HP 8642A Operation And Calibration Manual

Model 8642A/B
Operation
Knob (cont'd)
HOLD
Example of Controlling Knob Resolution by Setting Knob Increment
Use the Knob to increment frequency by 25 kHz. per step.
ENTRY
DATA
LOCAL
(keys)
~ []£J
" SET
OJ OJ
W
mV
~
(program
FRtS 25 KZ KI
codes)
Display
v
I 0 0.0 0 0 0 0 0 m z
FREO
I
KNOB
I
[ SHIFT I
INCR
I
(IJ
.IU/lt/7/ Tim'
I 1 u.U.l.I If
... rAPTD
Knob resolution has been set with the Knob Increment function as indicated by the
cursor over the "Z". Turning the Knob will step frequency in 2 5 kHz steps.
How
to Use Knob Hold to Maintain Control of a Function's Value When Another Function Is Active
Knob Hold is a way to maintain Knob control over one function while acquiring the
ability to change another function's value with the Step and Data keys and the Off/On
key. Knob Hold can be turned on by:
Selecting the desired active function, then HOLD «( SHIFT I G ), ( OFF ON ).
Knob Control is "held" on the selected function as indicated by the two cursors over
that "held" function. Selecting a different functIOn key sets that different function as
the active function (which can be acted on only by the Step keys, or Data keys, or the
Off/On key). Knob control does not transfer to this new active function, but stays with
the function that was active when Knob Hold was selected. (During Knob Hold, a
function with just one cursor is not controlled by the Knob; the function having two
cursors is controlled by the Knob.)
Turn off Knob Hold by selecting Knob HOLD ([ SHIFT I G) ( OFF ON I. Knob
Hold (along eith all other Knob-related functions) can also be turned off by selecting
ENTR Y OFF ( ( SHIFT I ( RF OFF/ON) ).
3-143

HP 8642A Specifications

General

Brand	HP
Model	8642A
Category	Inverter
Language	English