Agilent 81130A Getting Started

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Agilent 81130A 400/660MHz Pulse/Data Generator

Quick Start Guide

Front Panel Display and Softkeys

Mode / Parameter Area Modify / Enter Area

Use the CURSOR keys to

move the entry focus to a

mode, parameter format,

Channel 1

Column

parameter value

Channel 2

Column

Use the KNOB to select a

mode or modify parameters

and formats

Press ENTER or a UNIT key to

confirm parameter changes

ON Freq 50.00MHz OFF

OFF OFF

Entry

Focus

Delay DtyCyc

Press a SOFTKEY to access

the required entry screen

0ps

50.0%

Screen Selection Area

Delay 0ps Width 100.0ns

TIMING PATTERNLEVELSMODE/TRG

MODIFY

50.0

GRAPH

Press MORE key to access

the additional screen menus:

LIMITS TRG-LEV MEMCARD CONFIG

Quick Start Guide

Agilent 81130A 400/660 MHz

Pulse/Data Generator

Part No. 81130-91020

Printed in Germany March 2000

Edition 1.0, E0300

Notice

No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior agreement and written consent from Agilent Technologies Inc. as governed by United States and international copyright laws.

Notice

The material contained in this document is subject to change without notice. Agilent Technologies makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Agilent Technologies shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.

Warranty

This Agilent Technologies product has a warranty against defects in material and workmanship for a period of three years from date of shipment. During the warranty period, Agilent Technologies will, at its option, either repair or replace products that prove to be defective. For warranty service or repair, this product must be returned to a service facility designated by Agilent Technologies. The Buyer shall pay Agilent Technologies round-trip travel expenses. For products returned to Agilent Technologies for warranty service, the Buyer shall prepay shipping charges to Agilent Technologies and Agilent Technologies shall pay shipping charges to return the product to the Buyer. However, the Buyer shall pay all shipping charges, duties and taxes for products returned to Agilent Technologies from another country.

Notice

Agilent Technologies warrants that its software and firmware designated by Agilent Technologies for use with an instrument will execute its programming instructions when properly installed on that instrument. Agilent Technologies does not warrant that the operation of the instrument software, or firmware, will be uninterrupted or error free.

Limitation of Warranty

The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Buyer, Buyer-supplied software or interfacing, unauthorized modification or misuse, operation outside of the environmental specifications for the product, or improper site preparation or maintenance. No other warranty is expressed or implied. Agilent Technologies specifically disclaims the implied warranties of merchantability and fitness for a particular purpose.

Exclusive Remedies

The remedies supplied are the Buyer's sole and exclusive remedies. Agilent Technologies shall not be liable for any direct, indirect, special, incidental, or consequential damages, whether based on contract, tort or any other legal theory.

Certification

Agilent Technologies certifies that this product met its published specifications at the time of shipment. Agilent Technologies further certifies that its calibration measurements are traceable to the United States Institute of Standards and Technology, to the extent allowed by the Institute's calibrating facility, and to the calibration facilities of other International Standards Organization members.

Services and Support

Any adjustment, maintenance, or repair of this product must be performed by qualified personnel. Contact your customer engineer through your local Agilent Technologies Service Center. You can find a list of local service representatives on the Web at:

http://www.agilent.com/Service/English/index.html

Safety Summary

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.

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 60825-1.

Environmental 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 the product is set to match the available line voltage, the correct fuse is installed, and all safety precautions are taken. Note the instrument's external markings described under Safety Symbols on

page 8.

Safety Summary

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.

Fuses

Only fuses with the required rated current, voltage, and specified type (normal blow, time delay, etc.) should be used. Do not use repaired fuses or short-circuited fuse holders. To do so could cause a shock or fire hazard.

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 service 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.

Safety Summary

Safety Symbols

Caution (refer to accompanying documents)

Protective earth (ground) terminal

In the manuals:

WARNING

CAUTION

The WARNING sign denotes a hazard. It calls attention to a procedure, practice, or the like, which, if not correctly performed or adhered to, could result in personal injury. Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met.

The CAUTION sign denotes a hazard. It calls attention to an operating procedure, or the like, which, if not correctly performed or adhered to, could result in damage to or destruction of part or all of the product. Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met.

About this Book

This quick start guide helps you to quickly get familiar with the features and the user interface of the Agilent 81130A Pulse Generator.

Chapter 1 Introducing the Agilent 81130A Pulse and Data Generator on page 15 gives a general overview of the Agilent 81130A, its features,

the user interface, and the steps required for operating the instrument.

Chapter 2 Getting Started on page 31 gives the setup information for

some real-world signal examples, which can easily be used by varying only some parameter values.

Chapter 3 Using the Agilent 81130A on page 59 provides complete

information on the user interface screens.

Installation and maintenance are described in Appendix A Installation

& Maintenance on page 99.

For specifications and information on operating the instrument by means of remote control, please refer to the Reference Guide, p/n 81130-91021.

About this Book

Conventions Used in this Book

This book uses certain conventions to indicate elements of the Agilent 81130As user interface. The following table shows some examples:

Softkeys Press the MODE/TRG softkey to access the Mode/

Trigger screen.

Hardkeys Press the MORE key to switch to the alternative

softkey layout.

Alternate Keys Press SHIFT + 0 (ON/OFF1) to switch on output 1.

The alternate key labelwhich is selected by pressing the SHIFT keyis given in parentheses.

Screen Quotes Move the entry focus down to P

turn the knob to select

INTERNAL

ULSE-PERIOD

PLL.

and

Entry Focus The highlight field, that can be moved with the

cursor keys, to change modes, parameters, or parameter formats.

Contents

Notice ......................................................................................... 4

Safety Summary ......................................................................... 6

About this Book ......................................................................... 9

Chapter 1

Chapter 2

Introducing the Agilent 81130A Pulse and Data Generator

What you can do with the Agilent 81130A ............................ 16

The Front Panel ....................................................................... 18

Operating the Agilent 81130A ................................................ 20

Switching On the Instrument .............................................................. 20

The Basic Screens ................................................................................. 21

Adjusting Parameters ........................................................................... 24

Switching the Outputs On and Off ...................................................... 27

Using the Special Function Keys ........................................................ 27

Help is Available ...................................................................... 29

The Rear Panel ........................................................................ 30

Getting Started

Setting Up a Clock Signal ....................................................... 32

Setting Up a Burst Signal ....................................................... 37

Setting Up a Serial Data Stream ............................................ 41

Setting Up an Edge-Displacement Signal .............................. 46

Setting Up a Serial Data Sequence ........................................ 51

Contents

Chapter 3

Using the Agilent 81130A

The Mode/Trigger Screen ....................................................... 60

Overview ................................................................................................. 60

Continuous Pulses Mode ...................................................................... 63

Continuous Burst Mode ........................................................................ 64

Continuous Pattern Mode .................................................................... 65

Started Pulses Mode ............................................................................. 66

Started Burst Mode ............................................................................... 67

Started Pattern Mode ............................................................................ 68

Gated Pulses Mode ................................................................................ 69

Gated Burst Mode ................................................................................. 70

Gated Pattern Mode .............................................................................. 71

The Timing Screen .................................................................. 72

The Levels Screen ................................................................... 76

The Pattern Screen ................................................................. 79

The Segment Editor .............................................................................. 83

Block Editing Functions ....................................................................... 85

The Limits Screen ................................................................... 86

The Trigger-Level Screen ....................................................... 87

The Memory Card Screen ....................................................... 89

The Configuration Screen ...................................................... 92

The Output Screens ................................................................ 95

Warnings and Errors .............................................................. 96

xii

Contents

Appendix A

Installation & Maintenance

Initial Inspection ................................................................... 100

Standard Deliverables ........................................................................ 101

Options and Accessories: ................................................................... 102

Power Requirements ............................................................. 104

Power Cable ........................................................................... 106

Ventilation Requirements ..................................................... 107

Thermal Protection ............................................................................. 107

Battery ................................................................................... 108

Battery Replacement .......................................................................... 109

Operating Environment ........................................................ 110

Cleaning Recommendation ................................................... 111

Acoustic Noise Emission ....................................................... 112

xiii

Contents

xiv

1Introducing the

Agilent 81130A Pulse and

Data Generator

The purpose of the introduction chapter is to give a general overview of the Agilent 81130A.

The main features and use models are described in What you can do

with the Agilent 81130A on page 16.

Operating the instrument via the front panel user interface is described in

The Front Panel on page 18 and Operating the Agilent 81130A on page 20.

Help is Available on page 29 shortly introduces the Agilent 81130As

on-line help system.

Finally, The Rear Panel on page 30 takes a look at the back of the Agilent 81130A.

Introducing the Agilent 81130A Pulse and Data Generator

What you can do with the Agilent 81130A

This section introduces the basic features and use models of the Agilent 81130A Pulse Generator.

Basic Features

The Agilent 81130A is a pulse and data generator with one or two output channels. It is capable of generating all standard pulses, bursts, and patterns of pulses needed to test current logic technologies (for example, TTL, CMOS, ECL, PECL) and other digital designs up to 400 MHz/3.8V or 660 MHz/2.5V, depending on the installed output module(s).

The instrument features placement accuracy and accurate delay and deskew even at maximum output frequency. This contributes to reliable measurements and more accurate and confident characterizations of the device under test (DUT).

The instrument uses an accurate and stable For even more accuracy, it can be connected to an

reference

For programming complex packages, 64 kbit memory are available to store individual patterns. Each pattern can consist of up to four segments. Loops can be programmed over single segments or groups of consecutive segments. The segments can include

pseudo-randomly generated data

precision timing

data patterns

, providing highest edge

internal PLL oscillator

external frequency

, such as communication

If the Agilent 81130A is equipped with two output modules, the output channels can be used separately or be signals.

Complete signal setups can be stored locally (5 internal non-volatile registers available) or on a

memory card

added

digitally to form complex

Introducing the Agilent 81130A Pulse and Data Generator

What you can do with the Agilent 81130A

Benchtop Testing

The Agilent 81130A features a graphic display showing all pulse parameters at a glance. The cursor keys and the modify knob allow fast and simple operation.

The user interface is designed to minimize the time invested in getting familiar with the instrument. After familiarization, the instrument supports quick setups of signals. This leaves you free to concentrate on the measurement task and testing of the DUT.

