ILX Lightwave LDC-3700C Series, Руководство пользователя, Страница: 65 / 176

R E M O T E O P E R A T I O N
Command Syntax
04_09 LDC-3700C Series
49
C H A P T E R
3
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Terminators
A program message terminator identifies the end of a command string. For GPIB,
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.
For USB, the only valid terminator is <NL>.
The LDC-3700C terminates its responses with <CR><NL><^END>, unless you
use the
TERM
command to change it.
If you encounter problems with remote 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.
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