R&S NRQ6, Getting Started, Page: 52 / 61

Remote Control Interfaces and Protocols
R&S
®
NRQ6
52 Getting Started 1178.3705.02 ─ 07
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.
Setup
1. Connect the host interface of the R&S NRQ6 and the USB interface of the
computer, see Chapter 4.6.2, "Computer Using a USB Connection" ,
on page 25.
2. Make sure that the R&S NRQ6 is powered by PoE+. For details, see
"R&S NRQ6 requires PoE+" on page 33.
USBTMC protocol
USBTMC is a protocol that is built on top of USB for communication with USB
devices from the test
& measurement category. It defines a dedicated class code
that identifies a device's functionality. R&S NRQ6 also uses this class code to
identify itself as a member of the test & measurement class. Using a VISA library,
such devices support service request, trigger and other operations that are com-
monly found in GPIB devices.
USB resource string
The VISA resource string for USBTMC device communication represents an
addressing scheme that is used to establish a communication session with the
sensor. It is based on the sensor address and some instrument- and vendor-spe-
cific information. The syntax of the used USB resource string is:
USB::<vendor ID>::<product ID>::<serial number>[::INSTR]
●
<vendor ID> is the vendor ID for Rohde & Schwarz.
●
<product ID> is the product ID for the R&S NRQ6.
●
<serial number> is the individual serial number of the , printed on the casing.
Example:
USB::0x0AAD::0x015B::100001
0x0AAD is the vendor ID for Rohde & Schwarz.
0x015B is the product ID for the R&S
NRQ6.
100001 is the serial number of the particular R&S NRQ6.
USB Interface