Agilent 81110A Getting Started

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Agilent 81110A 165/330 MHz

Agilent 81104A 80 MHz Pulse/Pattern Generators

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Quick Start Guide

Agilent 81110A 165/330 MHz,

Agilent 81104A 80 MHz

Pulse/Pattern Generators

Part No. 81110-91020

Printed in Germany April 2000

Edition 1.1, E0400

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Notice

 Agilent Technologies 1998, 2000

Herrenberger Str. 110140

71034 Boeblingen

Germany

Warranty

This Agilent 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s round-trip travel expenses. For products returned to Agilent Technologies for warranty service, the Buyer shall prepay shipping charges to Agilent and Agilent 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. Agilent Technologies warrants that its software and firmware designated by Agilent for use with an instrument will execute its programming instructions when properly installed on that instrument. Agilent does not warrant that the operation of the instrument software, or firmware, will be uninterrupted or error free.

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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.

Assistance

Product maintenance agreements and other customer assistance agreements are available for Agilent products. For any assistance, contact your nearest Agilent Sales Office.

Certification

Agilent Technologies Company certifies that this product met its published specifications at the time of shipment. Agilent 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.

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About this Book

This quick start guide helps you to quickly get familiar with the features and the user interface of the Agilent 81110A Pulse Generator.

The information is valid for Agilent 81104A and Agilent 81110A. Where required the differences are explicitly mentioned. Possible configurations are:

Output Modules for 81104A Mainframe

Module Description Max Quantity

81105A 10V/ max.80 MHz Output Channel 2

Output Modules for 81110A Mainframe

Module Description Max Quantity

81111A 10V/ max. 165 MHz Output Channel 2

81112A 3.8V/ max. 330 MHz Output Channel 2

As standard the instruments are equipped with one output channel. Therefore, some of the described features will not be available on all instruments.

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Chapter 1 Introducing the 81110A/81104A Pulse and Pattern Generators on page 15 gives a general overview of the Agilent 81110A,

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 81110A/81104A on page 59 provides complete

information on the user interface screens.

Installation and maintenance are described in Appendix A Installation

& Maintenance on page 111.

For specifications and information on operating the instrument by means of remote control, please refer to the Reference Guide, p/n 81110-91021.

Conventions Used in this Book

This book uses certain conventions to indicate elements of the Agilent 81110A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.

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Safety Information

Safety

This is a Safety Class 1 instrument (provided with terminal for protective earthing). Before applying power, verify that the correct safety precautions are taken (see the following warnings). In addition, note the external markings on the instrument that are described under Safety Symbols. Do not operate the instrument with its covers removed. Replace fuse only with specified type.

Warning

Before turning on the instrument, you must connect the protective earth terminal of the instrument to the protective earth conductor of the (mains) power cord. The mains plug must only be inserted in a socket outlet with a protective earth contact. Do not negate the protective action by using an extension power cord without a protective grounding conductor. Grounding one conductor of a two-conductor outlet is not sufficient protection.

Service instructions are for trained service personnel. To avoid dangerous electric shock, do not perform any service unless qualified to do so. Do not attempt internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is present.

If you energize this instrument using an auto-transformer (for voltage reduction), make sure that the common terminal is connected to the earth terminal of the power source.

Whenever it is likely that the ground protection is impaired, you must make the instrument inoperative and secure it against any unintended operation.

Do not operate the instrument in the presence of flammable gases or fumes. Operation of any electrical instrument in such an environment constitutes a definite safety hazard.

Do not install substitute parts or perform any unauthorized modification to the instrument.

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Capacitors inside the instrument may retain a charge even if the instrument is disconnected from its source of supply.

Safety Symbols

Instruction Manual symbol: The instrument is marked with this symbol when it is necessary for you to refer to the instruction manual in order to protect against damage to the instrument.

Protected conductor symbol.

In the manuals:

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CCCCAAAAUUUUTTTTIIIIOOOONNNN Cautions call attention to a procedure, practice, or the like, which, if not

Warnings call attention to a procedure, practice, or the like, which, if not correctly performed or adhered to, could result in personal injury or loss of life. Do not proceed beyond a Warning until the indicated conditions are fully understood and met.

correctly performed or adhered to, could result in damage to or destruction of part or all of the equipment. Do not proceed beyond a Caution until the indicated conditions are fully understood and met.

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

About this Book ......................................................................... 6

Output Modules for 81104A Mainframe ............................................... 6

Output Modules for 81110A Mainframe ............................................... 6

Safety Information .................................................................... 8

Chapter 1

Chapter 2

Introducing the 81110A/81104A Pulse and Pattern Generators

What you can do with the 81110A/81104A ............................ 16

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

Operating the 81110A/81104A ................................................ 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 ........................................................ 28

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

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

Getting Started

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

Setting Up a Pulse Signal ........................................................ 37

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

Setting Up an Edge-Displacement Signal .............................. 45

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Setting Up a Dual Clock Signals ............................................ 50

Setting Up a Burst Signal ....................................................... 55

Chapter 3

Using the 81110A/81104A

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

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

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

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

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

Triggered Pulses Mode ........................................................................ 66

Triggered Burst Mode ........................................................................... 68

Triggered Pattern Mode ........................................................................ 70

Gated Pulses Mode ................................................................................ 72

Gated Burst Mode ................................................................................. 74

Gated Pattern Mode .............................................................................. 75

External Width Mode ............................................................................ 76

The Timing Screen .................................................................. 77

The Levels Screen ................................................................... 83

The Pattern Screen ................................................................. 88

Hints on Editing Pattern Data .............................................................. 94

The Limits Screen ................................................................... 95

The Trigger-Level Screen ....................................................... 96

The Memory Card Screen ....................................................... 98

The Configuration Screen .................................................... 103

The Output Screens .............................................................. 106

xii

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Warnings and Errors ............................................................. 107

Warning and Error Reporting Example ........................................... 108

Appendix A

Installation & Maintenance

Initial Inspection ................................................................... 112

Standard Deliverables ........................................................................ 113

Options and Accessories: ................................................................... 114

Power Requirements ............................................................. 116

Power Cable ........................................................................... 118

Ventilation Requirements ..................................................... 119

Thermal Protection ............................................................................. 119

Battery ................................................................................... 120

Battery Replacement .......................................................................... 121

Operating Environment ........................................................ 122

Cleaning Recommendation ................................................... 123

Acoustic Noise Emission ....................................................... 124

xiii

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xiv

1Introducing the

81110A/81104A Pulse and

Pattern Generators

The purpose of the introduction chapter is to give a general overview of the 81110A/81104A.

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

with the 81110A/81104A on page 16.

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

The Front Panel on page 18 and Operating the 81110A/81104A on page 20.

Help is Available on page 29 shortly introduces the 81110A/81104As

on-line help system.

Finally, The Rear Panel on page 30 takes a look at the back of the 81110A/81104A.

Introducing the 81110A/81104A Pulse and Pattern Generators

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What you can do with the 81110A/81104A

This section introduces the basic features and use models of the 81110A/81104A Pulse and Pattern Generators.

Basic Features

The Pulse and Pattern Generators generate all standard pulses, digital patterns and multi-level waveforms needed to test all current logic technologies (such as TTL, CMOS, ECL, PECL, LVDS, GTL) and other digital designs up to 330 MHz.

The instruments provide a reliable and wide range of signals, which can be used in even more applications than its predecessor, the Agilent 8110A. This is due to enhancements made in the feature set and specifications of the Agilent 8110A. The glitch and drop out free varying of any timing parameter and the timing calibration feature of the Agilent 81110A/81104A contribute to more accurate and confident characterizations of the DUTs.

Benchtop Testing

The 81110A/81104A feature 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.

Introducing the 81110A/81104A Pulse and Pattern Generators

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Automated Testing

The 81110A/81104A has the same SCPI conform command structure for the feature sets identical to the Agilent 8110A. As with the Agilent 8110A, the new product can be easily integrated into all phases of test system development such as planning rack integration and test program generation. These benefits along with the low cost of ownership make the 81110A/81104A an invaluable instrument in a wide range of technical applications. Programs designed for the Agilent 81104A can be used without any changes for the Agilent 81110A with Agilent 81111A 10V/165 MHz outputs.

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number 81110-91021.

The Agilent 81110A compared to the Agilent 81104A has better accuracy, up to 330 MHz clock rate, 800 ps typical edges at up to 3.8 V, and a timing auto calibration.

Upgrade Capability

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It is possible to upgrade the instruments with a second channel if only one channel was originally ordered. There are two output channels available for the Agilent 81110A. The second channel that is installed must be the same as channel one.

