Racal Instruments 3155, User Manual

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User Manual 3155
Programming Reference 4-14
FREQUENCY are both acceptable forms. Use upper or lowercase
letters. Therefore, FREQ, FREQUENCY, freq, and Freq are all ac-
ceptable. Other forms such as FRE and FREQUEN generates an er-
ror.
The above syntax statement shows the frequency parameter en-
closed 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.
Command Separator
A colon ( : ) is used to separate a command keyword from a lower
level keyword as shown below:
SOUR:FUNC:SHAP SIN
A semicolon ( ; ) is used to separate commands within the same
subsystem, and can also minimize typing. For example, sending the
following command string:
TRIG:SLOP NEG;COUN 10;TIM 5e-3
is the same as sending the following three commands:
:TRIG:SLOP NEG
:TRIG:COUN 10
:TRIG:TIM 5e-3
Use the colon and semicolon to link commands from different sub-
systems. For example, in the following command string, an error is
generated if both the colon and the semicolon are not used.
OUTP:STATE ON;:TRIG:BURS ON
The MIN and MAX
Parameters
Substitute MINimum or MAXimum in place of a parameter for some
commands. For example, consider the following command:
FREQuency {<frequency>|MINimum|MAXimum}
Instead of selecting a specific frequency, substitute MIN to set the
frequency to its minimum value or MAX to set the frequency to its
maximum value.