Automated Testing

The Agilent 81130A features an GP-IB/SCPI-conform command structure for all features. Using this programming interface, the instrument can be easily integrated into all phases of test system development such as planning rack integration and test program generation.

Programs designed for the Agilent 81130A are compatible with all other models of the Agilent 81100 family.

NOTE

For a command reference list, please refer to the Reference Guide, part number 81130-91021.

Upgrade Capability

It is possible to upgrade the instrument with a second channel if only one channel has been ordered originally. There are two types of output modules available for the Agilent 81130A. You can only use one type of output module within one instrument.

Output Module Description

Agilent 81131A 400 MHz, 3.8 V

Agilent 81132A 660 MHz, 2.5 V

Introducing the Agilent 81130A Pulse and Data Generator

The Front Panel

When used for benchtop testing, the instrument is mainly operated from the front panel.

Front Panel

Switch

NOTE

Special Function

Keys

Softkeys

front panel switch

The

When the front panel switch is off, the instrument is in standby mode. The instrument is disconnected from the AC line power only by disconnecting the power cord.

The four keys below the display are the keys). The current function of each softkey is indicated in the corresponding box on the display.

Pressing the MORE key changes the softkey layout.

The other keys ( and the operating the instrument (see Operating the Agilent 81130A on

page 20).

rotary knob

MORE Key

is used to switch on and off the instrument.

special function keys, data entry keys, cursor keys

are used to select and modify parameters when

Data Entry

Keys

Inputs and Outputs

softkeys

Cursor

Keys

(software-controlled

Rotary

Knob

)

Introducing the Agilent 81130A Pulse and Data Generator

The major inputs and outputs of the instrument are available at the front panel:



The external input (EXT INPUT) can be used to connect an external arming source (started or gated modes). For details, please refer to

The Mode/Trigger Screen on page 60.



The clock reference input (CLK/REF INPUT) can be used to connect either an external clock signal or a reference signal for the internal PLL (see Pulse Period Source on page 94 and PLL Reference on

page 94).



The trigger signal (TRIGGER OUT) marks the start of the pulse period or of parts of a pattern (see The Mode/Trigger Screen on

page 60). You can set the output levels according to the used

technology (TTL, ECL, PECL) or enter test-specific values (see The

Trigger-Level Screen on page 87).



The OUTPUT connectors provide the signal output (normal and inverted), the indicators show the current state of the output (on or off).

The Front Panel

NOTE

For information on the use of the memory card slot, refer to The

Memory Card Screen on page 89.

Introducing the Agilent 81130A Pulse and Data Generator

Operating the Agilent 81130A

This section guides you through the first steps when operating the Agilent 81130A via the user interface.

NOTE

For information on operating the Agilent 81130A via remote control, please refer to the Reference Guide, part number 81130-91021.

Switching On the Instrument

After switching on the instrument the display indicates that the instrument selftest is running. This can take several seconds to complete.

If the selftest fails, you see a flashing E at the bottom of the screen. Press the HELP key to see a list of the selftest error messages. Use the knob or the cursor keys to scroll through the list if necessary.

To return to normal operation press HELP again. Note that the selftest error messages are removed from the error queue after this.

Introducing the Agilent 81130A Pulse and Data Generator

Operating the Agilent 81130A

The Basic Screens

The major parameters for pulse generation can be set up in 3 screens. For setting up patterns there are two more basic screens.

Mode/Trigger screen

The and trigger modes with respect to the signal required.

allows you to set the fundamental operating

Press the MODE/ TRG softkey to access this screen.

CONTINUOUS

PULSES

MODIFY

*Continous Started Gated

TIMING PATTERNLEVELSMODE/TRG

In this screen, you can set up the signal to be gated, started or continuous, and to be a pulse stream, a burst (several pulses followed by a pause) or a pattern.

In the lower section you can specify the trigger source and control the trigger output (in started and in gated mode).

Introducing the Agilent 81130A Pulse and Data Generator

Operating the Agilent 81130A

OFF OFF

Delay Width LeadE 0.8ns TraiE =LeadE

0ps Delay 0ps

100.0ns

TIMING PATTERNLEVELSMODE/TRG

Timing Screen

Press the TIMING

LEVELS softkey to access these screens.

Timing screen

The

and the

Levels screen

allow you to specify timing

and level parameters for the signals to be generated.

1.000

sPer

µµµµ

Width 100.0ns LeadE 0.8ns TraiE =LeadE

MODIFY

ON OFF

1.000

OFF OFF

Separate Outputs

µµµµ

High Low

+2.50V

+0.0MV

TIMING PATTERNLEVELSMODE/TRG

Offset 0.0MV Amplit 1.00V

MODIFY

+2.50

Levels Screen

In the Timing screen you can set up the clock frequency and, for output 1 and 2, the timing for the signals (delay, pulse width, duty cycle, ...).

The Levels screen allows you to specify the level parameters for the signals to be generated. You can select between preset values of different technologies and/or adjust values according to individual requirements. Set the values in terms of high/low level or offset/amplitude. If the Agilent 81130A is equipped with two output modules, the channels can be set as separate outputs or to be digitally added.

Pressing SHIFT + MORE (GRAPH) when the Timing or the Levels screen is displayed, toggles between the textual display and a graphical representation of the parameters.

1 OFF OFF 2 OFF OFF

TIMING PATTERNLEVELSMODE/TRG

Width

100.0

In both screens, you can switch on and off the outputs. Their status (ON or OFF) is indicated on screen and by an LED next to the output connector.

Introducing the Agilent 81130A Pulse and Data Generator

Pattern screen

The consisting of up to 4 segments. You can specify the length of each individual segment and then compose the sequence by specifying a reentrance point (where the instrument resumes after the end of the sequence) and/or a loop over consecutive segments.

allows you to compose a pattern sequence

Operating the Agilent 81130A

Segment Select

Resume Indicator (in gated/started

mode only)

Loop Indicator

Segment Length Loopcnt Update

32 1 2 0 3 0 4 0

TIMING PATTERNLEVELSMODE/TRG

To set up the data of a segment, you call the the segment to be edited and pressing the ENTER key.

Segment 1 Address 1

CH1 Data 1 0 0 0 0 0 0

UPDATE Length 32

segment editor

CH2 Data 0 0 0 0 0 0 0 Both 1 0 0 0 0 0 0

ENTER

*Edit Segm

by selecting

= ADDR

0 to Reset 1 to Set

Toggle

±±±±

TIMING PATTERNLEVELSMODE/TRG

Per channel you can select from different predefined data formats (such as high, or low, or pseudo-random data segment), you can enter data by using block editing functions, and you can enter the data bit by bit.

Introducing the Agilent 81130A Pulse and Data Generator

Operating the Agilent 81130A

Adjusting Parameters

Adjusting parameters within a screen, requires two steps:



selecting the parameter



adjusting its value

Some parameters allow different formats of their values. For example, the pulse width can be displayed and entered as an absolute value, as duty cycle (percentage of the period), or as the delay of the trailing edge.

The following sections show the standard procedure for adjusting parameters, and list some features useful for the advanced user.

Standard Procedure

To experience the standard procedure for adjusting parameters, consider the following example where the duty cycle is set to 50%.

Press the TIMING softkey to access the Timing screen.

Use the cursor keys to select the W

parameter.

IDTH

Selection Modify/Enter Area

OFF Per 1.000 µs OFF

OFF OFF

Delay

Width

0ps

100.0ns

Delay 0ps Width

100.0ns

MODIFY

*Width DutyCycle TrailDel

TIMING PATTERNLEVELSMODE/TRG

The available formats for the pulse width parameter are displayed in the Modify/Enter area.

Introducing the Agilent 81130A Pulse and Data Generator

Operating the Agilent 81130A

When changing the parameter format, the instrument automatically recalculates the value.

Turn the knob to select D The selected setting is indicated by an *.

Move the cursor to the right to select the duty cycle value.

Use the data entry keys or the knob to enter the required value: 50.

Press the ENTER key to confirm your selection.

UTYCYCLE

ON Per 1.000µs OFF

OFF OFF

Delay DtyCyc

0ps

50.0%

Delay 0ps Width 100.0ns

MODIFY

50.0

TIMING PATTERNLEVELSMODE/TRG

If you need to specify a unit for a parameter, simply press the appropriate unit key (

With this small example, you have learned the basic steps required for adjusting parameters. For a complete reference of parameters and formats available in the individual screens, refer to Chapter 3 Using the

Agilent 81130A on page 59.

NANO, MICRO/MEGA, MILLI/KILO

) instead of the ENTER key.

Introducing the Agilent 81130A Pulse and Data Generator

Operating the Agilent 81130A

Advanced Procedures

The following features can be used to make operation more comfortable.

 Selecting parameters

SHIFT

NOTE

Most keys of the front panel have an additional function. The SHIFT key provides fast access to the additional functions of the data entry keys and the special function keys.

For example, it is possible to quickly access the pulse width parameter by pressing SHIFT + 6 (WIDTH). The entry focus will be positioned on the corresponding editing field.

 Changing the step size

When modifying a value in the Modify/Enter area, pressing the SHIFT key followed by cursor left/right moves the cursor to a different digit in the displayed number.

Thus, you can change the step size for parameter change before you vary the value either with the up/down cursor keys or the knob.

 Overprogramming

Pressing the SHIFT key while turning the knob, it is possible to exceed specified parameter ranges to utilize the instrument to its limits.

Proper operation of the instrument outside of the specified ranges is not guaranteed. It is recommended to have the output switched on when overprogramming to have the internal error check system activated. This error check system warns you about impossible settings.

ON/OFF1

Introducing the Agilent 81130A Pulse and Data Generator

Operating the Agilent 81130A

Switching the Outputs On and Off

When you switch the instrument on, the outputs and inverted outputs are switched off to protect the device under test. The LED indicator next to the connector indicates the output state.

For example, to switch output 1 on or off



either press SHIFT + 0 (ON/OFF1),



or move the cursor to the ON/OFF parameter in the Timing or Levels screen and select the appropriate value by turning the knob.

