Remote Control Basics
R&S
®
SMC100A
189
Operating Manual 1411.4060.32 ─ 04
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DEF
DEFault denotes a preset value which has been stored in the EPROM. This value
conforms to the default setting, as it is called by the *RST command.
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UP/DOWN
UP, DOWN increases or reduces the numeric value by one step. The step width can
be specified via an allocated step command for each parameter which can be set via
UP, DOWN.
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INF/NINF
INFinity, Negative INFinity (NINF) represent the numeric values 9.9E37 or -9.9E37,
respectively. INF and NINF are only sent as instrument responses.
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NAN
Not A Number (NAN) represents the value 9.91E37. NAN is only sent as a instrument
response. This value is not defined. Possible causes are the division of zero by zero,
the subtraction of infinite from infinite and the representation of missing values.
Example:
Setting command:
SENSe:LIST:FREQ MAXimum
Query:
SENS:LIST:FREQ?, Response: 3.5E9
Queries for special numeric values
The numeric values associated to
MAXimum/MINimum/DEFault
can be queried by
adding the corresponding mnemonics to the command. They must be entered following
the quotation mark.
Example:
SENSe:LIST:FREQ? MAXimum
Returns the maximum numeric value as a result.
Boolean Parameters
Boolean parameters represent two states. The "ON" state (logically true) is represented
by "ON" or a numeric value 1. The "OFF" state (logically untrue) is represented by
"OFF" or the numeric value 0. The numeric values are provided as the response for a
query.
Example:
Setting command:
HCOPy:DEV:COL ON
Query:
HCOPy:DEV:COL?
Response:
1
Text parameters
Text parameters observe the syntactic rules for mnemonics, i.e. they can be entered
using a short or long form. Like any parameter, they have to be separated from the header
by a white space. In the case of a query, the short form of the text is provided.
SCPI Command Structure
