Metrix DOX3104, DOX3304 User Manual

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Page 1

Digital Storage Oscilloscope SPO

«Sensitive Phosphor Oscilloscopes»

DOX3104

4-voies - 100 MHz - 2 GSPS - 28MPts

WaveGenerator - Serial Bus Decode

DOX3304

4-voies - 300 MHz - 2 GSPS - 28MPts

WaveGenerator - Serial Bus Decode

8-Channel Logic Analyzer

User’s Manual

Pôle Test et Mesure de CHAUVIN-ARNOUX

Analog Inputs

Digital Inputs

Arbitrary Generator

Interactive Menu buttons

LCD TFT 8″ 800 x 480

USB

Cal. 3V 1kHz

Control Front Panel ON/OFF

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Content

2 4-Channel SPO Digital Oscilloscopes

Content

General Instructions

Introduction .............................................................................. 6

Precautions and safety measures ............................................. 6

Symbols on instrument ............................................................. 7

Guarantee, Repair, Servicing .................................................... 7

Instrument Description

Front panel ............................................................................... 8

Rear panel ................................................................................ 9

User display interface ............................................................. 10

Menu and Control buttons ...................................................... 11

Front panel Inputs and Ouputs................................................ 13

Rear panel Connectors .......................................................... 13

Universal knob ........................................................................ 13

Getting Started

Function Checking .................................................................. 14

Probe ...................................................................................... 15

Probe compensation .............................................................. 16

Function Description

AUTO Config/Default Config .................................................................................................... 17

Auto Setup .............................................................................. 17

Default Configuration ............................................................. 18

I - Vertical System .................................................................................................................... 19

Channels CH1 - CH2 - CH3 - CH4 ............................................. 19

Channel configuration ............................................................ 20

Input coupling ........................................................................ 21

Bandwidth Limit ...................................................................... 21

Vertical Sensitivity .................................................................. 22

Probe Factor ........................................................................... 23

Invert function ........................................................................ 23

Input impedance ..................................................................... 24

Vertical Unit ............................................................................ 25

Vertical knobs ............................................................................................................... 26

Vertical Position knob ............................................................. 26

Vertical Sensitivity knob ......................................................... 26

Storing and Displaying Reference waveforms ............................................................... 27

REF Menu ............................................................................... 27

Mathematical Funstions ................................................................................................ 28

MATH Menu ............................................................................ 28

Mathematical operations ..................................................... 28

Fast Fourier Transform FFT .................................................... 29

FFT Menu ............................................................................ 29

How to use the FFT ............................................................. 29

Displaying the FFT spectrum .............................................. 30

Selecting the FFT window ................................................... 31

FFT : Vertical and Horizontal scales .................................. 32

Vertical and Horizontal Position .......................................... 32

Cursors Measurements ....................................................... 32

Amplitude .......................................................................... 32

Frequency .......................................................................... 33

FFT of « Cal 3V 1kHz » signal ............................................. 34

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Content

4-Channel SPO Digital Oscilloscopes 3

II - HORIZONTAL System ......................................................................................................... 35

Horizontal menu ..................................................................... 35

HORIZONTAL Pad ................................................................... 36

Horizontal Position ................................................................ 37

Time Base Coefficient S/div ................................................... 37

Horizontal Zoom .................................................................... 37

III - TRIGGER System ............................................................................................................... 38

Trigger Menu .......................................................................... 38

Tigger Source ......................................................................... 39

Trigger Type ........................................................................... 40

Edge .................................................................................. 40

Pulse ................................................................................. 41

Video ................................................................................ 43

Slope .................................................................................. 44

Window ............................................................................... 46

Interval ............................................................................... 47

DropOut .............................................................................. 48

Runt .................................................................................... 49

Pattern ................................................................................ 50

Serial 1-2 ............................................................................ 53

I2C ................................................................................... 53

SPI ................................................................................... 54

UART/RS232 .................................................................... 55

CAN ................................................................................. 56

LIN ................................................................................... 57

Trigger Coupling .................................................................... 58

Horizontal Position ................................................................. 58

Slope&Level ........................................................................... 58

Holdoff .................................................................................... 59

IV - ACQUISITION System ........................................................................................................ 61

Acquisition menu .................................................................... 61

Acquisition Configuration ................................................ 62

Acquisition modes .................................................................. 63

Normal ................................................................................ 63

Peak detect ........................................................................ 63

Average ............................................................................. 64

High Res ............................................................................ 64

Sequence ............................................................................ 65

Memory Depth setting ......................................................... 67

Time Base ............................................................................... 68

Under-Sampling - Aliasing ...................................................... 68

Sequence Mode ...................................................................... 70

Run/Stop, Single, Auto, Normal ............................................... 71

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Content

4 4-Channel SPO Digital Oscilloscopes

Content (cont’d)

V - Display System .................................................................................................................. 72

Display ................................................................................... 72

SPO : Color ON - Color Off ...................................................... 73

X-Y Format .............................................................................. 75

VI - Measurement System ........................................................................................................ 77

Scale measurements ............................................................... 78

Cursors measurement ............................................................ 77

Manual Cursors .......................... 77

Track Mode .......................... 79

Automatic measurements ....................................................... 81

Automatic Measurements menu .......................... 81

Voltage Measurements .......................... 81

Time Measurements .......................... 81

Delay Measurements ......................... 81

All Measurements .......................... 82

Measurement Types .......................... 83

VII - SAVE/RECALL System ..................................................................................................... 87

Save/Recall ........................................................................... 87

Saving Setup files in Internal

and External memory ......................... 89

Recall a Setup file ......................... 90

Rename a Setup file .......................... 91

Delete » a Setup file .......................... 91

Save/Recall Waveforms ......................................................... 92

Save/Recall Picture ............................................................... 95

Save .CSV file ....................................................................... 96

Recall Default Setup .............................................................. 98

VIII - UTILITY System ............................................................................................................. 101

Utility Menu ........................................................................... 101

Utility page 1/3 ................................................................... 102

Utility page 2/3 ................................................................... 103

Utility page 3/3 ................................................................... 105

System Status ...................................................................... 107

Language ............................................................................. 107

Print ...................................................................................... 108

Do Self Cal ........................................................................... 111

Do Self Test ......................................................................... 111

Screen Test ....................................................................... 111

Keyboard Test ................................................................... 112

LED Test .................................................................................... 112

Firmware Update .................................................................. 113

Pass/Fail .............................................................................. 113

History ................................................................................. 119

Options .......................................................................................... 122

Date/Time ............................................................................. 124

I/O ......................................................................................... 125

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Content

4-Channel SPO Digital Oscilloscopes 5

IX - Arbitrary Waveform Generator ............................................................................................. 126

Creating an arbitrary waveform with EasyWave ..................... 126

Auto-Calibrating the arbitrary waveform generator ............... 129

X - DECODE option for Decoding Serial Bus .............................................................................. 130

I2C serial bus ....................................................................... 130

Setting I2C Trigger .............................................................. 131

Decoding I2C ...................................................................... 134

Reading I2C decoding ......................................................... 135

SPI serial bus ....................................................................... 136

Setting SPI Trigger .............................................................. 138

Decoding SPI ...................................................................... 139

Reading SPI decoding ......................................................... 140

UART/RS232 serial bus ........................................................ 141