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Mainframe Module Description

Agilent 81104A Agilent 81105A 10V/ max. 80 MHz Output

Channel

Agilent 81110A Agilent 81111A

Agilent 81112A

10V/ max. 165 MHz Output Channel

3.8V/ max. 330 MHz Output Channel

Introducing the 81110A/81104A Pulse and Pattern Generators

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The Front Panel

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

Special Function

Keys

Front Panel

Switch

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Softkeys

front panel switch

The

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 81110A/81104A on

page 20).

MORE Key

special function keys, data entry keys, cursor keys

rotary knob

is used to switch on and off the instrument.

are used to select and modify parameters when

Data Entry

Keys

Inputs and Outputs

softkeys

Cursor

Keys

(software-controlled

Rotary

Knob

)

Introducing the 81110A/81104A Pulse and Pattern Generators

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 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 96).

 The strobe signal (STROBE OUT) marks beginning and end of a burst

in Burst mode. In Pattern mode, this signal is programmable per bit.

 The OUTPUT connectors provide the signal output (normal and

inverted), the indicators show the current state of the output (on or off).

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Memory Card Screen on page 98.

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Introducing the 81110A/81104A Pulse and Pattern Generators

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Operating the 81110A/81104A

This section guides you through the first steps when operating the 81110A/81104A via the user interface.

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please refer to the Reference Guide, part number 81110-91021.

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 81110A/81104A Pulse and Pattern Generators

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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.

Press the MODE/TRG softkey to access this screen.

The

Mode/Trigger screen

allows you to set the fundamental operating

and trigger modes with respect to the signal required.

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 81110A/81104A Pulse and Pattern Generators

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Timing Screen

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The Timing screen and the Levels screen allow you to specify timing and level parameters for the signals to be generated.

Levels Screen

Press the TIMING

LEVELS softkey

to access these screens.

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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 81110A/81104A is equipped with two output modules, the channels can be set as separate outputs or to be digitally added.

The Configuration Screen on page 103).

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

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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.

The Pattern screen allows you to compose a data stream composed of RZ or NRZ signals.

You can set up the length of the pattern and edit the pattern data for each address within the pattern. Additionally, the strobe output can be programmed for each address, providing a comfortable trigger output in pattern mode.

You can enter data by using block editing functions, and you can enter the data bit by bit.

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Memory location currently selected

Bit-Editing window

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comfortably as a burst signal.

Pattern length

Introducing the 81110A/81104A Pulse and Pattern Generators

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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

Selection Modify/Enter Area

OFF Per 1.000 µs OFF

OFF OFF

Delay

Width

0ps

100.0ns

Delay 0ps Width

parameter.

IDTH

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 81110A/81104A Pulse and Pattern Generators

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

3 Turn the knob to select D

The selected setting is indicated by an *.

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

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

6 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

81110A/81104A on page 59.

NANO, MICRO/MEGA, MILLI/KILO) instead of the

ENTER

key.

Introducing the 81110A/81104A Pulse and Pattern Generators

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Advanced Procedures

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

 Selecting parameters

SHIFT

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

SHIFT

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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.

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.

Introducing the 81110A/81104A Pulse and Pattern Generators

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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.

ON/OFF1

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

SHIFT + . (decimal point) (ON/OFF1

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

SHIFT + ENTER (ON/OFF2

) Inverted Out 2

) Inverted Out 1

Introducing the 81110A/81104A Pulse and Pattern Generators

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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

MAN

RECALL

STORE

SHIFT

LOCAL

HELP



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 9 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.

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.

Introducing the 81110A/81104A Pulse and Pattern Generators

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Help is Available

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

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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.

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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.

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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 107.

HELP softkey.

Introducing the 81110A/81104A Pulse and Pattern Generators

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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 81110A/81104A.

This chapter provides examples for the following types of signals:



Setting Up a Clock Signal on page 32



Setting Up a Pulse Signal on page 37



Setting Up a Serial Data Stream Signal on page 41



Setting Up an Edge-Displacement Signal on page 45



Setting Up a Dual Clock Signals on page 50



Setting Up a Burst Signal on page 55

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 81110-91021.

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

SSSSeeeett

ttiiiinnnng

g UUUUp a

p a CCCClllloc

ock

k SSSSiiiiggggna

tttt

g g

p a p a

ococ

nallll

k k

nana

Setting Up a Clock Signal

TTTTaaaask

sk Set up a continuous clock signal with 50 MHz frequency with PLL

sksk

accuracy, a duty cycle of 50 %, 3 ns transition times, a high level of 2.5 V and a low level of 0 V.

IIIInnnnssssttttrrrruc

ucttttiiiion

ucuc

onssss To set the

onon

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.

Move the entry focus down to select S P

ULSE-PERIOD: INTERNAL

operating mode and trigger mode

INGLE-PULSES AT OUT

PLL.

as required:

1 and then

Getting Started

SSSSeeeettttttttiiiinnnng

g UUUUp

p a

a CCCClllloooocccck

g g

p p

k SSSSiiiign

a a

k k

To set the timing parameters as required:

1 Press the TIMING softkey to enter the Timing menu.

2 Move the entry focus to the output 1 status with the cursor keys.

Select ON in the Modify area to turn on the output 1. This turns on the output 1 and activates the internal error check to

detect parameter conflicts.

gnaaaallll

gngn

3 Move the entry focus to P

4 Move the entry focus to the F

50 MHz by pressing 5 + 0 +

and select F

entry field and enter a value of

REQ

/ M

MICRO

EGA

REQ

5 Move the entry focus down to the width of output 1 and select

UTYCYC

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

ENTER.

7 Move the entry focus down to enter 3 +

Trailing edge should be the same as leading edge (T

NNNNOOOOTE

TE With Agilent 81110A with Agilent 81112A 3.8V/330 MHz output channels

TETE

for the leading edge.

NANO

RAIL

E = L

installed the transition times can be either 800 ps or 1.6 ns, trailing edge is equal to leading edge. The minimum transition times for the Agilent 81104A are 3 ns.

EAD

E).

Getting Started

SSSSeeeett

ttiiiinnnng

g UUUUp a

p a CCCClllloc

tttt

g g

p a p a

ock

k SSSSiiiiggggna

nallll

ococ

k k

nana

To set the level parameters as required:

1 Press the LEVELS softkey to enter the Levels menu.

2 Move the entry focus to O

area select H

IGH-LOW

FFSET

and A

MPLITUDE

and in the MODIFY

3 Move the entry focus to the high level entry field and press 2 + . + 5 +

ENTER for the high level.

4 Move down the entry focus to the low level entry field and press 0 +

ENTER. For the Agilent 81104A or 81110A with an 81105 module installed, the

screen looks as follows.

For the Agilent 81110A with an 81112 module installed, the screen looks as follows.

Getting Started

SSSSeeeettttttttiiiinnnng

g UUUUp

p a

a CCCClllloooocccck

k SSSSiiiign

g g

p p

a a

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

gnaaaallll

k k

gngn

Getting Started

SSSSeeeett

ttiiiinnnng

g UUUUp a

p a CCCClllloc

tttt

g g

p a p a

ock

k SSSSiiiiggggna

ococ

k k

nallll

nana

PPPPrrrrooooggggrrrraaaammmmmmmmiiiing

ng ng

EEEExxxxaaaammmmpppplllleeee

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. :ARM:SOURce INT2

# Set the frequency to 50 MHz, the duty cycle to 50% and the leading # and trailing edge to 3 ns. Settings are to program for output 1. :FREQuency 50MHZ :PULSe:DCYCle1 50 :PULSe:TRANsition1 3NS

# For example, the same settings for the optional second channel will # look like as follows: :PULSe:DCYCle2 50 :PULSe:TRANsition2 3NS

# Set the high level to 2.5 Volts, the low level to 0.0 Volts. :VOLTage1:HIGH 2.5V :VOLTage1:LOW 0V

# Enable the output 1 and the complement output 1 (Agilent 81110A # with Agilent 81112A 3.8V/330 MHz output channel installed, only). :OUTPut1 ON :OUTPut1:COMPlement ON

Getting Started

SSSSeeeettttttttiiiinnnng

g UUUUp

p a

a PPPPuuuullllsssse

g g

p p

e SSSSiiiign

a a

e e

Setting Up a Pulse Signal

TTTTaaaask

sk Set up a continuous pulse signal with 20 ns period, a pulse width of 10 ns,

sksk

a leading edge of 3 ns, a trailing edge of 5 ns, an amplitude of 3.3 V and an offset of 1.65 V (high level 3.3 V, low level 0.0 V).

gnaaaallll

gngn

IIIInnnnssssttttrrrruc

ucttttiiiion

ucuc

onssss To set the

onon

Reset all parameters and modes by pressing SHIFT + STORE (RECALL) + 0. For reference the current MODE/TRG screen is displayed. There is

nothing to change.

