LeCroy 9420 Oscilloscope
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Model:
9420
Date:
1992
Category:
Group:
Description:
Digital Oscilloscope
Information
INTRODUCTION
The LeCroy 9420 is a wide bandwidth digital Oscilloscope
suited to a variety of engineering design and test
applications. It is used to capture, analyze, display and
archive electrical waveforms in fields such as analog and
digital engineering, automated test and measurement,
telecommunication and electronics research.
9420 ARCHITECTURE
The 9420 features two 1.00 mega sample/second 8-bit Flash
ADC systems, two 5OK non-volatile memories for waveform
acquisition and storage, and an additional four 50K memories
for waveform processing 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.
All front-panel knobs and buttons are constantly monitored
by the internal processor, and front-panel setups are
rapidly reconfigured via the unit’s internal 16-bit bus.
Data are quickly processed according to the selected
frontpanel setups, and are transferred to the display memory
for direct waveform display or stored in the 9420’s
reference memories.
The 68020 controls the unit’s GFIB (IEEE-488) remote control
port, as well as the RS-232-C port which is used to directly
Interface the 9420 to a digital plotter, printer, remote
terminal or other slow-speed device.
ADCs AND MEMORIES
Each of the 9420’s two identical input channels is equipped
with a 00 megasample/second, 8—bit ADC and a 50 kiloword
acquisition memory (see Figure 4). This dual ADC
architecture ensures absolute amplitude and phase
correlation, maximum ADC performance for both single- and
dual-channel acquisition modes, large record lengths and
excellent time resolution.
The 9420’s two 5OK acquisition memories simplify transient
capture by providing very long waveform records that capture
waveforms even when trigger timing or signal speed is
uncertain. In addition, a special expansion facility
magnifies waveforms by up to 1000 times the selected
time-base speed.
The 9420 Oscilloscope is capable of acquiring and storing
repetitive signals at a Random Interleaved Sampling (RIS)
rate of 10 giga-samples/second. RIS is a high-precision,
digitizing technique that enables measurement of repetitive
signals to a bandwidth of 350 MHz with an effective sampling
interval of 100 psec and measurement resolution of 5 psec.
The 9420 assures precision measurements over its entire
range of operation.
TRIGGER
The 9420’s digitally-controlled trigger system offers an
extensive range of trigger capabilities. Front-panel and
menu controls let the user choose the appropriate trigger
function for the signal.
In the standard trigger mode the 9420’s front-panel controls
are used to select and set parameters such as pre- and
post-trigger recording, sequence and roll modes, in addition
to the Auto, Normal and Single (Hold) modes. The trigger
source can be line, external or either of the two inputs.
The coupling is selected from HF, AC, LF REJect, HF REJect
and DC and the slope from positive and negative.
The SMART trigger facility provides a complete range of
sophisticated and versatile trigger features. The following
trigger classes and operational modes are available:
AUTOMATIC CALIBRATION
The 9420 has an automatic calibration facility that ensures
overall vertical accuracy of db 2% of full scale and a
time-base interpolator accuracy of db 20 psec RMS for the
unit’s crystal-controlled time base.
The time base is calibrated each time the 94205s time-base
control is adjusted to a new Time/div setting; vertical gain
and offset calibration take place each time the front-panel
fixed gain control for either Chan 1 or Chan 2 is adjusted
to a new Volts/div setting. Both channels are also
calibrated each time the Bandwidth Limit button is pressed.
In addition, the 9420 performs periodic calibration to
ensure the long term stability at a particular setting.
DISPLAY
The 9420’s large 12.5 X 17.5 cm (5 X 7 inches) screen
displays waveforms with high resolution and serves as an
interactive, user-friendly Interface via a set of
pushbuttons located immediately to the left and right of the
CRT. The Oscilloscope displays up to four waveforms, while
simultaneously reporting the parameters controlling signal
acquisition. In addition, the screen presents internal
status and measurement results, as well as operational,
measurement, and waveform analysis menus.
