Manual

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Model 835-M Programmer’s

Manual

V1.1 2011

For instance,

if the instrument

has

the

IP address 192.168.1.50,

TCPIP::192.168.1.50::inst0::INSTR

is

the

valid

resource

name.

Specification

of inst0 in the

resource

name

is

optional. In this example, also

TCPIP::192.168.1.50::INSTR

is

therefore a valid

resource

name.

TCPIP designates

the network protocol

used

and

INSTR indicates

that the

VXI-11 protocol is used.

If

several

instruments

are

c

onnecte

d

to the network,

each

instrument

has

its own

IP address

and

associated resource

name. The

controller

identifies these

instruments

by

means

of the

resource

name.

Using

Sockets

LAN

Sockets LAN is

a method

used

to

communicate

with the

signal

generator over the

LAN

interface using the

Transmission Control

Protocol/Internet

Protocol (TCP/IP).

A

socket is

a fundamental technology

used

for

computer

networking and allows

applications

to

communicate using standard

mechanisms built into network

hardware and operating

systems.

The method

accesses

a port on the signal generator from which

bidirectional

communication

with a network computer

can

be

e

s

tablished.

Sockets LAN can

be

described as

an internet

address

that

combines

Internet

Protocol (IP)

with a device port number and

represents

a

single connection

between two

pieces

of software. The

socket can

be

accessed using code libraries packaged

with the

computer

operating

system.

Two

common versions

of

socket libraries

are the

Berkeley

Soc

ke

t

s

Library

for UNIX

systems

and

Winsock

for Microsoft

operating systems.

Your

signal

generator

implements

a

socket Applications Programming

Interface

(API)

that is compatible with

Berkeley socket

for UNIX

systems,

and

Winsock

for Microsoft

systems.

The signal generator

is also

compatible

with other

standard sockets APIs.

The

signal

generator

can

be controlled

using

predefined

SCPI functions once

the

socket

c

onnection

is established

in your program. Socket

connection is

available on port 18.

Using and Configuring

VXI-11

(VISA)

The

signal

generator

supports

the

LAN

interface protocol

described

in the VXI-

11

standard.

VXI-

11

is

an instrument control protocol

based

on Open Network Computing/Remote

Procedure Call

(ONC/

R

P

C

)

interfaces

running over

T

C

P/IP.

A range of

standard

software

such as NI-VISA

or Agilent IO Config

is

available to setup

the

computer/signal

generator interface for the VXI-

11

protocol. Please

refer to the

applicable

software

user

manual and

documentation for information on running the program and

configuring

the VXI-11 interface. The program

is used

to

configure

the

LAN

client.

Once

the

computer is

configured for a LAN client, you

can use

the VXI-

11

protocol

and the

VISA

library to

send SCPI commands

to the signal generator over the

LAN

interface.