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R E M O T E O P E R A T I O N
Command Syntax
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LDC-3700C Series
C H A P T E R
3
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Command Syntax
This section describes command syntax and structure. You need this information
to effectively write USB or GPIB control programs. The syntax of remote
commands follow the rules defined in the ANSI/IEEE 488.2-1987 standard.
Letters
Any remote command or query must contain all of the letters which are shown in
upper case in the command definition. Some of the device dependent commands
include additional optional letters shown in lower case in the command reference
(Chapter 4, Command Reference). Upper/lower case does not matter, it is used
in this manual to identify optional letters. The optional letters must be in the
correct sequence. Some examples of what works, and what does not:
White Space
"White space" is normally the space character (space bar). A single white space
must separate a command from its parameters or data. For example:
To enhance readability you can also use one or more white spaces before a
comma, semicolon, or terminator. Since your computer normally puts the
terminator at the end of each command string (line), this simply means that an
extra space character at the end of your command line works OK.
A query has no space between the mnemonic and the question mark. For
example:
Note that too many consecutive white spaces can overflow the 256-byte data I/O
buffer.
Okay Not Okay
DIS DS
Disp dsp
Displ dply
Displa DSPLY
Display disply
Okay Not Okay
DELAY 500 DELAY500
Okay Not Okay
TIMER? TIMER ?