Command Format - Racal Instruments 3151 User Manual

Command Format

SCPI Command Reference 4-2
Vertical Bar ( | ) Separate multiple parameter choices
Bold Typeface Letters Designate factory default values
Part of the OUTPut subsystem is shown below to illustrate the tree
system:
OUTPut
:FILTer
[:LPASs]
[:STATe] OFF|ON
[:STATe] OFF|ON
OUTPut is the root keyword of the command; FILTer and STATe are
second level keywords. FREQuency and STATe are third level
keywords. A colon ( : ) separates a command keyword from a lower
level keyword.
The format used to show commands in this manual is shown below:
FREQuency {<frequency>|MINimum|MAXimum}
The command syntax shows most commands (and some
parameters) as a mixture of upper and lower case letters. The upper
case letters indicate the abbreviated spelling for the command. For
shorter program lines, send the abbreviated form. For better program
readability, send the long form.
For example, in the above syntax statement, FREQ and
FREQUENCY are both acceptable forms. Use upper or lower case
letters. Therefore, FREQ, FREQUENCY, freq, and Freq are all
acceptable. Other forms such as FRE and FREQUEN will generate
an error.
The above syntax statement shows the frequency parameter
enclosed in triangular brackets. The brackets are not sent with the
command string. A value for the frequency parameter (such as
"FREQ 50e+6 ) must be specified.
Some parameters are enclosed in square brackets ([]). The brackets
indicate that the parameter is optional and can be omitted. The
brackets are not sent with the command string. If an optional
parameter is not specified, the generator uses a default value.
3151 And 3151A User Manual
:FREQuency {20MHz|25MHz|50MHz}