To switch on or off output 2 and/or the inverted outputs, proceed in the same way. You can use the following short cuts:

Short Cut Output

SHIFT + 0 (ON/OFF1) Normal Out 1

MAN

RECALL

STORE

SHIFT + . (decimal point) (ON/OFF1

SHIFT + +/- (ON/OFF2) Normal Out 2

SHIFT + ENTER (ON/OFF2

) Inverted Out 2

) Inverted Out 1

Using the Special Function Keys

The instrument provides the following special function keys:



The MAN key can be used to run and to stop the instrument, and, in triggered or gated mode, to manually arm and/or trigger the instrument if there is no other source available (see The Mode/

Trigger Screen on page 60).



The STORE key can be used to store/recall to/from 1 to 4 individual settings in the instrument memory.

In the internal memory location 0 there is a default setting stored. Pressing SHIFT + STORE (RECALL) and selecting 0 resets the instrument to the default setting.

Introducing the Agilent 81130A Pulse and Data Generator

Operating the Agilent 81130A



SHIFT

LOCAL

HELP

The SHIFT key provides fast access to additional functions. When the front panel controls are locked in remote control, pressing

the SHIFT key unlocks the front panel controls.



The HELP key provides access to the instruments on-line help or in warning or error state, access to Warning/Error Report screen.

Pressing SHIFT + HELP (AUTOSET) sets the instrument to a valid setting based on the current period setting.

Help

Introducing the Agilent 81130A Pulse and Data Generator

Help is Available

Whenever you are in doubt or the instrument signals warnings or errors, press the HELP key.

If there are no warnings or errors pending, pressing the HELP key displays information on the currently selected parameter, the parameter help. More information is available within the help system:

 Parameter Help

The help information gives a short description of the parameter or setting options and the corresponding SCPI command(s) syntax for programming the parameter or setting.

If there is more than one screen available (indicated by small arrows), use the knob or the cursor keys to scroll through the help information.

To access parameter help from other screens of the help system, press the ON FIELD softkey.

Warnings and Errors

Exit Help

 Concept Help

Pressing the CONCEPT softkey within the help system displays a short description of the instrument.

 Serial Numbers and Software Revision

Pressing the SERIAL # softkey within the help system displays information on serial numbers and software revision codes of the instrument.

If there are warnings or errors pending (indicated by a flushing W or E), pressing the HELP key displays a list of the current messages. Using the ERROR QU and WARNING softkeys, you can toggle between both lists. For more information on warnings and errors, see Warnings and Errors on

page 96.

To exit from the help system, press the HELP key again, or press the EXIT HELP softkey.

Introducing the Agilent 81130A Pulse and Data Generator

The Rear Panel

The rear panel always provides two connectors:



The external input (EXT INPUT) can be used to connect an external arming source (started or gated modes).



The input connector for external clock or PLL reference (CLOCK/ REF INPUT) can be used if a higher frequency accuracy is required.



The GP-IB connector providing the interface for remote control.

The following figure shows the rear panel view with the option UN2.

CLK/REF InputExternal Input GP-IB Connector

Inputs and Outputs

With option UN2 the major inputs and outputs of the instrument (as described in The Front Panel on page 18) are available at the rear panel:



external input (EXT INPUT)



clock/reference input (CLK/REF INPUT)



trigger signal (TRIGGER OUT)



signal output (OUTPUT)

Fuse Holder

AC Line Socket Serial Number

2Getting Started

The intention of this chapter is to give the necessary steps to set up generic signals for first-time users of the Agilent 81130A.

This chapter provides examples for the following types of signals:



Setting Up a Clock Signal on page 32



Setting Up a Burst Signal on page 37



Setting Up a Serial Data Stream on page 41



Setting Up an Edge-Displacement Signal on page 46



Setting Up a Serial Data Sequence on page 51

At the end of each example, the required set of device commands is listed to provide programming examples. For further information on the commands and a complete command reference please refer to the Reference Guide, p/n 81130-91021.

The examples are intended to be performed one after the other. Therefore, the first example provides the most detailed instructions, while the other examples are described on a higher level.

Getting Started

Setting Up a Clock Signal

Ta sk

Instructions

Set up a continuous clock signal with 50 MHz frequency, a duty cycle of 50 %, a high level of 2.5 V and a low level of 0 V.

Duty Cycle = 50 %

2.5 V

0.0 V

f = 50 MHz

To set the

Reset all parameters and modes by pressing SHIFT + STORE (RECALL) + 0.

Press the MODE/TRG softkey to enter the Mode/Trigger screen. Trigger mode CONTINUOUS and operating mode PULSES are

selected by default.

CONTINUOUS

operating mode and trigger mode

PULSES

as required:

MODIFY

*Continous Started Gated

TIMING PATTERNLEVELSMODE/TRG

Setting Up a Clock Signal

Getting Started

To set the

Press the TIMING softkey to enter the Timing screen.

Press SHIFT + 0 (ON/OFF1). This turns on the Output 1 and activates the internal error check to

detect parameter conflicts.

Move the entry focus to P

Move the entry focus to the right (to the frequency entry field) and enter a value of 50 MHz by pressing 5 + 0 +

A warning is displayed, indicating a potential conflict in your settings. The conflict will be solved in the next steps.

If you want to view the warning message, press the HELP key. Return by pressing the HELP key again.

Move the entry focus down left to W D

Move the entry focus to the right and enter 50 % by typing 5 + 0 + ENTER.

Delay DtyCyc

timing parameters

UTYCYC

as required:

and turn the knob to select F

ON Freq 50.00MHz OFF

OFF OFF

0ps

50.0%

Delay 0ps Width 100.0ns

MICRO/MEGA

of output 1 and select

IDTH

REQUENCY

MODIFY

50.0

TIMING PATTERNLEVELSMODE/TRG

Getting Started

Setting Up a Clock Signal

Press SHIFT + MORE (GRAPH) or the TIMING softkey to see a preview of your signal.

1 ON OFF 2 OFF OFF

You can modify the parameter displayed in the Modify/Enter area, and immediately check how your changes affect the signal. Use the cursor keys to switch to another parameter.

Press SHIFT + MORE (GRAPH) or the TIMING softkey to return to the textual screen.

To set the

TIMING PATTERNLEVELSMODE/TRG

level parameters

DutyCyc1

50.0

as required:

Press the L

Move the entry focus to O turn the knob to select H

Move the entry focus to the L ENTER key. In the same way, enter 2.5 V for the high level.

softkey to enter the Levels screen.

EVELS

FFSET/AMPLIT

IGH-LOW

in the output 1 column and

entry field, enter 0 and press the

ON OFF

OFF OFF

Separate Outputs

High Low

+2.50V

+0.0MV

Offset 0.0MV Amplit 1.00V

TIMING PATTERNLEVELSMODE/TRG

MODIFY

+2.50

Setting Up a Clock Signal

Getting Started

NOTE

There is also a graphical screen available for the level parameters.

Here is the signal as displayed on an Agilent 54810A Infinium oscilloscope. Use the generators TRIGGER OUT to trigger the scope.

Getting Started

Setting Up a Clock Signal

Programming Example

If you want to include this clock signal in your GP-IB program, use the following command lines. The comment lines starting with a # are not required.

# Reset the instrument to start from a defined, default status. *RST

# Switch off the automatic display update to increase programming # speed. :DISPlay OFF

# Internal PLL has to be set as period source.

# Set the frequency to 50 MHz and the duty cycle to 50 % :FREQuency 50 MHZ :PULSe:DCYCle 50

# Set the high level to 2.5 Volts, the low level to 0.0 Volts. :VOLTage:HIGH 2.5V :VOLTage:LOW 0V

# Enable the output. :OUTPut ON

Setting Up a Burst Signal

Getting Started

Ta sk

Instructions

Set up a burst signal with a burst repetition of 4 clocks. Each burst consists of two pulses at a period of 100 ns. The pulse width is 25 ns. The levels are 2 Vpp amplitude and 0 V offset. On the second channel the clock reference is generated. The signals are issued while the MAN key is pressed.

Pulse Width = 25 ns

1 V

Output 1

Burst Signal

Output 2

Clock Signal

To set the

Trigger

Out

0 V

1 V

Pulse Period = 100 ns

1 V

0 V

1 V

Burst Period = 4 clocks

operating mode and trigger mode

as required:

Reset all parameters and modes by pressing SHIFT + STORE + 0.

Press the MODE/TRG softkey to enter the Mode/Trigger screen.

Move the entry focus to CONTINUOUS and turn the knob to select G

ATED

Move to PULSES and select BURST

Move to PULSES OUT 1 and select 2.

Move to OUT 2 and select 4.

Getting Started

Setting Up a Burst Signal

Move to BURST PERIOD and select 4 clocks.

Move to GATED BY and select M

Move right and select H

GATED

BURST of

IGHLEVEL

Pulses Out 1: 2 Out2: 4

Burst Period: 4 Clk Gated by:

MAN Key

AN KEY

RUN

MODIFY

*HighLevel LowLevel

TIMING PATTERNLEVELSMODE/TRG

To set the

Press the TIMING softkey to enter the Timing menu.

Switch on both outputs.

Enter a pulse period of 100 A warning is shown, which you may ignore because the parameter

conflict will be solved in the next steps.

In the output 1 column, enter a W

timing parameters

as required:

IDTH

of 25NS.

In the output 2 column, move to W value of 50 %.

ON Per 100.0ns OFF

OFF OFF

Delay Width

0ps

25.00ns

Delay 0ps DtyCyc 50.0 %

TIMING PATTERNLEVELSMODE/TRG

IDTH

, select D

UTYCYLE

, and enter a

MODIFY

50.0

Setting Up a Burst Signal

Getting Started

To set the

Press the LEVELS softkey to enter the Levels menu.

Enter an amplitude of 2.00 V for both outputs.

Offset Amplit

The following figure shows the signals as displayed on the Agilent 54810A Infinium Oscilloscope if the MAN key is pressed. Use the generators TRIGGER OUT to trigger the scope.

level parameters

ON OFF OFF OFF

Separate Outputs

+0.0MV

2.00V

as required:

Offset +0.0MV Amplit

TIMING PATTERNLEVELSMODE/TRG

2.00V

MODIFY

2.00

Getting Started

Setting Up a Burst Signal

Programming example

If you want to include this burst signal in your GP-IB program use the following command lines. The comment lines starting with a # are not required.

