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KNOB/STEP Entry
DESCRIPTION
The rotary
[KNOB]
and
[STEP]
keys affect the function that is presently being shown in the ENTRY
DISPLAY.
[ENTRY OFF]
blanks the ENTRY DISPLAY.
PANEL LAYOUT
STEP
FUNCTIONS
[ENTRY OFF]
(HP-IB:
EF) blanks (turns off) the ENTRY DISPLAY, and disables the
[STEP]
keys and
the rotary
[KNOB],
When any function key is pressed ENTRY DISPLAY is reactivated, the
ON
indicator next to
[ENTRY OFF]
lights, and the
[KNOB]
and
[STEP]
keys are enabled. To blank the
ENTRY DISPLAY without disabling the
[KNOB]
or
[STEP]
keys press
[SHIFT] [CONT]
(as described
in Figure 3-6)
[SHIFT] [ENTRY OFF]
(HP-IB:
SHEF) recalls the Calibration Constant Access Function. This com¬
mand is used when one wishes to re-enter the calibration constant mode after just exiting it. This
saves the trouble of entering the long Cal Constant key sequence again.
ROTARY KNOB
(HP-IB:
EK) allows analog-type adjustment of the function shown in the ENTRY
DISPLAY. Press any function key to activate that function, then turn the rotary
[KNOB]
to obtain the
desired value.
[SHIFT] [CW]
in'figure 3-7 explains the procedure for adjusting the sensitivity of the
rotary Knob. Although the
[KNOB]
has the feel of an analog control, it is actually a digital control that
generates 120 pulses per revolution (the
[KNOB]
is frequently referred to as an RPG - rotary pulse
generator - in service literature).
[SHIFT] ROTARY KNOB:
[SHIFT]
does not affect the rotary
[KNOB],
Figure 3-8.
KNOB/STEP Entry (1 of 2)
3-22
Operating Information
HP 8340B/41B
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