To set the

Press the TIMING softkey to enter the Timing menu.

operating mode and trigger mode

timing parameters

as required:

Getting Started

SSSSeeeett

ttiiiinnnng

g UUUUp a

p a PPPPuuuullllsssse

tttt

g g

p a p a

e SSSSiiiiggggna

nallll

e e

nana

2 Switch ON the output channel 1.

3 Enter a period of 20

4 Enter 3

for leading edge. Select A

enter a value of 5

NNNNOOOOTE

TE With Agilent 81110A with Agilent 81112A 3.8V/330 MHz output channels

TETE

. Enter a pulse width of 10 NS.

BSOLUTE

for trailing edge and

installed the transition times can be either 800 ps or 1.6 ns, trailing edge is equal to leading edge. The minimum transition times for the Agilent 81104A are 3 ns.

To set the level parameters as required:

1 Press the LEVELS softkey.

2 Enter an offset of 1.65 V and an amplitude of 3.30 V.

For the Agilent 81104A or 81110A with an 81105 module installed, the screen looks as follows.

For the Agilent 81110A with an 81112 module installed, the screen looks as follows.

Getting Started

SSSSeeeettttttttiiiinnnng

g UUUUp

p a

a PPPPuuuullllsssse

e SSSSiiiign

g g

p p

a a

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

gnaaaallll

e e

gngn

Getting Started

SSSSeeeett

ttiiiinnnng

g UUUUp a

p a PPPPuuuullllsssse

tttt

g g

p a p a

e SSSSiiiiggggna

nallll

e e

nana

PPPPrrrrooooggggrrrraaaammmmmmmmiiiing EEEExxxxaaaammmmpppplllleeee

ng ng

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

# Pulse stream operating mode is required, but as we start from a # default status it is not necessary to send a command for setting the # instrument into pulse stream operating mode. # Set the period to 20 ns, the pulse width to 10 ns, the leading edge to # 3 ns and the trailing edge to 5 ns. :PULSe:PERiod 20NS :PULSe:WIDTh1 10NS :PULSe:TRANsition1 3NS :PULSe:TRANsition1:TRAiling:AUTO OFF :PULSe:TRANsition1:TRAiling 5NS

NNNNOOOOTE

TE For Agilent 81110A with Agilent 81112A 3.8V/330 MHz output channel

TETE

installed the transitions can be selected either 800 ps or 1.6 ns. Leading and trailing edge are equal.

# Set the amplitude to 3.3 Volts, the offset to 1.65 Volts. :VOLTage1 3.3V :VOLTage1:OFFSet 1.65V

# Enable the output 1 and the complement output 1 (Agilent 81110A # with Agilent 81112A 3.8V/330 MHz output channel installed, only). :OUTPut1 ON :OUTPut1:COMPlement ON

Getting Started

SSSSeeeett

ttiiiinnnng

g UUUUp a

tttt

p a SSSSeeeerrrriiiiaaaal

g g

p a p a

l DDDDaaaatttta

l l

a SSSSttttrrrreeeeaaaam

a a

Setting Up a Serial Data Stream Signal

TTTTaaaask

sk Set up a continuous 24-bit long pattern signal with NRZ data output

sksk

format at 80 MBit/s and ECL output level. The pattern is 111001110011001001010010.

IIIInnnnssssttttrrrruc

ucttttiiiion

ucuc

onssss To set the

onon

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

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

Select CONTINUOUS PATTERN

Highlight RZ-P

operating mode and trigger mode

ULSES AT OUT

1 and select NRZ.

as required:

m SSSSiiiign

gnaaaallll

m m

gngn

To set the

Press the TIMING softkey to enter the Timing menu.

Switch ON the output 1.

Enter a frequency of 80 MH

timing parameters

as required:

Getting Started

SSSSeeeett

ttiiiinnnng

g UUUUp a

p a SSSSeeeerrrriiiiaaaal

tttt

g g

p a p a

NNNNOOOOTE

TE It is recommended to set the width for channel 2 to 6.250 ns to avoid a

TETE

l DDDDaaaatttta

l l

a SSSSttttrrrrea

eam

a a

eaea

m SSSSiiiiggggnnnnaaaallll

m m

parameter conflict when switching on this channel. The ‘-------’ in the output 1 width entry field relate to the NRZ data

output format selection.

To set the level parameters as required:

1 Press the LEVELS softkey to enter the Level menu. 2 Change Offset and Amplitude mode to ECL levels by selecting

ECL in the Modify Area.

NNNNOOOOTE

TE An Agilent 81110A with Agilent 81112A 3.8V/330 MHz output channels

TETE

installed has fixed 50 Ω source impedance and does not offer to adjust for a load impedance other than 50 Ω.

To set up the pattern as required:

1 Press the PATTERN softkey.

SSSSeeeett

ttiiiinnnng

tttt

g UUUUp a

p a SSSSeeeerrrriiiiaaaal

g g

p a p a

Getting Started

l DDDDaaaatttta

a SSSSttttrrrreeeeaaaam

l l

a a

m SSSSiiiign

gnaaaallll

m m

gngn

2 Move the entry focus to L

and enter a value of 24.

AST

3 Move the entry focus to the bit-editing window for CH1 and enter the

pattern 111001110011001001010010 by pressing the 0 or 1 key, respectively.

When entering the pattern the bit-editing window automatically moves one location to the right after each key stroke. By turning the knob counterclockwise you can move the bit-editing window back. The currently selected memory location is shown by A

NNNNOOOOTE

TE To get a stable display of the pattern stream on an oscilloscope set the

TETE

DDR

Strobe (STRB) and trigger the scope.

Getting Started

SSSSeeeett

ttiiiinnnng

g UUUUp a

p a SSSSeeeerrrriiiiaaaal

tttt

g g

p a p a

l DDDDaaaatttta

l l

a SSSSttttrrrrea

eam

a a

eaea

m SSSSiiiiggggnnnnaaaallll

m m

PPPPrrrrooooggggrrrraaaammmmmmmmiiiing

ng ng

EEEExxxxaaaammmmpppplllleeee

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 pattern mode and select NRZ data output format # for output 1. :DIGital:PATTern ON :DIGital:SIGNal1:FORMat NRZ

# For example the command to set NRZ data format for the optional # second channel is: # :DIGital:SIGNal2:FORMat NRZ # Define a pattern length of 24 bit and program the pattern: # ‘111001110011001001010010’. :TRIGger:COUNt 24 :DIGital:PATTern:DATA1 #224111001110011001001010010

# Set the frequency to 80 MHz, and output 2 width to 6.25 ns to avoid a # parameter conflict. :FREQuency 80MHZ :PULSe:WIDTh2 6.25NS

# Set the output voltage to fixed ECL levels. :VOLTage1:HIGH -0.85V :VOLTage1:LOW -1.8V

# Enable the output 1 and the complement output 1 (Agilent 81110A # with Agilent 81112A 3.8V/330 MHz output channel installed, only). :OUTPut1 ON :OUTPut1:COMPlement ON

Getting Started

SSSSeeeettttttttiiiing

ng UUUUp a

p an E

n Edg

ng ng

p ap a

n En E

dgeeee----DDDDiiiissssppppllllaaaace

dgdg

cemmmmeeeennnnt

cece

Setting Up an Edge-Displacement Signal

TTTTaaaask

sk Set up a continuous signal with one distorted pulse. The two channels

sksk

are added with NRZ (Non Return to Zero) at both outputs. The high level is 1 V, low level is 0 V. The delay of output 2 is 10 ns and the bit frequency is 30 MHz.

NNNNOOOOTE

TE For this example, both outputs and the channel addition feature are

TETE

required. Therefore, this type of signal can only be performed with Agilent 81104A and Agilent 81110A with Agilent 81111A 10V/165 MHz outputs.

t SSSSiiiign

gnaaaallll

t t

gngn

Getting Started

SSSSeeeett

ttiiiinnnng

g UUUUp an E

p an Eddddge

tttt

g g

p an Ep an E

IIIInnnnssssttttrrrruc

ucttttiiiion

onssss To set the operating mode and trigger mode as required:

ucuc

onon

ge----DDDDiiiissssppppllllaaaacccceeeemmmmeeeennnnt

gege

t SSSSiiiiggggna

nallll

t t

nana

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

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

3 Select CONTINUOUS PATTERN

4 Select NRZ-P

at Out 1 and NRZ-P

ULSES

at Out 2 using the

ULSES

MODIFY knob.

To set up the pattern as required:

1 Press the PATTERN softkey.

2 Set up the bit pattern as follows. Enter 8 for L

AST

3 Move to the bit-editing window for CH1 and enter pattern 10100010

for channel 1.