Setting UART/RS232 Trigger ............................................... 142

Decoding UART/RS232 ....................................................... 144

Reading UART/RS232 decoding .......................................... 145

CAN serial bus .................................................................... 146

Setting CAN Trigger ............................................................ 151

Decoding CAN .................................................................... 157

Reading CAN decoding ....................................................... 158

LIN serial bus ....................................................................... 157

Setting LIN Trigger ............................................................. 158

Decoding LIN ...................................................................... 159

Reading LIN decoding ......................................................... 160

XI - DIGITAL Option Logic Analyzer…………………………………………………………………………160

XII - Power Analysis Option.............…………………………………………………………………………167

XIII - Remote Control .......................…………………………………………………………………………172

Messages ...................................................................................................................................... 178

Help ..................................................................................... 178

Messages ............................................................................. 179

Diagnostic ............................................................................ 180

Technical Specifications ................................................................................................................ 181

Appendix ...................................................................................................................................... 188

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General Instructions

6 4-Channel SPO Digital Oscilloscopes

General Instructions

Introduction

You have just acquired a 4-channel SPO Digital oscilloscope:

 DOX3104, 4-channel, 100 MHz, 2 GSPS, 28Mpts, Arbitrary Waveform Generator,

Serial Bus Decode or

 DOX3304, 4-channel, 300 MHz, 2 GSPS, 28 Mpts, Arbitrary Waveform Generator,

Serial Bus Decode, 8-channel Logic Analyzer. This 2-4-channel oscilloscope provides a set of powerful features for a wide range of

applications such as production, education, maintenance, service, research and development.

Congratulations for your choice and thank you for your trust in the quality of our products.

This instrument conforms to safety standard NF EN 61010-1, single insulation, and relative to electronic measurement instruments. This is a class 1 device which must be connected to the protective earth by its power cord.

To obtain optimum service, read these instructions with care and comply with the precautions for use.

Failure to comply with these warnings and/or user instructions is liable to cause damage to equipment to the equipment and/or components. This could be dangerous to the user.

Précautions and safety measures

 This instrument has been designed for use:

- indoors,

- in a pollution degree 2 environment,

- at an altitude of less than 2000 m,

- at a temperature in the range of 0°C to 40°C

- at a relative humidity below 80 % up to 31°C.

 It can be used for measurements on 300V CAT I circuits and can be powered by a

300V CAT II network.

Définition of

installation

categories

Overvoltage Category l : Is applicable to instruments and equipment which are not intended to be connected to the mains supply. Because the available energy is very limited this category is normally not marked on the equipment. CAT I is for connection to circuits in which measures are taken to limit transient over-voltages to an appropriately low level. Examples: Protected electronic circuits. Overvoltage Category ll : is for equipment intended to be supplied from building wiring. It applies to both equipments plug-connected or permanently connected.

E.g.:Measurements on the network circuits of household appliances, portables tools and other similar appliances.

Overvoltage Category lll : is for equipment intended to be incorporated into the building wiring. Such equipment includes socket outlets, fuse panels, and some mains installation control equipment. E.g.: Measurements on distribution panels (including secondary

meters) circuits breakers, cabling including cables, busbars, junction boxes, disconnecting switches, power outlets in the fixed installation, and industrial appliances and other equipment, such as motors permanently connected to the fixed installation.

La catégorie de surtension lV : is for equipment installed at or near the origin of electrical supply to a building, between the building entrance and the main distribution board. Such equipment may include electricity tariff meters and primary overcurrent protection devices. E.g.: Measurements on systems installed before the main fuse or the

circuit breaker of the building’s installation.

before use

 Comply with environment and storage conditions.

during use

 Read carefully all the notes preceded by the symbol .  Connect the instrument to an outlet with a protective ground pin.  Be sure not to obstruct the aeration points.  As a safety measure, use only suitable cords and accessories supplied with the

instrument or type approved by the manufacturer.

 When the instrument is connected to the measurement circuits, never touch an

unused terminal.

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General Instructions

4-Channel SPO Digital Oscilloscopes 7

General Instructions (cont’d)

Symbols on instrument

Warning: Risk of danger. Refer to the operating manual to find out the nature of the potential hazards and the action necessary to avoid such hazards.

Selective sorting of waste for recycling electric and electronic materials. In accordance with the WEEE 2002/96/CE directive: must not be treated as household waste.

Earth symbol

On/Off switch

LAN symbol

USB symbol

Fuse symbol

European Conformity

Hazardous voltage

Alternative Current

Guarantee

This equipment is guaranteed for 3 years against any material defect or manufacturing faults, in conformity with the general conditions of sale. During this period, only the manufacturer may repair the equipment and it reserves the rigth to carry out repair or replacement of all or part of the equipment. If the equipment is returned to the manufacturer, forward transport is at the expense of the customer. The guarantee does not apply in the event of :

 Improper use of the equipment or by association with incompatible equipment  Modification of the equipment without the explicit authorization of the manufacturer

technical services

 Equipment repaired by a person not authorized by the manufacturer  Equipment used in a particular application not suitable for the device or not described

in the user manual

 Shock, fall or flooding.

Repair

For repairs under or out off warranty, please contact our nearest « CHAUVINARNOUX » sales office or our “ MANUMESURE” regional technical center , which will establish a feedback file and will communicate the procedure to be followed.

Contact information on our website : http://www.chauvin-arnoux.com or by phone at the following numbers: 02 31 64 51 43 (MANUMESURE Technical Center) 01 44 85 44 85 (Chauvin Arnoux). For repairs outside metropolitan France, return the instrument to our “Chauvin-Arnoux” local agency or distributor.

Servicing

 Turn the instrument off.  Clean it with a damp cloth and soap.  Never use abrasive products or solvents.  Dry it before any further use.

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Instrument Description

8 4-Channel SPO Digital Oscilloscopes

Instrument Description

Front Panel

No.

Description

No.

Description

Universal Knob

Trigger Control

Horizontal Controls

Common Functions Keys

Auto Setup

Vertical Controls

« Default » Configuration

Six menu buttons

Run/Stop

«Up » Menu button

Generator set button « Wave Gen »

On/Off button

« DECODE » set button

Analog Inputs BNCs

« Digital » set button

Logic Analyzer Inputs

« Math » set button

« USB Host » connector

« Ref» set button

Probe Adjust Output

Vertical Controls for (Decode/Digital/Math/Ref）

Arbitrary Waveform Generator Output

17 18 19 20 21 22

1 2 3 4 5 6 7

7 8

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Instrument Description

4-Channel SPO Digital Oscilloscopes 9

Instrument Description (cont’d)

Rear Panel

1. Handle

To transport the oscilloscope turn the handle uprigth.

2. EXT TRIG

External trig input BNC “EXT TRIG”.

3. « PASS/FAIL » output or trigger output « TRIG OUT » :

The oscilloscope delivers either a square signal whose frequency is the number of waveforms acquired per second (Aux Output=Trig Out) or the number of “Fail” tests (Aux Output = Pass/Fail).

