ILX Lightwave FPM-8200, User Manual

Page: 46 / 96

R E M O T E O P E R A T I O N
Command Syntax
30
FPM-8200
C H A P T E R
3

characters are also interpreted as white space. Do not use white space before the
question mark in a query command.
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.
You can put more than one command on the same line (same command string) if
you separate them with a semicolon.
GPIB uses a flexible representation for numeric parameters: integer, floating point,
or engineering/scientific notation. There are no default values for omitted
parameters.
Some FPM-8200 device-dependent GPIB commands are compound commands,
in which the first mnemonic opens a path to a set of commands relating to that
path. The second mnemonic then defines the actual command.
Following are examples of invalid syntax command strings that will produce
errors:
Table 3.2 Invalid Syntax Command Strings
COMMAND COMMENT
Mode dB
Compound command, missing colon between
MODE
and
DB
.
Mode:dBm Range:Auto Missing semicolon between commands.
DIS ? Space not allowed before question mark in queries.
Ran3;dis?
Missing space between
Ran
and parameter
3
.
Disply ON Optional letters must follow the correct order.
Wave Wavelength parameter missing.