Agilent Technologies E2625A, 100 User Manual

User’s Guide

Publication number E2625-97003 March 2002

For Safety information and Regulatory information, see the pages at the end of this manual.

Infiniium Option 100 and E2625A Telecommunications Mask Template Kit

In This Book

This Telecommunications Mask Template Kit User’s Guide contains the following information:

Introduction to Option 100 and E2625A Telecommunications Mask Template Kit

Chapter 1 introduces specific product information about the Mask Template Kit. It also discusses the recommended oscilloscope configuration, and shows an overview of the Mask Test Setup dialog box.

Getting Started and Using Masks

C h a p t e r 2 d e s c r i b e s M a s k Te s t i n g a n d s h o w s y o u wa ys t o u s e t h e st a n d a r d m a s k s to verify compliance of your instrument waveforms.

Standard Masks

Chapter 3 lists file names for the standard masks in the Telecommunications Mask Template Kit, along with line impedances and bit rates. The templates for each standard mask are also shown.

Contents

1 Introduction to Option 100 and E2625A Telecommunications

Mask Template Kit

Adding Option 100 to an existing Infiniium Oscilloscope 1-2 Supplied items 1-3 Recommended accessories 1-3 What not to do 1-3 Oscilloscope models 1-4 To access the Mask Test Setup dialog box 1-5 Overview of the Mask Test Setup dialog box 1-6

2 Getting Started and Using Masks

Introduction to Mask Testing 2-2 Make a copy of the Mask Test disk 2-3 To install the Standard Masks 2-4 To calibrate the oscilloscope 2-5 To choose a proper probe for Mask Testing 2-6 To get your waveform on the oscilloscope display 2-7 To enable the Mask Test 2-8 To load a Mask 2-9 To align a Mask to the waveform 2-10 To start and stop the Mask Test 2-11 To understand the Mask Test tab description area 2-12 To run the Mask Test conditionally 2-13 To stop the Mask Test on the first failure 2-14

3Standard Masks

ITU G.703 International Standard Masks 3-4 ANSI T1.102 North American Standard Masks 3-11 FCC Part 68.308 Options A, B, and C Masks 3-17 Pre-Compliance SONET Masks 3-19 IEEE 802.3 Masks 3-21

Contents-1

Contents-2

Introduction to Option 100 and E2625A Telecommunications Mask Template Kit

The Infiniium Oscilloscopes Option 100 Telecommunications Mask Template Kit includes the materials necessary for you to verify that your instrument waveforms comply with industry standards. Option 100 provides a quick method for you to certify waveform integrity during early development and later during manufacturing tests.

This manual helps you use the standard masks supplied with Option 100. It shows you how to load standard waveform masks into Infiniium Oscilloscopes and use them to test the compliance of your waveforms. All of the standard masks supplied are shown in Chapter 3.

Adding Option 100 to an existing Infiniium Oscilloscope

The Op tion 100 Telecommunications Mask Template Kit is orderable as E2625A for customers who already have an Infiniium Oscilloscope.

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Introduction to Option 100 and E2625A Telecommunications Mask Template Kit

Supplied items

The Option 100 Telecommunications Mask Template Kit contains the following items:

Mask Template Kit Item

Floppy disk Mask template library floppy disk E2626A Adapter 100/110/120

Adapter cable Bantam (m) to Siemens (f) adapter cable E2623A Adapter 75

Adapter cable Dual-bantam (f) to RJ48C (m) adapter cable E2624A Adapter/coupler RJ48C (f) to RJ48C (f) E2627A Adapter Bantam (m) to BNC (f); for system verification of

Adapter BNC (m) to BNC (f) 50-to-75 ohm adapter; for

Cable BNC (m) to BNC (m) cable; 30 cm long 8120-1838 Storage case Hard-shell case for storage of all kit accessories E2625-45501

Description Separately Orderable

Ω differential impedance adapter

with bantam (f) connector, bantam (m) to Siemens (f) adapter cable

Ω single-ended impedance adapter with

BNC (f) connector

E2621A adapter and Infiniium oscilloscope

system verification of E2622A adapter and Infiniium oscilloscope

Agilent Part Number

E2621A

E2622A

E2628A

E2629A

Recommended accessories

Other Agilent accessories recommended for use in mask testing include:

Agilent Part Number

E2630A Patch cable Bantam (m) to bantam (m) patch cable E2632A Patch cable Siemens (m) to Siemens (m) patch cable

Accessory Item Description

What not to do

You should not use the Mask Test master disk for daily use. Instead, you should use a copy of the master disk, as described in Chapter 2.

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Introduction to Option 100 and E2625A Telecommunications Mask Template Kit

Oscilloscope models

You can use the Telecommunications Mask Template Kit with these Infiniium Oscilloscopes:

Agilent Model Channels Bandwidth Sample Rate Memory Depth

54810 54815 54820 54825 54835

54845

54846

54830

54831

54832

2 500 MHz 1 GSa/s 32k 4 500 MHz 1 GSa/s 32k 2 500 MHz 2 GSa/s 32k 4 500 MHz 2 GSa/s 32k 4 1.5 GHz 2 GSa/s — 4 ch

4 GSa/s — 2 ch

4 1.5 GHz 4 GSa/s — 4 ch

8 GSa/s — 2 ch

4 2.25 GHz 4 GSa/s — 4 ch

8 GSa/s — 2 ch

2 600 MHz 2 GSa/s — 4 ch

4 GSa/s — 2 ch

4 600 MHz 2 GSa/s — 4 ch

4 GSa/s — 2 ch

4 1 GHz 2 GSa/s — 4 ch

4 GSa/s — 2 ch

32k — 4 ch 64k — 2 ch

2M — 4 ch 4M — 2 ch

Requires system software version A.03.00 or later.

