Responses To Queries; Parameters - Rohde & Schwarz R&S FSP Series Operating Manual

R&S FSP
5.6.4

Responses to Queries

A query is defined for each setting command unless explicitly specified otherwise. It
is formed by adding a question mark to the associated setting command. According
to SCPI, the responses to queries are partly subject to stricter rules than in standard
IEEE 488.2.
1. The requested parameter is transmitted without header.
Example: INPut:COUPling?
Response: DC
2. Maximum values, minimum values and all further quantities, which are requested
via a special text parameter are returned as numerical values.
Example: SENSe:FREQuency:STOP? MAX
Response: 3.5E9
3. Numerical values are output without a unit. Physical quantities are referred to the
base units or to the units set using the Unit command.
Example: SENSe:FREQuency:CENTer?
Response: 1E6 for 1 MHz
4. Truth values <Boolean values> are returned as 0 (for OFF) and 1 (for ON).
Example: SENSe:BANDwidth:AUTO?
Response: 1 for ON
5. Text (character data) is returned in a short form.
Example: SYSTem:COMMunicate:SERial:CONTrol:RTS?
Response (for standard): STAN
5.6.5

Parameters

Most commands require a parameter to be specified. The parameters must be sep-
arated 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 permissible range of values
are specified in the command description
Numerical values
Numerical values can be entered in any form, i.e. with sign, decimal point and expo-
nent. Values exceeding the resolution of the instrument are rounded up or down.
The mantissa 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 permissible. In the case of physical quantities, the unit can
be entered. Permissible unit prefixes are G (giga), MA (mega), MOHM and MHZ are
also permissible), K (kilo), M (milli), U (micro) and N (nano). It the unit is missing, the
base unit is used.
Example:
SENSe:FREQuency:STOP 1.5GHz = SENSe:FREQuency:STOP 1.5E9
Operating Manual 1164.4556.12 - 06
Remote Control – Basics
Structure and Syntax of the Device Messages
5.13