4 Move down to CH2 and select first address by turning the knob

counterclockwise.

5 Enter pattern 00001000 for channel 2.

SSSSeeeettttttttiiiing

To set the level parameters as required:

1 Press the LEVELS softkey. 2 Switch ON both channels.

ng UUUUp a

p an E

ng ng

p ap a

n Edg

dgeeee----DDDDiiiissssppppllllaaaace

n En E

dgdg

Getting Started

cemmmmeeeennnnt

t SSSSiiiign

cece

gnaaaallll

t t

gngn

3 Change S

EPARATE OUTPUTS

4 Set high level to 1.00 V and low level to 0.0

to A

DDED AT OUTPUT

V for both outputs.

To set the timing parameters as required:

1 Press the TIMING softkey.

2 Enter a frequency of 30 MH

and a delay of 10 NS for output 2.

3 Vary output 2 delay to displace the pulse as required.

Output 2 has additional 2.5 ns delay in channel addition mode. Also, the typical transition times are 5 ns.

4 Enter transitions of 5 ns for output 1 to achieve same transition time

shape in the added signal.

Getting Started

SSSSeeeett

ttiiiinnnng

g UUUUp an E

p an Eddddge

tttt

g g

p an Ep an E

NNNNOOOOTE

TE The ‘-------’ in the width entry fields relate to the NRZ data output

TETE

ge----DDDDiiiissssppppllllaaaacccceeeemmmmeeeennnnt

gege

format selection.

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

t SSSSiiiiggggna

nallll

t t

nana

SSSSeeeettttttttiiiing

ng UUUUp a

ng ng

p an E

n Edg

p ap a

n En E

Getting Started

dgeeee----DDDDiiiissssppppllllaaaace

dgdg

cemmmmeeeennnnt

cece

t SSSSiiiign

gnaaaallll

t t

gngn

PPPPrrrrooooggggrrrraaaammmmmmmmiiiing EEEExxxxaaaammmmpppplllleeee

ng ng

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.

NNNNOOOOTE

TE Two outputs and the channel addition feature are required for this

TETE

example. Therefore, this example can be performed by Agilent 81104A and Agilent 81110A with Agilent 81111A 10V/165 MHz outputs.

# 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 pattern mode and select NRZ data output format # for output 1 and output 2. :DIGital:PATTern ON :DIGital:SIGNal1:FORMat NRZ :DIGital:SIGNal2:FORMat NRZ

# Define a pattern length of 8 bit and program for channel 1 the pattern # 10100010, for the channel 2 the pattern 00001000, see manual step 3. :TRIGger:COUNt 8 :DIGital:PATTern:DATA1 #1810100010 :DIGital:PATTern:DATA2 #1800001000

# Set the frequency to 30 MHz, and a delay of 10 ns for output 2, the # transition times for output 1 to 5ns to have same transition time # shape as the added second channel, see comment in step 5. :FREQuency 30MHZ :PULSe:TRANsition1 5NS :PULSe:DELay2 10NS

# Set the output voltage to high level 1.0 Volts and low level to 0.0 Volts # for both channels. Then select channel addition mode, see manual # step 4. :VOLTage1:HIGH 1V :VOLTage1:LOW 0V :VOLTage2:HIGH 1V :VOLTage2:LOW 0V :CHANnel:MATH PLUS

# Enable the output 1 and the output 2. :OUTPut1 ON :OUTPut2 ON

Getting Started

SSSSeeeett

ttiiiinnnng

g UUUUp a

p a DDDDua

ual

l CCCClllloc

ock

tttt

g g

p a p a

uaua

l l

k SSSSiiiiggggnnnnaaaallllssss

ococ

k k

Setting Up a Dual Clock Signals

TTTTaaaask

sk Set up a Dual Clock Signal in pattern mode with NRZ (Non Return to

sksk

Zero) pulses, a period of 12.5 ns and a high level of 2.50 V and a low level of 0 V. Output 1 generates a clock signal that is half of the system clock. Output 2 divides the system clock by 8.

NNNNOOOOTE

TE For this example two outputs are required.

TETE

NNNNOOOOTE

TE With an additional dual channel instrument, multiples of these dual clock

TETE

signals can be set up following a similar procedure as follows. For example, with 8 dual channel units up to 16 different clocks can be generated.

IIIInnnnssssttttrrrruc

ucttttiiiion

ucuc

SSSSeeeettttttttiiiinnnng

g UUUUp a

p a DDDDuuuuaaaal

g g

p a p a

onssss To set the operating mode and trigger mode as required:

onon

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

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

Getting Started

l CCCClllloooocccck

k SSSSiiiign

l l

gnaaaallllssss

k k

gngn

3 Select P

ATTERN OF

with NRZ-PULSES AT OUT 1 & OUT 2.

To set up the pattern as required:

1 Press the PATTERN softkey.

2 Enter 8 for L

AST

3 Move to CH1, select Clock÷N, and press the ENTER key twice to get

a pattern for clock division by 2.

4 Move to CH2, select Clock÷N, and press ENTER key. Press 8 and

ENTER, to get a pattern for clock division by 8.

Getting Started

SSSSeeeett

ttiiiinnnng

g UUUUp a

p a DDDDua

tttt

g g

p a p a

ual

l CCCClllloc

ock

uaua

k SSSSiiiiggggnnnnaaaallllssss

l l

ococ

k k

To set the timing parameters as required:

1 Press the TIMING softkey.

2 Switch ON both outputs.

To set the levels parameters as required:

1 Press the LEVELS softkey.

2 Set high levels of 2.50 V and low levels of 0.0

Set the period to 12.5 NS.

V for both outputs.

NNNNOOOOTE

TE The TIMING and LEVELS screens for Agilent 81110A with

TETE

Agilent 81112A 3.8V/330 MHz outputs look different to the screens shown here. This instrument has no channel addition, fixed source impedance

of 50 Ω, assumes 50 Ω load impedance and has differential outputs.

Getting Started

SSSSeeeettttttttiiiinnnng

g UUUUp a

p a DDDDuuuuaaaal

g g

p a p a

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

l CCCClllloooocccck

l l

k SSSSiiiign

gnaaaallllssss

k k

gngn

Getting Started

SSSSeeeett

ttiiiinnnng

g UUUUp a

p a DDDDua

tttt

g g

p a p a

ual

uaua

l CCCClllloc

ock

l l

ococ

k SSSSiiiiggggnnnnaaaallllssss

k k

PPPPrrrrooooggggrrrraaaammmmmmmmiiiing

ng ng

EEEExxxxaaaammmmpppplllleeee

NNNNOOOOTE

TE A second channel is required.

TETE

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 pattern mode and select NRZ data output format # for output 1 and output2. :DIGital:PATTern ON :DIGital:SIGNa1l:FORMat NRZ :DIGital:SIGNal2:FORMat NRZ # Define a pattern length of 8 bit and program for channel 1 a pattern # with clock division by 2, for channel 2 a pattern with clock division # by 8. :TRIGger:COUNt 8 :DIGital:PATTern:PRESet1 2,8 :DIGital:PATTern:PRESet2 8,8

# Set the period to 12.5 ns. :PULSe:PERiod 12.5NS

# Set the output voltage to high level 2.5 Volts and low level to 0.0 Volts # for both channels. :VOLTage1:HIGH 2.5V :VOLTage1:LOW 0V :VOLTage2:HIGH 2.5V :VOLTage2:LOW 0V

# Enable the output 1 and the output 2. :OUTPut1 ON :OUTPut2 ON

# To enable the complement output 1 and the complement output 2 # (only Agilent 81110A with Agilent 81112A 10V/330 MHz outputs installed) # the following commands have to be included: :OUTPut1:COMPlement ON :OUTPut2:COMPlement ON

Getting Started

SSSSeeeett

ttiiiinnnng

g UUUUp a

p a BBBBuuuurrrrsssst

tttt

g g

p a p a

Setting Up a Burst Signal

TTTTaaaask

sk Set up a burst signal with a burst repetition of 5 µs. One signal should

sksk

have two pulses at the period 500 ns. The levels are 2Vpp amplitude and offset of 0V.

NNNNOOOOTE

TE For this example two outputs are required.

TETE

t SSSSiiiign

gnaaaallll

t t

gngn

IIIInnnnssssttttrrrruc

ucttttiiiion

ucuc

onssss To set the

onon

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

Press the MODE/TRG softkey to enter the Mode/Trigger screen. The internal PLL is used to trigger the startable internal oscillator.

The PLL defines the burst repetition, the oscillator generates the pulse period.

Move to CONTINUOUS and select TRIGGERED.