# Reset the instrument to start from a defined, default status. *RST

# Switch off the automatic display update to increase programming # speed. :DISPlay OFF

# Set the instrument to gated and set burst mode by selecting a # burst count of 4. :ARM:SOURce MAN :ARM:MODE:GATed :TRIGger:COUNt 4

# Set 2 pulses per burst for channel 1 and 4 pulses per burst for # channel 2. :TRIGger:COUNt:PULSes1 2 :TRIGger:COUNt:PULSes2 4

# Set the pulse period 100 ns, the width of channel 1 to 25 ns # and the duty cycle of channel 2 to 50%. :PULSe:PERiod 100NS :PULSe:WIDTh1 25NS :PULSe:HOLD2 DCYCLe :PULSe:DCYCLe2 50

# Set the output amplitudes to 2 Volts and the offsets to # 0 Volts. :VOLTage1 2V :VOLTage2 2V :VOLTage1:OFFSet 0V :VOLTage2:OFFSet 0V

# Enable the outputs. :OUTPut1 ON :OUTPut2 ON

Setting Up a Serial Data Stream

Getting Started

Setting Up a Serial Data Stream

Ta sk

Instructions

Set up a 24 bit long pattern with NRZ data output format, 80 MBit/s, and ECL output level.

To set the

Reset all parameters and modes by pressing SHIFT + STORE + 0.

Press the MODE/TRG softkey to enter the Mode/Trigger screen.

Move to PULSES and select PATTERN.

Move to the PULSES OUT 1 entry field and select NRZ.

Set T

CONTINUOUS PATTERN of

Pulses Out 1:

PRBS Polynom: 2^7-1

operating mode and trigger mode

RIGGER OUTPUT AT

NRZ

: to S

1 S

EGM

TART

Out 2: RZ

as required:

MODIFY

Clock *Segment1 Segment2

Trigger Output at:

Segm1 Start

Segment3

TIMING PATTERNLEVELSMODE/TRG

Getting Started

Setting Up a Serial Data Stream

NOTE

To set the

Press the TIMING softkey to enter the Timing menu.

Switch on the Output 1.

Enter a frequency of 80 MHz.

Delay Width

timing parameters

as required:

OFFON Freq 80.00MHz

OFF OFF

0ps

------

Delay 0ps Width

100.0ns

MODIFY

80.00

MHz

TIMING PATTERNLEVELSMODE/TRG

You cannot enter a pulse width because of the NRZ setting. This is indicated by the dashes in the W

To set the

Press the LEVELS softkey to enter the Level menu.

In the output 1 column, move the entry focus to OFFSET/AMPLIT and select S

level parameters

ECL.

as required:

entry field.

IDTH

Setting Up a Serial Data Stream

Getting Started

NOTE

To set up the

Press the PATTERN softkey to enter the Pattern menu.

Move the entry focus to the length entry of segment 1 and enter 24.

To start editing the data for the pattern, select 1 in the Segment column and press the ENTER key.

Move to the first data of channel 1, as shown in the figure:

Segment 1 UPDATE Address 1

CH1 Data 0 0 0 0 0 0 CH2 Data 0 1 0 0 0 0 0 Both 1 2 0 0 0 0 0

data pattern

as required:

Length 24

= ADDR

0 to Reset 1 to Set

Toggle

±±±±

TIMING PATTERNLEVELSMODE/TRG

Enter the following pattern using the 0 and 1 keys:

111001110011001001010010.

You can use the knob to scroll through the data of the segment.

Getting Started

Setting Up a Serial Data Stream

The following figure shows the signals as displayed on the Agilent 54810A Infinium Oscilloscope. Use the generators TRIGGER OUT to trigger the scope.

Setting Up a Serial Data Stream

Getting Started

Programming example

If you want to include this data stream signal in your GP-IB program use the following command lines. The comment lines starting with a # are not required.

# Reset the instrument to start from a defined, default status. *RST

# Switch off the automatic display update to increase programming # speed. :DISPlay OFF

# Enable pattern mode and set data format of channel 1 to NRZ :DIGital:PATTern:STATe ON :DIGital:SIGNal:FORMat NRZ

# Set data pattern of segment 1, channel 1. The leading two # digits “#0” are control information. The data pattern # starts at the third digit. :DIGital:PATTern:SEGMent1:DATA1 #0111001110011001001010010

# Set frequency to 80 MHz and levels to ECL levels. :FREQency 80MHz :VOLTage1:HIGH -0.8V :VOLTage1:LOW -2V

# Enable the output. :OUTPut ON

Getting Started

Setting Up an Edge-Displacement Signal

Ta sk

NOTE

Set up a continuous signal with one distorted pulse. The two channels are added with NRZ at both outputs. The high level is 1 V, low level is 0 V. The delay of output 2 is 30 ns and the bit frequency is 30 MHz.

For this example, both outputs and the channel addition feature are required. Therefore, this type of signal can only be performed with a Agilent 81130A with two output modules (Agilent 81131A or Agilent 81132A).

Channel 1

Channel 2

Signal at

Output 1

Signal at

Output 2

f = 30 MHz

10100010

00001000

Delay of Output 2

1.0 V

0.0 V

0.5 V

-0.5 V

NRZ Data Format

Setting Up an Edge-Displacement Signal

Getting Started

Instructions

To set the

Reset all parameters and modes by pressing SHIFT + STORE + 0.

Press the MODE/TRG softkey to enter the Mode/Trigger screen.

Move the entry focus to PULSES and select PATTERN.

Set P

operating mode and trigger mode

ULSES OUT

1 and OUT 2 to NRZ.

as required:

CONTINUOUS PATTERN of Pulses Out 1:

NRZ

PRBS Polynom: 2^7-1

Out 2: NRZ

RZ R1 *NRZ

Trigger Output at: Segm1 Start

TIMING PATTERNLEVELSMODE/TRG

To set the

Press the TIMING softkey to enter the Timing menu.

Enter a frequency of 30 MHz.

timing parameters

as required:

MODIFY

NOTE

Enter a D

OFF Freq 30.00MHz OFF

OFF OFF

Delay Width

of 30NS for Output 2.

ELAY

0ps

------

Delay 30.00ns Width ------

MODIFY

10.00

TIMING PATTERNLEVELSMODE/TRG

You cannot enter a pulse width because of the NRZ setting. This is indicated by the dashes in the W

entry field.

IDTH

Getting Started

Setting Up an Edge-Displacement Signal

To set the

Press the PATTERN softkey to enter the Pattern menu.

Enter a L

Move the entry focus to left and press the ENTER key to edit Segment 1.

Enter the pattern 10100010 for Channel 1.

Enter the pattern 00001000 for Channel 2.

Segment 1 Address 8

CH1 Data 0 0 1 0 CH2 Data 1 0 0 Both 2 0 1 0

data pattern

of 8 for Segment 1.

ENGTH

as required:

UPDATE Length 8

0 to Reset 1 to Set

±±±±

Toggle

TIMING PATTERNLEVELSMODE/TRG

To set the

Press the LEVELS softkey to enter the Level menu.

Switch on both outputs.

level parameters

as required:

= ADDR

Change S

Set H

High Low

EPARATE OUTPUTS

IGHLEVEL

to 1 V and LOWL

to 0.5 V and LOWL

to DIG.

EVEL

ADD AT OUT

to 0 V for output 1.

to 0.5 V for output 2.

EVEL

ON ON OFF OFF

Dig. add at Out 1

+1.00V +0.0MV

High Low

+500mV

-500mV

TIMING PATTERNLEVELSMODE/TRG

-500

MODIFY

Setting Up an Edge-Displacement Signal

The following figure shows the signal as displayed on the Agilent 54810A Infinium Oscilloscope. Use the generators channel 2 to trigger the scope.

Getting Started

Setting Up an Edge-Displacement Signal

Programming example

If you want to include this edge-displacement signal in your GP-IB program, use the following command lines. The comment lines starting with a # are not required.

# Reset the instrument to start from a defined, default status. *RST

# Switch off the automatic display update to increase programming # speed. :DISPlay OFF

# Set the data format to NRZ for both channels, enter the # patterns, and enable pattern mode. :DIGital:SIGNal:FORMat1: NRZ :DIGital:SIGNal:FORMat2: NRZ :DIGital:PATTern:SEGMent1:DATA1 #1810100010 :DIGital:PATTern:SEGMent1:DATA2 #1800001000 :DIGital:PATTern:STATe ON

# Set the frequency and the delay for channel 2. :FREQency 30MHz :PULSe:DELay2 30ns

# Set the levels of outputs 1 and 2 and enable digital channel # addition. :VOLTage1:HIGH 1V :VOLTage1:LOW 0V :VOLTage2:HIGH 0.5V :VOLTage2:LOW -0.5V :CHANnel:MATH DIGital

# Enable the output. :OUTPut1 ON :OUTPut2 ON

Setting Up a Serial Data Sequence

Getting Started

Setting Up a Serial Data Sequence

Ta sk

NOTE

Set up a serial data sequence at 166.7 MHz, consisting of a header, simulated payload data accompanied by a clock on output 2, and a trailing pause.

Header Payload Trailing Pause

Output 1

Data

PRBS

Output 2

Clock

Trigger Out

For this example, both outputs are required. Therefore, this type of signal can only be performed with a Agilent 81130A with two output modules (Agilent 81131A or Agilent 81132A).

Getting Started

Setting Up a Serial Data Sequence

Instructions

To set the

Reset all parameters and modes by pressing SHIFT + STORE + 0.

Press the MODE/TRG softkey to enter the Mode/Trigger screen.

Move the entry focus to PULSES and select PATTERN.

Move to PULSES OUT 1 and select NRZ.

Move to OUT 2 and select RZ.

Set the PRBS P

Set T

operating mode and trigger mode

OLYNOM

RIGGER OUTPUT AT

to 215  1.

: to S

EGM

2 S

TART

as required:

CONTINUOUS PATTERN of Pulses Out 1:

NRZ

PRBS Polynom: 2^15-1

Out 2: RZ

Clock Segment1 *Segment2

Trigger Output at:

Segm2 Start

Segment3

TIMING PATTERNLEVELSMODE/TRG

MODIFY

Setting Up a Serial Data Sequence

Getting Started

NOTE

To set the

Press the TIMING softkey to enter the Timing menu.

Switch on both outputs.

Enter a period of 6

Enter a W

Delay Width

timing parameters

of 3NS for output 2.

