LeCroy WaveSurfer 400 Series User manual

LeCroy Color Digital Oscilloscopes
WaveSurfer 400 Series
Service Manual
Version A- September 2004
WAVESURFER-SM-E ECO 1

LeCroy Corporate Headquarters
700 Chestnut Ridge Road
Chestnut Ridge, NY 10977-6499
USA
Tel : [phone]
http://www.lecroy.com
LeCroy European Service
LeCroy SA
4, Rue Moïse Marcinhes
Case postale 341
1217 Meyrin 1
Geneva
Tel : [phone]
LeCroy Japan Service
LeCroy Japan Corporation
Sasazuka Center Bldg. – 6th floor,
1-6, 2-Chome, Sasazuka, Shibuya-ku
Tokyo Japan 151-0073
Tel. [phone]
© 2004 by LeCroy Corporation. All rights reserved.
LeCroy, ActiveDSO, ProBus, SMART Trigger, WavePro, WaveRunner and WaveSurfer are
registered trademarks of LeCroy Corporation. JitterTrack, WaveMaster, and X-Stream are
trademarks of LeCroy Corporation. Information in this publication supersedes all earlier
versions. Specifications subject to change without notice.

Table of Contents i
Read this first
Warranty 1-1
1. Warranty and Product Support 1-1
1.2 Product Assistance 1-1
1.3 Maintenance Agreements 1-1
1.4 Staying Up to Date 1-2
1.5 Service and Repair 1-2
1.6 How to return a Product 1-2
1.7 What Comes with Your Scope 1-2
General Information 2-1
2.1 Product Assistance 2-1
2.2 Installation for Safe and Efficient Operation 2-1
Operating Environment 2-1
Safety Symbols 2-1
Power Requirements 2-3
Cleaning and Maintenance 2-3
Power On 2-3
Specifications 3-1
3.1 Vertical 3-1
3.2 Triggering System 3-1
3.3 Standard Triggers 3-1
3.4 Optional SMART Triggers® 3-2
3.5 Documentation and Connectivity 3-2
3.6 Measure, Zoom, and Math Tools 3-3
3.7 Automatic Setup 3-3
3.8 Setup and Waveform Storage 3-3
3.9 Outputs 3-3
3.10 Environmental and Safety 3-4
3.11 Physical Dimensions 3-4
3.12 General 3-4
3.13 Warranty & Calibration 3-4

ii Table of Contents
Theory of Operation 4-1
4.1 System Block Diagram 4-1
4.2 Main Board 4-2
4.2.1 Front End 4-3
4.2.2 Analog to Digital Converter 4-5
4.2.3 Trigger 4-6
4.2.4 Time Base 4-9
4.2.5 Calibrator 4-10
4.2.6 Scan DAC 4-10
4.2.7 Main Board Control 4-10
4.3 Computer 4-11
4.3.1 Operating System 4-11
4.3.2 Memory 4-11
4.3.3 Interfaces 4-11
4.3.4 Storage Devices 4-11
4.3.5 Video port 4-11
4.4 PCI Card 4-12
4.4.1 PCI Interface 4-12
4.4.2 Local bus for acquisition 4-13
4.4.2.1 Control 4-13
4.4.2.2 Acquisition Data 4-13
4.4.3 Dallas OneWire Interface 4-13
4.4.4 Audio amplifire 4-13
4.5 Front Panel 4-13
4.5.1 Key board 4-14
4.5.2 Panel Board 4-14
4.5.2.1 Encoders 4-14
4.5.2.2 Touchscreen Interface 4-14
4.6 Display and Touchscreen 4-15
4.6.1 Color LCD Module 4-15
4.6.2 Backlight Inverter 4-15
4.6.3 Touch Screen 4-15
4.6.4 LVDS receiver 4-15
4.7 Power Supply 4-16
4.7.1 Input Voltages 4-16
4.7.2 Output Voltages 4-17
4.7.3 Basic Operation 4-17
4.7.3.1 Pre-converter 4-17
4.7.3.2 Main Converter 4-17
4.7.3.3 House Keeping Power Supply 4-17
4.7.3.4 +5VDIG and 3.3V DC/DC(Daughter Board) 4-17
4.7.3.5 +5VANA and 2.5V DC/DC (Daughter Board) 4-18
4.7.3.6 +9 and 12V DC/DC (Daughter Board) 4-18
4.7.3.7 -5V and –12V Forward converter 4-18
4.7.3.8 Filter Circuits (Daughter Boards) 4-18
4.7.4 Connector Assignments 4-18
4.7.5 Output Voltage Adjustment Range 4-21
4.7.6 +5VSB Standby Supply Rail 4-21