Move to PULSES and select BURST

Move down and set 5 - S O

operating mode and trigger mode

INGLE-PULSES AT OUT

as required:

1 and D

OUBLE-PULSES AT

Getting Started

SSSSeeeett

ttiiiinnnng

g UUUUp a

p a BBBBuuuurrrrsssst

tttt

g g

p a p a

t SSSSiiiiggggnnnnaaaallll

t t

6 Move down and select TRGD

: PLL → PER and set the burst

repetition to 5.000 µs.

To set the timing parameters as required:

1 Press the TIMING softkey.

2 Switch the output 1 and the output 2 ON. 3 Enter a pulse period of 500 ns. F

4 For output 1 enter a width of 100

the trailing edge to T

RAIL

E = L

, a leading edge of 3 ns and set

EAD

5 For output 2 enter a double pulse delay of 250

leading edge of 3

and set trailing edge to T

, a width of 100NS, a

RAIL

E=L

EAD

To set the level parameters as required:

1 Press the LEVELS softkey.

SSSSeeeett

ttiiiinnnng

tttt

g UUUUp a

g g

Getting Started

p a BBBBuuuurrrrsssst

p a p a

t SSSSiiiign

gnaaaallll

t t

gngn

2 Select S

EPARATE OUTPUTS

3 For Channel 1 choose an offset of 0.0

V and an amplitude of 2.00 V.

4 For Channel 2 choose an offset of 0.0 mV and an amplitude of 2.00 V.

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

Getting Started

SSSSeeeett

ttiiiinnnng

g UUUUp a

p a BBBBuuuurrrrsssst

tttt

g g

p a p a

t SSSSiiiiggggnnnnaaaallll

t t

PPPPrrrrooooggggrrrraaaammmmmmmmiiiing EEEExxxxaaaammmmpppplllleeee

ng ng

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.

NNNNOOOOTE

TE A second channel is required.

TETE

# 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 burst mode by selecting a burst count of 5. # Choose double pulses for output 2. Select triggered mode by selecting # PLL as the trigger source and set the burst repetition to 5 ms. :TRIGger:COUNt 5 # Set Burst mode with burst count of 5 :ARM:SOURce INT2 # Set Triggered mode with PLL as trigger source :ARM:PERiod 5US # Set burst repetition of 5 ms :PULSe:DOUBle2 ON # second channel generates double

# pulses per period # Set the period to 500 ns, for output 1 enter a width of 100 ns. For # output 2 set the double pulse to 250 ns and the width to 100 ns. All # edges set to 3 ns. :PULSe:PERiod 500NS :PULSe:WIDTh1 100NS :PULSe:TRANsition1 3NS :PULSe:WIDTh2 100NS :PULSe:DOUBle2 ON :PULSe:DOUBle2:DELay 250NS :PULSe:TRANsition2 3NS

# Set the output amplitude to 2 Volts and the offset to 0.0 Volts for both # channels. :VOLTage 2V :VOLTage2 2V

# Enable the output 1 and the output 2. :OUTPut ON :OUTPut2 ON

# To enable the complement output 1 and the complement output 2 # (only Agilent 81110A with Agilent 81112A 3.8V/330MHz Outputs installed) # the following commands have to be included: :OUTPut:COMPlement ON :OUTPut2:COMPlement ON

NNNNOOOOTE

TE For general information on using the 81110A/81104A and information on

TETE

3Using the 81110A/81104A

This chapter provides complete reference information for using the 81110A/81104A 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 107 provides details on the instruments warning and error messaging system.

the instruments hardkeys, please refer to Chapter 1 Introducing the

81110A/81104A Pulse and Pattern Generators on page 15.

NNNNOOOOTE

TE For information on using the 81110A/81104A via remote control, please

TETE

refer to the Reference Guide, part number 81110-91021.

Using the 81110A/81104A

TTTThe

he MMMMoooode

de////TTTTrrrriiiigg

ggeeeer

he he

dede

gggg

r SSSSccccrrrree

r r

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.

The following sections explain these combinations in more detail.

eennnn

eeee

➀

⑥

④

②

⑤

③

➀

Trigger Mode

②

Pulse Mode

③

Pulse Typ e

Using the 81110A/81104A

The

e MMMMod

ThTh

e e

odeeee////TTTTrrrriiiiggggggggeeeer

odod

r SSSSccccrrrreeeeeeeennnn

r r

In this screen you can set up the overall operating modes of the instrument.

CONTINUOUS TRIGGERED GATED EXT

PULSES BURST PATTERN PULSES BURST PATTERN PULSES BURST PATTERN

Single/Double RZ/NRZ Single/Double RZ/NRZ Single/Double RZ/NRZ

WIDTH

④

Length

int Osc

⑤

Period Source

⑥

Arming Source

TRIGGER OUT

STROBE OUT

int PLL CLK-IN

Not Used

PLL cannot be used as Pulse and Arming source at the same time

2-65536 2-16384 2-65536 2-16384 2-65536 2-16384

int Osc int PLL CLK-IN

↑ ↓

on 1st on last

Programmable

MAN-Key EXT INPUT

Not Used

MANKey EXT INPUT

PLL

Marks each pulse period generated

on1st

↑

on last

↓

Pulse Types

The following pulse types can be selected per output:

INGLE-PULSES

OUBLE-PULSES

Single pulse per period, delay parameter sets delay to leading edge from start of period.

Double pulse per period, double-delay parameter sets delay between leading edges of pulses.

Programmable

int Osc int PLL CLK-IN

MANKey EXT INPUT

Not Used

on 1st

↑

on last

↓

Programmable

MANKey EXT INPUT

Not Used

Using the 81110A/81104A

TTTThe

he MMMMoooode

de////TTTTrrrriiiigg

ggeeeer

he he

dede

gggg

r SSSSccccrrrree

r r

Pattern Formats

In pattern mode the pulse output formats can be selected from:

RZ A single pulse is generated in each pulse period

NRZ A leading edge is generated for a 0→1 data transi-

eennnn

eeee

with data value 1, no pulse is generated for data value 0.

tion, a trailing edge is generated for a 1→0 data

transition.

Using the 81110A/81104A

The

e MMMMod

odeeee////TTTTrrrriiiiggggggggeeeer

ThTh

e e

odod

Continuous Pulses Mode

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

r SSSSccccrrrreeeeeeeennnn

r r

CCCChhhhaaaarrrraaaacccctttteeeerrrriiiissssttttiiiiccccssss

Pulse periods are generated continuously



TRIGGER OUT marks each pulse period.



STROBE OUT not used in continuous pulse mode.



Using the 81110A/81104A

TTTThe

he MMMMoooode

de////TTTTrrrriiiigg

ggeeeer

he he

dede

gggg

r SSSSccccrrrree

r r

Continuous Burst Mode

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

eennnn

eeee

CCCChhhhaaaarrrraaaacccctttteeeerrrriiiissssttttiiiiccccssss

A burst of pulse periods is repeated continuously.



You can select the number of pulse periods per burst in the range of



265536.

TRIGGER OUT marks each pulse period.



STROBE OUT rises at the start of the first pulse period in a burst and



falls at the start of the last pulse period.

Using the 81110A/81104A

The

e MMMMod

odeeee////TTTTrrrriiiiggggggggeeeer

ThTh

e e

odod

Continuous Pattern Mode

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

r SSSSccccrrrreeeeeeeennnn

r r

CCCChhhhaaaarrrraaaacccctttteeeerrrriiiissssttttiiiiccccssss

A pattern of pulses is repeated continuously.



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



In the Pattern screen you can set the pattern length in the range 2



16 384 and program the data values for each output.

TRIGGER OUT marks each pulse period.



STROBE OUT is bit-programmable on the Pattern screen (NRZ



format only).

Using the 81110A/81104A

TTTThe

he MMMMoooode

de////TTTTrrrriiiigg

ggeeeer

he he

dede

gggg

r SSSSccccrrrree

r r

Triggered Pulses Mode

The following figure shows typical timings for trigger mode TRG'D BY and pulse mode PULSES.

eennnn

eeee

CCCChhhhaaaarrrraaaacccctttteeeerrrriiiissssttttiiiiccccssss

Single pulse periods are triggered by an active edge at the selected



arming source

MAN key on front panel, triggered by press or release or both.



EXT INPUT (External signal) triggered by rising or falling or both



edges.

TRIGGER OUT marks each pulse period.



Using the 81110A/81104A

The

e MMMMod

ThTh

e e

odeeee////TTTTrrrriiiiggggggggeeeer

odod

r SSSSccccrrrreeeeeeeennnn

r r

The following figure shows typical timings when the signal is triggered by both rising and falling edge of the arming source.

