Agilent Technologies N5980A Instrucciones de funcionamiento

Agilent

3.125 Gb/s Serial BERT

N5980A

Programming Guide

2 N5980A Programming Guide

Notices

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Edition

Revision 1.2, April 2007

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cturing_BERT

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Safety Notices

A CAUTION notice denotes a hazard.

It calls attention to an operating

procedure, practice, or the like that, if

not correctly performed or adhered to,

could result in damage to the product

or loss of important data. Do not

proceed beyond a CAUTION notice

until the indicated conditions are fully

understood and met.

A WARNING notice denotes a

hazard. It calls attention to an

operating procedure, practice, or the

like that, if not correctly performed

or adhered to, could result in

personal injury or death. Do not

proceed beyond a WARNING notice

until the indicated conditions are

fully understood and met.

CAUTION

WARNING

Safety Summary

General Safety Precautions

The following general safety

precautions must be observed

during all phases of operation of

this instrument. Failure to

comply with these precautions

or with specific warnings

elsewhere in this manual

violates safety standards of

design, manufacture, and

intended use of the instrument.

Agilent Technologies Inc.

assumes no liability for the

customer's failure to comply

with these requirements.

Before operation, review the

instrument and manual for

safety markings and

instructions. You must follow

these to ensure safe operation

and to maintain the instrument

in safe condition.

General

This product is a Safety Class 1

instrument (provided with a

protective earth terminal). The

protective features of this

product may be impaired if it is

used in a manner not specified

in the operation instructions.

All Light Emitting Diodes

(LEDs) used in this product are

Class 1 LEDs as per IEC 60825-

Environment Conditions

This instrument is intended for

indoor use in an installation

category II, pollution degree 2

environment. It is designed to

operate at a maximum relative

humidity of 95% and at altitudes

of up to 2000 meters.

Refer to the specifications tables

for the ac mains voltage

requirements and ambient

operating temperature range.

Before Applying Power

Verify that all safety precautions

are taken. The power cable inlet

of the instrument serves as a

device to disconnect from the

mains in case of hazard. The

instrument must be positioned

so that the operator can easily

access the power cable inlet.

When the instrument is rack

mounted the rack must be

provided with an easily

accessible mains switch.

Ground the Instrument

To minimize shock hazard, the

instrument chassis and cover

must be connected to an

electrical protective earth

ground. The instrument must be

connected to the ac power mains

through a grounded power cable,

with the ground wire firmly

connected to an electrical

ground (safety ground) at the

power outlet. Any interruption

of the protective (grounding)

conductor or disconnection of

the protective earth terminal will

cause a potential shock hazard

that could result in personal

injury.

Do Not Operate in an

Explosive Atmosphere

Do not operate the instrument in

the presence of flammable gases

or fumes.

Do Not Remove the

Instrument Cover

Operating personnel must not

remove instrument covers.

Component replacement and

internal adjustments must be

made only by qualified

personnel.

Instruments that appear

damaged or defective should be

made inoperative and secured

against unintended operation

until they can be repaired by

qualified service personnel.

4 N5980A Programming Guide

Safety Symbols on

Instruments

Indicates warning or caution. If

you see this symbol on a product,

you must refer to the manuals for

specific Warning or Caution

information to avoid personal

injury or damage to the product.

Safety requirements for electrical

equipment for measurement,

control, and laboratory use

CAN/CSA C22.2 No. 1010.1

(1993) UL 3101, 3111 (First

Editions). This equipment has

also been evaluated to IEC 61010

edition 1 including amendments

1 and 2.

Notice for European Community:

This product complies with the

relevant European legal

Directives: EMC Directive

89/336/EEC and Low Voltage

Directive 73/23/EEC.

Conformity Mark of the

Australian ACA for EMC

compliance.

General Recycling Mark for

plastic parts used in the product.

Environmental Information

Introduction

N5980A Programming Guide 5

Contents

Contents 5

1Introduction 6

2Programming Basics 8

3Setting Up The Environment 10

4A Typical Remote Program 13

5SCPI Command Reference 18

6Frequently Asked Questions (FAQ) 21

6 N5980A Programming Guide

1 Introduction

Introduction This document provides the information you need for remote programming

the N5980A Serial BERT.

