Tektronix 2714, Programmer'S Manual

Page: 44 / 308

Instrument-Specific Message Structure
2–4
2714 & 2715 Programmer Manual
A:ON
and
B:ON
are arguments, and the comma (,) following
A:ON
is the argument
delimiter.
Some commands have no arguments, or only one argument, and may not require
header or argument delimiters. For instance, the command
GTL
returns the 2714 or 2715 to local control without adding arguments or delimiters.
A query consists of a query mnemonic or header, a question mark (?), header
delimiter, and an argument. Many queries do not require an argument.
For example, the query
CURve?
may be used with arguments
A
,
B
,
C
, or
D
to determine the contents of a display
register. The query
CFSF?
simply returns a response that indicates whether the on-screen frequency is
Center Frequency or Start Frequency.
A response is information returned as the result of a query. It consists of an
optional response mnemonic or header, header delimiter, argument(s), and
argument delimiter. For example,
CFSF CENTER
CFSF START
are the possible responses to the
CFSF?
query.
A header is a short name associated with each command, query, or response (for
example,
FREq
,
REF
,
MAR
). Whenever possible, headers are mnemonic in nature
so the name indicates the function.
A header delimiter is a blank space. Command headers, response headers, and
the question mark (?) following a query header are delimited or separated from
any following arguments by a space. The space is optional if there are no
arguments.
Digits are any of these numbers: 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9.
Query
Response
Mnemonic or Header
Header Delimiter
Digit