IDTH

as required:

ON Per 6.000ns ON OFF OFF

0ps

------

Delay Width

0.00ns

3.000ns

MODIFY

3.000

TIMING PATTERNLEVELSMODE/TRG

You cannot enter a pulse width for output 1 because of the NRZ setting. This is indicated by the dashes in the W

To set the

Press the LEVELS softkey to enter the Level menu.

level parameters

as required:

entry field.

IDTH

Select S

TTL for both outputs.

Getting Started

Setting Up a Serial Data Sequence

NOTE

To set the

Press the PATTERN softkey to enter the Pattern menu.

Move to U This speeds up data setting.

Set the length of Segment 1 to 16 (header).

Set the length of Segment 2 to 32 (payload data).

Set the length of Segment 3 to 16 (trailing pause).

The frequency of 166.7 MHz requires a segment length resolution of 8. See Segment/Length/Loop Control Table on page 81. Therefore, the lengths of the segments must be set to be multiples of 8.

Segment Length Loopcnt No Upd

data pattern

and select NO U

PDATE

as required:

PDATE

MODIFY

1 16 1 2 32 3

4 0

TIMING PATTERNLEVELSMODE/TRG

Setting Up a Serial Data Sequence

Getting Started

Move the entry focus to 1 in the S ENTER key to edit the segment.

Enter 1110101001101101 as channel 1 data.

Select L

OW SEG

for channel 2.

Segment 1 NO UPD Address 16

CH1 Data CH2

Low

Both

1 1 0 1 0 0 0 0 1 1 0 1

Length 16

EGMENT

column and press the

MODIFY

Data Seg High Seg *Low Seg PRBS Seg

TIMING PATTERNLEVELSMODE/TRG

Move to the S

Select PRBS for channel 1 to generate pseudo-random payload data.

Select H

EGMENT

IGH SEG

Segment 2 NO UPD Address

CH1 PRBS 15 CH2

entry field and select segment 2.

for channel 2 to generate the clock pulse.

Length 32

MODIFY

Data Seg

1 1 1 1 1 1 1High

*High Seg Low Seg PRBS Seg

TIMING PATTERNLEVELSMODE/TRG

Getting Started

Setting Up a Serial Data Sequence

Move to the Segment entry and select segment 3.

Select L

Segment 3 NO UPD Address 1

CH1 Low CH2 Both

for both channels.

Low

Length 16

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

MODIFY

Data Seg High Seg *Low Seg PRBS Seg

TIMING PATTERNLEVELSMODE/TRG

Move to NO UPD and press the ENTER key.

The following figure shows the signals as displayed on the Agilent 54810A Infinium Oscilloscope. Use the generators TRIGGER OUT to trigger the scope.

Setting Up a Serial Data Sequence

Getting Started

Programming example

If you want to include this data sequence in your GP-IB program, use the following command lines. The comment lines starting with a # are not required.

# Reset the instrument to start from a defined, default status. *RST

# Set the trigger output to start of segment 1 :SOUR:PULS:TRIG:MODE START :SOUR:PULS:TRIG:POS 1

# Program segment 1 :DIG:PATT:SEGM1:DATA1 #01110101001101101 :DIG:PATT:SEGM1:TYPE2 LOW

# Set the length of segments 2 and 3 :DIG:PATT:SEGM2:LENG 32 :DIG:PATT:SEGM3:LENG 16

# Program segment 2 :DIG:PATT:SEGM2:TYPE1 PRBS :DIG:PATT:SEGM2:TYPE2 HIGH

# Program segment 3 :DIG:PATT:SEGM3:TYPE1 LOW :DIG:PATT:SEGM3:TYPE2 LOW

# Set the pulses format at output 1 to NRZ, the format at # output 2 to RZ :DIG:SIGN1:FORM NRZ :DIG:SIGN2:FORM RZ

# Set the levels of outputs 1 and 2 to TTL levels. :VOLTage1:HIGH 2.5V :VOLTage1:LOW 0V :VOLTage2:HIGH 2.5V :VOLTage2:LOW 0V

# Program a period of 6 ns :SOUR:PULS:HOLD2 DCYC :SOUR:PULS:PER 6ns

Getting Started

Setting Up a Serial Data Sequence

# Enable pattern mode :DIG:PATT ON

# Enable the outputs :OUTP1 ON :OUTP2 ON

3Using the Agilent 81130A

This chapter provides complete reference information for using the Agilent 81130A by means of the user interface screens.

Each screen is described in detail. To access the individual screens, use the softkeys below the screen. There are two softkey layouts:



the default layout

TIMING PATTERNLEVELSMODE/TRG



the alternative layout displayed after pressing the MORE key

TRG-LEV CONFIGMEMCARDLIMITS

At the end of this chapter, Warnings and Errors on page 96 provides details on the instruments warning and error messaging system.

NOTE

For general information on using the Agilent 81130A and information on the instruments hardkeys, please refer to Chapter 1 Introducing the

Agilent 81130A Pulse and Data Generator on page 15.

For information on using the Agilent 81130A via remote control, please refer to the Reference Guide, part number 81130-91021.

Using the Agilent 81130A

The Mode/Trigger Screen

This section describes the Mode/Trigger screen, starting with an overview of the available parameter combinations, followed by detailed descriptions of each combination.

Overview

To access the Mode/Trigger screen, press the MODE/TRG softkey.

The following figure shows a typical Mode/Trigger screen, where the individual parameters are indicated. The parameter combinations are listed in the table on the next page.

➃ ➄

➀

STARTED

Pulses Out 1:RZ Out 2: RZ

PRBS Polynom: Trg'd by:

Trigger Output at: Segm1 Start

PATTERN of

TIMING PATTERNLEVELSMODE/TRG

➁

2^7-1

➂

EXT-IN

Run/Stop Indicator

STOP

Continuous *Started Gated

MODIFY

➅

In this screen, you can start and stop the instrument and set up the signal to be continuous, started or gated and to be a pulse stream, a burst (several pulses followed by a pause) or a pattern.

Using the Agilent 81130A

The Mode/Trigger Screen

Furthermore, you can specify the trigger input and the trigger output behavior.

The following table provides a list of possible parameter combinations. The rows refer to the numbers in the figure.

Tri gg er

➀

Mode

Pulse Mode Pulses Burst Pattern Pulses Burst Pattern Pulses Burst Pattern

➁

Pulse

➂

PRBS

➃

Polynom/ Burst Period

Arming

➄

Source/ Tri gg ere d by

Tri g g er O u t

➅

Continuous Started Gated

marks

each pulse

period

265504 RZ

265504 clocks

marks

start of

burst

R1 NRZ

2 2

each pulse

1 to

1

marks

period or

start of

segment

14

MAN

Ext. Input

each pulse

key

marks

period

265504 RZ

265504 clocks

marks

start of

burst

R1 NRZ

1 to

1

marks

each pulse

period or

start of

segment

14

MAN

Ext. Input

marks

each pulse

period

key

265504 RZ

265504 clocks

marks

start of

burst

Run/Stop Indicator

In started and gated mode, the Run/Stop indicator shows the current function of the MAN key:



if the indicator shows RUN, pressing the MAN key starts the instrument, that is: trigger/gate is armed

R1 NRZ

1 to

1

marks

each pulse

period or

start of

segment

14



if the indicator shows STOP, pressing the MAN key stops the instrument, that is: generating of the current signal is aborted and the trigger/gate is not armed

Using the Agilent 81130A

The Mode/Trigger Screen

Pattern Formats

NOTE

In pattern mode, the from RZ, R1, and NRZ. The timing of the different formats is shown in the diagram:

111001

NRZ

To generate DNRZ (Delayed NRZ) signals, program NRZ pulses with a delay. See Pulse Delay Parameter on page 74.

pulse output format

of a pattern can be selected

Random Pattern

To g e n e rate can be selected as a pulse type. To determine the repetition length of the

PRBS sequence, specify the parameter n of the PRBS Polynom 2 The value range is 7 to 15. This allows to specify repetition lengths

between 2

random data, PRBS

 1 = 127 and 215 1 = 32767.

(Pseudo Random Binary Sequence)

 1.

NOTE

The sequence is stored in the memory. This reduces the available memory for data patterns.

The instrument always cycles completely through the PRBS sequence. When used multiple times or by different segments, the sequence is not restarted at the beginning of another segments execution.

Characteristics

Using the Agilent 81130A

The Mode/Trigger Screen

Continuous Pulses Mode

The following figure shows typical timings for trigger mode CONTINUOUS and pulse mode PULSES.

Period

Output

Trigger Out



Pulse periods are generated continuously.



TRIGGER OUT marks each pulse period.

Using the Agilent 81130A

The Mode/Trigger Screen

Continuous Burst Mode

The following figure shows typical timings for trigger mode CONTINUOUS and pulse mode BURST.

Output A

3 pulses per burst

Output B

2 clocks per burst

Trigger Out



Characteristics

A burst of pulse periods is repeated continuously.



You can select the burst periods (total of pulse periods per burst) in the range of 265504.



You can select the number of pulses per burst in the range of 265504 up to the burst period.

Burst Period 4 Clocks

Period



TRIGGER OUT marks each start of a burst.

Using the Agilent 81130A

The Mode/Trigger Screen

Continuous Pattern Mode

The following figure shows typical timings for trigger mode CONTINUOUS and pulse mode PATTERN.

Period

Output A

Characteristics

Output B

Output C

NRZ

Trigger Out

A pattern of pulses is repeated continuously.



You can select between RZ, R1 and NRZ data pulses for each output.



In the pattern screen (see The Pattern Screen on page 79) you can



select the pattern length and the data values for each output



divide your pattern into individual, repeatable segments.



You can select TRIGGER OUT to mark each pulse period, or the start



of a selected segment.

Using the Agilent 81130A

The Mode/Trigger Screen

Started Pulses Mode

The following figure shows typical timings for trigger mode STARTED and pulse mode PULSES. The pulses are triggered by the rising edge of the arming source.

Arming Source

Trg'd by: Ext Input or MAN Key

Trg'd by:

Output

Trigger Out

Characteristics

Pulse periods are triggered by (T



RG'D BY

) an active edge at the

selected arming source:

MAN key on front panel, triggered by pressing or releasing.



EXT INPUT triggered by rising or falling edges.



TRIGGER OUT marks each pulse period.



NOTE For the delay between trigger in to output refer to Agilent 81130A

Reference Guide, Chapter 3 Specifications.

