R&S 1332.4500K22, Руководство пользователя

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Remote control
R&S
®
ZNA
856 User Manual 1178.6462.02 ─ 20
Example:
TRIGger:SOURce?
Response:
IMM
6.2.3 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". Permissible
parameters are numerical values, Boolean parameters, text, character strings and
block data. The type of parameter required for the respective command and the per-
missible range of values are specified in the command description.
6.2.3.1 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 values must be in the value range –
9.9E37 to 9.9E37. The exponent is introduced by an E or e. Entry of the exponent
alone is not allowed. In the case of physical quantities, the unit can be entered. Per-
missible unit prefixes are G (giga), MA (mega), MOHM and MHZ are also permissible),
K (kilo), M (milli), U (micro) and N (nano). If the unit is missing, the default unit is used.
Example:
SOUR:RFG:FREQ 1.5GHz
is equivalent to:
SOUR:RFG:FREQ 1.5E9
Special numeric values
The texts
MINimum
,
MAXimum
,
DEFault
,
UP
and
DOWN
are interpreted as special
numeric values. A query returns the associated numerical value.
Example:
Setting command:
SENSe:FREQuency:STARt MINimum
The query
SENSe:FREQuency:STARt?
returns
300000
(the exact value depends on
the analyzer model).
The following special values can be used:
●
MIN/MAX MINimum
and
MAXimum
denote the minimum and maximum value of a
range of numeric values.
●
DEF DEFault
denotes the preset value. This value is set by the
*RST
command.
●
UP/DOWN
UP
,
DOWN
increases or reduces the numeric value by one step. The
step width is reported in the detailed command description.
●
INF/NINF
Negative
INFinity
(
NINF
) represent the numerical values –9.9E37 or
+9.9E37, respectively.
INF
and
NINF
are only sent as device responses.
●
NAN
Not a Number (
NAN
) represents the value 9.91E37.
NAN
is only sent as device
response. This value is not defined. Possible causes are division by zero, subtrac-
tion or addition of infinite and the representation of missing values.
Messages