Scpi keyword separator, Scpi optional keywords, Scpi specific and implied channel – Quantum Composers 9530 Series User Manual

Page 34: Scpi parameter types

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Page 34

9530/8530 Manual Version 4.8


:PULSE1:STATE ON <cr> <lf>

:PULSe1:WIDTh 0.000120 <cr> <lf>

:PULSe:POL NORMal <cr> <lf>


Any parameter may be queried by sending the command with a question mark appended. For
example:

SCPI Query Format

:PULSE1:STATE?

<cr><lf>

Will return

1

<cr><lf>

:PULSE1:WIDTH?

<cr><lf>

Will return

0.000120000 <cr><lf>

:PULSE1:POL?

<cr><lf>

Will return

NORM <cr><lf>

SCPI Keyword Separator

A colon (:) must always separate one keyword from the next lower-level keyword. A space must be
used to separate the keyword header from the first parameter.

SCPI Optional Keywords

Optional keywords and/or parameters appear in square brackets ( [ ] ) in the command syntax.
Note that the brackets are not part of the command and should not be sent to the pulse generator.
When sending a second level key word without the optional keyword, the pulse generator assumes
that you intend to use the optional keyword and responds as if it had been sent.

SCPI Specific and Implied Channel

Some commands, such as PULSe, allow specifying a channel with an optional numeric keyword
suffix. The suffix will be shown in square brackets [ 1 / 2 ]. The brackets are not part of command
and are not to be sent to the pulse generator. The numeric parameters correspond to the following
channels: 0 = T

0

, 1 = ChA,

2 = ChB, etc. Only one channel may be specified at a time.

If you do not specify the channel number, the implied channel is specified by the

:INSTrument:SELect

command or the last referenced channel.

After power-up or reset (*RST) the instrument will default to channel #1.

SCPI Parameter Types

The following parameter types are used:

<Numeric Value>

Accepts all commonly used decimal representation of
numbers including optional signs, decimal points, and
scientific notation:

For Example: 123, 123e2, -123, -1.23e2, .123, 1.23e-2,

1.2300E-01

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