Program Message Terminator; Program Message Unit Separator - ILX Lightwave OMM-6810B User Manual

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C H A P T E R
<PROGRAM MESSAGE TERMINATOR>
When a command is sent using the standard format, the host computer (or GPIB
driver) usually puts a <CR><NL><^END> (carriage return-line feed-EOI) on the
data bus following the command string. The IEEE-488.2 standard requires either
<NL><^END>, <NL>, or <^END> as an acceptable <PROGRAM MESSAGE
TERMINATOR>, while the <CR> is treated as <white space> (ignored). The
6810B accepts any <PROGRAM MESSAGE TERMINATOR> shown in Figure
3.3. The 6810B terminates its responses with a <NL><^END> (unless the user
changes the terminator via the TERM command).
If you encounter problems with GPIB communications, refer to your GPIB driver
manual for the exact syntax of the output terminator.
<PROGRAM MESSAGE UNIT SEPARATOR>
A <PROGRAM MESSAGE UNIT SEPARATOR> is used to separate sequential
<PROGRAM MESSAGE UNIT> elements (commands) from one another within a
<PROGRAM MESSAGE>. The syntax for a <PROGRAM MESSAGE UNIT
SEPARATOR> is shown in Figure 3.4.
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 OMM-6810B
G P I B / I E E E 4 8 8 . 2 R E M O T E O P E R A T I O N
ANSI/IEEE-488.2 Definitions
<nrf value>
Figure 3.2 Suffix Syntactic Diagram
<white space>
Figure 3.3 <PROGRAM MESSAGE TERMINATOR> Syntax Diagram
<white space>
<suffix unit>
/
NL
^END
^END
NL