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SCPI Command Structure
R&S
®
RTC1000
340User Manual 1335.7352.02 ─ 04
A.3 SCPI Parameters
Many commands are supplemented by a parameter or a list of parameters. The
parameters must be separated from the header by a "white space" (ASCII code 0 to 9,
11 to 32 decimal, e.g. blank).
The parameters required for each command and the allowed range of values are
specified in the command description.
Allowed parameters are:
● Numeric Values..................................................................................................... 340
●
Special Numeric Values........................................................................................ 341
●
Boolean Parameters............................................................................................. 341
●
Text Parameters....................................................................................................341
●
Character Strings.................................................................................................. 342
●
Block Data.............................................................................................................342
A.3.1 Numeric Values
Numeric values can be entered in any form, i.e. with sign, decimal point and exponent.
Values exceeding the resolution of the instrument are rounded up or down. The man-
tissa may comprise up to 255 characters, the exponent must lie inside the value range
-32000 to 32000. The exponent is introduced by an "E" or "e". Entry of the exponent
alone is not allowed.
Example:
SENS:FREQ:STOP 1500000 = SENS:FREQ:STOP 1.5E6
Units
For physical quantities, the unit can be entered. If the unit is missing, the basic unit is
used. Allowed unit prefixes are:
●
G (giga)
●
MA (mega), MOHM, MHZ
●
K (kilo)
●
M (milli)
●
U (micro)
●
N (nano)
Example:
SENSe:FREQ:STOP 1.5GHz = SENSe:FREQ:STOP 1.5E9
Some settings allow relative values to be stated in percent. According to SCPI, this unit
is represented by the PCT string.
SCPI Parameters
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