Theory of Operation
4.7.7 Control 4-21
4.7.7.1 Output Enable OUTPUT-EN/ (active low) 4-21
4.7.7.2 Line Frequency Synchronization Output Signal (LFS) 4-21
4.7.7.3 PWR_OK signal 4-21
4.7.8 Over-Current Protection 4-22
4.7.9 Over-Temperature Protection 4-22
4.7.10 Over-Voltage Protection 4-22
Theory of Operation - List of Figures
Figure 4-1 WaveSurfer Block Diagram 4-1
Figure 4-2 Acquisition Block Diagram 4-2
Figure 4-3 Front End Block Diagram 1 4-4
Figure 4-4 Front End Block Diagram 2 4-5
Figure 4-5 HAM631 System Architecture 4-5
Figure 4-6 Channel Mode 4-6
Figure 4-7 Trigger Block 4-8
Figure 4-8 Time Base Block Diagram 4-9
Figure 4-9 Calibrator Block Diagram 4-10
Figure 4-10 PCI Card Block Diagram 4-12
Figure 4-11 Front Panel Block Diagram 4-13
Figure 4-12 Display & Touchscreen Block Diagram 4-15
Figure 4-13 Power Supply Block Diagram 4-16
Table of Contents iii

iv Table of Contents
Performance Verification
5.1 Introduction 5-1
5.1.1 List of Tested Characteristics 5-1
5.1.2 Calibration Cycle 5-1
5.2 Test Equipment Required 5-2
5.2.1 Test Records 5-2
5.3 Turn On 5-2
5.4 Input Impedance 5-3
5.4.1 Channel Input Impedance 5-3
5.4.2 External Trigger Input Impedance 5-7
5.5 Leakage Current 5-9
5.5.1 Channel Leakage Current 5-9
5.5.2 External Trigger Leakage Current 5-12
5.6 Peak-Peak Noise Level 5-14
5.7 DC Accuracy 5-16
5.7.1 Positive DC Accuracy 5-16
5.7.2 Negative DC Accuracy 5-19
5.8 Offset Accuracy 5-20
5.8.1 Positive Offset Accuracy 5-20
5.8.2 Negative Offset Accuracy 5-22
5.9 Bandwidth 5-23
5.9.1 Description 5-23
5.10 Trigger Level 5-28
5.10.1 Description 5-28
5.10.2 Channel Trigger at 0 Division Threshold 5-28
5.10.3 Channel Trigger at +2.5 Divisions Threshold 5-31
5.10.4 Channel Trigger at −2.5 Divisions Threshold 5-32
5.11 Time Base Accuracy 5-34
5.11.1 Description 5-34
5.11.2 Clock Verification Procedure 5-34

Maintenance
6.1 Introduction 6-1
6.1.1 Safety Precautions 6-1
6.1.2 Anti-static Precautions 6-1
6.3 Software Update Procedure 6-2
6.3.1 Installing New X-Stream DSO Application Software 6-2
6.3.2 Software End User License Agreement 6-3
6.3.3 Installing Device Drivers 6-7
6.3.4 Restoring the Operating System 6-8
6.3.5 Software Options 6-12
6.3.5.1 Changing Software Option Key 6-12
6.4 Board Exchange Procedure 6-13
6.4.1 PCI Board Exchange Procedure 6-13
6.4.2 Hard Drive Replacement Procedure 6-13
6.4.2.1 Required items 6-13
6.4.2.2 Preparation of host machine 6-13
6.4.2.3 Copying necessary files to share them through network 6-14
6.4.2.4 Creating a network-ready startup disk 6-15
6.4.2.5 Updating the hard disk (through a network) 6-18
6.4.2.6 Setup at the first startup 6-20
6.4.2.7 Validating the software 6-22
6.4.2.8 Initialization of panel setup 6-22
6.4.2.9 BIOS setting 6-23
6.5 Battery Exchange Procedure 6-26
6.6 Update BIOS 6-26
6.7 Equipment and Spare Parts Recommended for Service 6-27
6.7.1 Test Equipment Required 6-27
6.7.2 WaveSurfer Spare Parts 6-27
6.8 Service Menu 6-28
6.8.1 Accessing Service Menu 6-28
6.8.2 Mainframe Tests 6-29
6.8.2.1 Front Panel Test 6-29
6.9 Calibration Procedures 6-31
6.9.1 System Power Supply Calibration Procedure 6-31
6.9.2 Touch Screen Calibration Procedure 6-33
6.9.3 Front/ACQ System Adjustments 6-35
6.9.3.1 Internal reference voltage adjustment 6-35
6.9.3.2 Front end adjustment 6-36
6.9.3.3 TDC adjustment 6-39
6.9.3.4 Trigger delay adjustment 6-39
6.9.3.5 Trigger hysteresis adjustment 6-40
6.9.3.6 Event trigger delay adjustment 6-40
6.9.3.7 Odd path adjustment 6-41
6.9.3.8 Trigger analog time adjustment 6-42
6.9.3.9 Adjustment of time difference between channels 6-44
6.9.3.10 Speaker volume adjustment 6-45
6.10 Troubleshooting and Flow Charts 6-45
6.10.1 Introduction 6-45
Table of Contents v