NNNNOOOOTE

TE The PLL cannot be selected as the arming source. Select continuous

TETE

pulses mode with the PLL as P

ERIOD SOURCE

to achieve the same result.

Using the 81110A/81104A

TTTThe

he MMMMoooode

de////TTTTrrrriiiigg

ggeeeer

he he

dede

gggg

r SSSSccccrrrree

r r

Triggered Burst Mode

The following figures show typical timings for trigger mode TRIGGERED and pulse mode BURST.

For the first example, the synchronously triggerable internal oscillator is used to source the period. The bursts are triggered by the rising edge of the arming source.

eennnn

eeee

CCCChhhhaaaarrrraaaacccctttteeeerrrriiiissssttttiiiiccccssss

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



arming source

MAN key on front panel, triggered by press or release or both.



EXT INPUT (External signal) triggered by rising or falling or both



edges.

PLL (Internally triggered bursts), select the triggering period.



You can select the number of pulse periods per burst in the range of



265536.

TRIGGER OUT marks each pulse period.



STROBE OUT rises at the start of the first pulse period in a burst and



falls at the start of the last pulse period.

Using the 81110A/81104A

The

e MMMMod

odeeee////TTTTrrrriiiiggggggggeeeer

ThTh

e e

odod

For the second example, either the internal PLL or an external CLK-IN are used to source the periodboth cannot be triggered synchronously.

NNNNOOOOTE

TE You cannot use the PLL as both pulse-period source and as arming

TETE

source at the same time.

r SSSSccccrrrreeeeeeeennnn

r r

Using the 81110A/81104A

TTTThe

he MMMMoooode

de////TTTTrrrriiiigg

ggeeeer

he he

dede

gggg

r SSSSccccrrrree

r r

Triggered Pattern Mode

The following figures show typical timings for trigger mode TRIGGERED and pulse mode PATTERN.

For the first example, the synchronously triggerable internal oscillator is used to source the period. The patterns are triggered by the rising edge of the arming source.

eennnn

eeee

CCCChhhhaaaarrrraaaacccctttteeeerrrriiiissssttttiiiiccccssss

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



arming source.

MAN K



EXT INPUT (External signal) triggered by rising, falling or both



edges.

PLL (Internally triggered patterns), select the triggering period.



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



On the Pattern screen you can set the pattern length in the range of 2



16384 and program the data values for each OUTPUT.

TRIGGER OUT marks each pulse period.



STROBE OUT is bit-programmable on the Pattern screen (NRZ



format only).

on front panel, triggered by press, release or both.

Using the 81110A/81104A

The

e MMMMod

odeeee////TTTTrrrriiiiggggggggeeeer

ThTh

e e

odod

For the second example, either the internal PLL or an external CLK-IN are used to source the periodboth cannot be triggered synchronously.

NNNNOOOOTE

TE You cannot use the PLL as both pulse-period source and arming source at

TETE

the same time.

r SSSSccccrrrreeeeeeeennnn

r r

Using the 81110A/81104A

TTTThe

he MMMMoooode

de////TTTTrrrriiiigg

ggeeeer

he he

dede

gggg

r SSSSccccrrrree

r r

Gated Pulses Mode

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

For the first example, the synchronously triggerable internal oscillator is used to source the period.

eennnn

eeee

CCCChhhhaaaarrrraaaacccctttteeeerrrriiiissssttttiiiiccccssss

Pulse periods are enabled by (G



selected arming source

MAN K



EXT INPUT (External signal) gated by high, low or both levels.



TRIGGER OUT marks each pulse period.



on front panel, gated while pressed or released or both.

ATED BY

) an active level at the

Using the 81110A/81104A

The

e MMMMod

odeeee////TTTTrrrriiiiggggggggeeeer

ThTh

e e

odod

For the second example, either the internal PLL or an external CLK-IN are used to source the periodboth cannot be triggered synchronously.

r SSSSccccrrrreeeeeeeennnn

r r

Using the 81110A/81104A

TTTThe

he MMMMoooode

de////TTTTrrrriiiigg

ggeeeer

he he

dede

gggg

r SSSSccccrrrree

r r

Gated Burst Mode

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

For the first example, the synchronously triggerable internal oscillator is used to source the period.

eennnn

eeee

CCCChhhhaaaarrrraaaacccctttteeeerrrriiiissssttttiiiiccccssss

Bursts of pulse periods are enabled by (G



the selected arming source:

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



EXT INPUT (External signal) gated while high or low or both.



You can select the number of pulse periods per burst in the range 2



65536.

TRIGGER OUT marks each pulse period.



STROBE OUT rises at the start of the first pulse period in a burst and



falls at the start of the last pulse period.

ATED BY

) an active level at

Using the 81110A/81104A

The

e MMMMod

odeeee////TTTTrrrriiiiggggggggeeeer

ThTh

e e

odod

For the second example, either the internal PLL or an external CLK-IN are used to source the periodboth cannot be triggered synchronously.

r SSSSccccrrrreeeeeeeennnn

r r

Gated Pattern Mode

With trigger mode GATED and pulse mode BURST the instrument shows the following characteristics:

A pattern of pulses is enabled by (G



selected arming source.

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



EXT INPUT (External signal) gated while high or low or both.



On the Pattern screen you can set the pattern length in the range of 2



16384 and program the data values for each output.

TRIGGER OUT marks each pulse period.



STROBE OUT is bit-programmable on the Pattern screen (NRZ



format only).

ATED BY

) an active level at the

Using the 81110A/81104A

TTTThe

he MMMMoooode

de////TTTTrrrriiiigg

ggeeeer

he he

dede

gggg

r SSSSccccrrrree

r r

External Width Mode

In external width mode, the pulse width is determined by an external

signal



eennnn

eeee

The pulse width is determined by an external signal:

MAN key: Pressing the key generates a leading edge, releasing the



key generates a trailing edge. EXT-IN: A rising-edge at the EXT INPUT generates a leading edge,

a falling edge at the EXT INPUT generates a trailing edge.

The threshold and impedance of the EXT INPUT can be selected on the Trigger-Level screen.

The period, delay, and width of the output pulse are not programmable in this mode as they are determined by the external signal.

Using the 81110A/81104A

The

e TTTTiiiimmmmiiiing

e e

ng SSSSccccrrrreeeeeeeennnn

ng ng

ThTh

The Timing Screen

To access the Timing screen press the TIMING softkey.

The Timing screen is only available if you have two channels fitted to your Agilent 81110A or Agilent 81104A mainframe and you have selected G

ROUP PARAMS BY

: TIMING/LEVELS on the Configuration screen.

NNNNOOOOTE

TE On screens of the Agilent 81110A with Agilent 81112A 3.8V/330 Mhz

TETE

outputs the second status output is displayed for differential outputs. The trailing edge is always coupled to the leading edge. The leading edge can be selected in the range from 0.8 ns and 1.6 ns.

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

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 (Group Params by) on page 104.

Using the 81110A/81104A

TTTThe

he TTTTiiiimmmmiiiinnnng

he he

g SSSSccccrrrree

eennnn

g g

eeee

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.

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

IDTH

to D

UTYCYCLE

, you must be in text mode

to select the parameter name with the cursor.

NNNNOOOOTE

TE With the 81110A/81104A you can sweep your timing values without

TETE

danger of spurious pulses or drop-outs that could cause measurement errors. This applies to continuous mode with timing values < 100 ms (frequency: < 10 Hz), and consecutive values between one-half and twice the previous value.

Pulse-Period Parameter

Using the 81110A/81104A

The

e TTTTiiiimmmmiiiing

e e

ng SSSSccccrrrreeeeeeeennnn

ng ng

ThTh

Set the pulse period as either P

NNNNOOOOTE

TE You can select the pulse-period source on the Mode/Trigger screen.

TETE

ERIOD

or F

REQUENCY

If you select the CLK IN connector as the pulse-period source, the pulse period/frequency is determined from the signal applied to CLK IN:

EAS ONCE

The external signal is measured once. Press ENTER to measure again.

EAS CONT

The external signal is measured continuously until the instrument receives a command via GP-IB. To invoke continuous measurements again you have to switch the instrument to local operating mode by pressing S

HIFT

+ L

OCAL

and start

continuous measurement again.

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

BSOLUTE

)

start of the leading edge of the pulse.

% (select % OF P



ELAY

ERIOD

)

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

Using the 81110A/81104A

TTTThe

he TTTTiiiimmmmiiiinnnng

he he

g SSSSccccrrrree

eennnn

g g

eeee

 P

HASE

(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).

Pulse Width Parameter

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

 W

 D

IDTH

(select W

IDTH

)

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.

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.

NNNNOOOOTE

TE You cannot have the width format set to D

TETE

edge format set to percentage of width (L time.

