R&S NRP2, Руководство пользователя

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Remote Control Fundamentals
R&S
®
NRP2
178 User Manual 1173.9157.02 ─ 03
Numeric values
Numeric values may be entered in any customary form, i.e. with sign, decimal point and
exponent. If the values exceed the resolution of the device, they will be rounded off.
Values between -9.9E37 and +9.9E37 can be entered. The exponent is denoted by "E"
or "e". The exponent alone must not be used.
Units
Physical quantities may be stated with the unit. Permissible prefixes for the unit are
G
(Giga),
MA
(Mega,
MHZ
is also allowed),
K
(kilo),
M
(milli),
U
(micro) and
N
(nano). If no unit
is specified, the basic unit will be used.
Example:
SENSe1:FREQuency 1.5 GHZ
is equivalent to
SENSe1:FREQuency 1.5E9
Some settings allow relative values to be stated in "One" and percent. According to SCPI,
these units are represented by the strings
O
or
DPCT
.
The unit DPCT designates the deviation of a measurand from 100%. A power ratio of
95% thus corresponds to -5
Δ
%.
Unit used in the R&S NRP2
SCPI notation
Watt W
dBm DBM
dBµV DBUV
dB DB
1
O
(as in One)
Δ
%
DPCT
Hertz
HZ
Second S
Special numeric values
The parameters
MINimum
,
MAXimum
, and
DEFault
are interpreted as special numeric
values. The numeric value is returned in response to a query.
Example:
Command:
SENSe2:POWer:APERture MAXimum
Query:
SENSe2:POWer:APERture?
Response:
1.000000E02
Structure and Syntax of device-dependent Messages