Network Operation and Remote Control
R&S
®
SMA100B
250
User Manual 1178.3834.02 ─ 03
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.
11.2.2 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.
11.2.2.1
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
.
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
11.2.3 GPIB Interface (IEC/IEEE Bus Interface)
Option: R&S
SMAB-B86
Remote Control Interfaces and Protocols