A hard copy of the 9420’s screen is available via the unit’s
front-panel screen dump button. Plotting is done in parallel
with normal Oscilloscope operation.
Manual type:
User Manual
Pages:
216
Size:
7.64 Mbytes (8015294 Bytes)
Language:
english
Revision:
Manual ID:
Date:
1989 01 01
Quality:
Scanned document, all readable.
Upload date:
2018 07 14
MD5:
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Uploader:
irat
Downloads:
1587
Information
1 General Information
Initial Inspection 1
Warranty 1
Product Assistance 1
Maintenance Agreements 1
Documentation Discrepancies 2
Service Procedure 2
Return Procedure 2
2 9420 Product Description
Introduction 3
9420 Architecture 3
ADCs and Memories 4
Trigger 4
Automatic Calibration 5
Display 5
Manual/Remote Control 6
Specifications 6
3 9450 Product Description
Introduction 13
9450 Architecture 13
ADCs and Memories 14
Trigger 14
Automatic Calibration 15
Display 15
Manual/Remote Control 16
Specifications 16
4 Installation
Safety Information 23
Operating Voltage 23
Power On 23
5 Display Layout
Real Time Clock Field (I) 26
Menu Field (II) 26
Icon Field (III) 26
Trigger Delay Field (IV) 26
Time and Frequency Field (V) 26
Abridged Trigger Configuration Field (VI) 26
Abridged Front-panel Status Field (VII) 27
Displayed Trace Field (VIII) 27
Message Field (IX) 28
Trigger Level Indicator Fields (X) 28
6 Manual Operation
Vertical Controls 29
9420 Time-base Controls 32
9450 Time-base Controls 35
Probes 37
Bandwidth Limit 37
Trigger controls (Standard) 37
Displaying Traces 44
Display Control and Expansion 45
Standard Waveform Processing 49
Screen Adjustments 51
Cursors 51
Pulse Parameters 5 6
Remote Control and Interruption 63
Automatic Setup 63
Menu Field (II) Controls 63
Panel Status Menu 64
Memory Status Menu 66
Saving and Recall of Front-Panel Setups 72
Auxiliary Setups (6) 75
X Versus Y Display 82
Store Menu 85
Special Modes 86
7 The SMART Trigger
Introduction 89
Applications 89
Manipulating the SMART Trigger 97
Single-Source Trigger Modes 100
Multi-Source Trigger Modes 111
8 The Rear Panel
Mains Voltage Selection (60) 127
Fuse Protection 127
Power Switch (59) 127
Accessory Power Connectors (66) 127
GPIB and RS-232-C Port Selection (63) 128
RS-232-C Connector (61) 128
Accessory Control (62) 129
BNC Connectors 129
External CK Input 129
Sampling CK Output 129
Trigger Out 129
Trigger Veto 129
Reset (64) 130
9 Getting Started
Waveform Acquisition 131
Saving and Recalling Front-Panel Setups 144
Storing and Recalling Waveforms 145
Waveform Expansion 146
Waveform Processing 153
10 Getting More From Your 9420.50
Rapid Response of the Front-panel Controls 157
Accurate Amplitude Measurements 157
Accurate Time Measurements 158
Auto-Calibration 161
11 Waveform Processing Option (WP01)
Processing Capabilities 163
Summed Average 164
Continuous average 166 k
Arithmetic 168
Extrema 169
Functions 171
Enhanced Resolution 172
12 FFT Option (WP02)
Fourier Transform 185
FFT Power Average 188
Processing Facilities 189
Cursors 189
F FT Interruption (Abort) 189
F FT Algorithms 190
Examples of FFT Processing 193
FFT Glosssary 196
Error Messages 200
References 201
Manual type:
User Manual
Pages:
232
Size:
6.48 Mbytes (6799000 Bytes)
Language:
english
Revision:
Manual ID:
Date:
Quality:
Scanned document, all readable.
