HP 1652B Getting Started Manual page 115

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Hex(adecimal) Keypad. The HEX keypad allows you to enter numeric
values in numeric entry fields. You enter values in the four number
bases below:
l Binary
l
Octal
l
Decimal
l
Hexadecimal
The A through F keys are used for both hexadecimal and alpha
character entries.
CHS Key. The CHS (change sign) key allows you to change the sign
( +) of numeric variables.
Roll Keys. When part of the data display is off screen, the ROLL keys
defme which way the KNOB will move the displayed data. These keys
and the KNOB roll displayed data up/down or left/right so you can
view off-screen data.
Knob. The KNOB has four major functions depending on what menu
or pop-up menu you are in. The KNOB allows you to do the following:
Move the cursor from field to field within the System
Configuration and main menus.
Roll the display left or right and up or down.
Position the cursor on options within pop-up menus.
Increment/decrement numeric values in numeric pop-up menus.
Select Key. The SELECT key allows you to open pop-up menus,
choose options in them, cancel selections, and close pop-up menus.
When the cursor is in a main menu (i.e. Format Specification) pressing
the SELECT key either opens a pop-up, or toggles options (when there
are only two options possible) in that field.
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Using the Front-Panel User Interface
HP 16528/1653B
3-4
Front-Panel Reference