vi Table of Contents
Maintenance
6.10.2 Repair Level 6-45
6.10.3 Initial Troubleshooting 6-46
6.10.4 Power Supply Problem 6-48
6.10.5 No Display (Internal or External) 6-49
6.10.6 Internal Display Problem 6-51
6.10.7 Boot Up Sequence 6-52
6.10.8 Front Panel Controls or Touch Screen Does not Operate 6-53
6.10.9 Timebase Problem 6-57
6.10.10 Remote Control Problem 6-58
6.10.11 Vertical Accuracy Problem 6-59
6.10.12 Bandwidth Problem 6-60
6.10.13 Line Trigger Problem 6-61
Mechanical Parts & Removal
7.1 Over All Replaceable Parts 7-1
7.2 Over All Block Diagram 7-3
7.3 Disassembly Flow Charts 7-4
7.4 OUTER Replaceable Parts 7-5
7.5 REAR & SIDE Replaceable Parts 7-5
7.6 FRONT Panel Assy 7-9
7.7 FRONT Bezel Assy 7-14
7.8 FRAME Assy (MAIN, POWER & CPU BOARD) 7-15
7.9 Spare Parts 7-16

Read this First 1-1
1. Warranty and Product Support
It is recommended that you thoroughly inspect the contents of the oscilloscope
packaging immediately upon receipt. Check all contents against the packing
list/invoice copy shipped with the instrument. Unless LeCroy is notified promptly of any
missing or damaged item, responsibility for its replacement cannot be accepted.
Contact your nearest LeCroy Customer Service Center or national distributor
immediately (see chapter 2 for contact numbers).
1.1 Warranty
LeCroy warrants its oscilloscope products for normal use and operation within
specifications for a period of three years from the date of shipment. Calibration each
year is recommended to ensure in-spec. performance. Spares, replacement parts and
repairs are warranted for 90 days. The instrument's firmware has been thoroughly
tested and is thought to be functional, but is supplied without warranty of any kind
covering detailed performance. Products not made by LeCroy are covered solely by
the warranty of the original equipment manufacturer.
Under the LeCroy warranty, LeCroy will repair or, at its option, replace any product
returned within the warranty period to a LeCroy authorized service center. However,
this will be done only if the product is determined after examination by LeCroy to be
defective due to workmanship or materials, and not to have been caused by misuse,
neglect or accident, or by abnormal conditions or operation.
1.2 Product Assistance
Help on installation, calibration, andthe use of LeCroy equipment is available from the
LeCroy Customer Service Center in your country.
Note: This warranty replaces all other warranties, expressed or implied, including but
not limited to any implied warranty of merchantability, fitness, or adequacy for any
particular purpose or use. LeCroy shall not be liable for any special, incidental, or
consequential damages, whether in contract or otherwise. The client will be responsible
for the transportation and insurance charges for the return of products to the service
facility. LeCroy will return all products under warranty with transport prepaid.
1.3 Maintenance Agreements
LeCroy provides a variety of customer support services under Maintenance Agreements.
Such agreements give extended warranty and allow clients to budget maintenance costs
after the initial three-year warranty has expired. Other services such as installation,
training, enhancements, on-site repairs and calibrations are available through special
supplemental support agreements.

