Vxi-11 Protocol; Socket Communication - R&S SGU100A Getting Started

Sgma upconverter

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R&S

SGU100A

● Usable for IPv6 or IPv4 networks

Using VXI-11, each operation is blocked until a VXI-11 device handshake

returns. However, using HiSLIP, data is sent to the device using the "fire

and forget" method with immediate return. Thus, a successful return of a

VISA operation such as viWrite() does not guarantee that the instru-

ment has finished or started the requested command, but is delivered to the

TCP/IP buffers.

For more information see also the application note:

1MA208: Fast Remote Instrument Control with HiSLIP

VXI-11 Protocol

The VXI-11 standard is based on the ONC RPC (Open Network Computing

Remote Procedure Call) protocol which in turn relies on TCP/IP as the network/

transport layer. The TCP/IP network protocol and the associated network services

are preconfigured. TCP/IP ensures connection-oriented communication, where

the order of the exchanged messages is adhered to and interrupted links are

identified. With this protocol, messages cannot be lost.

An alternative way for remote control of the software is to establish a simple net-

work communication using sockets. The socket communication, also referred to

as "Raw Ethernet communication", does not require a VISA installation on the

remote controller side.

The simplest way to establish socket communication is to use the built-in telnet

program. The telnet program is part of every operating system and supports com-

munication with the software on a command-by-command basis.

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 instruments 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 running on a

connected PC.

Getting Started 1418.2070.02 ─ 08

Network and Remote Control Operation

Instrument Control

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