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Getting Started
Revolving Menus
Revolving menus allow you to select one of the available HP 3421A functions.
Revolving menus are
distinguished by a tilde (~) in the display.
Use the vertical arrow keys to choose among the available
options in a revolving menu.
For example, the = TF IF program asks for the function to be measured with this prompt:
FH~ [DC YWolts
Press the arrow keys (Av) until the desired option
appears, then press [ENDLINE] to select the option. The
menu "wraps around", so that pressing
repeatedly will
eventually display the first option.
Choices
Choices allow you to select one option from a short list. The choices are usually presented in parentheses
or after a colon:
Degrees:
(CF KE or E27
This message asks you to press
for Celsius units,
for
Fahrenheit units,
for Kelvin units, or [R] for Rankine
units.
Derurite file CYSHIT
This message asks you to press
to overwrite a file, or
to preserve the file.
Prompts
Prompts request you to enter numbers or file names. They are also distinguished by the presence of a
blinkng cursor just after the question mark. Unlike choices, prompts require an
ENDLINE
keystroke to
complete the entry. The character editing keys such as [€], [>] and
are available for use as you enter
the response.
Data file?
The program is asking you to type the name of a file,
_
followed by [ENDL INE ) .
In response to a prompt for a number, you can enter a numeric expression. For example:
Ho.
of scans?
Entering =:=% 14 is the same as entering 4:2.
=z#%14
[ENDLINE
2-17
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