4. LAN RJ45 connector for a remote control of the oscilloscope (VXI11).

5. USB Device USB connector for « PictBridge » printer (printer) or PC control (USBTMC).

6. Kensington Lock The Kensington cable is not supplied with the unit

7. Power cord connector The supply voltage range is 100-240 Vac, 45-440 Hz. Use the power cord supplied with the unit.

8. Fuse Slow blow fuse 5x20mm 250V, 1.25A.

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Instrument Description

10 4-Channel SPO Digital Oscilloscopes

Instrument Description (cont’d)

User display interface

Trigger status:

Arm: The oscilloscope is acquiring pre-trigger data. All triggers are ignored in this state. Ready: All pre-trigger data has been acquired and the oscilloscope is ready to accept a trigger event.

Trig’d: The oscilloscope has detected a trigger event and is acquiring the post-trigger data.

Stop: The oscilloscope has stopped acquiring waveform data. Auto: In trigger « Auto » mode, the oscilloscope refreshes the trace even in absence of a trigger event.

Time Base coefficient : S/div.

Indicates the horizontal trigger position relative to the screen center, use the horizontal Position knob to adjust it.

“Zoom” Time Base coefficient : S/div

Awg : High-Z Arbitrary waveform Generator output impedance: High-Z or 50Ω

USB flash plugged-in

Indicates whether the back USB option is set to : Computer or Printer

“back USB ” option is set to “Computer”

“back USB” option is set to “Printer”

Shows the Channel vertical position symbol

Shows the CHi active Menu (CH 1)

10.

Input Coupling symbol

11.

Indicates whether the bandwidth limit is « 20MHz » or « Full Bandwidth».

12.

Vertical Scale Adjust : « Coarse » or « Fine »

13.

Probe Factor Selection : .1X .2X .5X 10X 20X 50X 100X 200X 500X 1000X 2000X 5000X 10000X

14.

Input impedance : 1MΩ - 50Ω

15.

Next page Menu CHi (CANAL i)

16.

Display for each of the active channels: Channel number, Probe factor, Input Impedance, « B » for the 20MHz bandwidth limit if enabled, Input

Coupling, Vertical Sensitivity V/div

17.

Indicates the trigger type, the trigger source, the trigger slope, the trigger coupling and the trigger level in Volt.

18.

Indicates the sample rate and the current memory depth.

19.

Indicates the frequency of the trigger source signal (hardware counter)

1 2 3 4 5 6 7

19 18

10 11 12 13 14 15

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Instrument Description

4-Channel SPO Digital Oscilloscopes 11

20.

Indicates the date and time

Instrument Description (cont’d)

Menu and Control buttons and knobs

Channel

buttons

CH1, CH2,

CH3, CH4

Press the CH1 (or CH2 or CH3 or CH4) button to enable (ON) or disable (OFF) the channel and to open the CHi configuration menu. When the channel is “On” the button is lit.

Run/Stop

Run : The traces are refreshed continuously, Stop: acquisition is Stopped.

Note: In « Stop », use the S/div knob to zoom or compress the trace.

Auto Setup

Automatically sets the oscilloscope controls to produce a suitable display of the input signals.

Wave Gen

Press this button to enable the « Arbitrary Waveform Generator »

Horizontal Control

Trigger Control

Common Menu buttons

Vertical Control

Advanced

Functions

Arbitrary Generator

Submenu

buttons

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Instrument Description

12 4-Channel SPO Digital Oscilloscopes

Default

Press this button to reset the oscilloscope settings to the « Default » configuration

Decode

Press this button to enable and configure the serial bus « Decode » option

Math

Press this button to enable and configure the « MATH » function.

Digital

Press this button to enable and configure the 8 channel « Digital » bus option

Ref

Press this button to open the REF WAVE menu. Use this menu to Save or Recall reference waveforms (REFA REFB REFC REFD) in the internal memory. When a reference waveform is displayed the “Ref” button is lit.

Horiz

Press this button to open the horizontal menu to select the horizontal format : YT, XY or Roll.

Setup TRIG

Press this button to open the TRIGGER menu to select the trigger type : Edge, Slope, Pulse, Video, Window, Interval, DropOut, Runt, Pattern, Serial1, Serial 2 and to configure it.

50%

Push the « Level » knob to obtain a stable trace. The oscilloscope automatically sets the trigger level to be halfway between the minimum and maximum voltage level of the trigger source signal. This is particularly useful when the trigger source is a “non displayed” signal like “EXT TRIG”.

« Auto »

Press this button to enable the Auto mode. In this mode the traces are refreshed in the presence or absence of a trigger event.

Normal

Press this button to enable the Normal mode. In this mode the traces are refreshed only in the presence of a trigger event.

Single

Press this button to enable the « Single » mode trigger. In this mode the oscilloscope performs a single acquisition and then « STOP ».

Utility

Press this button to open the « Utility » menu. The utility menu allows to configure the oscilloscope options such as: Sound, Language, Printer, Date/Hour etc. The Utility menu allows to display the « System Status » and to update the firmware.

Display

Press this button to open the « Display » menu. The display menu allows to configure the display Type, Color, Grid, Persistence, Intensity, Brightness, etc..

Cursors

Press this button to open the « CURSORS » menu. Use the « Universal » knob to position the active cursor. The sliders are displayed after leaving the « CURSORS » menu (exept if mode = Off) but can not be adjusted.

Help

Press this button to open the access to the internal Help.

Press this button to open the « Print » menu. The back USB connector must be set on « Printer ».

Measure

Press this button to open the « MEASURE » menu.

Acquire

Press this button to open the « Acquire » menu. The Acquire menu allows to configure the sampling mode : Normal, Peak Detect, Average, High Resolution.

Save / Recall

Press this button to open the « Save/Recall » menu. This menu allows to Save (or Recall) “Setups” in the internal or external memory and “Pictures”, “Waveforms”, “CSV files” in external memory.

Soft Keys

Six soft keys and the « Up » key provide access to submenus.

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Instrument Description

4-Channel SPO Digital Oscilloscopes 13

Instrument Description (cont’d)

Input BNCs , Logic Analyzer Probe Connector, USB host, Probe adjust Output, Arbitrary Waveform Generator Output BNC

Channel input BNC : CH1, CH2, CH3, CH4

4 BNCs connectors for input signals.

Logic Analyzer

8-channel logic analyzer input connector

USB A

USB host connector

Cal Probe Adjust

Output

The « Cal » Output allows compensation of 1/10 attenuating probes.

Arbitrary Waveform

Generator Output

Arbitrary Waveform Generator BNC output

Rear Panel Connectors

 2 BNCs

 USB

Device

 LAN

Main

Supply Socket

1 Aux Output BNC :« PASS/FAIL OUT » or « TRIG OUT » according to setting

1 « EXT TRIG » BNC: External Trig Input

USB type B Connector : to connect the oscilloscope to a PC or to a « Pictbridge » printer

RJ45 Connector : to connect the oscilloscope to Ethernet LAN

Main Supply Input Connector

Universal Knob

You can use it with many functions, such as adjusting the holdoff time, moving cursors, setting the pulse width, setting the video line, adjusting X and Y masks when using the pass/fail function etc. The “Universal” knob allows to adjust the storage location of setups, waveforms, pictures when saving/recalling and to select menu options. When the “Universal” button is active the “Select LED” is lit.

Input BNCs

Logic Analyzer

USB A

Cal

AWG out

On/Off

Page 14

Getting started

14 4-Channel SPO Digital Oscilloscopes

Getting started

Verification of instrument operation

To check the operation of the oscilloscope, perform the following steps:

Steps

1. Turn on the oscilloscope. Press the « Default » button of the « RUN CONTROL » pad to load the

« default » configuration of the oscilloscope. Note : The default value for the attenuation compensation coefficient of the probe is 1X.

