HP 8340b Operating Instructions

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

HP 8340b Specifications

General

Brand	HP
Model	8340b
Category	Inverter
Language	English