Using the Agilent 81130A

The Mode/Trigger Screen

Started Burst Mode

The following figure shows a typical timing for trigger mode STARTED and pulse mode BURST. The bursts are triggered by the rising edge of the arming source.

Arming Source

(Trg'd by:) EXT INPUT

3 pulses per burst

2 pulses per burst

Trigger Out

or MAN Key

Output A

Output B

Trg'd b y:

Period

Burst Period of 4 clocks

Characteristics

A burst of pulse periods is triggered by an active edge at the selected



arming source

MAN key on front panel, triggered by pressing or releasing.



EXT INPUT triggered by rising or falling edges.



You can select the burst periods (total of pulse periods per burst) in



the range of 265504.

You can select the number of pulses per burst in the range of 265504



up to the burst period.

TRIGGER OUT marks each start of a burst.



Using the Agilent 81130A

The Mode/Trigger Screen

Started Pattern Mode

The following figure shows typical timings for trigger mode STARTED and pulse mode PATTERN. The patterns are triggered by the rising edge of the arming source.

Arming Source

(Trg'd by:) EXT INPUT

or MAN Key

Output A

Trg'd by:

Loop Restart

Period

Pattern of 3

Characteristics

Output B

Output C

NRZ

101

Trigger Out

The pattern is repeated only if it is embedded in a loop.

A pattern of pulses is triggered by an active edge at the selected



arming source

MAN key on front panel, triggered by pressing or releasing.



EXT INPUT triggered by rising or falling edges.



You can select between RZ, R1 and NRZ data pulses for each output.



In the pattern screen (see The Pattern Screen on page 79) you can



select the pattern length and the data values for each output



divide your pattern into individual, repeatable segments.



You can select TRIGGER OUT to mark each pulse period or the start



of a selected segment.

Using the Agilent 81130A

The Mode/Trigger Screen

Gated Pulses Mode

The following figures show typical timings for trigger mode GATED and pulse mode PULSES.

Gated by:

Arming Source

(Gated by:) EXT INPUT

or MAN Key

Output

Trigger Out

Characteristics

Pulse periods are gated by (enabled by) an active level at the selected



arming source:

MAN key on the front panel, gated while pressed.



EXT INPUT (external signal) gated by high or low.



TRIGGER OUT marks each pulse period.



Using the Agilent 81130A

The Mode/Trigger Screen

Gated Burst Mode

The following figure shows typical timings for trigger mode GATED and pulse mode BURST.

Arming Source

(Gated by:) EXT INPUT

3 pulses per burst

2 pulses per burst

Trigger Out

Gated by:

or MAN Key

Burst Period of 4 clocks

Period

Output A

Output B

Characteristics

Bursts of pulse periods are gated by (enabled by) an active level at



the selected arming source:

MAN key on the front panel, gated while pressed or released.



EXT INPUT (external signal) gated by high or low.



You can select the burst periods (total of pulse periods per burst) in



the range of 265504.

You can select the number of pulses per burst in the range of 265504



up to the burst period.

TRIGGER OUT marks each start of a burst.



NOTE When the gate signal is deasserted, the burst generation will be

interrupted immediately and resume with the next phase after the gate signal is asserted again.

Using the Agilent 81130A

The Mode/Trigger Screen

Gated Pattern Mode

The following figure shows typical timings for trigger mode GATED and pulse mode PATTERN.

Characteristics

Arming Source

(Gated by:) EXT INPUT

or MAN Key

Output A

Output B

Output C

NRZ

Period

110

Gated by:

Pattern of 3

Trigger Out

A pattern of pulses is gated by an active level at the selected arming



source

MAN key on front panel, gated while pressed or released



EXT INPUT (external signal) gated by high or low.



You can select between RZ, R1 and NRZ data pulses for each output.



In the pattern screen (see The Pattern Screen on page 79) you can



select the pattern length and the data values for each output



divide your pattern into individual, repeatable segments.



You can select Trigger out to mark each pulse period or the start of a



segment.

NOTE When the external gate signal is deasserted, the pattern generation will

be interrupted immediately and resume with the next phase after the gate signal is asserted again (with the MAN key, pattern generation will always start from the beginning).

Using the Agilent 81130A

The Timing Screen

To access the Timing screen press the TIMING softkey.

You can use the left part of the Timing screen to view and control the pulse timing parameters of channel 1, the right part for those of channel 2.

OFF OFF

Delay Width LeadE 0.8ns TraiE =LeadE

The individual timing parameters are described in more detail in the following. Parameters can be entered in different formats. The L

E and T

EAD

output module only.

If you prefer to set the timing parameters per output together with the level parameters of that output, switch the type of parameter grouping. See Parameter Grouping on page 93.

NOTE If only one channel is installed, Timing and Levels screens are grouped in

an Output screen automatically.

0ps Delay 0ps

100.0ns

E parameters are available with the AGILENT 81131A

RAI

1.000

TIMING PATTERNLEVELSMODE/TRG

µµµµ

sPer

Width 100.0ns LeadE 0.8ns TraiE =LeadE

1.000

MODIFY

µµµµ

Using the Agilent 81130A

The Timing Screen

When you press SHIFT + MORE (GRAPH) or the TIMING softkey again, you will see a graphical representation of the timing parameters of both channels. The currently selected parameter is displayed in the Modify/Enter area and is indicated by dashed or bold lines in the graphical display.

1 OFF OFF 2 OFF OFF

TIMING PATTERNLEVELSMODE/TRG

1 OFF OFF 2 OFF OFF µs

Use the left/right cursor keys to move to an individual timing parameter.

NOTE Note that in graphics mode you can only adjust the values of each

parameter, not the parameter format. If you want to change the format of a parameter, for example W select the parameter name with the cursor.

Press SHIFT + MORE (GRAPH) or the TIMING softkey again to toggle between textual and graphical display.

Width

100.0

TIMING PATTERNLEVELSMODE/TRG

to DTYCYC, you must be in text mode to

IDTH

Period

1.000

Using the Agilent 81130A

The Timing Screen

Output ON/OFF Parameter

Switch on and off the normal output and the inverted output of each channel.

NOTE If a channel is switched on, this also activates the internal error check to

detect parameter conflicts.

OFF OFF

You can use short cuts as described in Switching the Outputs On and

Off on page 27.

normal

inverted

Pulse Period Parameter

Set the pulse period as either P

ERIOD

or F

REQUENCY

Pulse Delay Parameter

Set the delay of the leading edge within the pulse period. There are three delay formats available:



(select A

ELAY

is the absolute delay from the start of a pulse period to the

ELAY

start of the leading edge of the pulse.

% (select % OF P

ELAY

The delay from the start of the pulse period to the start of the leading edge expressed as a percentage of the pulse period.

(select P

HASE

The phase delay in degrees from the start of the pulse period to the start of the leading edge (360° = 1 pulse period).

BSOLUTE

HASE

)

ERIOD

)

Using the Agilent 81130A

The Timing Screen

Pulse Width Parameter

Set the width of the output pulse. There are three width formats available:

IDTH

(select W



The absolute pulse width measured from the start of the leading edge to the start of the trailing edge. In this format, the pulse width is independent of changes in pulse period and delay.

IDTH

)



TYCYC

(select D

UTYCYCLE

)

The duty cycle is the pulse width measured from the start of the leading edge to the start of the trailing edge expressed as a percentage of the period. In this format, if you adjust the period, the absolute width is adjusted to maintain the duty cycle.



RADEL

(select T

RAILDEL

)

The trailing delay is the absolute delay from the start of the pulseperiod to the start of the trailing edge. In this format the trailing edge remains fixed relative to the start of the pulse period if you adjust the pulse delay (leading edge delay) or the pulse period.

Leading Edge/Trailing Edge Parameter

This parameter is available only with the AGILENT 81131A output module.

Select between two different values of the transition time of the pulse.



EAD

Set the transition time to 0.8 or 1.60 ns.

RAI

The trailing edge is always the same as the leading edge.

Using the Agilent 81130A

The Levels Screen

To access the Levels screen press the LEVELS softkey.

You can use the left part of the Levels screen to view and control the level parameters of channel 1, the right part for those of channel 2, and you can select to add the channels.

OFF

OFF OFF

Separate Outputs

Offset Amplit

When you press SHIFT + MORE (GRAPH) or the LEVELS softkey, you will see a graphical representation of the level parameters. The currently selected parameter is displayed in the Modify/Enter area and is indicated in the graphical display.

OFF OFF

+0.0MV

1.00V

TIMING PATTERNLEVELSMODE/TRG

+3V

Offset 0.0MV Amplit 1.00V

OFF OFF

OFF

+3V

*OFF norm ON out

MODIFY

Offset1

0.0

-2V TIMING PATTERNLEVELSMODE/TRG

-2V

When output limits are on, the limits are indicated on the Levels screen in graphics mode (see The Limits Screen on page 86).

Using the Agilent 81130A

The Levels Screen

If you prefer to set the level parameters per output together with the timing parameters of that output, switch the type of parameter grouping. See Parameter Grouping on page 93.

NOTE If only one channel is installed, Timing and Levels screens are grouped in

an Output screen automatically.

NOTE Note that in graphics mode you can only adjust the values of each

parameter, not the parameter format. If you want to change the format of a parameter, for example O

FFS-AMPL

to H

IGH-LOW

, you must be in text

mode to select the parameter name with the cursor.

NOTE When the output is switched on, the instrument monitors the actual

voltage and current levels at the output. The output is automatically switched off if voltage levels or power dissipation reach levels that could damage the output circuits.

Separate Outputs/Digital Add Parameter

Select the outputs of channel 1 and 2 to be separate or digitally added (available only in text mode):



EPARATE OUTPUTS

(select S

EPARATE

)

Output 1 and 2 operate as entirely separate outputs.



IGITAL ADD AT OUT

1 (select DIG. ADD)

Channel 1 and 2 are added (XOR-combined). The resulting signal is available at the output 1 connector. Use this to build complex pulse waveforms. Channel 2 is still available.

NOTE The channel add option is available if the AGILENT 81130A is equipped

with an additional output module AGILENT 81131A or AGILENT 81132A.

Using the Agilent 81130A

The Levels Screen

Offset/Amplitude, High/Low Level Parameters

Set and display the pulse levels in terms of either offset and amplitude, or high and low level. You can quickly set TTL or ECL output levels using the S



TTL and SET ECL formats.

