Pico Technology PicoSource PG900 Series Bedienungsanleitung

User's Guide

pg900ug.en r1

Pulse Generators

PicoSource®PG900 Series

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IPicoSource PG900 Series User's Guide

Contents

1 Introduction ................................................................................................................................ 1

1 Overview ............................................................................................................................................ 1

2 Minimum PC requirements ................................................................................................................. 2

3 Safety information .............................................................................................................................. 2

1 Symbols .................................................................................................................................. 3

2 Maximum input/output ranges ................................................................................................ 4

3 Grounding .............................................................................................................................. 4

4 External connections ............................................................................................................... 5

5 Environment ........................................................................................................................... 6

6 Care of the product ................................................................................................................. 6

4 Software licence conditions ................................................................................................................. 7

5 Trademarks ........................................................................................................................................ 8

6 Warranty ........................................................................................................................................... 8

2 Product information ................................................................................................................... 9

1 What do I get? ................................................................................................................................... 9

2 Connections ..................................................................................................................................... 10

3 How to use your pulse generator ............................................................................................. 12

1 Connection diagrams ........................................................................................................................ 12

1 TDR applications ................................................................................................................... 13

2 TDT applications ................................................................................................................... 14

3 TDT and crosstalk ................................................................................................................. 15

2 Free-running operation for SRD integrated pulse outputs .................................................................... 16

3 Free-running operation for TD outputs .............................................................................................. 18

4 External trigger operation ................................................................................................................. 19

5 Single trigger operation ..................................................................................................................... 20

4 PicoSource PG900 software ..................................................................................................... 21

1 Display area ...................................................................................................................................... 22

1 Intensified Zone .................................................................................................................... 23

2 Positive and negative pulse outputs .................................................................................................... 24

3 Tunnel diode pulse head outputs ....................................................................................................... 26

4 Tunnel diode pulse head controls ...................................................................................................... 28

5 Mode ............................................................................................................................................... 29

6 Timing .............................................................................................................................................. 30

7 External trigger ................................................................................................................................. 32

8 Trigger output .................................................................................................................................. 35

9 Display scaling .................................................................................................................................. 36

1 Vertical Scale ........................................................................................................................ 36

2 Horizontal Scale .................................................................................................................... 38

10 Undo/Redo .................................................................................................................................... 40

11 Main Menu ..................................................................................................................................... 40

ContentsII

5 Theory of operation ................................................................................................................. 41

1 PicoSource PG900 block diagram ...................................................................................................... 41

2 Hardware components for PicoSource PG900 models ........................................................................ 42

6 Specifications and characteristics .............................................................................................. 43

1 PG900 family specifications ............................................................................................................... 43

2 Integrated step recovery diode outputs .............................................................................................. 44

3 Drive output with tunnel diode pulse heads ........................................................................................ 45

4 Timing .............................................................................................................................................. 46

5 External trigger input ........................................................................................................................ 47

6 Trigger output .................................................................................................................................. 48

7 General ............................................................................................................................................ 49

7 Declaration of Conformity ........................................................................................................ 50

Index ........................................................................................................................................... 51

PicoSource PG900 Series User's Guide 1

1 Introduction

1.1 Overview

The PicoSource PG900 Series instruments are PC-based fast-edge pulse generators

that are fully compatible with USB 2.0 and 3.0 PCs.

The pulse generators are available in three differential output models and offer

extensive control over pulse parameters including amplitude, period, width and

deskew between output channels.

PicoSource PG911:

A two-channel pulse generator based on Step-Recovery Diode

(SRD) technology. It produces two pulses with opposite

polarity, up to 6 V amplitude with 60 ps rise time.

PicoSource PG912:

A two-channel pulse generator based on Tunnel Diode (TD)

technology. It is supplied with small remote tunnel diode

pulse heads that generate positive and negative 200 mV

pulses with 40 ps rise time.

PicoSource PG914:

A four-channel pulse generator based on both SRD and TD

technologies. It can produce two pulses with opposite polarity,

up to 6 V amplitude with 60 ps rise time, and two pulses with

opposite polarity, 200 mV amplitude and 40 ps rise time from

remote tunnel diode pulse heads.

PicoSource Pulse Generators are capable of producing pulses of either polarity with

very fast rise times. The generators will free-run or may be triggered from an external

source, with either positive or negative pulses, at rates of up to 1 MHz. The units are

designed to operate into 50 Ω lines.

The PicoSource instruments can be used as:

general-purpose pulse generators for the testing of semiconductors, components,

networks, electro-optical components etc.

fast rise/fall time step generators which can be used to check the dynamic

response of wide-band oscilloscopes and amplifiers

a stimulus for high-resolution TDR and TDT measurements

a step source for an ultra-wideband impulse forming network

For basic instructions on installing and using your pulse generator, please refer to How

to use your pulse generator or the Quick Start Guide supplied with your instrument.

Features

60 ps rise time at 6 V amplitude (integrated SRD pulse outputs)

40 ps rise time at 200 mV amplitude (tunnel diode pulse outputs)

1 Hz to 1 MHz repetition rate

200 ns to 4 µs pulse width

Continuous, external or manual trigger mode

Differential outputs with deskew

Low-jitter trigger input and output

Storage and carry case

USB 2.0- and 3.0- compatible

Introduction2

1.2 Minimum PC requirements

To ensure that the PicoSource PG900 pulse generator and software operate correctly,

you must use a computer with the system requirements and one of the operating

systems shown in the table below. The performance of the instrument will be improved

with a more powerful PC, and operation will greatly benefit from a multi-core

processor.

