Network Operation and Remote Control
R&S
®
SMA100B
352User Manual 1178.3834.02 ─ 05
cation with the software on a command-by-command basis. For more convenience and
to enable automation by means of programs, user-defined sockets can be program-
med.
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. All R&S SMA100B use port number 5025 for
this purpose. The port is configured for communication on a command-to-command
basis and for remote control from a program.
12.2.2 USB Interface
Option: R&S SMAB-B86
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 Cass Specification) is a protocol that is built on
top of USB for communication with USB devices, like GPIB. It defines class code infor-
mation of the instrument, that identifies its functionality to load the respective device
driver. Using VISA library, it supports service request, triggers, and other specific oper-
ations, similar to GPIB.
12.2.2.1 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::0x01DD::100001
0x0AAD is the vendor ID for Rohde & Schwarz.
0x01DD is the product ID for the R&S SMA100B
100001 is the serial number of the particular instrument.
Remote Control Interfaces and Protocols
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