Rohde & Schwarz R&S SMW200A - GPIB Interface (IEC;IEEE Bus Interface); USB Interface

Network Operation and Remote Control
R&S
®
SMW200A
779User Manual 1175.6632.02 ─ 30
Socket connections are established on a specially defined port. The socket address is
a combination of the IP address or the host name of the instrument and the number of
the port configured for remote-control. Typically, the products of Rohde & Schwarz use
port number 5025 for this purpose. The port is configured for communication on a com-
mand-to-command basis and for remote control from a program.
13.2.2 USB Interface
For remote control via the USB connection, the PC and the instrument must be con-
nected via the USB type B interface. A USB connection requires the VISA library to be
installed. VISA detects and configures the R&S instrument automatically when the
USB connection is established. You do not have to install a separate driver.
USBTMC (USB Test & Measurement Class Specification) is a protocol that is built on
top of USB for communication with USB devices. It defines class code information of
the instrument, that identifies its functionality to load the respective device driver. Using
VISA library, it supports service request, triggers, and other specific operations.
13.2.2.1 USB Resource String
The resource string represents an addressing scheme that is used to establish a com-
munication session with the instrument. It is based on the instrument address and
some instrument- and vendor-specific information.
The USB resource string syntax is as follows:
USB
= denotes the used interface
<vendor ID> = is the manufacturer ID for Rohde & Schwarz
<product ID> = is the product identification of the instrument
<serial number> = is the individual serial number on the rear of the instrument
[::INSTR] = indicates the instrument resource class (optional)
To set the USB resource string, see Remote Access Settings.
Example:
USB::0x0AAD::0x0092::100001
0x0AAD is the vendor ID for Rohde & Schwarz.
0x0092 is the product ID for the R&S SMW
100001 is the serial number of the particular instrument.
13.2.3 GPIB Interface (IEC/IEEE Bus Interface)
To be able to control the instrument via the GPIB bus, the instrument and the controller
must be linked by a GPIB bus cable. A GPIB bus card, the card drivers and the pro-
gram libraries for the programming language used must be provided in the controller.
Remote Control Interfaces and Protocols