1-2 Read this First
1.4 Staying Up to Date
LeCroy is dedicated to offering state-of-the-art instruments, by continually refining and
improving the performance of LeCroy products. Because of the speed with which physical
modifications may be implemented, this manual and related documentation may not
agree in every detail with the products they describe. For example, there might be small
discrepancies in the values of components affecting pulse shape, timing or offset, and —
infrequently — minor logic changes. However, be assured the scope itself is in full order
and incorporates the most up-to-date circuitry. LeCroy frequently updates firmware and
software during servicing to improve scope performance, free of charge during
warranty. You will be kept informed of such changes, through new or revised manuals
and other publications.
Nevertheless, you should retain this, the original manual, for future reference to
your scope’s hardware specifications.
1.5 Service and Repair
Please return products requiring maintenance to the Customer Service Department in
your country or to an authorized service facility. The customer is responsible for
transportation charges to the factory, whereas all in-warranty products will be returned to
you with transportation prepaid. Outside the warranty period, you will need to provide us
with a purchase order number before we can repair your LeCroy product. You will be billed
for parts and labor related to the repair work, and for shipping.
1.6 How to return a Product
Contact the nearest LeCroy ServiceCenter or office to find out where to return the product.
All returned products should be identified by model and serial number. You should
describe the defect or failure,and provide your name and contact number. In the case of a
product returned to the factory, a Return Authorization Number (RAN) should be used.
Return shipments should be made prepaid. We cannot accept COD (Cash On
Delivery) or Collect Return shipments. We recommend air-freighting.
It is important that the RAN be clearly shown on the outside of the shipping package
for prompt redirection to the appropriate LeCroy department.
1.7 WhatComes withYour Scope
Refer to chapter 10 for a list of the items that ships standard with the different
configurations of this oscilloscope.
Note: Wherever possible, please use the original shipping carton. If a substitute
carton is used, it should be rigid and packed so that that the product is surrounded
b
y
a minimum of four inches or 10 cm of shock
-
absorbent material.

General Information 2-1
2. General Information
2.1 Product Assistance
Help on installation, calibration, and the use of LeCroy equipment is available from your
local LeCroy office, or from LeCroy’s
•Customer Care Center, 700 Chestnut Ridge Road, Chestnut Ridge,
New York 10977–6499, U.S.A., tel. [phone]
•European Service Center, 4, Rue Moïse Marcinhes, Case postale 341, 1217 Meyrin 1,
Geneva Switzerland, tel. [phone].
•LeCroy Japan Corporation, Sasazuka Center Bldg – 6th floor, 1-6, 2-Chome,
Sasazuka, Shibuya-ku, Tokyo Japan 151-0073, tel. [phone]
2.2 Installation for Safe and Efficient Operation
Operating Environment
The oscilloscope will operate to its specifications if the environment is maintained within
the following parameters:
Temperature................5 to 40 °C (41 to 104 °F) rated.
Humidity.......................Maximum relative humidity 80 % RH (non-condensing) for
temperatures up to 31 °C decreasing linearly to 50 % relative humidity
at 40 °C
Altitude.........................2000 m (6560 ft)
The oscilloscope has been qualified to the following EN61010-1 category:
Installation (Overvoltage) CategoryII
Pollution Degree.............................2
Safety Symbols
Where these symbols or indications appear on the front or rear panels, and in this
manual, they have the following meanings:

2-2 General Information
.............................CAUTION: Refer to accompanying documents (for Safety-related
information). See elsewhere in this manual wherever the symbol is
present,as indicated in the Table of Contents.
.............................CAUTION: Risk of electric shock
..............................On (Supply)
[Off (Supply)
.............................. Earth (Ground) Terminal
............................Protective Conductor Terminal
...............................Earth (Ground) Terminal on BNC Connectors
WARNING................... Denotes a hazard. If a WARNING is indicated on the instrument, do
not proceed until its conditions are understood and met.
WARNING
Any use of this instrument in a
manner not specified by the
manufacturer may impair the
instrument’s safety protection.
The oscilloscope has not been designed to make direct measurements on the human
body. Users who connect a LeCroy oscilloscope directly to a person do so at their own
risk.

