Usb Tmc - R&S NGE-K101 User Manual

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R&S NGE100B
6.1.1.2
User Manual 5601.1343.02 ─ 02

USB TMC

The USB Test & Measurement class (USB-TMC) is a protocol that allows GPIB-like
communication via USB interfaces and is a separate instrument class of the USB spec-
ification. The USB-TMC protocol supports service queries, triggers, and other GPIB-
specific instructions.
VISA drivers are installed and that it can be used directly in the corresponding environ-
ments. The driver is included in the NI-VISA package and can be downloaded at
www.ni.com/downloads/ni-drivers/.
A major benefit of the USB TMC class is that by sampling specific registers the control-
ling software can determine if commands have been terminated and if they have been
processed correctly. With USB-TCP, communication with instrument requires analysis
and polling mechanisms within the controlling software which may significantly strain
the interface of the measurement instruments. The TMC status registers solve this
problem with the USB TMC in the same manner as in the case with the GPIB interface
for the hardware via the corresponding control lines.
HMExplorer
The window application supports the communication via LAN, USB VCP and WLAN
only.
For more information of the VISA driver installation, see the installation guide of the
VISA driver file.
Once the driver is installed, the "USB Test and Measurement Device (IVI)" is displayed
in the Windows Device Manager dialog, see
Allice Messtechnik GmbH
Remote Control
Interfaces and Protocols
Figure 6-1.
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