TYCYC

EADED

and the leading/trailing-

%/T

E%) at the same

RAIL

Using the 81110A/81104A

The

e TTTTiiiimmmmiiiing

e e

ng SSSSccccrrrreeeeeeeennnn

ng ng

ThTh

Pulse Trailing-Delay Parameter

The trailing delay is the absolute delay from the start of the pulse period 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.

Pulse Leading-Edge Parameter

Set the transition time for the leading edge of the pulse, measured from 10% to 90% of the pulse amplitude.

There are two formats available (selectable in text mode):



EADED

The absolute transition time measured from 10% to 90% of pulse amplitude. In this format the leading edge is independent of the pulse width.

Using the 81110A/81104A

TTTThe

he TTTTiiiimmmmiiiinnnng

he he

g SSSSccccrrrree

eennnn

g g

eeee

 L

EADED

The absolute transition time expressed as a percentage of pulse width. In this format if you adjust the pulse width, the transition time is adjusted to maintain the edge-time as a percentage of the width.

NNNNOOOOTE

TE You cannot have the width format set to D

TETE

edge format set to percentage of width (L

EAD

and the leading/trailing

TYCYC

ED%/T

E%) at the same

RAIL

time.

NNNNOOOOTE

TE The leading edge of an Agilent 81110A with Agilent 81112A 3.8 V/330 MHz

TETE

outputs can be selected from 0.8 ns or 1.6 ns.

Pulse Trailing Edge Parameter

Set the trailing-edge transition time of the pulse, measured from 10% to 90% of pulse amplitude.

There are three formats available, selectable in text mode:

 =L

 T

EAD

The trailing-edge transition time is coupled directly to the leading edge to maintain a symmetrical pulse.

RAILED

The absolute transition time measured from 10% to 90% of pulse amplitude. In this format the trailing edge is independent of the leading edge and pulse width.

 T

RAIL

The trailing-edge transition time expressed as a percentage of the pulse width. In this format if you adjust the pulse width, the transition time is adjusted to maintain the edge-time as a percentage of the width.

NNNNOOOOTE

TE Note that you cannot have the width format set to D

TETE

TYCYC

leading/trailing edge format set to percentage of width (L T

E%) at the same time.

RAIL

NNNNOOOOTE

TE The trailing edge of the Agilent 81110A with Agilent 81112A 3.8 V/

TETE

330 MHz outputs is always coupled to the leading edge.

and the

EADED

Using the 81110A/81104A

TTTThe

he LLLLeeeevvvveeeelllls

he he

s SSSSccccrrrreeeeeeeennnn

s s

The Levels Screen

To access the Levels screen press the LEVELS softkey.

The Levels screen is only available if you have two channels fitted to your Agilent 81110A or Agilent 81104A mainframe and you have selected G

ROUP PARAMS BY

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.

: TIMING/LEVELS on the Configuration screen.

Use the Levels screen to view and control the pulse-level parameter for both channels on one screen. If you have a single channel instrument both the timing and level parameters are displayed on the Output screen (see The Output Screens on page 106).

Using the 81110A/81104A

TTTThe

he LLLLeeeevvvveeeelllls

he he

s SSSSccccrrrreeeeeeeennnn

s s

Normal/Complement Parameter

Switch the OUTPUT between N

ORMAL

and C

OMPLEMENT

modes (in text

mode only).

ORMAL

Pulse leading edge rises from low to high level, trailing edge falls from high to low level.

OMPLMNT

Pulse leading edge falls from high to low level, trailing edge rises from low to high level

Separate/Added Outputs Parameter

NNNNOOOOTE

TE The channel add option is not available for the Agilent 81110A with

TETE

Agilent 81112A 3.8 V 330 MHz outputs installed. This parameter is only available in text mode, and if you have two output channels fitted.

Switch A



EPARATE OUTPUTS

Output 1 and output 2 operate as entirely separate output channels.



DDED AT OUTPUT

Output 1 and output 2 signals are added together at the output 1 connector. The output 2 connector is no longer used. You can use this mode to create complex pulse waveforms as shown in the figure below.

output mode on and off.

DDED

NNNNOOOOTE

TE By using the pattern mode you can code 3 or 4-level codes, or place spike

TETE

pulses from output 2 on particular data pulses on output 1, for example.

Using the 81110A/81104A

TTTThe

he LLLLeeeevvvveeeelllls

he he

Because output 2 is no longer used, its impedance parameters are no longer available, see figure below.

The Levels graphic page is also modified to indicate the multiple levels formed by outputs 1 and 2:

s SSSSccccrrrreeeeeeeennnn

s s

Using the 81110A/81104A

TTTThe

he LLLLeeeevvvveeeelllls

he he

s SSSSccccrrrreeeeeeeennnn

s s

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

NNNNOOOOTE

TE This parameter is only available in text mode.

TETE

IN VOLTS

or IN A

MPERES

Using the 81110A/81104A

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Output Source Impedance Parameter (50 Ω into)

An impedance of 50 Ω or 1 kΩ is selectable. There is no selection for the Agilent 81110A when fitted with Agilent 81112A 3.8 V 330 MHz output channels.

NNNNOOOOTE

TE This parameter is only available in text mode

TETE

Load Impedance Parameter (50.0Ω)

Adjust the load impedance value expected at the output to compensate for non-50Ω loads. The displayed level-parameters are then calculated using this value and therefore represent the levels at a non-50Ω static load.

Output Voltage and Power Protection

NNNNOOOOTE

TE When an output is switched on, the instrument monitors the actual

TETE

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.

s SSSSccccrrrreeeeeeeennnn

s s

The available output levels for an output could therefore be limited by external voltages, loads and the level settings of the other output if you are using a dual channel instrument with outputs added at output 1 (see Specifications).

NNNNOOOOTE

TE On the screen of the Agilent 81110A with Agilent 81112A 3.8 V/330 MHz

TETE

outputs installed the second output status is displayed for differential outputs. The instrument also assumes 50 Ω load impedance and there is no added outputs option available.

Using the 81110A/81104A

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The Pattern Screen

Use the Pattern screen to set up a pattern sequence to be generated by the instrument when you select the pattern mode on the Mode/Trigger screen.

To access the Pattern screen, press the PATTERN softkey.

When you press SHIFT + MORE (GRAPH) or the PATTERN softkey, you will see a graphical representation of the level parameters.

Using the 81110A/81104A

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Update Parameter

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

UPDATE (select U



The pattern data at the outputs are updated continuously as you edit the data on the screen.

NO UPD (select U



The pattern data at the outputs are not updated automatically from the screen. You can therefore modify the data patterns on the screen without affecting the pattern which is currently being generated at the Outputs.

Press ENTER to update the pattern once.

PD CONT

PD ONCE

)

Address Parameter

Adjust the address of the bit-editing window to scroll through the data. The figure in the following section shows the bit-editing window with the third bit in the pattern selected.

Last Parameter

Adjust the last bit number to set the length of the pattern in the range of 216384.

Using the 81110A/81104A

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Bit-Editing Window

Move the entry focus into the bit-editing window to edit individual data bits. The bit-editing window moves automatically one location to the right for each pattern entered.

While the entry focus is in the bit-edit window you can use the knob to scroll through the data.

RZ/NRZ Data Format

The data output format RZ or NRZ can be selected for the channels if not already done in the Mode/Trigger screen

Outputs (CH1,CH2) and Strobe Out (STRB)

Use the data entry keys to edit the data bit at the cursor:

0 set bit to 0, and move the bit-editing window to the next bit.



1 set bit to 1, and move the bit-editing window to the next bit.



+ / toggle bit without moving the bit-editing window.



Using the 81110A/81104A

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You can edit both output channels together in the BOTH pattern. This makes it easy to enter data for 3 or 4-level codes.

The following table shows the coding to be used when editing both output channels together.

n SSSSccccrrrreeeeeeeennnn

n n

CH1

CH2

OTH

0101 0011 0123

Block Editing Functions (CH1/CH2/BOTH/STRB)

Move the entry focus onto the CH1, CH2, BOTH or STRB at the left hand side of the screen to use the block editing functions.

Select the function using the MODIFY knob. Press ENTER confirm your selection.

Using the 81110A/81104A

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NNNNOOOOTE

TE Most of the block editing functions apply from (or at) the current address

TETE

n n

enen

in the bit-editing window to the last bit in the pattern.

The data memory is 16384 bits long. Bits beyond the last bit are not affected by the editing functions except when you insert or delete bits.

 F

 I

 F

 L

 I

ILL

Set all bits from A

ILL

Set all bits from A

NVERT

Invert all bits from A

IRST BIT

DDR

to L

DDR

inclusive to 0.

AST

inclusive to 1.

