Chapter 3
Overview
© National Instruments Corp.
3-13
GPIB-410 User Manual
Option Ring Fields
These fields present a "ring" of options from which one is selected by
using the indicated keys. A selected option ring is distinguished by a
blinking single character prompt at the beginning of the field. The
prompt also designates which keys are used in the selection process.
•
The <+> and <-> keys
or
•
The left and right cursor control keys (the arrow keys)
Some option rings contain options which include sub-fields. These
fields can be of any of the three basic input types and only appear when
the associated option is active. A sub-field is automatically selected
whenever its parent field is selected, thus, you can modify the value of
either field by using the indicated keys.
Changing the value of the parent field causes the sub-field of the
deactivated option to be erased.
Key Select Fields
These fields present a grouping of several related fields, each of which
is a small option ring. A selected Key Select field is distinguished by
the presence of an individual key prompt either above or beside each
component field. Press the key indicated by each prompt to modify the
value of the associated component field.
Key Select fields are used primarily to manipulate the individual lines
or bits of the GPIB. These GPIB fields support the following additional
functions:
•
<Ins> - Use this key to enter any 8-bit ASCII character or
hexadecimal value directly into the data portion of the GPIB, for
example, type
<Ins>a
to insert the pattern
0 1 1 0 0 0 0 1
<Ins><Ins>35
to insert the pattern
0 0 1 1 0 1 0 1
