LeCroy 9450A User Manual

I

OPERATOR'S

MODEL 9450A
DUAL-CHANNEL
DIGITAL OSCILLOSCOPE

MANUAL

I

Serial Number
May 1992

LeCroy

Corporate Headquarters

700

Chestnut Ridge Road
Chestnut Ridge,
Tel:

[phone],

European Headquarters

2,

rue Pre-de-la-Fontaine
P.O. Box
121 7
Tel.:

341
Meyrin 1 /Geneva, Switzerland
(022) 71 9 21 11 , Telex:

NY

10977-6499

TWX:

710-577-2832

41 9 058

Copyrightm May
publication supersedes all earlier versions. Specifications subject to change.

1992,

LeCroy. Ail rights reserved. information in this

TABLE

OF

CONTENTS

8

Extended Pulse Parameters

Extended Parameters Display
Extended Parameters Setup
Extended Parameters List

9

The

Rear Panel

Mains Voltage Selection (67)
Fuse Protection
Power Switch (66)
Accessory Power Connectors (73)
GPIB and RS-232-C Port Selection
RS-232-C Connector (68)
Accessory Control (69)
BNC Connector (62)
External

Sampling CK Output (63)
Trigger Out (64)
Trigger Veto (65)
Reset (71)

CK

Input (62)

10 Getting Started

Waveform Acquisition

Saving and Recalling Front-Panel Setups

Storing and Recalling Waveforms

Waveform Expansion

Waveform Processing

Table of Contents

(70)

11 Getting More from your Oscilloscope

Rapid Response of the Front-Panel Controls

Accurate Amplitude Measurements

Accurate Time Measurements

Auto-Calibration

12 Waveform Processing Option (WPO1)

Processing Capabilities

Summed Average
Continuous Average

Arithmetic

Extrema

Functions

Enhanced Resolution

1

GENERAL INFORMATION

INITIAL INSPECTION

WARRANTY

It is recommended that the shipment be thoroughly inspected
mediately upon delivery to the purchaser. All material in the
container should be checked against the enclosed Packing List.
LeCroy cannot accept responsibility for shortages in comparison
with the Packing List unless notified promptly. If the shipment is
damaged in any way, please contact the Customer Service Depart­ment or local field

LeCroy warrants its oscilloscope products to operate within specifi­cations under normal use for a period of two years from the date of

shipment.

90

thought to be functional, but is
any kind covering detailed performance. Products not
tured by LeCroy are covered solely by the warranty of the original
equipment manufacturer.

In exercising this warranty, LeCroy will repair or, at its option,
replace any product returned to the Customer Service Department
or an authorized service facility within the warranty period, pro­vlded that the warrantor's examination discloses that the product
1s defectlve due to workmanship or materials and that the defect
has not been caused by
ditlons or operation.

The purchaser is responsible for transportation and insurance
charges for the return of products to the servicing facility. LeCroy
wlll return all in-warranty products with transportation prepaid.

This warranty 1s in lieu of all other warranties, expressed or im­plied,
merchantability, fitness, or adequacy for any particular purpose or
use. LeCroy shall not be liable for any speclal, Incidental, or con­sequential damages, whether in contract or otherwise.

Spares, replacement parts and repairs are warranted for

days. The instrument's firmware is thoroughly tested and

including

offlce immediately.

supplled "as is" with no warranty of

mlsuse, neglect, accident or abnormal con-

but not limited to any implied warranty of

im-

manufac-

PRODUCT ASSISTANCE

MAINTENANCE
AGREEMENTS

Answers to
of LeCroy equipment are available from the Customer Service
Department,
York
Pre-de-la-Fontaine,

(4 1)22/7 19 2 1 11,

LeCroy offers a selection of customer support services. Mainte­nance agreements provide extended warranty and allow the
customer to budget maintenance costs after the initial two year
warranty has expired. Other services such as installation, training,
enhancements and on-site repair are available through specific
Supplemental Support Agreements.

questions

700

10977-6499,

concerning installation, calibration, and use

Chestnut Ridge Road, Chestnut Ridge, New

U.S.A., tel.