2. Switch the attenuation of the “probe” to the « 1X » position, plug it on CH1 and turn clockwise to block. Connect the probe tip and the ground alligator clip to the terminals “Cal 3V 1kHz” and “Ground” of the probe adjust output.

3. Press the "Auto Setup" button to display the “3Vpp, 1kHz” Cal square wave.

4. Press the "CH1" button to disable CH1. Then press the "CH2" button to enable CH2 and repeat steps 2 and 3 to display the Cal signal on CH2. Repeat the previous steps with the channels CH3 and CH4.

Cal Output : 3V 1kHz

GND

CH1 channel

« Default Setup »

Page 15

Getting started

4-Channel SPO Digital Oscilloscopes 15

Getting started (cont’d)

Oscilloscope Probe

A guard around the probe body protects fingers from electric shocks.

Before performing a measurement : Plug the probe in the “BNC” input of the oscilloscope and then connect the

alligator clip of the probe to the ground reference potential of the circuit under test.

Probe

Attenuation

The probes can have different attenuation factors that affect the vertical scale of the oscilloscope. Press the corresponding channel button (CH 1 or CH2 or CH3 or CH4), and select the factor that matches the attenuation factor of your probe.

Be sure that the attenuation switch on the probe matches the probe factor in the oscilloscope. The probes supplied with the oscilloscope have two attenuation coefficients : X1 et X10.

Note:

● To avoid electric shock when using the probe, keep fingers

behind the probe guard.

● To avoid electric shock when using the probe, do not touch the metal parts of the head of the probe when it is connected to a voltage source. Connect the probe to the oscilloscope input and then connect the probe ground lead to the ground reference of the “circuit under test “before performing any measurement.

Note : The default value of the probe factor is 1X.

Note : When the attenuation switch is in the X1 position, the probe limits the bandwidth of the oscilloscope to about 6MHz (depending on the characteristics of the probe ). To use the full bandwidth of the oscilloscope, be sure that the position of the probe switch is set to X10.

Page 16

Getting started

16 4-Channel SPO Digital Oscilloscopes

Getting Started (cont’d)

Probe Adjust

Warning : The DOX3000 series have a switchable input impedance: 1MΩ - 50Ω. When using a « 1/10 » probe of 10MΩ input impedance (= 9MΩ for the

probe + 1MΩ oscilloscope input) it is imperative to set the oscilloscope input impedance to 1MΩ. If we visualize the « Cal 3V 1kHz » signal with a 1/10

probe and the oscilloscope input impedance is set to 50Ω, we will see on the screen a near zero amplitude signal because instead of having an attenuation of 1/10, we have an attenuation of 1/180000 (50/9000050).

Manual method of compensating the frequency response of a « 1/10 » probe connected to one channel of the oscilloscope.

Operation Steps

1. Open the CH1 menu and set the Probe attenuation factor to 10X and the oscilloscope input impedance to 1MΩ. Set the probe switch to X10 and connect the probe to CH1. If you use the probe hook-tip, insure a proper connection by firmly inserting the tip onto the probe.

2. Attach the probe tip to the “Cal 3V 1kHz” output and the reference lead to the GND connector. Set CH1 « On » (button lit) and then press the "Auto Setup" button.

3. Check the shape of the displayed waveform :

Over Compensated Under Compensated Correctly Compensated

4. If necessary, adjust the probe variable capacitor with the supplied screwdriver to get a « Correctly Compensated » signal. Repeat when you connect the probe to a different channel or when using another probe.

Note : For more information consult the manual of the probes supplied with the oscilloscope.

Page 17

Functional Description

4-Channel SPO Digital Oscilloscopes 17

Functional Description

AUTO SETUP

Auto Setup

« Auto Setup » button on « RUN CONTROL” block

DOX3000 digital oscilloscopes have an « Auto Setup » function that configures automatically the device to produce a display adapted to the signals at the channel inputs.

After launching an “Auto Setup”, select, if necessary, the type of signal displayed among the four proposed : Several periods, One period, Rising or Falling edge at the center of the screen.

Auto Setup

Function

Option

Description

Multi-cycle

Autoset and displays several cycle signal.

Single-cycle

Autoset and displays single cycle signal.

Rising edge

Autoset and displays the Rising edge.

Falling edge

Autoset and displays the Falling edge.

Undo config.

The oscilloscope recalls the previous Setup.

The “Auto Setup” sets the trigger source and displays the channels according to the following criteria :

● If multiple channels have an input signal, channel with the lowest frequency

signal has the priority.

● If no channel is « On » and no signal is found, no channels are displayed.

● If one or more channels are « On » and no signal is found, only the « On »

channels remains active.

Page 18

Functional Description

18 4-Channel SPO Digital Oscilloscopes

Functional Description

AUTO SETUP (cont’d)

« Auto setup » function

Function

Value

Sampling Mode

unchanged

Display Format

Y-T

Display Type

Vectors

Input Coupling

AC Bandwidth limit

Unchanged

V/div

Set

V/div adjust

Coarse (séquence 1 2 5)

Invert Signal

unchanged

Horizontal Position

Centered

S/div

Set

Trigger Type

Edge

Trigger Source

Auto detection of the signals on the input channels and selection of the proper trigger source.

Trigger Slope

Rising

Trigger Mode

Auto

Trigger Coupling

Holdoff

unchanged

Trigger Level

Adjusted to 50%

« Default » Setup

The oscilloscope is set up for normal operation when it is shipped from the factory. This is the « Default Setup ». To recall this setup, press the « Default » button. Settings may change for options, buttons and controls when you press the « Default » button, refer to appendix B.

The « Default » setup does not change the following settings :

● Language option

● Saved reference waveform files

● Saved setup files

● Display settings

● Calibration data

Page 19

Functional Description

4-Channel SPO Digital Oscilloscopes 19

Functional Description

I - VERTICAL System

Vertical knobs and buttons allow to display waveforms and to modify sensitivity and vertical position.

Channels: CH1 CH2 CH3 CH4

page 1

Option

Value

Description

Coupling

DC AC GND

DC: passes the AC and DC components of the input signal. AC: blocks the DC component of the input signal and attenuates AC components below 10Hz. GND: disconnects the input signal.

Bandwidth limit

ON OFF

Limits the channel bandwidth to 20 MHz and reduces high frequency noise. Full bandwidth

Volts/Div

Coarse Fine

Selects the resolution of the Volts/div knob : « Coarse » : defines a 1-2-5 sequence. « Fine » : small steps continuous adjustement.

Probe

.1x, .2x, .5x,1x , 5x, 10x, 20x, 50x,100x, 200x, 500x, 1000x, 2000x, 5000x,10000x

Set to match the attenuation of the probe you are using to ensure correct vertical readouts.

Input Impedance

1MΩ 50Ω

Selects the channel input impedance. « 1MΩ » : for use with 10MΩ input impedance «1/10» probes. « 50Ω » : for use with 50Ω cable and 50Ω output impedance Generator to preserve impedance matching which is necessary when working with high frequency signals.

Page 1/2

To access page 2/2

page 2

Option

Values

Description

Unit

V A

Vertical unit : Volts or Ampères.