Upload date:
2015 09 13
MD5:
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Downloads:
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Information
REMOTE CONTROL MANUAL
1 General Information
Initial Inspection 1
Warranty 1
Product Assistance 1
Maintenance Agreements 1
Document Discrepancies 2
Service Procedure 2
Return Procedure 2
2 About Remote Control
GPIB Implementation Standard 3
Program Messages 3
Commands and Queries 4
Local and Remote State 5
Program Message Form 5
Command/Query Form 6
Response Message Form 9
3 GPIB Operation
GPIB Structure 11
Interface Capabilities 11
Addressing 12
GPIB Signals 12
IEEE 488.1 Standard Messages 13
Programming GPIB Transfers 15
Programming Service Requests 19
Instrument Polls 21
Driving a Hard-copy Device 25
4 RS-232-C Operation
Introduction 29
RS-232-C Pin Assignments 29
RS-232-C Configuration 30
Commands Simulating GPIB Commands 33
5 System Commands
Organization 35
Command Summary 35
Command Execution 37
Command Notation 37
6 Waveform Structure
Introduction 179
Logical Data Blocks of a Waveform 179
Inspect? Command 180
Waveform? Command 182
Waveform Command 187
More Control of Waveform Queries 188
High-speed Waveform Transfer 188
7 Status Registers
Overview of Status and Service Request Reporting 191
Status Byte Register (STB) 193
Standard Event Status Register (ESR) 194
Standard Event Status Enable Register (ESE) 195
Service Request Enable Register (SRE) 195
Parallel Poll Enable Register (PRE) 195
Internal State Change Status Register (INR) 195
Internal State Change Enable Register (INE) 196
Command Error Status Register (CMR) 196
Device Dependent Error Status Register (DDR) 196
Execution Error Status Register (EXR) 196
User Request Status Register (URR) 196
Appendix A
Example 1: Use of the Interactive GPIB Program ’IBIC’
Example 2: GPIB Program for IBM PC (High-level Function
Calls) Example 3: GPIB Program for IBM PC (Low-level
Function Calls)
Appendix B
The Waveform Template
Manual type:
User Manual
Pages:
232
Size:
6.46 Mbytes (6777070 Bytes)
Language:
english
Revision:
Manual ID:
Date:
1992 05 01
Quality:
Scanned document, all readable.
Upload date:
2021 01 07
MD5:
9d3816f6ea609f674f6bc8d38af4509f
Downloads:
1041
Information
REMOTE CONTROL MANUAL
General
Information
Initial Inspection
Warranty
Product Assistance
Maintenance Agreements
Document Discrepancies
Service Procedure
Return Procedure
2
About Remote Control
GPIB Implementation Standard
Program Messages
Commands and Queries
Local and Remote State
Program Message Form
Command/Query Form
Response Message Form
3
GPIB Operation
GPIB Structure
Interface Capabilities
Addressing
GPIB Signals
IEEE 488.1 Standard Messages
Programming GPIB Transfers
Programming Service Requests
Instrument Polls
Driving a Hard-copy Device
4
RS-232-C Operation
Introduction
RS-232-C Pin Assignments
RS-232-C Configuration
Commands Simulating
GPIB Commands
System Commands
Organization
Command Summary
Command Execution
Command Notation
6
Waveform Structure
Introduction
Logical Data Blocks of a Waveform
Inspect? Command
Waveform? Command
Waveform Command
More Control of Waveform Queries
High-speed Waveform Transfer
Status Registers
Overview of Status and Service Request Reporting
Status Byte Register (STB)
Standard Event Status Register (ESR)
Standard Event Status Enable Register (ESE)
Service Request Enable Register (SRE)
Parallel Poll Enable Register (PRE)
Internal State Change Status Register (INR)
Internal State Change Enable Register (INE)
Command Error Status Register (CMR)
Device Dependent Error Status Register (DDR)
Execution Error Status Register (EXR)
User Request Status Register (URR)
Appendix
A
Example 1: Use of the Interactive
GPIB Program ’IBIC’
Example 2: GPIB Program for IBM PC
(High-level Function Calls)
Example 3: GPIB Program for IBM PC
(Low-level Function Calls)
Appendix
B
The Waveform Template