1217

or your local field engineering office.

[phone],

Meyrin

1,

and

2,

rue du

Geneva, Switzerland, tel.

I

INTRODUCTION

ARCHITECTURE

Hi-Z,

50

Amplifiers
Attenuators

Cl

t

PRODUCT DESCRIPTION

The

LeCroy 9450A is a high-performance digital oscilloscope
suited to a wide variety of research, design and test applications. It
is used to capture, analyze, display and archive electrical

waveforms in fields such as electronic engineering, physics and
defense research, automated testing and measurement, telecom­munications, laser research, computer design, electromagnetic
pulse and interference measurement, lidar technology and ultra­sonics research.

9450A features two 400 megasamplelsecond 8-bit Flash

The
ADC systems, with 50K non-volatile memories for waveform ac­quisition and storage, and two 50K memories for waveform
processing, expansion and temporary storage. High-speed inter­nal data transfer and processing are performed using a
multi-processor system. The central processor is a powerful
Motorola 68020 microprocessor which performs computations
and controls the oscilloscope's operation.

Non-volat ile

RS-232-C

9450A

-

BLOCK

Figure

Time base

DIAGRAM

1

Display

Processor

t

64 KB Memory

v

GPlB

-

68020 Micro-

processor

16

MHY

4

68881

Reference
Memory

lOOK

Processing

lOOK

Memory

Real Time

Clock

Working Memory

KB

664

Program Memory

750 KB

TRIGGER

Product Descri~tion

Trigger Classes Operatlonal Modes

Single-source trigger Hold-off by time
Pattern trigger Hold-off by number of events

Pulse width
Pulse wldth < (FASTGLITCH)
Interval width
Interval width

>

>

<

7

State Qualified trigger Wait for a given time
TimelEvent Qualified trigger

TV trigger

additinn nerindir ralihratinn ic n~rfnrmed tn enciire lnno term

Wait for a given event count

Trigger on a given line in a
chosen field

atelv to the left and right of the CRT.

screen also presents internal status and measurement results, as

screen dump button. Plotting is done in parallel with normal

MANUALIREMOTE The

instantly on me nign

front-M an el

lavout and o~eration will be verv familiar to users

Product Description

2

Reference memories, C and
which can store one acquired and/or processed waveform, or up to
200 waveform segments.

Function memories E and F: Two
for waveform

Peak and Glitch Detection

Horizontal Section
Tlme Base Range: 1 nsecldiv to 5000 secldiv.

Acquisition

Modes

Minimum and maximum peaks, as fast as 0.002% of the record
length (minimum 2.5 nsec), are captured and

probability.

100%

Using LeCroy's FASTGLITCH trigger technique (see the trigger
section below), glitches faster than 2.5 nsec can be detected on all
time-base settings.

Clock accuracy:
Interpolator resolution: 5 psec.
Interpolator accuracy: 20 ps RMS
Sampling clock output: BNC connector on rear panel.
External clock in: BNC connector on rear panel.

Random Interleaved Sampling (RIS) for repetitive signals from

1 nsecldiv to

Single shot for transient signals and

10 nsecldiv to 200 msecldiv.

processing.

I

5

psecldiv.

f

D:

0.002%

Two 50K, 16-bit word memories

16-bit word memories

50K,

displayed

repetitive

with

signals from

Roll for slowly-changing signals from 500 msecldiv to
5000 sec/div.

Sequence mode divides the acquisition memory into 2, 5, 10, 20,

50,

100 or 200 segments.

Horizontal expansion: Dual zoom mode allows
or different sections of the same signal to be expanded up to 1000
times.

Pre-trigger recording: Adjustable in 0.2% increments to 100%
of full scale (grid width).

Post-trigger delay: Adjustable in 0.02 division increments up to

10,000 divisions.

External trigger input: 1 Ma, < 20 pF, 250 V max. (DC + peak
AC 10 kHz).

