R&S NRP2, Руководство пользователя

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Remote Control Fundamentals
R&S
®
NRP2
177 User Manual 1173.9157.02 ─ 03
Processing of a program message is aborted if an error occurs. If only sensor 2 is con-
nected to a multichannel device, for example, the program message
SENS1:FREQ 50 GHZ;:SENS2:FREQ 50 GHZ
will be aborted after the first command and a second frequency setting will not be per-
formed.
5.7.4 Responses to Queries
Unless otherwise expressly specified, a query is defined for each command. The query
is created by appending a question mark to the associated command.
Some of the SCPI rules for query responses are stricter than those of the IEEE 488.2
standard:
●
The required value is sent without header.
Example:
SENSe:AVERage:TCONTrol?
Response:
MOV
●
Maximum and minimum values as well as all other quantities queried by a special
text parameter are returned as numeric values
Example:
SENSe:POWer:TSLot:COUNt? MAXimum
Response:
26
●
Numeric values are output without a unit. Physical quantities refer to the basic units
or to the units set with the UNIT command.
Example:
SENSe3:FREQuency?
Response:
1.000000E06
(for 1 MHz)
●
Boolean values are returned as 0 (for OFF) and 1 (for ON).
Example:
SYSTem:BEEPer:STATe?
Response:
1
●
Character data is returned in short form (
​
chapter 5.7.5, "Parameters" , on page 177).
Example:
UNIT2:POWer?
Response:
DBM
5.7.5 Parameters
Most commands require the specification of a parameter. Parameters must be separated
from the header by a white space. Parameters may be specified as numeric values,
Boolean parameters, character data, strings or block data. The type of parameter
required for the specific command as well as the permissible value range are described
together with the commands.
Structure and Syntax of device-dependent Messages