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52 E1442A Command Reference Chapter 3
Command Separator A colon (:) always separates one command from the next lower-level
command as shown below:
[ROUTe:]SCAN:MODE?
Colons separate the root command from the second-level command
[ROUTe:]SCAN) and the second level from the third level
(SCAN:MODE?).
Abbreviated Commands The command syntax shows most commands as a mixture of upper- and
lowercase letters. The uppercase 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
lowercase letters. Therefore, MEASURE, measure, and MeAsUrE are all
acceptable.
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 the [ROUTe:] subsystem shown below:
>5287H@
CLOSe<channel_list>
CLOSe?<channel_list>
OPEN<channel_list>
OPEN?<channel_list>
SCAN<channel_list>
:MODE NONE|VOLT
:MODE?
The root command [ROUTe:] is an implied command (indicated by
square brackets [< >]). To close relays in a channel list, you can send
either of the following command statements:
>5287H@&/26H#
or CLOSe (@100:107, 201, 225)
These commands function the same closing channels 00 through 07 on
card 1 and channels 01 and 25 on card 2.