Programming
3
Keysight 53147A/148A/149A Operating and Programming Guide
167
Using Multiple Commands
Program Messages
Program Messages are a combination of one or more properly formatted SCPI
Commands. Program messages always go from a computer to the instrument.
They are sent to the instrument over its GPIB or serial interface as a sequence of
ASCII data messages.
Program Message Syntax
shows the simplified syntax of a program message. You can see
Common Commands and Subsystem Commands in the same program message.
If you send more than one command in one message, you must separate adjacent
commands with a semicolon.
<new line>
= ASCII character decimal 10
^END = EOI
asserted concurrent with last byte
Figure 3-10
Simplified Program Message Syntax Diagram
When using IEEE 488.2 Common Commands with SCPI Subsystem commands on
the same line, use a semicolon between adjacent commands. For example:
*RST;:SENS:AVER ON
When multiple subsystem commands are sent in one program message, the first
command is always referenced to the root node. Subsequent commands,
separated by “;”, are referenced to the same level as the preceding command if no
“:” is present immediately after the command separator (the semicolon).
;
Subsystem Command
<new line>
Common Command
^END
^END
<new line>
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