Power Requirements
The oscilloscope operates from a 115 V (90 to 132 V) or 220 V (180 to 250 V) AC
power source at 45 Hz to 66 Hz. No voltage selection is required, since the instrument
automatically adapts to the line voltage present.
The power supply of the oscilloscope is protected against short-circuit and
overload by means of a 10.0 A/250 V AC, “T” rated fuses (size: 5 X 20 mm),
located above the mains plug. Disconnect the power cord before inspecting or
replacing a fuse. Open the fuse box by inserting a small screwdriver into the
slot and turning counter clockwise.
For continued fire protection at all line voltages, replace only with fuse of the
specified type and rating (T 10.0 A/250 V).
Maintain the ground line to avoid an electric shock.
None of the current-carrying conductors may exceed 250 V rms with respect to ground
potential. The oscilloscope is provided with a three-wire electrical cord containing a
three-terminal polarized plug for mains voltage and safety ground connection.
The plug's ground terminal is connected directly to the frame of the unit. For adequate
protection against electrical hazard, this plug must be inserted into a mating outlet
containing a safety ground contact.
CleaningAnd Maintenance
Maintenance and repairs should be carried out exclusively by a LeCroy technician
Cleaning should be limited to the exterior of the instrument only, using a damp, soft
cloth. Do not use chemicals or abrasive elements. Under no circumstances should
moisture be allowed to penetrate the oscilloscope. To avoid electric shocks, disconnect
the instrument from the power supply before cleaning.
CAUTION Risk of electrical shock:
No user serviceable parts
inside. Leave repair to
qualified personnel.
General Information 2-3

2-4 General Information
This page intentionally left blank

Specifications 3-1
3.Specifications
3.1 Vertical
WS424 WS422 WS434 WS432 WS454 WS452
Bandwidth (at probe tip) 200 MHz 350 MHz 500 MHz
Rise Time (typical) 1.75 ns 1 ns 750 ps
Input Channels 4 2 4 2 4 2
Display 10.4" Color flat-panel TFT-LCD, 800x600 SVGA, touch screen
Sample Rate (single-shot) 2 GS/s max (interleaved mode), 1 GS/s (all channels)
Sample Rate (RIS mode) 50 GS/s
Standard Record Length 500 kpts/Ch (interleaved mode), 250 kpts/Ch (all channels)
Maximum Record Length
(Optional)
2 Mpts/Ch (interleaved mode), 1 Mpts/Ch (all channels)
Standard Capture Time up to 250 µs at full sample rate
Maximum Capture Time
(Optional)
up to 1 ms at full sample rate
Vertical Resolution 8 bits
Vertical Sensitivity 1 mV/div - 10 V/div (1 MΩ); 1 mV/div - 2 V/div (50 Ω)
Vertical (DC Gain) Accuracy ±(1.5% + 0.5% of full scale)
BW Limit 20 MHz 20 MHz, 200 MHz
Maximum Input Voltage ±400 Vpk (CAT I), ±300 Vpk (CAT II)
Input Coupling AC, DC, GND (AC for 1 MΩonly)
Input Impedance 1 MΩ//16 pF, or 50 Ω+/-1%,
Probing System BNC or ProBus®
Probes One PP007 per channel (standard)
Time/div Range 1 ns - 1000 s/div 500 ps - 1000 s/div 200 ps - 1000 s/div
Roll mode from 200 ms/div - 1000 s/div
Timebase Accuracy 10 ppm
3.2 Triggering System
Trigger Modes Normal,Auto, Single, and Stop
Sources Any input channel, External, Ext/10, or line; slope and level unique to
each source (except for line trigger)
Trigger Coupling AC, DC, HF, HFRej, LFRej
Pre-trigger Delay 0 – 100% of full scale
Post-trigger Delay 0 – 10,000 divisions
Hold-off 2 ns to 20 s or 1 to 99,999,999 events
Internal Trigger Level Range ±5 div from center
External Trigger Range EXT/10 ±5 V; EXT ±500 mV
External Trigger Input Impedance 50 Ω, 1MΩ
3.3 Standard Triggers
Edge Triggers when signal meets slope (positive, negative, or Window) and
level condition
Glitch Triggers on positive or negative glitches with widths selectable from 2 ns
to 20 s or on intermittent faults. Includes exclusion mode (trigger on
intermittent faults by specifying the normal width period).
Width Triggers on positive or negative glitches with widths selectable from 2 ns
to 20 s or on intermittent faults. Includes exclusion mode (trigger on
intermittent faults by specifying the normal width period).
Logic (Pattern) Logic combination (AND,NAND, OR, NOR) of 5 inputs (4 channels and
external trigger input). Each source can be high, low, or don’t care.The
High and Low level can be selected independently.
TV-Composite Video Triggers selectable fields (1, 2, 4, or 8), Positive or Negative slope, for
NTSC, PAL, SECAM, or non-standard video (up to 1500 lines)