Communication

Overview

To communicate with the N5980A Serial BERT from a remote computer, you

have to connect the USB port on the rear of the instrument to a USB port of

your PC.

Figure 1: N5980A Serial BERT setup diagram

Note: the N5980A Serial BERT does not have a LAN or a GPIB interface.

Controller PC

USB

Introduction

N5980A Programming Guide 7

Agilent I/O

Libraries

To communicate with the N5980A Serial BERT, you do not need the Agilent

I/O Libraries! The communication with the instrument is not done using the

VISA libraries.

The remote access can only be done by directly using Windows Sockets.

The N5980A Serial BERT is not visible with the Agilent Connection Expert,

i.e. it does not provide USB API programming through or with the Agilent IO

Libraries!

Because the N5980A Serial BERT does not use the Agilent IO Library

infrastructure you cannot use e.g. the VISA Assistant or the Interactive IO

program to send SCPI commands to the instrument.

Please refer to the Sample Code in the enclosed examples to control the

N5980A from within a remote program.

8 N5980A Programming Guide

2 Programming Basics

SCPI Compatibility The SCPI commands represent the instrument’s advanced analysis, and

pattern generation features that can be controlled from within the remote

programs.

The N5980A Serial BERT is not is fully SCPI1997 standard compliant.

The remote programming language is close to SCPI. The instrument does

not have full featured SCPI parser.

The missing standard SCPI features are:

•Status handling/registers

No commands are available to query or set the status of the

instrument.

•Support of short and long form of SCPI commands

Commands may only sent in the exact format given below.

Example: :SOUR1:PATT PRBS7

You may not use: :SOURce1:PATTern PRBS7

•There are no default suffixes

You always have to add the suffix to the command

Example: :SOUR1:PATT?

You may not omit the “1” in “SOUR1”.

•Multiple SCPI commands in one line

You always have to specify the full command.

SCPI standard allows: :SOUR1:PATT PRBS7;EADD ONCE

N5980A needs: :SOUR1:PATT PRBS7; :SOUR1:PATT:EADD ONCE

The commands must always be complete, even for the second

parameter that belongs to the same root node inside a transaction.

•Only a few of the standard SCPI commands are available,

e.g. *OPC is missing.

Please refer to the Sample Code in the enclosed examples to control the

N5980A from within a remote program.

Programming Basics

N5980A Programming Guide 9

Remote Access

Using Windows

Sockets

The N5980A Serial BERT does not use the Agilent IO Library infrastructure.

You therefore cannot send SCPI commands to the instrument using that

infrastructure (e.g. with the VISA Assistant or the Interactive IO program).

However, you can send the commands “directly”. You have to send them

directly to the IP address (and a certain port number) of the PC that is

controlling the N5980A Serial BERT.

The software controlling the N5980A Serial BERT will receive the commands

and forward them to the USB interface the Serial BERT is connected to.

In other words the N5980A Serial BERT software (running on the PC that is

controlling the instrument) acts as “gateway”: it receives the commands

over the network and forwards them to the Serial BERT via the USB

interface.

As a consequence the remote programming software needs to take the SCPI

commands and send them to the IP address (and a certain port number) of

the PC that is controlling the N5980A Serial BERT.

The remote programming software will do this using Windows Sockets.

The details will be shown in the examples below and in the Sample Code in

the enclosed examples.

10 N5980A Programming Guide

3 Setting Up The Environment

Introduction This section describes step by step the setup required to programmatically

access the N5980A Serial BERT.

Controller PC

Requirements

The N5980A Serial BERT software runs on a controller PC which is

connected to the instrument using an USB link.

The PC has to meet the following requirements:

•Pentium III with > 450 MHz

•Minimum RAM: 256 MB

•20 MB of free disk space

•Operating System:

oWindows 2000 SP4

oWindows XP SP2

•Microsoft .NET 2.0 Framework

(If the .NET 2.0 Framework is not already installed, download it from

the Microsoft Download Center or alternatively execute the program

dotnetfx.exe that is included on the installation CD).

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