Notes On Syntax; Required And Optional Letters; White Space; Terminator String - ILX Lightwave FPM-8200 User Manual

4
C H A P T E R

Notes on Syntax

Refer to Command Syntax on page 26 for a more complete discussion of syntax.
Here is a summary:

Required and Optional Letters

Commands must contain all of the letters shown in upper case in the definition.
Optional letters shown in lower case are useful for clarity, but must be in the
correct sequence. Upper/lower case does not matter to the FPM-8200.

White Space

A single white space must separate a command from its parameters or data.

Terminator String

If you encounter problems with GPIB communications, the terminator string can
be the cause. Refer also to your GPIB interface (controller) manual. The FPM-
8200 accepts <NL>, or <^END>, or <NL><^END> as a command line terminator.
Many computers terminate with <CR> <NL> <^END> (Carriage Return - New Line
- EOI). The FPM-8200 ignores <CR> (Carriage Return) as white space. The
FPM-8200 terminates its responses with <CR><NL><^END>, unless you use the
TERM command to change it.

Multiple Commands

You can put more than one command on a single line (same command string) if
you separate the commands with a semicolon.

Numeric Parameters

GPIB uses a flexible representation for numeric parameters called <nrf value>. It
means that you can represent numbers in integer or floating point form, or in
engineering/scientific notation. For example the number "twenty" may be
represented by any of the following ASCII strings:
Integer
Floating point
Scientific notation
There are no default values for omitted numeric parameters. If you omit a value,
you will get an error. See the table of error codes in Error Messages on page 71.
To enter data in non-decimal form, use one of the following prefixes:
40
 FPM-8200
G P I B C O M M A N D R E F E R E N C E
Notes on Syntax
20
20.0
2.0E+1
2.0e+1
+20
+20.0
+2.0E+1
+2.0e+1