Requires system software version A.02.00 or later.

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Introduction to Option 100 and E2625A Telecommunications Mask Template Kit

To access the Mask Test Setup dialog box

Select Analyze, then Mask Test... from the oscilloscope main menu, as shown here, to access the Mask Test Setup dialog box:

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Introduction to Option 100 and E2625A Telecommunications Mask Template Kit

Overview of the Mask Test Setup dialog box

You will use the Mask Test Setup dialog box shown here to load and use masks with the Infiniium Oscilloscope. Standard masks are shown in Chapter 3. How to load and use a mask is described in Chapter 2.

Mask Test Setup Dialog Box

Checkmark to enable the Mask Test.

Click to load a Mask.

A Mask Test tab will appear when the Mask Test is enabled.

Check options to invert a mask, use the file setup when aligning a m ask, or enable averaging to reduce noise.

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Click to start and stop the Mask Test.

Click to align or clear a Mask.

Conditionally run the Mask Test and stop on the first failure.

See the Infiniium help system to use Scaling and Automask.

Getting Started and Using Masks

Telecommunications (telecom) and data communications (datacom) industries have established standards for equipment manufacturers. One of these standards defines the electrical parameters for waveforms. By applying these standards, both telecom and datacom equipment manufacturers can ensure that their equipment will operate properly together by first certifying waveform integrity.

To verify waveform integrity during the equipment manufacturing phase, Infiniium Oscilloscopes have a feature called Mask Testing. Within seconds, you know whether your equipment’s waveform complies with the industry standard.

Introduction to Mask Testing

What is a Mask?

A mask is a template that you load into the oscilloscope used during mask testing. The mask shows the acceptable electrical parameters of a waveform by defining regions of the oscilloscope display where the waveform must not intersect. If the waveform crosses the boundary of a region of the mask, it fails the mask test.

The types of masks that you can use to test waveforms include:

• Industry standard masks

Industry standard masks are included in this Mask Template Kit.

• Automatically generated masks

• User-defined masks

When to use Mask Testing

You should use mask testing whenever your waveform must conform to an industry standard. You can do mask testing during manufacturing to ensure that your design meets the requirements of the telecom or datacom industries.

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Getting Started and Using Masks

Make a copy of the Mask Test disk

How Infiniium does Mask Testing

When you start the mask test, Infiniium creates a database that has unique locations for every pixel in the waveform viewing area. Each location in the database has a 21-bit counter for a maximum count of 2,097,151.

Each time a data point from a channel memory illuminates a pixel in the wav efor m viewi ng a r ea, th e count er for that pi xel i s incre ment e d. Du r ing ma sk testing, any data point that illuminates a pixel in the mask violation region causes a mask test failure.

The oscilloscope’s database continues to build until the oscilloscope stops acquiring data or until mask testing is deactivated.

The oscilloscope’s database is also used for histogram analysis and color grade persistence. Refer to the Infiniium help system for detailed information about these other waveform analysis features.

How to do Mask Testing

The remaining topics in this chapter show you how to do mask testing. Chapter 3 shows the standard masks supplied in the Mask Template Kit.

Make a copy of the Mask Test disk

A disk containing the stand ard masks is shipped with Infiniium Option 100 and E2625A. Before you install the Mask Test templates, you should make a copy of the Mask Test master disk and use the copy of the Mask Test disk for the installation.

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Getting Started and Using Masks

To install the Standard Masks

Use the copy of the Mask Test disk to install standard masks onto the Infiniium hard drive. The Mask Test disk contains many of the available standard masks that you may need to use during mask testing.

Insert the copy of the Mask Test disk in the floppy drive.

2 From the oscilloscope main menu, select Analyze, then Mask Test. 3 In the Mask Test Setup dialog box, select the Enable Mask Test control. 4 In the Mask Test Setup dialog box, click the Load Mask... button.

The Load Mask dialog box will resemble:

This selects the disk where the masks are installed.

This selects the directory where the masks are installed.

Click the Install Masks from A: button.

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Getting Started and Using Masks

To calibrate the oscilloscope

Your Infiniium should be at optimum performance when performing mask testing. If your Infiniium has not been calibrated in the last year or if the Calibration ∆Te m p i s gr e a t e r th a n ± 5 °C , yo u sh o u l d r e c a l i b r a te t h e os c i l loscope before performing a mask test. You can find the Calibration ∆Temp in the Calibration dialog box by clicking on the Utilities menu and selecting Calibration.

Make sure Infiniium has warmed up for at least 30 minutes.

2 From the oscilloscope main menu click Utilities, then Calibration. 3 Make sure that the Cal Memory Protect check box is unchecked.

Cal Memory Protect This option protects the oscilloscope’s calibration factors from

Details When checked, this option displays a list of anything that has failed

4 Click Start.

Infiniium will display additional instructions and guide you through the stepby-step calibration procedure.

accidentally being changed.

during the cal ibration. You can us e the failure informati on to help repair the oscilloscope.

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