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3
C H A P T E R
LDX-32420 Current Source Command Set
For the most efficient and effective remote control of your LDX-32420 High Power
Precision Current Source, we recommend you study the following sections. You
will learn about command syntax, IEEE488 Command Commands and the most
used device dependent commands. Later in this chapter you will be introduced to
the error and status registers.
This information is for sending instrument commands through the GPIB or USB
computer interfaces.
Command Syntax
Any command or command query must contain all of the letters that are shown in
the LDX-32420 Command Path Structure, Figure 3.1. However, the Current
Source's command parser is NOT CASE SENSITIVE so upper or lower case may
be used in any combination. The lower case letters shown with the Device
Dependent commands in Chapter 4 are optional letters and may be used for
clarity. For example, the following commands are equal:
• LAS:DIS 1
• LAS:Dis 1
• LAS:DISPLAY 1
In this example, only the first three letters "DIS" are required, while the other
letters, "play" are optional. These optional letters must be used in the proper
sequence as shown.
The syntax of the commands follows the rules laid out in the GPIB-IEEE488
standard. Colons (:) indicate the start of a new command path, while semicolons
(;) indicate a separation of commands within a command string. A leading colon
on a command may be used to return the LDX-32420 command parser to the
command path root (see Figure 3.1).
Spaces or white space may be used to separate commands and/or data (after the
command header or query question mark). Spaces or white space must be used
to separate the command (header) from the first parameter (or program data). The
following examples show valid syntax for commands:
• LAS:display:ldi
• Laser:limit:ldi 400
• LAS:DIS 1; las:set:ldi?
• Las:MODE:Mdp; LAS:OUT 1
28
LDX-32420
R E M O T E O P E R A T I O N
LDX-32420 Current Source Command Set
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