TTL

Set the levels to the default TTL levels automatically: TTL-HI: +2.50 V

TTL-LOW: +0.0 mV The default levels are set once and can be adjusted afterwards by

moving the entry focus to the values as normal.



IGH-LOW

Select high and low level format for the pulse levels.



FFS-AMPL

Select offset and amplitude format for the pulse levels. Offset is measured from 0V to the middle of the pulse amplitude. Pulse amplitude is the difference between the high and low levels of the pulse.

ECL



Set the levels to the default ECL levels automatically: ECL-HI: 850 mV

ECL-LOW: 1.80 V These default levels are set once and can be adjusted afterwards by

moving the entry focus to the value as normal.

Voltage/Current Mode (mV/V/mA/A)

Move the entry focus onto the level units to select between setting the pulse levels

IN VOLTS

NOTE This parameter is only available in text mode.

or IN A

MPERES

Using the Agilent 81130A

The Pattern Screen

Use the Pattern screen to set up a pattern sequence to be generated by the instrument.

To access the Pattern screen, press the PATTERN softkey.

Segment Select

Resume Indicator (in gated/started

mode only)

Loop Indicator

Segment Length Loopcnt Update

32 1

*Edit Segm

ENTER

2 0 3 0 4 0

TIMING PATTERNLEVELSMODE/TRG

The pattern sequence can consist of up to 4 individual segments of a specific length. Each segment contains the data for channel 1 and 2.

In gated and in started mode you can select to execute the sequence only once or to jump back to a segment of your choice at the end of the sequence (resume indicator).

You can build loops by specifying:

the loop start segment (loop indicator)



the length of the loop, that is the total of segments in the loop (loop



indicator)

the loop count, that is how often the loop is executed.



Using the Agilent 81130A

The Pattern Screen

Update Parameter

Select to update the hardware after each of your changes in the screen or only on demand.



PDATE

(select U

PDATE

)

The hardware is updated automatically after each change. Changes will affect the output signal immediately.



O UPD

(select NO U

PDATE

)

The hardware is not updated automatically. For faster editing, complete your programming before you update the hardware, then move the entry focus to N

and press the ENTER key.

O UPD

Resume Indicator

This indicator is only available in gated and started mode. Specify how the sequence is to be executed.



UN ONCE

The sequence is executed only once.



UMP TO SEGMENT

Select a segment with which the instrument should resume after the last segment of the sequence has been executed.

1 ... 4 (select

JMPTO SEG

1 ...

JMPTO SEG

Using the Agilent 81130A

The Pattern Screen

Segment/Length/Loop Control Table

The parameters in this table control the segment and loop parameters. You can move the entry focus to any cell of the table.



EGMENT

column

Select a segment to edit. Press ENTER to invoke the segment editor. See The Segment Editor on page 83.



ENGTH

column Adjust the length of the segment. The maximum length of all segments is 65504 per channel. If PRBS

data is used, this value is reduced by the repetition length as given by the PRBS Polynom parameter.

NOTE Reducing the length of a programmed segment results in the loss of as

many bits as the segment length is reduced, even if the length is raised again later.

The

segment length resolution

, that is the steps in which you can

set the segment length, depends on the required data rate:

Resolution

Maximum Data Rate in MBit/s

Period in ns

1 41.67 24.00 ... max. period

2 83.33 12.00 ... 23.99

4 166.7 6.000 ... 11.99

8 333.3 3.000 ... 5.999

16 666.7 1.500 ... 2.999

Example:

If a data rate of 300 MBit/s is required, each segment length must be a multiple of 8 (8, 16, 24, 32, ...).

Using the Agilent 81130A

The Pattern Screen



Loop indicator Use the loop indicator to specify the start segment and the length of

the loop. Move the entry focus to the indicator, select



OOPSTART

to specify the start segment of the loop and press the

ENTER key. Choose from S

EGMENT

1 ... S

EGMENT

4 and press the ENTER key

again.



OOPLENGT

to specify the length of the loop and press the ENTER

key. Choose from 1 S

EGMENT

... 4 S

EGMENT

and press the ENTER key

again.



OOPCNT

column In the Loopcount column, specify how often the loop is to be

executed (maximum loopcount is 2

NOTE If counted loops (loop counter, loop indicator) are used, the minimum

length for the first segment is required to be twice the segment length resolution.

If only an infinite loop (resume indicator, continuous mode) is used, the sum of all used segment lengths is required to be twice the segment length resolution.

Using the Agilent 81130A

The Pattern Screen

The Segment Editor

Use the segment editor to set up a data segment for the pattern sequence.

To edit a segment, select the segment in the Segment column of the Pattern screen and press the ENTER key.

Bit-editing window

Segment 1 Address 1

CH1 Data 1 0 0 0 0 0 0 CH2 Data 0 0 0 0 0 0 0 Both 1 0 0 0 0 0 0

UPDATE Length 32

= ADDR

0 to Reset 1 to Set

±±±±

Toggle

TIMING PATTERNLEVELSMODE/TRG

The parameters Segment, Update, and Length refer to the corresponding entries in the Pattern screen.

The CH1 and CH2 rows contain the bits of the data patterns for channel 1 and channel 2. The B entering the decimal equivalent:

CH1

CH2

OTH

When you press SHIFT + MORE (GRAPH), you will see a graphical representation of the data. This is especially helpful when viewing and editing NRZ data.

0101 0011 0123

row allows to edit both channels together by

OTH

Address Parameter

The current bit address in the segment is displayed. Use the knob to scroll through the data or enter a value to move to a particular address.

Using the Agilent 81130A

The Pattern Screen

Data Type Parameter

Select a data type per channel. It is displayed next to the CH1 and CH2 column.



ATA

This allows you to enter the bits of your sequence manually or by using block editing functions. See Block Editing Functions on

page 85.

, L

IGH

Set all bits to high or low.

PRBS Set all bits to be generated pseudo-randomly. The following rules apply when PRBS data is used:

in the same segment, the data type of the other channel must be



high, low, or PRBS

over all segments, PRBS must only be used in combination with



the same data type

Example:

The following table shows an example of how the PRBS data type may be combined in a pattern sequence of 4 segments:

Segment 1 Segment 2 Segment 3 Segment 4

Channel 1

Channel 2

Data PRBS Data PRBS

Low High Data High

NOTE Specify the repetition length of the pseudo-random data sequence in the

Mode/Trigger screen. See The Mode/Trigger Screen on page 60.

Using the Agilent 81130A

The Pattern Screen

Block Editing Functions

The block editing functions can help when entering bit patterns.

Move the entry focus onto the CH1, CH2, or BOTH at the left hand side of the screen. Select from the following options and press ENTER.

ILL

0, F



Set all bits from the current position to the end of the sequence to 0 or 1.



NVERT

Invert all bits from the current position to the end of the sequence.



IRST BIT

Set the first bit to 1, and all following bits to 0.



AST BIT

Set the last bit to 1, and all preceding bits to 0.



NS BIT

Insert a bit at the current position. The bit value is copied from the current bit, all subsequent bits are shifted right. The last bit is lost.

ILL



EL BIT

Delete the bit at the current position. All subsequent bits are shifted left. The new last bit of the sequence is copied from the old last bit.



LOCK

Fill the bits from the current position to the last with a divided clock pattern. After pressing ENTER you can adjust the dividing factor n from 2 to 32768 and press ENTER again.

The bit sequence will be set up as follows:

Sequence

2 101010101010101... 6 111000111000111... 3 100100100100100... 7 111000011100001... 4 110011001100110... 8 111100001111000... 5 110001100011000... 9 1111000001111000...

Using the Agilent 81130A

The Limits Screen

Use the Limits screen to set up voltage and current limits for the pulse level parameters to prevent accidental damage of the device under test.

To access the Limit screen press the LIMITS softkey. If the softkey is not displayed, press MORE.

Limits OFF

High-V +500mV Low-V -500mV High-A +10.0mA Low-A -10.0mA

TRG-LEV CONFIGMEMCARDLIMITS

After you switch on the limits, the pulse level parameters on the Levels screen cannot be adjusted outside the ranges specified on the Limits screen if the output is switched on.

The limits are displayed in the Level screen in graphics mode.

Limits OFF

High-V +500mV Low-V -500mV High-A +10.0mA Low-A -10.0mA

MODIFY

*OFF ON

Using the Agilent 81130A

The Trigger-Level Screen

Use the Trigger-Level screen to

set the termination voltage and the triggering threshold for the



EXT INPUT connector

set the termination voltage for the CLK/REF INPUT connector



set the output termination and levels for the TRIGGER OUT



connector.

To access the Trigger-Level screen, press the TRG-LEV softkey. If the softkey is not displayed, press MORE.

EXT-IN: +0.00V

Term

Tres +1.00V

CLK-IN: Term +0.00V TR-OUT: TTL into 0V/50

TRG-LEV CONFIGMEMCARDLIMITS

ΩΩΩΩ

term

+ENTER

*Variable Set TTL Set ECL Set PECL

Using the Agilent 81130A

The Trigger-Level Screen

External Input Connector

Select a termination voltage and a threshold for the external input connector (E



Move the entry focus to the voltage fields and enter the termination voltage and the threshold in the range of 2.1 V to +3.3 V.



The termination voltage and termination are adjusted according to the selected technology.

These default values are set once and can be adjusted afterwards by moving the entry focus to the value as usual.

Clock Input Connector

Select a termination voltage clock input connector (CLK-IN). Press the ENTER key to complete.



Move the entry focus to the voltage field and enter the termination voltage in the range of 2.1 V to +3.3 V.

). Press the ENTER key to complete.

XT-IN

ARIABLE

TTL, SET ECL, SET PECL

ARIABLE



TTL, SET ECL, SET PECL

The termination voltage is adjusted according to the selected technology.

These default values are set once and can be adjusted afterwards by moving the entry focus to the value as usual.

Trigger Out Connector

Select an output level and termination according to the technology used at the trigger output (T

R-OUT

Using the Agilent 81130A

The Memory Card Screen

Use the Memory Card screen to

store instrument settings to the memory card,



recall instrument settings from the memory card,



delete files from the memory card,



format a memory card.



To access the Memory Card screen, press the MEMCARD softkey. If the softkey is not displayed, press MORE.

