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16
2.3 Commands
2.3.1 Command Syntax
2.3.2 Notation
2.3.3 Examples
This section provides syntax and descriptions for remote commands.
The four letter mnemonic (shown in CAPS ) in each command sequence
specifies the command. The command mnemonic is optionally followed
by one parameter.
Many commands may take either set or query form, depending on
whether the ? character follows the mnemonic. Set only commands
are listed without the ? , query only commands show the ? after the
mnemonic, and optionally query commands are marked with a (?) .
Parameters in {} are required to set a value, and must be omitted for
queries.
Do not send ( ) or {} as part of the command.
Each command must be separately terminated with the ⟨ CR ⟩ character.
Null commands and duplicate whitespaces (including the ⟨ LF ⟩ character)
are ignored. Execution of the command does not begin until the command
terminator is received.
Symbol
Definition
i
Unsigned decimal integer
(?)
Required for queries; illegal for set commands
{ var }
Required parameter for set commands; illegal for queries
Each command is provided with a simple example illustrating its usage.
In these examples all data sent by the host computer to the SR446 are
upright teletype
set in
computer from the SR446 are set in
The usage examples vary with respect to set/query, optional parameters,
and token formats. They are not exhaustive, and are intended to provide
a convenient starting point for user programming.
1
The SR446 does not support compound (";") command formats.
SR446 400 MHz Programmable Gain Preamplifier
font, while responses received by the host
slanted teletype
2 Remote Operation
1
font.
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