User`s manual

58 Agilent E1330B Digital I/O Module Command Reference

Chapter 5

Command

Separator

A colon (:) always separates one command from the next lower level command. This

is illustrated as follows:

MEASure:DIGital:DATAn:VALue?

Colons separate the root command from the second level (MEASure:DIGital) and the

second from third level (

DIGital:DATAn), and so forth.

Abbreviated

Commands

The command syntax shows most commands as a mixture of upper and lower case

letters. The upper case letters indicate the abbreviated spelling for the command. For

shorter program lines, send the abbreviated form. For better program readability, you

may send the entire command. The instrument will accept either the abbreviated

form or the entire command.

For example, if the command syntax shows

MEASure, then MEAS and MEASURE

are both acceptable forms. Other forms of

MEASure, such as MEASU or MEASUR

will generate an error. You may use upper or lower case letters. Therefore,

MEASURE, measure, and MeAsUrE are all acceptable.

Command keywords can be entered in their full form, as shown above, or can be

entered in their short form. In this manual, the entry required in short form

commands is always capitalized. The short form is generally used for examples in

this manual.

Implied

Commands

Implied commands are those which appear in square brackets ([]) in the command

syntax. (Note that the brackets are not part of the command and are not sent to the

instrument.) Suppose you send a second level command but do not send the

preceding implied command. In this case, the instrument assumes you intend to use

the implied command and it responds as if you had sent it. Examine this excerpt from

the

[SOURce:] subsystem shown below:

[SOURce:]

DIGital

:DATA

[:VALue] <parameter>

:BIT

m <parameter>

Both the root command [SOURce:], and forth level command [:VALue], are implied

commands. To set the instrument to output a logical 1 to bit 0 of port 3, you may send

either:

SOURce:DIGital:DATA3:BIT0 1 or DIGital:DATA3:BIT0 1

Note You must include a space between the keywords and any parameters.