BNC 835 Programmer Manual - Manual (Page 9)

Berkeley Nucleonics Corporation 2955 Kerner Blvd., San Rafael, CA 94901
Phone: 415-453-9955, Fax: 415-453-9956, Email: [email protected], Web: www.berkeleynucleonics.com
2.1.4 Using Telnet LAN (Port 18)
Telnet provides a means of communicating with the signal generator over the LAN. The Telnet client,
run on a LAN connected computer, will create a login session on the signal generator. A connection,
established between computer and signal generator, generates a user interface display screen with
“>” prompts on the command line.
Using the Telnet protocol to send commands to the signal generator is similar to communicating with
the signal generator over LAN. You establish a connection with the signal generator and then send or
receive information using predefined commands. Communication is interactive: one command at a
time. The telnet service is available on port 18.
Once a telnet session to the device is established, the echo can be enabled by typing
SYST:COMM:SOCK:ECHO ON
Following this command a prompt “>>” should become visible.
2.2 USB (USBTMC)
All instruments support the following USB interface protocols:
1) USBTMC class device via VISA: USBTMC stands for USB Test & Measurement Class.
USBTMC is a protocol built on top of USB that allows GPIB-like communication with USB
devices. From the user's point of view, the USB device behaves just like a GPIB device.
USBTMC allows instrument manufacturers to upgrade the physical layer from GPIB to USB
while maintaining software compatibility with existing software such as instrument drivers and
any application that uses VISA. This is also what the VXI-11 protocol provides for TCP/IP.
2) USBTMC with IVI drivers: the application programming interface (API) provided with the
instrument supports general programming using the USB interface under Windows operating
system using the IVI drivers.
2.2.1 USB-TMC Interface Connection and Setup using VISA
USBTMC stands for USB Test & Measurement Class. USBTMC is a protocol built on top of USB that
allows GPIB-like communication with USB devices. From the user's point of view, the USB device
behaves just like a GPIB device. For example, you can use VISA Write to send the *IDN? query and
use VISA Read to get the response. The USBTMC protocol supports service request, triggers and
other GPIB specific operations.
USBTMC upgrades the physical layer from GPIB to USB while maintaining software compatibility with
existing software such as instrument drivers and any application that uses VISA. This is also what the
VXI-11 protocol provides for TCP/IP.