Before changing from 'Saved' calibration target values back to 'Default' target values,
consider that there may have been good reasons for choosing values other than default
values at the previous calibration. Your calibration standards may be uniquely
characterized at particular target values (for example, standard cells may provide a
calibration point voltage different from the default value). Using default target values
may therefore reduce the usefulness of historical calibration records.
•
If you decide to use default values, rather than the values at which your 9500B
was previously calibrated (assuming that the 'saved' and 'default' values are
different), simply press the DEFAULT TARGETS softkey on the Target
Selection screen.
•
The targets on the screen will have a new title: DEFAULT CALIBRATION
TARGETS, and the DEFAULT TARGETS soft key will be highlighted.
•
When passing to the Adjustment screen by selecting a target, the default target
value will be shown, and from this point, all targets will be default targets until
you change back to saved targets again, or decide to change the selected target
value.
•
Back on the Target Selection screen, pressing the DEFAULT TARGETS soft key
again will restore the title SAVED CALIBRATION TARGETS, and the target
values will revert to the saved values — i.e. the DEFAULT TARGETS key
toggles between the 'Saved' and 'Default' sets of target values.
Modifying a Calibration Target
Once the Adjustment screen is displayed, the existing target value can be changed to a
new value, if this is preferable to using either the default target value or a target value
'saved' from a previous calibration. The target value can be changed whether it starts as a
default or a saved target, but will always become a new saved target. The default target
values will not change.
To change the existing Target Amplitude:
•
Use the 'tab'
Δ
key to place the cursor on its value, then use the
ϑ
,
Κ
,
Λ
and
Μ
keys to set the required target amplitude.
