B&K Precision 4045B - Manual - Manual (Page 70)

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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 4045B: 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
freq 1000
freq 1e3
b) Program Header Separator