Invert

ON OFF

To invert the channel. To disable inversion.

Page 2/2

To access page 1/2.

CH1 CH2 CH3 CH4

buttons to open vertical menu and set channels

“on”

CH1 CH2 CH3 CH4

« Volt/div » knobs

CH1 CH2 CH3 CH4

Vertical « Position » knobs

Page 20

Functional Description

20 4-Channel SPO Digital Oscilloscopes

Functional Description

I - VERTICAL System (cont’d)

Setting up: CH1,CH2, CH3, CH4 channels

Press the CH1 (CH2, CH3 or CH4) button to open the corresponding channel

menu.

Selecting the

channel Input

Coupling

● Pressing “CH1” → “Coupling”→ “AC”, Set to AC the CH1 input coupling:

The DC component of input signal is blocked.

● Pressing “CH1”→ “Coupling”→ “DC”, Set to DC the CH1 input coupling:

Both DC and AC components of input signal pass.

● Pressing “CH1”→ “Coupling”→ “GND”, Set the input coupling to GROUND :

The input signal is disconnected.

The CH1 input signal is a positive square wave displayed with DC input coupling:

Proceed similarly to select the input coupling of CH2 - CH3 - CH4

Bandwidth

Limit

● Pressing “CH1”→“BW Limit”→ “20M” to enable the channel “Bandwidth Limit”.

The sinusoïdal signals (F> 20MHz ) are attenuated.

● Pressing “CH1”→ “BW Limit”→ “Off” disable the channel “Bandwidth Limit” :

The channel has « full » bandwidth.

DC Input

Coupling

Positive square wave

« 20M » channel BW limited to 20MHz

Page 21

Functional Description

4-Channel SPO Digital Oscilloscopes 21

Injecting a “<1ns” rise time “1MHz” square wave on channels CH1 and CH2 . The picture below shows a “1MHz” square wave displayed with the bandwidth limit

"20M" on CH2 and with the “full” bandwidth on CH1:

The measured rise time is 1.8ns on CH1 and 17.20ns on CH2, the presence of the

« bandwidth limit » on CH2 leads to a slower rise time.

Page 22

Functional Description

22 4-Channel SPO Digital Oscilloscopes

Functional Description

I - VERTICAL System (cont’d)

Adjusting

vertical

sensitivity V/div

Vertical scale adjusting has « Coarse » and « Fine » mode, vertical sensitivity range is 2mV/div to 10V/div.

For example, for CH1:

● Pressing “CH1”→ “Volts/Div”→ “Coarse”  sets “V/div” adjust to “coarse” default value.

Vertical sensitivity can be adjusted in a 1-2-5 sequence from 2mV/div, 5mV/div,

10mV/div to 10V/div.

● Pressing “CH1”→“Volts/Div”→ “Fine”  sets “V/div” adjust to “fine” This setting allows a continuous adjustement of the vertical sensitivity between coarse steps.

Note : Pressing the vertical sensitivity button also toggles the setting from

« Coarse » to « Fine ».

For example : Use the « Fine » vertical sensitivity adjust to determine the channel bandwidth when the bandwidth limit is « On »:

1° Set the bandwidth limit to 20MHz on CH2 and “Full” bandwidth on CH1 2° Inject on CH1 and CH2 the same “300mVpp, 1kHz” sinusoïdal signal 3° Adjust the CH1 vertical sensitivity to 50mV/div (coarse) and CH2 (Fine) to

35mV/div (35mV= 0.7x50mV).

Fine adjust sensitivity

Bandwidth Limit « 20M » on CH2

21.6MHz

50mV/div

35mV/div

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Functional Description

4-Channel SPO Digital Oscilloscopes 23

4° Increase the frequency of the generator to obtain a « 6 divisions amplitude » signal on both channels, the frequency measured by the oscilloscope (21.6MHz in our example) is the CH2 cutoff frequency with the bandwidth limit to 20M.

Probe

attenuation

factor

In the CHi menu, select the probe « factor » that matches the attenuation coefficient of the probe used.

To compensate an attenuation coefficient of 1/10, the probe factor must be set to 10X to integrate the attenuation coefficient of the probe in the vertical sensitivity.

For example if you are using a « 1/100 » probe, the probe factor must be set to 100X :

● Press “CH1”→ “Probe” → and select the “100X” factor

● Then the vertical sensitivity range will cover : 200mV/div to 1kV/div

Probe Factor “100X”

to compensate a “1/100” probe

Maximum sensitivity 1kV/div

Page 24

Functional Description

24 4-Channel SPO Digital Oscilloscopes

Functional Description

I - VERTICAL System (cont’d)

Inverting

Waveforms

For example, on CH1:

● Press “CH1”→ ″Page Suiv″ (″Next Page“) ″page 2/2” →“Invert”→“On”:

We show below, the same positive square wave on CH1 with invert « On » and on CH2 with invert « Off »

Input

Impedance

● Press “CH1”→ «Impedance »→ and select the channel input impedance

« 1MΩ » or « 50Ω ».

● 1MΩ input impedance is necessary when using 1/10 probes:

The “1MΩ” impedance allows to compensate the « 1/10 » probes by adjusting its variable capacitor :« 9MΩ//Var. Cap ».

The « 1MΩ » impedance is particularly well suited to « low frequency » and “high

voltage” signals.

● « 50Ω » impedance : for use with 50Ω cable and 50Ω output impedance Generators

to preserve impedance matching .

“50Ω » impedance is particularly well suited to « High Frequency » and « Low voltage » signals.

● In the example below we show a fast rising edge (<1ns) square wave on CH1 with

an impedance of 50Ω and 1MΩ 1° CH1 input impedance « 50Ω » :

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Functional Description

4-Channel SPO Digital Oscilloscopes 25

The rise time = 1.5ns and the amplitude = 286mV 2° CH1 input impedance « 1MΩ » :

The rise time = 2.2ns and the amplitude = 576mV (twice that obtain with « 50Ω ») Conclusion : The « 50Ω » input impedance is best suited to observe fast rising edge

waves provided by 50Ω output impedance generators.

Vertical Unit

V ou A

● Press “CH1”→ “Next Page page2/2”→ “Unit” → and select the vertical unit : Volt or Ampere.

Page 26

Functional Description

26 4-Channel SPO Digital Oscilloscopes

Functional Description

I - VERTICAL System (cont’d)

2. Vertical Knobs

Vertical Position knobs

1. Use the vertical "Position" knobs to move traces up and down the screen. The vertical position variation range is :

+ /- 1V for vertical sensitivities from 2mV/div to 100mV/div +/- 10V for vertical sensitivities from 102mV/div to 1V/div +/- 100V for vertical sensitivities from 1.02V/div to 10V/div

2. While you adjust the trace vertical position the ″Volts Pos=″ value is displayed on the screen.

3. Push the vertical “Position” knob to set the vertical position to zero (= screen center).

Vertical

Sensitivity

Volts/div

1. Use the “Volt/div” knob to adjust the vertical sensitivity. When you turn clockwise or counter-clockwise the sensitivity increases or decreases.

2. Push the “Volt/div” knob, to toogle between Coarse and Fine adjust. ″Coarse″ Vertical sensitivity can be adjusted in a 1-2-5 sequence from

2mV/div, 5mV/div, 10mV/div to 10V/div (12 steps).

