B&K Precision 4040B - Manual - Manual (Page 52)

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or query. The Program Message is terminated by the
Program Message Terminator.
The Program Message Terminator consists of optional
white space characters, followed by the Linefeed (LF)
character (0x0A).
The Program Message Unit can be divided into
three sections as follows:
a) Program Header
The Program Header represents the operation to be
performed, and consists of ASCII character mnemonics.
Two types of Program Headers are used in the
MODEL 4040B: Instrument-control headers and Common
Command and Query headers. Common Command and
Query Program Headers consist of a single mnemonic
prefixed by an asterisk ('*').
The mnemonics consist of upper - or lower-case alpha
characters.
Example: The command to set the frequency to
1KHZ may be written in the following ways:
FREQ 1KHZ
FREQ 1000HZ
FREQ 1000
FREQ 1E3
freq 1khz
freq 1000hz