Infinity
The representation of
inftity
is 9.9E + 37 for real numbers and 32767 for
Representation
integers. This is also the value returned when a measurement cannot be
made.
Sequential and
IEEE 488.2 makes the distinction between sequential and overlapped
Overlapped
commands. Sequential commands finish their task before the execution of
Commands
the next command starts. Overlapped commands run concurrently, and
therefore the command following an overlapped command may be started
before the overlapped command is completed. The overlapped
commands for the HP 1650B/51B are STARt, STOP, and
AUToscale.
Response
Generation
IEEE 488.2 defines two ties at which query responses may be buffered.
The first is when the query is parsed by the instrument and the second is
when the controller addresses the instrument to talk so that it may read
the response. The HP 1650B/51B will buffer responses to a query when it
is parsed.
Syntax
Diagrams
At the beginning of each of the following chapters are syntax diagrams
showing the proper syntax for each command. All characters contained in
a circle or oblong are
liter&
and must be entered exactly as shown.
Words and phrases contained in rectangles are names of items used with
the command and are described in the accompanying text of each
command. Each line can only be entered from one direction as indicated
by the arrow on the entry line. Any combination of commands and
arguments that can be generated by following the lines in the proper
direction is syntactically correct. An argument is optional if there is a
path around it. When there is a rectangle which contains the word
“space,” a white space character must be entered. White space is optional
in many other places.
Notation
The following conventions are used in this manual when describing
Conventions
programming rules and examples:
and Definitions
Programming and Documentation Conventions
HP
1650B/HP
16518
4-2
Programming Reference
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