″Fine″ a continuous adjustement of the vertical sensitivity from 2mV/div to

10V/div.

3. Save and Recall

Reference Waveform

The REF menu allows to save (or recall) reference waveforms in four internal memorie locations : REFA - REFB - REFC and REFD.

Press the « Ref » button to open the REF menu :

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Functional Description

4-Channel SPO Digital Oscilloscopes 27

REF Menu

Option

Value

Description

Source

CH1 CH2 CH3 CH4 Math

Select the waveform to save

REFA REFB REFC REFD

Select the REF memory location.

Save

Save the waveform in the selected memory location

REFA/REFB/ REFC/REFD

On Off

Recall and Display the selected REF. Clear the displayed REF waveform.

Operation Steps

1. Press the "Ref″ button to open the REF menu.

2. Press the "Source” button to select the reference source : CH1 or CH2 or

CH3 or CH4 or Math.

3. Use the “Position” and “V/div” knobs to set the vertical position and the

sensitivity to the proper values.

4. Press the ″REF A″ (or REF B or REFC or REFD) button to select the REF

memory location.

5. Press the « Save » button to save the REF waveform.

6. Select REF A (ou REF B ou REFC ou REFD) Display ″ON″ to display the REF

waveform

 The reference trace is dispayed in blue color.

Page 28

Functional Description

28 4-Channel SPO Digital Oscilloscopes

Functional Description

I - VERTICAL System / MATH Functions

Menu MATH

The « MATH » menu displays the results of mathematicals operations: +, -, *, /, FFT, d/dt, ∫dt and √ on channels CH1, CH2, CH3, CH4 and REFA, REFB, REFC, REFD waveforms.

Press the « Math » button to open the MATH menu.

MATH Menu

Fonction

Value

Description

Operation

+, -, *, FFT, d/dt, ∫dt and √

Select the mathematical function.

Source A Source B

CH1, CH2, CH3, CH4, REFA, REFB, REFC, REFD

Select the Math source Invert

On Off

Invert the MATH waveform. “Invert” is disable.

Vertical Position

Use the vertical « Position » knob to adjust the MATH waveform vertical position.

Vertical Scale

Use the « Variable » knob to adjust the MATH vertical scale.

Mathematical

operations

Opération

Value

Description

CHi+CHj

CHi added to CHj.

CHi-CHj

CHj subtracted from CHi.

CHi*CHj

CHi multiplied by CHj.

CHi/CHj

CHi divided by CHj.

FFT

Fast Fourier Transform.

d/dt

Derivative

∫dt

Integral

√

Square Root

Example of

Math function:

CH1+CH2

Page 29

Functional Description

4-Channel SPO Digital Oscilloscopes 29

Functional Description

I - VERTICAL System / MATH Funtion (Cont’d)

« Fast Fourier Transform »

The “Fast Fourier Transform « FFT » process” mathematically converts à time domain signal into its components in the frequency domain.

Two measurements are available on the FFT spectrum : Magnitude (in Vrms or dBVrms) and Frequency (in Hz).

Menu FFT

FFT Option

Setting

Description

Operation

FFT

Source

CH1, CH2, CH3, CH4, REFA, REFB, REFC, REFD

Select the FFT source channel.

Window

Hanning, Hamming Rectangulaire Blackman

Select the FFT window type. FFT ZOOM

1X, 2X 5X,10X

Changes the horizontal magnification of FFT display.

Vertical « Scale »

Vrms, dBVrms

FFT vertical scale

FFT « Display »

Split Full Screen

Displays the FFT spectrum on half screen Displays the FFT spectrum on full screen

How to use FFT

To use the FFT Math function, select the time domain signal source Y(t):

● Press « Auto Setup» button to display the Y(t) signal and select Multi cycles.

● Push the vertical “Position” knob to reset the vertical position to zero divisions

(screen center).

● Use the horizontal “Position” knob to position the Y(t) signal portion to be

analyzed with the FFT, in the center of the screen.

The oscilloscope calculates the FFT spectrum using the center 1024 points of

the time-domain waveform.

● Turn the “V/div” knob to ensure that the entire waveform remains on the

screen.

● Turn the “S/div” knob to provide the resolution you want in the FFT spectrum.

Operation Sequence

To display the FFT correctly:

1. Push the "Math" button.

2. Set the "Opération" option to « FFT ».

3. Press the "Source" button and select the channel "CH1" or "CH2" or "CH3"

or "CH4" or "REFA" or "REFB" or "REFC" or "REFD".

4. To comply with the Nyquist-Shanon theorem turn the "S/div" knob to adjust the

sampling rate (displayed on top rigth of the screen) at least twice the frequency of the input signal.

5. To determine the appropriate value for the “S/div” coefficient, compare the FFT

horizontal scale to the frequency displayed by the hardware counter, on the top rigth of the screen.

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Functional Description

30 4-Channel SPO Digital Oscilloscopes

Functional Description

I - VERTICAL System / MATH Function (cont’d)

2) Displaying the

FFT Spectrum

Press the « Math » button to display the MATH menu. Use the options to select: the Source channel, the Window, and the FFT Zoom Factor. You can display only one FFT spectrum at a time. You can select ″Full Screen" or "Split" in the Display option to display the waveform and its FFT spectrum on full screen, or the waveform and the FFT on half screen at a time.

With « Split » display and « Cursors » Off, you can display simultaneously: The entire Waveform, a Zoom portion and the FFT spectrum.

FFT Menu: Source - Window - FFT Zoom - Scale - Display

We inject on CH1 a sine wave: frequency = 21.7MHz and amplitude=896mVpp We will use the « Hanning » window to calculate the FFT, to determine the

frequency and the amplitude of the fundamental :

Using the “X1” manual cursor we can determine the frequency (X1=21.8MHz) of the fundamental

Page 31

Functional Description

4-Channel SPO Digital Oscilloscopes 31

And using the “Y1” manual cursor we can determine the amplitude (Vrms)

Y1=316mVrms ≈ (896mV/2)x0,707 = 316,7mVrms)

3) Selecting the

FFT window

The FFT window reduces spectral leakage in the FFT spectrum. The FFT assumes that the Y(t) waveform repeats indefinitely. With an integer number of cycles, the Y(t) waveform starts and ends at the same amplitude and there are no discontinuities in the signal shape. A non-integer number of cycles in the Y(t) waveform causes the signal start and end to be at different amplitudes. The transition between the start and end points causes discontinuities in the signal that introduce high frequency transients.

Window

Speciality

Adapted to

Rectangular

Best frequency resolution, worst magnitude resolution. This is essentially the same as no window.

Symmetric transients or bursts. Equal amplitude sine waves with fixed frequency. Broadband ramdon noise with relatively slowly varying spectrum.

Hanning Hamming

Better frequency resolution and poorer magnitude accuracy than Rectangular. Hamming has slightly better frequency resolution than Hanning.

Sine, periodic, and narrowband random noise. Asymmetric transient or bursts.

Blackman

Best magnitude and worst frequency resolution.

