R E M O T E O P E R A T I O N
Command Syntax
7/01
LDC-3700 Series
41
C H A P T E R
3
Terminators
A program message terminator identifies the end of a command string. These are the valid
terminator sequences:
•
<NL>
•
<^END>
•
<NL><^END>
Many computers terminate with <CR><NL><^END> (Carriage Return − New Line − EOI). A carriage
return (<CR>)is read as white space.
The LDC−3700B terminates its responses with <CR><NL><^END>, unless you use the
TERM
command to change it.
If you encounter problems with GPIB communications, the terminator string can sometimes be the
cause. Refer also to your GPIB interface (controller) manual.
Command Separators
You can put more than one command on the same line (same command string) if you separate them
with a semicolon. The semicolon can be preceded by one or more spaces. Examples:
TEC:DIS 1; tec:set:t?;
TEC:MODE:t ; TEC:T 25 ; TEC:Const 1, 2, 3.5 ; TEC:OUT 1g1
Parameters
Some commands require a parameter. The parameter must be separated from the command by at
least one space.
The syntax symbol
<nrf value>
refers to the flexible numeric representation defined by the GPIB
standard. It means that you can represent numbers in integer or floating point form, or in
engineering/scientific notation. The IEEE−488.2 standard uses the names NR1, NR2, and NR3
respectively to denote "integer", "floating point", and "scientific notation". For example the number
"twenty" may be represented by any of the following ASCII strings:
For more information on these definitions, refer to the IEEE−488.2 standard.
There are no default values for omitted parameters. If a command is expecting a parameter and
none is entered, an error is generated.
Integer
20
+20
NR1
Floating point
20.0
+20.0
NR2
Scientific notation
2.0E+1
2.0e+1
+2.0E+1
+2.0e+1
NR3
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