Remote Control Basics
R&S
®
NRPxxS(N)
151User Manual 1177.5079.02 ─ 10
11 Remote Control Basics
● Remote Control Interfaces and Protocols............................................................. 151
● SCPI Command Structure.....................................................................................155
● Status Reporting System...................................................................................... 162
11.1 Remote Control Interfaces and Protocols
For remote control, communication between the R&S NRPxxS(N) power sensors and
the controlling host is established based on various interfaces and protocols.
Depending on the sensor type, the power sensors support different interfaces for
remote control.
●
R&S NRPxxS USB power sensors are always accessed using USB.
●
R&S NRPxxSN LAN power sensors can be accessed using USB or Ethernet.
Table 11-1 describes the protocols that are supported for each interface.
Table 11-1: Remote control interfaces and protocols
Interface Supported by
Protocols, VISA
*)
address string and Library
USB All
power
sensors
●
USBTMC
USB::<vendor ID>::<product ID>::<serial number>[::INSTR]
VISA
●
NRP legacy protocol
Ethernet R&S NRP LAN
power sensors
●
VXI-11
TCPIP::host address[::LAN device name][::INSTR]
VISA
●
HiSLIP High-Speed LAN Instrument Protocol (IVI-6.1)
TCPIP::host address::hislip0[::INSTR]
VISA
●
Socket communication (LAN Ethernet)
TCPIP::host address[::LAN device name]::<port>::SOCKET
(
*
) VISA is a standardized software interface library providing input and output functions to communicate with instruments. A VISA
installation on the controller is a prerequisite for remote control over USBTMC and LAN (when using VXI-11 or HiSLIP protocol)
interfaces.
11.1.1 USB Interface
For remote control using USB connection, the computer and the power sensors must
be connected via the USB interface. A USB connection requires the VISA library to be
installed. VISA detects and configures the R&S power sensors automatically when the
USB connection is established. Apart from the USBTMC driver (which comes with the
installation of the R&S NRP Toolkit), you do not have to install a separate driver.
USB Test & Measurement Class Specification (USBTMC) is a protocol that is built on
top of USB for communication with USB devices. It defines class code information of
the sensor, that identifies its functionality to load the respective device driver. Using
VISA library, it supports service request, triggers and other operations that are com-
monly found in GPIB devices.
Remote Control Interfaces and Protocols
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