3.4 Optional SMART Triggers®
Runt Trigger on positive or negative runts defined by two voltage limits and
two time limits. Select between 2 ns and 20 ns. Includes exclusion mode
(trigger on intermittent faults by specifying the normal width period).
Slew Rate Trigger on edge rates. Select limits for dV, dt, and slope. Select edge
limits between 2 ns and 20 ns. Includes exclusion mode (trigger on
intermittent faults by specifying the normal width period).
Interval (Signal or Pattern) Triggers on a source if a given state (or transition edge) has occurred on
another source. Delay between sources is 2 ns to 20 s, or 1 to
99,999,999 events. Includes exclusion mode (trigger on intermittent
faults by specifying the normal width period).
Dropout Triggers if signal drops out for longer than selected time between 2 ns
and 20 s. Includes exclusion mode (trigger on intermittent faults by
specifying the normal width period).
Qualified (State or Edge) Triggers on any input source only if a defined state or edge occurred on
another input source. Delay between sources is 2 ns to 20 s, or 1 to
99,999,999 events. Includes exclusion mode (trigger on intermittent
faults by specifying the normal width period).
3.5 Documentation and Connectivity
Printing Connect to any WindowsXP-compatible printer. Load any standard
WindowsXP printer driver onto the unit as future needs require.
Email Configure the unit to send an email of a screen image in a variety of
formats using MAPI (i.e. through a default email program) or SMTP (no
additional program needed).
Waveform Memories Save waveform data as a reference trace to be compared to channels,
zooms, or math functions.
Waveform File Data Save waveform data in the following formats: Binary, ASCII,
Excel,Mathcad,MATLAB.
Screen Image Save a screen image to the internal hard drive, a user-supplied USB
memory stick, or any other peripheral connected to one of the three USB
2.0 ports. Image can be saved in a variety of formats, and with white or
black background.
Waveform Labeling (Annotation) Attach up to 10 labels to any combination of waveforms. Labels appear
on screen images.
Hardcopy Front Panel Button Configure the front panel Hardcopy button to send an email, save a
screen image, save waveform file data, and save to the clipboard.
Networking Standard 10/100Base-T Ethernet interface (RJ-45 connector). Connect
to any network using DHCP with automatically assigned IP address.
Remote Control Via LeCroy Remote Command Set (via Ethernet)
USB Ports 3 USB ports (one on front of instrument) support Windows compatible
devices
External Monitor Port Standard 15-pin D-Type female SVGA-compatible connector for external
color
Parallel Port 25-pin D-type female (Centronics)
Serial Port 9-pin D-type male (not for remote oscilloscope control)
Audio Port Mic Input, Line Input, Line Output
3-2 Specifications

Specifications 3-3
3.6 Measure, Zoom, and Math Tools
Standard Parameter
Measurement
Up to 6 of the following parameters can be calculated at one time on any
waveform: Amplitude,Area, Base (Low), Delay, Duty, Fall Time (90%-
10%), Fall Time (80%-20%),
Frequency,Maximum,Mean,Minimum,Overshoot+, Overshoot-, Period,
Peak-Peak, Rise Time (10%-90%), Rise Time (20%-80%), RMS, Skew,
Standard Deviation, Top (High), Width. Measurements may be gated.
Zooming Use front panel QuickZoom button, or use touch screen or mouse to
draw a box around the zoom area.
Standard Math Operators include Sum, Difference, Product, Ratio, and FFT (up to 25
kpts with power spectrum output and rectangular,VonHann, and FlatTop
windows). 1 math function may be defined at a time.
Extended Math (MathSurfer
Options)
Adds the following additional math functions: Absolute Value,Averaging
(summed and continuous), Derivative, Envelope, Enhanced Resolution
(to 11 bits), Floor, Integral, Invert, Reciprocal, Roof, Square, and Square
Root. Also adds chaining of two math functions, and rescaling to different
units.
3.7 Automatic Setup
Auto Setup Automatically sets timebase, trigger, and sensitivity to display a wide
range of repetitive signals.
Vertical Find Scale automatically sets the vertical sensitivity and offset for the selected
channel.
Analog Persistence When ON, persistence applied to all waveforms. Select analog or color-
graded. Variable saturation level, with aging time selectable from 500 ms
to infinity.
3.8 Setup and Waveform Storage
Front Panel and Instrument
Status
Save to the internal hard drive, over the network, or to a USB connected
peripheral device.
Waveform Traces Save to one of four internal memories with 16 bit resolution for
recall/comparison.
Waveform Data Save to the internal hard drive, over the network, or to a USB connected
peripheral device.
3.9 Outputs
Calibrator 1 KHz square wave or DC level; Select from -1.0 to +1.0 into 1 MΩ,
output on front panel test point and ground lug
Control Signals Rear Panel: TTL level, BNC output; Choice of trigger ready, trigger out, pass/fail
status. (output resistance 300 Ω±10%)