AST

to L

AST

inclusive.

Set the first bit to 1, and bits 2 to L

AST BIT

Set the L

NS BIT

Insert a bit at A A

, and bits A

DDR

The L

bit to 1, and all preceding bits to 0.

AST

. The bit value is copied from the current bit at

DDR

to 16384 are shifted right. Bit 16384 is lost.

DDR

parameter is not automatically incremented, so the length of

AST

to 0.

the generated pattern is not increased unless you adjust the L parameter yourself.

 Del Bit

Delete the bit at A

. All following bits are shifted left, bit 16 384 is

DDR

copied. The L

parameter is not automatically decremented, so the length

AST

of the generated pattern is not decreased unless you adjust the L parameter yourself.

AST

Using the 81110A/81104A

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 C

÷N

LOCK

Fill bits A

DDR

to L

with a divided clock pattern. After pressing

AST

ENTER you can adjust the dividing factor from 2 to 16384 and press ENTER again to implement.

n Sequence n Sequence

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

Note that the output signal is only a square wave if you are using NRZ data. You can see this best in graphics mode:

 PRBS 2

Fill bits A

-1

DDR

to L

with a 2n-1 Pseudo-random Binary Sequence.

AST

After pressing ENTER you can adjust n in the range 7 to 14 and press ENTER again to implement.

Using the 81110A/81104A

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Hints on Editing Pattern Data

The block editing functions, apart from Insert and Delete, do not affect data bits beyond the current L and L

Remember, however, that the L the pattern generated at the outputs.

Example

You are currently generating a 48-bit pattern on output 1 and now want to fill bits 10 to 20 with data value 1. On the Pattern screen:

bit. Therefore, you can use the A

AST

parameters to define the block of bits you want to edit.

AST

parameter also defines the length of

AST

DDR

If necessary, move the cursor to UPDATE and select U

PD ONCE

prevent the data edits from affecting the pattern currently being generated at the output.

If NO UPD is already selected or if it is not important if the pattern is disturbed during the editing, you can ignore this step.

Adjust A

Adjust L

DDR

AST

to 10.

to 20

If UPDATE is still active, the pattern at the output will now be automatically reduced to 20 bits in length.

Move the cursor to CH1 to access the block editing functions for

output 1.

Use the MODIFY knob to select F

Press ENTER to fill bits 10 to 20 with data value 1.

1 from the list of functions.

ILL

If UPDATE is still active, the pattern at the OUTPUT will now change automatically.

Adjust L

back to 48 to reset the pattern length to 48.

AST

If UPDATE is still active, the pattern at the OUTPUT will now be set to a length of 48 bits.

If necessary, move the cursor to NO UPD and press ENTER to update

the pattern being generated at the OUTPUT (or select U

PD CONT

Using the 81110A/81104A

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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 Limits screen press the LIMITS softkey. If this softkey is not displayed, press MORE.

After you switch on the limits, the pulse level parameters on the Levels/ Output screens cannot be adjusted outside the ranges specified on the Limits screen if the output is switched on. Note that because current and voltage limits apply, the available ranges of the impedance parameters are also affected.

When output limits are on, the limits are indicated on the LEVELS/ OUTPUT pages in graphics mode. The level bar is scaled accordingly:

Using the 81110A/81104A

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The Trigger-Level Screen

Use the Trigger-Level screen to:



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

enen

Set the triggering threshold and input impedance for the EXT INPUT connector.

Set the triggering threshold and input impedance for the CLK IN connector.

Set the output levels for the STROBE OUT and TRIGGER OUT connectors.

EXT-IN Parameter

Move the entry focus to EXT-IN to quickly set the triggering threshold of the external input connector (EXT INPUT) to a TTL or ECL compatible level.



TTL

Set the EXT INPUT threshold to +2.5V. To adjust the threshold, you can move the entry focus to the value.



ECL

Set the EXT INPUT threshold to 1.3V. To adjust the threshold, you can move the entry focus to the value.

Using the 81110A/81104A

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 V

OLTAGE

You can set any threshold level in the range of 10.0 V to +10.0 V. To adjust the threshold, you can move the entry focus to the value.

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l l

EXT-IN Impedance Parameter (50Ω/10kΩ)

Toggle the input impedance of the EXT INPUT connector between 50Ω and 10 kΩ.

CLK-IN Parameter

Move the entry focus to CLK-IN to quickly set the triggering threshold of the clock input connector (CLK IN) to a TTL or ECL-compatible level.

 S

 V

TTL

Set the CLK IN threshold to +2.5V. To adjust the threshold, you can move the entry focus to the value.

ECL

Set the CLK IN threshold to 1.3V. To adjust the threshold, you can move the entry focus to the value.

OLTAGE

You can set any threshold level in the range of 10.0 V to +10.0 V. To adjust the threshold, you can move the entry focus to the value.

CLK-IN Impedance Parameter (50Ω/10kΩ)

Toggle the input impedance of the CLK IN connector between 50 Ω and 10 kΩ.

TRIGGER-OUT Level Parameter

Select an output level (into 50 Ω) for the TRIGGER OUT connector according to the technology used at the output (TTL or ECL).

STROBE-OUT Level Parameter

Select an output level (into 50 Ω) for the STROBE OUT connector according to the technology used at the output (TTL or ECL).

Using the 81110A/81104A

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The Memory Card Screen

Use the Memory Card screen to:



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

enen

Store instrument settings to the memory card.

Recall instrument settings from the memory card.

Delete files from the memory card.

Format a memory card.

Using the 81110A/81104A

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Current Directory Parameter (Dir Path)

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Move the entry focus to DIR P

to change the directory on the memory

ATH

card or to view the subdirectories in the current directory (The current directory name is displayed next to D

IR PATH

All the sub-directories in the current directory are listed in the modify area.

NNNNOOOOTE

TE Settings from Agilent 81104A cannot be used in the Agilent 81110A or

TETE

vice versa.

To change directory:

Use the MODIFY knob to select the directory name from the list of

files and directories in the MODIFY window.

Press ENTER.

NNNNOOOOTE

TE Note that when you are in a sub-directory you can return to the parent-

TETE

directory by selecting .. from the directory list in the MODIFY window.

Using the 81110A/81104A

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Filename Parameter

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Move the entry focus to the F

ILENAME

parameter to view and select a file from the current directory. Use the MODIFY knob to scroll through the filenames listed in the MODIFY window.

Memory Card Operations

Move the entry focus onto P

ERFORM OPERATION

select the operation:



EADCARD

Read the DOS file-system information from the memory card after inserting a new card. Press ENTER to carry out the operation.



ECALL

Recall the selected file as the current-instrument setting. Press ENTER to carry out the operation.

and use the knob to

100

Agilent 81110A Getting Started

Specifications and Main Features

Frequently Asked Questions

User Manual

Notice

About this Book

Output Modules for 81104A Mainframe

Output Modules for 81110A Mainframe

Conventions Used in this Book

Safety Information

Safety

Warning

Safety Symbols

What you can do with the 81110A/81104A

Basic Features

Benchtop Testing

Automated Testing

Upgrade Capability

The Front Panel

Operating the 81110A/81104A

Switching On the Instrument

The Basic Screens

Adjusting Parameters

Standard Procedure

Advanced Procedures

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 Pulse Signal

Setting Up a Serial Data Stream Signal

Setting Up an Edge-Displacement Signal

Setting Up a Dual Clock Signals

Setting Up a Burst Signal

3Using the 81110A/81104A

The Mode/Trigger Screen

Overview

Pulse Types

Pattern Formats

Continuous Pulses Mode

Continuous Burst Mode

Continuous Pattern Mode

Triggered Pulses Mode

Triggered Burst Mode

Triggered Pattern Mode

Gated Pulses Mode

Gated Burst Mode

Gated Pattern Mode

External Width Mode

The Timing Screen

Pulse-Period Parameter

Pulse Delay Parameter

Pulse Width Parameter

Pulse Trailing-Delay Parameter

Pulse Leading-Edge Parameter

Pulse Trailing Edge Parameter

The Levels Screen

Normal/Complement Parameter

Separate/Added Outputs Parameter

Offset/Amplitude, High/Low Level Parameters

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

Output Voltage and Power Protection

The Pattern Screen

Update Parameter

Address Parameter

Last Parameter

Bit-Editing Window

RZ/NRZ Data Format

Outputs (CH1,CH2) and Strobe Out (STRB)

Block Editing Functions (CH1/CH2/BOTH/STRB)

Hints on Editing Pattern Data

Example

The Limits Screen

The Trigger-Level Screen

EXT-IN Parameter

CLK-IN Parameter

TRIGGER-OUT Level Parameter

STROBE-OUT Level Parameter