Single frequency waveforms, to find higher order harmonics

Page 32

Functional Description

32 4-Channel SPO Digital Oscilloscopes

Functional Description

I - VERTICAL System/ MATH Function (cont’d)

FFT:Vertical and Horizontal Scale, Vertical and Horizontal Position

You can magnify and use cursors to take measurements on the FFT spectrum. The oscilloscope includes an "FFT Zoom" option to magnify horizontally, press this button

to select : "1X", "2X", "5X", or "10X". The FFT spectrum can be moved horizontally using the horizontal « Position » knob. The FFT spectrum can be moved vertically using the Math « Vertical » knob. The Math « Variable » knob allows to adjust the FFT vertical scale.

5) Measuring the FFT

spectrum with Cursors

Two types of measurements are possible on the FFT spectrum : Amplitude : in dBVrms or Vrms and Frequency : in Hz

Amplitude

1. Input a sine wave to CH1 and press the "Auto Setup" button then select the “Multi cycles” option.

2. Press the "Math" button to open the "MATH" menu.

3. Press the "Opération" button and select "FFT"

4. Press the "Source" button and select "CH1"

5. Press the “CH1” button to open the CH1 menu.

6. Turn the "S/div" knob to adjust the sample rate (at least the double than the input signal frequency).

7. If the FFT display is on full screen, press CH1 button again to remove CH1 waveform from display.

8. Press the "Cursors" button to open the CURSORS menu.

9. Press the cursor “Mode” button and select “Manual”.

10. Select the « Yi » cursor type

11. Press the "Source" button and select "MATH"

12. Select the "Y1" cursor, and use the "Universal" knob to move “Y1” to the highest amplitude component of the FFT spectrum.

13. Select the "Y2" cursor, and use the "Universal" knob to move “Y2” to the lowest amplitude component of FFT spectrum.

14. The amplitude (∆V) displays on the top left of the screen.

In the following example we will consider a composite periodic signal : fundamental frequency 5MHz and 20MHz - 35.6MHz spectral components

The FFT displays the fundamental (F=5MHz Amplitude =2.66 Vrms) and two spectral components at 20MHz and 35.6MHz of Amplitude=0.4Vrms

Using Yi horizontal cursors to measure the amplitude of spectral components

Page 33

Functional Description

4-Channel SPO Digital Oscilloscopes 33

Functional Description

I - MATH Function (cont’d)

Measure

frequency with

« Xi » Vertical

Cursors

1. Press the « Cursors » button

2. Press cursor “Mode” button and select “Manual”.

3. Select "Xi" vertical cursor type

4. Press the "Source" button and select "MATH".

5. Select the "X1" cursor, and use the "Universal" knob to move “X1” to the highest amplitude component of the FFT spectrum.

6. The value ″X1=5.00MHz″ displayed on the top left of the screen is the frequency of the fundamental of the CH1 input signal.

Use vertical cursors to measure the frequency of the spectral components

Fundamental frequency X1=5MHz and the harmonic X2=35.6MHz

Frequency of the two harmonics: X1=20MHz and X2=35.6MHz

Page 34

Functional Description

34 4-Channel SPO Digital Oscilloscopes

FFT of « Cal 3V 1kHz »

1° Enter the « CAL 3V 1kHz » signal on CH4 with a 1/1 probe 2° Channel CH4 coupling = DC 3° Select 1.4Mpts memory depth and a 500ms/div Time Base 4° Select the FFT Math function with a « Blackman » window (highest

amplitude resolution) and FFT Zoom = « X10 » so that the horizontal scale is 1kHz/div.

5° Set the FFT vertical scale to Vrms 6° Use the manual cursors to measure the amplitude of the fundamental

(1kHz) and the first harmonic (3kHz) :

The fundamental (1kHz) amplitude is Y1=1.12Vrms (close to 1.06Vrms =

1.5V /1.414) Note : The « Cal 3V 1kHz » output provides a positive square wave, if the

input coupling is « DC » we observe a DC component in the FFT spectrum. Set the input coupling to « AC » to block the DC component of the « CAL 3V

1kHz » signal to obtain a FFT spectrum without DC component :

Warning : The presence of a DC component can hinder the observation of low-frequency components of the signal.

With FFT math function, the use of AC input coupling is recommended.

Page 35

Functional Description

4-Channel SPO Digital Oscilloscopes 35

Functional Description

II - HORIZONTAL System

HORIZONTAL Menu

The ″HORIZONTAL″ pad contains two buttons (Horiz and Zoom) and two knobs (S/div and Horizontal Position).

HORIZONTAL

« Horiz » button of the HORIZONTAL pad

Option

Setting

Description

Format

ROLL

«YT» : Displays the voltage (on the vertical axis) versus time (on the horizontal axis).

«XY» : To display in « XY » mode the two channel couples [CH1(X), CH2(Y)] and [CH3(X), CH4(Y)]

Time Base coefficient >100ms. The traces scroll from the right to the left of the screen as in a recorder, the “Roll” format is suitable for slow signals.

In « ROLL » there is no trigger or horizontal position control. Warning : When working with very low frequency signals

(<10Hz) the DC input coupling is not recommended.

ROLL mode

example

Note : The hardware frequency counter does not work for frequencies <10Hz

S/div knob

Horiz and Zoom menu buttons

Horizontal Positon knob

Page 36

Functional Description

36 4-Channel SPO Digital Oscilloscopes

Functional Description

II - HORIZONTAL System (cont’d)

HORIZONTAL pad

The “HORIZONTAL pad” knobs allow to adjust the Time Base coefficient « S/div » and the traces horizontal Position.

The two buttons allow to open the HORIZONTAL menu (“Horiz”) and to activate the “Zoom” function.

Horizontal

"POSITION" knob

1. Adjusts the trace horizontal position (the trigger position relative to the center of the screen). The time resolution of this command depends on the selected Time Base coefficient.

2. To reset to zero the horizontal position, push the ″Position″ knob.

S/div knob

1. Adjusts the Time Base coefficient. When the acquisition is stopped ( with “RUN/STOP” button or in “SINGLE” mode), turn the « S/div » knob to expand or compress the waveform.

2. « S/div » knob adjusts the coefficient of the « Main » or « Zoom » Time Bases. In Zoom mode, changing the Time Base coefficient (S/div) modifies the width of the « Zoom » window.

Horizontal Zoom

Use the horizontal “Zoom” function to define the portion of the waveform to be observed in details. The slowest « zoom » time base coefficient may not be lower than the “main” time base coefficient. Use the horizontal « Position » knob to move the « zoom window » position and the « S/div » knob to magnify or compress the “zoom window”.

"M" stands for « Main » time base, "Z" stands for “Zoom” time base. The vertical « blue » arrows indicate the horizontal position of the trigger

event in the Main time base and in the “Zoom” window. The horizontal « yellow » arrow indicate the vertical position of the trigger

level. Note: The display of the « Trigger Position » symbol in the “zoomed window” is

only possible if the position of the “zoomed window” includes the trigger event. If the trigger event is outside the “zoomed window” the horizontal blue arrow

indicates the direction in which to move the “zoomed window” to display the

trigger.