3.10 Environmental and Safety
Temperature (Operating) +5 °C to +40 °C
Temperature (Non-Operating) –20 °C to +60 °C
Humidity (Operating) 5% to 80% relative humidity (non-condensing) at <= 30 °C.Upper limit
derates to 55% relative humidity (non-condensing) at +40 °C.
Humidity (Non-Operating) 5% to 95% relative humidity (non-condensing) as tested per MIL–PRF–
28800F.
Altitude (Operating) up to 3048 m (10,000 ft) at up to 25 °C
Altitude (Non-Operating) up to 12,190 m (40,000 ft)
Vibration (Operating) Random vibration, 0.31 grms 5 Hz to 500 Hz, 15 minutes in each of three
orthogonal axes
Vibration (Non-Operating) Random vibration, 2.4 grms 5 Hz to 500 Hz, 15 minutes in each of three
orthogonal axes
Functional Shock 20 g peak, half sine, 11 ms pulse, 3 shocks (positive and negative) in
each of three orthogonal axes, 18 shocks total
Certification CE Approved, UL (Std. UL 3111-1) and cUL (Std. CSA C22.2 No. 1010-
1) listed. EMC Directive 89/336/EEC;
EN61326-1:1997+A1:1998+A2:2001. Low Voltage Directive 73/23/EEC;
EN 61010-1:2001 Product Safety (Installation Category II, Pollution
Degree 2, Protection Class 1)
3.11 Physical Dimensions
Dimensions (HxWxD) 260 mm x 340 mm x 152mm (10.25" x 13.4" x 6"). Excluding accessories
and projections.
Net Weight 6.8 kg (15 lbs). Excluding accessories.
3.12 General
Power (AC) 100–120 Vrms at 50/60/400 Hz; 200–240 Vrms at 50/60 Hz;Max.
Power Consumption: 170 VA
3.13 Warranty & Calibration
Warranty Three year warranty.
Calibration Calibration recommended yearly.
3-4 Specifications

Theory of Operation 4-1
4. Theory of Operation
4.1 System Block Diagram
Figure 4-1 WaveSurfer Block Diagram

4-2 Theory of Operation
4.2 Main Board
The main board is divided into the following sections:
•Front End
Based on high impedance buffer, variable gain amplifier and differential
amplifiers.
•Analog to Digital Converter
Based on the HAM631 and the relay switchyard to combine the input channels.
•Trigger
Based on the Hybrids HTR420 discriminator & MST429A smart trigger.
•Time Base
Based on the MCG426 clock generator & MTB411A controller.
•Calibrator
•SCAN DAC
•Main Board Control
MAIN BOARD
CONTROL
TDC
D0-7
AC Calibration
HTR420
32bit Bus
8bit Bus
Calibrator
D0-31
D24-31
HTR420
TIME BASE
D16-23
CH1
ADC
System
SCAN DAC
HTR420
D8-15
Zo=50ohms
CH1
FRONT
END
CH4
FRONT
END
Serial Bus
HTR420
CH3
FRONT
END
TRIGGER
PCI Card
CH2
FRONT
END
EXT
input
HTR420
DC Calibration
MAM633
Control
CH4
ADC
System
MST429A
PCI Bus
Time Base Control
CH3
ADC
System
MCG426
FPGA
MTB411A
Serial Bus
CH2
ADC
System
Trigger signal
uATX Board
Analog Control
Figure 4-2 Acquisition Block Diagram