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Response Header Options

The format of the returned ASCII string depends on the current settings of

the SYSTEM HEADER and LONGFORM commands. The general format is

<instruction_header><space><data><terminator>

The header identifies the data that follows (the parameters) and is controlled

by issuing a :SYSTEM:HEADER ON/OFF command. If the state of the

header command is OFF, only the data is returned by the query.

The format of the header is controlled by the :SYSTEM:LONGFORM

command. If long form is OFF , the header will be in its short form and the

header will vary in length, depending on the particular query. The separator

between the header and the data always consists of one space.

A command or query may be sent in either long form or short form, or in any

combination of long form and short form. The HEADER and LONGFORM

commands only control the format of the returned data and they have no

affect on the way commands are sent.

Example The following examples show some possible responses for a

:SELECT 2:MACHINE1:SFORMAT:THRESHOLD2? query:

with HEADER OFF:

with HEADER ON and LONGFORM OFF:

:SEL 2:MACH1:SFOR:THR2<white_space><data><terminator>

with HEADER ON and LONGFORM ON:

:SELECT 2:MACHINE1:SFORMAT:THRESHOLD2<white_space>

See Also Chapter 11, "SYSTem Subsystem" for information on turning the HEADER

and LONGFORM commands on and off.

Introduction to Programming

Response Header Options

1–17

HP 16500C Programmer's Guide

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