Dir Path \

Filename TESTVI.TXT

MODIFY

Perform Operation

TRG-LEV CONFIGMEMCARDLIMITS

Directory Path Parameter

Move the entry focus to DIR P card, or to view the sub-directories of the current directory (the name of the current directory is displayed next to D

All sub-directories of the current directory are listed in the Modify/Enter area.

To change the directory, turn the knob to select the directory name and press the ENTER key.

Note that when you are in a sub-directory you can return to the parentdirectory by selecting .. from the directory list.

to change the directory on the memory

ATH

IR PATH

Using the Agilent 81130A

The Memory Card Screen

Filename Parameter

Move the entry focus to the F

ILENAME

parameter to select a file from the current directory. Use the knob to scroll through the filenames listed in the Modify/Enter area.

Memory Card Operations

Move the entry focus to P

ERFORM OPERATION

the required operation. Press the ENTER key to perform the operation.



EADCARD

Read the DOS file system information from the memory card after inserting a new card.



ECALL

Recall the selected file as the current instrument setting.



TORE

Store the current instrument setting to the memory card. Press ENTER once to start editing the filename for the setting in the

Modify/Enter area. The currently selected filename is used as default.

CAUTION If you do not modify the filename, the existing file will be overwritten

when you press ENTER.

To modify the filename, move the character cursor with the cursor keys. Modify a character using the knob. When you have finished, press ENTER to store the setting.

The filename can be up to 8 characters long. Press the cursor up or cursor down keys to cancel the store operation

at any time. Note that the DOS filename suffix .ST0 is added automatically to the

filename when you store the current settings.

and use the knob to select

Using the Agilent 81130A

The Memory Card Screen



TORE ALL

Store the current instrument setting and the instrument setting memories 1 to 4 to the memory card. Each setting is stored in a separate file with the same name but different suffixes (.ST0 for the current setting, .ST1 to .ST4 for setting memories 1 to 4).

Press ENTER once to start editing the filename for the setting in the Modify/Enter area. The currently selected filename is used as default.

CAUTION If you do not modify the filename, the existing file will be overwritten

when you press ENTER.

To modify the filename, move the character cursor with the cursor keys. Modify a character using the knob. When you have finished, press ENTER to store the setting.

The filename can be up to 8 characters long. Press the cursor up or cursor down keys to cancel the store operation

at any time.



ELETE

Delete the selected file from the memory card.



ORMAT

Format the memory card.

CAUTION Formatting a memory card destroys any existing files on the card.

Using the Agilent 81130A

The Configuration Screen

Use the Configuration screen to:

set the GP-IB address of the Agilent 81130A



initiate instrument selftests



group parameters by timing/levels or by output 1/2



select the pulse period source



select the frequency reference source for the PLL



compensate for delays between channel 1 and 2 by deskewing



To access the Configuration screen, press the CONFIG softkey. If the softkey is not displayed, press MORE.

GP-IB Address: 10

Perform Selftest:

µµµµ

P and Signal

MODIFY

Group Params by: TIMING/LEVELS Pulse-Period: internal PLL

PLL-Ref: Internal Deskew 1: +0ps 2: +0ps

TRG-LEV CONFIGMEMCARDLIMITS

GP-IB Address

Set the GP-IB address for the instrument in the range of 0 to 30. The default address is 10.

Perform Operation Selftest

Using the Agilent 81130A

The Configuration Screen

Move the entry focus to P

ERFORM

: S

ELFTEST

, select the test type, and

press the ENTER key.

µP B



OARD

Perform a selftest on the microprocessor board of the Agilent 81130A.



IGNAL

Perform a selftest on the timing and output modules of the Agilent 81130A.

µP



ROCESSOR AND SIGNAL

(select B

OTH

)

Perform both selftests.

If the selftests fail, a flashing E is displayed. Press HELP to see the list of error messages.

Parameter Grouping

The timing and level parameters of both outputs 1 and 2 can be displayed in separate screens either grouped by parameter types (timing/level), or by output.

Move the entry focus to G



IMING/LEVELS



UTPUT

1/2

ROUP PARAMS BY

For descriptions of the screens, refer to The Timing Screen on

page 72, The Levels Screen on page 76 or The Output Screens on page 95.

: and select between

NOTE If only one channel is installed, Timing and Levels screens are grouped in

an Output screen automatically.

Using the Agilent 81130A

The Configuration Screen

Pulse Period Source

The instrument provides an internal PLL to generate the pulse period. However, you can use an external clock source applied to the CLK/REF INPUT connector instead.



NTERNAL

PLL

Internal PLL is used for pulse period generation.

CLK-IN



External clock source is used for pulse period generation.

NOTE The externally applied clock signal is measured once when CLK-IN is

selected. During the measurement, the instrument cannot generate pulses.

If the external frequency is changed without re-measuring, all timing parameters become invalid. To update the measurement, select M O

in the Period/Frequency entry field of the Timing screen and press

NCE

EASURE

the ENTER key.

PLL Reference

Set the frequency reference source for the PLL:



NTERNAL

An internal signal is used as reference.

CLK-IN



An external reference signal at the CLOCK/REF INPUT connector is used. The frequency must be 1, 2, 5, or 10 MHz.

NOTE The PLL reference parameter is available only if I

as P

ULSE-PERIOD

parameter.

Deskew Parameter

Set the deskew of output 1 and 2 in the range of + 25.05 ns to compensate for different cable delays.

NTERNAL

PLL is selected

Using the Agilent 81130A

The Output Screens

If two channels are installed, the Output screens show both, timing and level parameters combined on one screen for output 1 and one screen for output 2. To make the Output screens available, the parameter G P

ARAMS BY

Configuration Screen on page 92).

To access an Output screen, press the OUTPUT1 or OUTPUT2 softkey.

NOTE If only one channel is installed, Timing and Levels screens are grouped in

an Output screen automatically.

: must be set to OUT1/2 in the Configuration screen (see The

ROUP

Using the Agilent 81130A

Warnings and Errors

The Agilent 81130A has two levels of error reporting called warnings and errors. Checking for errors and warnings is always enabled, unless you switch it off via the GP-IB using the :SYSTem:CHECk command or by switching off the output(s).

A warning

to a combination of worst case uncertainties at the current settings of all relevant parameters.

For example, when adjusting the pulse width, all other timing parameters and their uncertainties have to be considered in order to check if the width setting will fits within the pulse period.

Note that the warning limits are therefore not fixed for a particular parameter, but vary with the settings of the related parameters. It is also possible that the error and warning limits are the same, that is, a warning does not occur before the error limit is reached.

If a warning occurs, the settings are still implemented in the hardware because the worst-case conditions used to evaluate the warning limits are very unlikely to occur in practice.

A blinking W indicates that one or more warnings have occurred. Press HELP to view the warning list.



error

required parameter settings cannot be implemented in the output hardware. Multiple errors can occur, but only the first error detected is displayed.

An error is indicated by a blinking error message at the bottom of the screen.

NOTE If the output(s) are switched off and you are using the knob to adjust

parameters, it is usually not possible to generate warnings or errors. All parameters are automatically limited to settings that guarantee specified operation.

However, if you press the SHIFT key while turning the knob, you can adjust a parameter beyond its warning limits. This requires the output(s) to be switched on.

is generated when the output signal could be invalid due

is generated when an invalid mode is chosen, or the

Using the Agilent 81130A

Warnings and Errors

NOTE You can press SHIFT + HELP (AUTOSET) to carry out an autoset. The

instrument resets all parameters, based on the current period setting, to remove all warning and error conditions.

An Example of Warning and Error Reporting

Switch on the instrument and recall the standard settings by pressing

SHIFT + STORE (RECALL) + 0. The period is now set to 1 µs.

Switch on the output by pressing SHIFT + 0 (ON/OFF).

On the Timing screen, move the parameter cursor to the value of the

parameter (100NS).

IDTH

Use the knob to make the pulse width as large as possible (998.5

This limit is intended to guarantee that the actual output pulse is within specifications, for the actual period.

Press SHIFT and adjust the pulse width above its warning limit. A

flashing W appears to indicate that a warning condition has occurred.

NOTE Note that as long as no errors occur, the output hardware is set up and

attempts to generate the required output.

Press HELP to see the warning message:

IDTH

TOO CLOSE TO PERIOD

Press HELP again to return to the W

Increase the pulse width further until a flashing error message

parameter.

IDTH

appears (approximately 999.5 ns): OUTPUT 1: W You have reached the current upper error-limit of the W

IDTH

> P

ERIOD

IDTH

parameter. The setting is not possible with the hardware.

Press SHIFT + HELP to perform an AUTOSET.

Using the Agilent 81130A

Warnings and Errors

AInstallation & Maintenance

Initial Inspection

Inspect the shipping container for damage. If the container or cushioning material is damaged, keep it until the contents of the shipment have been checked for completeness and the instrument has been verified both mechanically and electrically.

WARNING

To avoid hazardous electric shock, do not perform electrical tests when there are signs of shipping damage to any part of the instruments outer covers or panels.

If the contents are incomplete, or there is mechanical damage, or if the instrument does not work as expected within its specifications, notify the nearest Agilent office. (Please request the latest performance tests from Agilent Technologies.) Keep the shipping materials for inspection by the carrier. The Agilent office will arrange for repair or replacement without awaiting settlement.

100

Agilent 81130A Getting Started

Specifications and Main Features

Frequently Asked Questions

User Manual

Notice

Safety Summary

About this Book

The Front Panel

Switching On the Instrument

The Basic Screens

Adjusting Parameters

Switching the Outputs On and Off

Using the Special Function Keys

Help is Available

The Rear Panel

2Getting Started

Setting Up a Clock Signal

Setting Up a Burst Signal

Setting Up a Serial Data Stream

Setting Up an Edge-Displacement Signal

Setting Up a Serial Data Sequence

The Mode/Trigger Screen

Overview

Continuous Pulses Mode

Continuous Burst Mode

Continuous Pattern Mode

Started Pulses Mode

Started Burst Mode

Started Pattern Mode

Gated Pulses Mode

Gated Burst Mode

Gated Pattern Mode

The Timing Screen

The Levels Screen

The Pattern Screen

The Segment Editor

Block Editing Functions

The Limits Screen

The Trigger-Level Screen

The Memory Card Screen

The Configuration Screen

The Output Screens

Warnings and Errors

AInstallation & Maintenance

Initial Inspection