External trigger range:

f

2

V

in Ext, f 20 V in ExtIlO.

d~fferent signals

Display

Cursors

Remote Control

Probes

General

INSTALLATION

CAUTION

If a

LeCroy oscilloscope set for

into a

220

V

power source, severe damage can oc­cur. Before powering up the unit, ensure that the
correct mains voltage has been set.

11 5 V

is plugged

DISPLAY LAYOUT

I

Real-time clock field VI Abridged trigger fleld
II Menu field VII Abrldged front-panel status field
Ill Icon field Vlll Displayed trace field

IV Trigger delay field IX Message field
V Time and frequency field X Trigger level field

ICON

TRIGGER DELAY
FIELD (IV)

FIELD (111)

CH2

n

0.2

mV

DC

Trigger source: Channel
Trigger level:
Trigger coupling: DC

SPECIAL LeCROY TRIGGER GRAPHICS INDICATE the

SLOPE

and

LEVEL

of

Figure

0.2

mV

the TRIGGER

3

2

NJ

or

9U1W

TRIGER

EXAMPLE

of

MESSAGE FIELD DISPLAY

Figure

4

MANUAL

OPERATION

n

CHI

UQ

10mV

T/div

1V#

-

10

ps

DISPLAY

In

of

the ABRIDGED PANEL STATUS FIELD

\

VERTICAL SENSITIVITY PARAMETERS

Figure

I

I

CHI

n

SENSITIVITY DATA DISPLAYED

STATUS FIELD

and In

the DISPLAYED TRACE FIELD

Figure

5

I

I

52mVDC CH1>.1

In

the ABRIDGED PANEL

6

Chm

10ns>.l

CHZ

50

T/div

1

mV&

10

v

v

ns

=

-

Fixed Sensitivity Offset Range Voltage

2 V
1 V

0.5 V to 20 mV
10 mV

5

mV

f

5

f

lotimes

f

12 times

f

24 times

f

48 times

times

f

10 V

f

10V

f

6

V to f 240 mV

f

240 mV

f

240 mV

Main

Henu

.

A

Sampling

v

UPWARD- and DOWNWARD-POINTING, DOUBLE-SHAFT ARROWS

INDICATING that INPUT WAVEFORMS

Figure

7

v

are

OFF SCREEN

Modes

TIME BASE SAMPLING RATE DISPLAYED RECORD

TlMElDlV RIS SS RIS SS

1

nsec

2

nsec

5

nsec

10

nsec

20

nsec

50

nsec

0.1

psec

0.2

psec
psec

0.5

1

psec
psec

2

psec

5

psec

10

psec

20

psec

50

0.1

msec

0.2

msec

0.5

msec

1

msec

2

msec

msec

5

msec

10

msec

20

msec

50

sec

0.1

sec

0.2

0.5

sec

1

sec

2

sec

5

sec

10

sec

sec

20
50

sec

100

sec

sec

200

sec

500

1

ksec

ksec

2

ksec

5

TlMElPOlNT LENGTH (Polnts)

100
100
100

100
100
100

100
100
100
250
500

1

psec
psec
psec

psec
psec
psec

psec
psec
psec

psec
psec
nsec

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---

2.5

nsec

2.5

nsec

2.5

nsec

2.5

nsec

2.5

nsec

2.5

nsec

2.5

nsec

2.5

nsec

2.5

nsec

2.5

nsec

5

nsec

10

nsec

25

nsec

50

nsec

0.1

per

0.25

psec

0.5

psec

1

psec

2.5

psec

5

psec

10

psec

25

psec

50

psec

ROLL MODE

0.1

msec

0.25

msec

0.5

msec

1

msec

2.5

msec

5

msec

10

msec

25

msec

50

msec

0.1

sec

0.25

sec

0.5

sec

1

sec

100
200
500

1000 40
2000 80

5000 200
10000 400
20000 800
50000 2000

40000 4000
40000 8000
50000 20000

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40000
40000
50000

40000
40000
50000

40000
40000
50000
40000
40000
50000
40000
40000

50000
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40000
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