Processor

As required by the operating system

Memory

Free disk space

Software occupies about 20 MB

Operating system

Microsoft Windows XP (SP3), Windows Vista, Windows 7,

8, 8.1 (not Windows RT) and 10.

32-bit or 64-bit version.

Ports

USB 2.0 (also compatible with USB 3.0)

1.3 Safety information

To prevent possible electrical shock, fire, personal injury, or damage to the product,

carefully read this safety information before attempting to install or use the product.

In addition, follow all generally accepted safety practices and procedures for working

with and around electricity.

The product has been designed and tested in accordance with the European standard

publication EN 61010-1:2010, and left the factory in a safe condition.

The following safety descriptions are found throughout this guide:

A WARNING identifies conditions or practices that could result in injury or death.

A CAUTION identifies conditions or practices that could result in damage to the

product or equipment to which it is connected.

PicoSource PG900 Series User's Guide 3

1.3.1 Symbols

These safety and electrical symbols may appear on the product or in this guide.

Symbol

Description

Direct current

Alternating current

Earth (ground) terminal

This terminal can be used to make a measurement

ground connection. It is not a safety or protective

earth.

Chassis terminal

Possibility of electric shock

Caution

Appearance on the product indicates a need to read

these safety instructions.

Static awareness. Static discharge can damage parts.

Do not dispose of this product as unsorted municipal

waste.

WARNING

To prevent injury or death use the product only as instructed and use only

accessories supplied or recommended. Protection provided by the product

may be impaired if used in a manner not specified by the manufacturer.

Introduction4

1.3.2 Maximum input/output ranges

Observe all terminal ratings and warnings marked on the product.

The table below indicates the maximum voltage of the outputs and the overvoltage

protection range for the trigger input on each pulse generator. The overvoltage

protection ranges are the maximum voltages that can be applied without damaging

the instrument.

Connection port

Maximum voltage

(output or input)

Overvoltage protection

Integrated pulse outputs

±8 V unterminated

±10 V

Do not connect a source

Drive outputs

±5 V DC or AC pk

Do not connect a source

Tunnel diode pulse head

outputs

250 mV

0 V

Do not connect a source

Trigger input

±2 V DC or AC pk

Trigger output

+3 V DC or AC pk

+4 V / –2 V DC

Do not connect a source

WARNING

To prevent electric shock, do not connect an input voltage to the integrated

pulse outputs or the tunnel diode pulse heads.

CAUTION

Exceeding the overvoltage protection range on any connector can cause

permanent damage to the instrument and other connected equipment.

CAUTION

To prevent permanent damage, do not apply an input voltage to any of the

output channels of the pulse generator.

1.3.3 Grounding

WARNING

The instrument's ground connection through the USB cable is for functional

purposes only. The instrument does not have a protective safety ground.

WARNING

To prevent injury or death, never connect the ground of an input or output

(chassis) to any electrical power source. To prevent personal injury or death,

use a voltmeter to check that there is no significant AC or DC voltage

between the pulse generator's ground and the point to which you intend to

connect it.

CAUTION

Applying a voltage to the ground input is likely to cause permanent damage

to the instrument, the attached computer, and other equipment.

CAUTION

To prevent signal degradation caused by poor grounding, always use the

high-quality USB cable supplied with the instrument.

PicoSource PG900 Series User's Guide 5

1.3.4 External connections

WARNING

To prevent injury or death, only use the adaptor supplied with the product.

This is approved for the voltage and plug configuration in your country.

Power supply options and ratings

PicoSource

model

USB

connection

Ext DC power supply

Voltage

Current

Total power

PG900 Series

USB 2.0.

Compatible

with USB 3.0.

5 V

1.6 A pk

8 W

CAUTION

Take care to avoid mechanical stress or tight bend radii for all connected

leads, including all coaxial leads and connectors. Mishandling will cause

deformation of sidewalls, and will degrade performance.

Introduction6

1.3.5 Environment

WARNING

To prevent injury or death, do not use in wet or damp conditions, or near

explosive gas or vapor.

CAUTION

To prevent damage, always use and store your pulse generator in

appropriate environments.

Storage

Operating

Temperature

–20 °C to +50 °C

+5 °C to +35 °C

(+15 °C to +25 °C or TCAL ± 5

°C for quoted accuracy)

Humidity

Up to 95% RH

(non-condensing)

Up to 85% RH at +35 °C

(non-condensing)

Altitude

2000 m

Pollution degree

1.3.6 Care of the product

The product and accessories contain no user-serviceable parts. Repair, servicing and

calibration require specialized test equipment and must only be performed by Pico

Technology or an approved service provider. There may be a charge for these services

unless covered by the Pico two-year warranty.

WARNING

To prevent injury or death, do not use the product if it appears to be

damaged in any way, and stop use immediately if you are concerned by any

abnormal behavior.

CAUTION

To prevent damage to the device or connected equipment, do not tamper

with or disassemble the instrument, case parts, connectors, or accessories.

When cleaning the product, use a soft cloth and a solution of mild soap or

detergent in water, and do not allow liquids to enter the instrument's casing.

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