Page 37

Functional Description

4-Channel SPO Digital Oscilloscopes 37

Operation Steps

To display in details a portion of the waveform:

1. Press the "Horiz" button to open the HORIZONTAL menu.

2. Turn the "S/div" knob to adjust the main timebase.

3. Press the « Zoom » button to activate the horizontal Zoom.

4. Turn the « S/div » knob to adjust the “Zoom” time base.

5. Turn the horizontal "Position" knob to move the zoom window.

In the example below, we display in « Zoom » mode, a detail (a 0.24µs wide window with a resolution of 0.5ns situated at 235µs from the trig event) of a signal acquired at 2GSPS sample rate with a memory depth of 28Mpoints. The oscilloscope has recorded the evolution of the signal during a lapse of time of 14ms with an elementary time step of 0.5ns : The arrows indicates the delay value (Delay=235µs) relative to the trigger event and the signal value for this delay :

We can « Stop » the trace refresh (« Run/Stop » button) to observe it in detail. For example we can determine the value that the signal has 74ns before the trigger event by moving the zoomed window (Horizontal « Position » knob): The red arrows indicate the value of the signal at the trigger event and 74ns before :

Page 38

Functional Description

38 4-Channel SPO Digital Oscilloscopes

Functional Description

III - Trigger System

TRIGGER Menu

The DOX3000 oscilloscope series have a digital trigger system that has the following advantages:

Precise Trigger - Low « Jitter » - High Sensitivity Precise Trigger timing < 1ns - Configurable noise reject High stability with temperature

A hardware counter allows to display the frequency of the trigger source signal in the top right of the screen

The « Setup » button gives access to the « Trigger » setting menu.

The trigger symbol indicates when the “trigger event” has occurred. The “trigger event” divides the acquisition memory in two parts:

- The « Pre-Trig Buffer » before the trigger event and

- The « Post-Trig Buffer » after the trigger event

The DOX3000 oscilloscope series have eleven trigger modes: Edge, Slope, Pulse, Video (HDTV), Window, Interval, Dropout, Runt, Pattern, Serial 1, Serial 2 (Serial bus: I2C, UART, SPI, CAN, LIN)

TRIGGER pad

 « Setup » :Press the « Setup » button to open the TRIGGER menu.  “Level” knob: Use the LEVEL knob to adjust the trigger level. Push the

"Level" knob to set the trigger level to 50% of the peak to peak amplitude of the signal. This function is very useful in “Single” or “Normal” trigger modes.

 “Auto” button : The waveform is refreshed even in the absence of a trigger

event.

 « Normal » button: in « Normal » mode the trace is refreshed only if a

trigger event occur.

«Level» knob push to force level to 50%

« Setup » button for Trigger setting

« Single » button

« Auto » button

« Normal » button

Page 39

Functional Description

4-Channel SPO Digital Oscilloscopes 39

 "Single” button: Press the "Single" button to activate the SINGLE mode. In

this mode only one acquisition is allowed at a time.

 Pre-trig/Post-trig/Trig-Delay: Datas before and after the trigger event . If

the trigger symbol is at the center of the screen, the portion of the traces corresponding to the first 7 divisions represent the pre-trig and the 7 following divisions the post-trig. This function is very useful because you can observe the samples that occur before and after the trigger event. Everithing that is to the right of the trigger event corresponds to the post-trig.

Trigger SOURCE

In « Edge » mode : the trigger source may be the signal to the following inputs : CH1, CH2, CH3, CH4, EXT, EXT/5 or AC line.

For the other trigger modes (Slope, Pulse, Vidéo, Window, Interval, DropOut, Runt, Pattern and Serial 1 & 2) the 4 possible trigger sources are: CH1, CH2, CH3 and CH4.

Page 40

Functional Description

40 4-Channel SPO Digital Oscilloscopes

Functional Description

III - TRIGGER System (cont’d)

1. Edge

Trigger « Edge »

Option

Settings

Description

Type

Edge

The rising or falling edge of the signal source is used to trigger.

Source

CH1 CH2 CH3 CH4

Note : The trigger source is active even if the channel is off.

EXT

The EXT TRIG source signal is not displayed. The EXT source is the signal to the “EXT TRIG” input BNC in the back of the oscilloscope. The trigger level adjustement range is: 1,6V to +1,6V.

EXT/5

Same as EXT option, but the signal is attenuated by a factor of 5. The trigger level range is multiplied by 5 : -8V to +8V.

AC line

The trigger source signal is the AC line. The trigger coupling is set to « DC » and the trigger level to 0V.

Slope

Trigger on the rising edge of the source signal.

Trigger on the falling edge of the source signal. Trigger on the rising and falling edges of the source signal.

Holdoff

Adjustable Fixed

Use the « Universal » knob to adjust the « holdoff ». The « holdoff » is fixed to the latest set value

Coupling

All components of the signal source passes

Blocks the DC component and attenuates the AC signal below 5.8Hz.

Low Pass

Filter

HF reject

Attenuates « high frequency » components above

1.27MHz.

High Pass

Filter

LF reject

Blocks the DC component and attenuates the « low

frequency » components below 2.08MHz.

Noise Reject

On Off

Enable or Disable the Noise Reject

Operation Steps

1. Set the trigger type

1) Press the “Setup » button to open the TRIGGER menu.

2) Press the "Type" button and select "Edge".

2. Set the trigger Source

Press the "Source" button and select the trigger source: "CH1", "CH2", "CH3", "CH4", "EXT",

"EXT/5" or "AC Line".

3. Set the trigger slope

Press the « Slope » button and select the trigger slope “ ”, “ ” or “ ”.

4. Set the Holdoff

Press the « Holdoff close » button  « Holdoff time » and use the “Universal” knob to adjust

the « Holdoff » time.

5. Set the Trigger coupling

a. Press the “Set Up” button to open the trigger settings menu. b. Press the “Coupling” button and select the coupling type: “DC”, “AC”, “HF Reject” ou “LF

Reject”.

Page 41

Functional Description

4-Channel SPO Digital Oscilloscopes 41

Functional Description

III - TRIGGER System (cont’d)

2. «Pulse»

Pulse

Trigger page 1

Use the Pulse type to trigger on a particular “pulse width” with respect to the entire signal.

Option

Settings

Description

Type

Pulse

Select the trigger pulse type and width.

Source

CH1, CH2, CH3, CH4

Select the trigger source.

Polarity

Select the pulse polarity : Positive or Negative

Limite Range

< (Pulse width less than pulse width setting)

> (Pulse width larger than pulse width setting)

<> (Pulse width outside the range of set values)

>< (Pulse width in the range of set values)

Select the condition that the pulse width must meet to obtain a trigger event.

Set the width

2,0ns to 4,2s

Use the « Universal » knob to set the pulse width.

Next page 1/2

Press this button open page 2/2

Page 42

Functional Description

42 4-Channel SPO Digital Oscilloscopes

Functional Description

III - TRIGGER System (cont’d)

Pulse Trigger

page 2

Option

Settings

Description

Type

Pulse

Coupling

DC AC LF Reject HF Reject

Select the trigger coupling.

Noise Reject

Off

Noise Reject enable

Noise Reject disable

Next Page 2/2

Press this button to open the page 1/2

Operation Steps

1. Select the type

1) Press the « Setup » button to open the “TRIGGER” menu.

2) Press the "Type" button and select "Pulse"

2. Set the condition

Polarity : “ ”, “ ”,

Press the “Limit Range” to select the condition

“< ”, “ > ”, “< >” or “> <”

3. Set the pulse width

Use the "Universal" knob to set the pulse width limit.

Page 43

Functional Description

4-Channel SPO Digital Oscilloscopes 43

Functional Description

III - TRIGGER System (cont’d)

«VIDEO»Trigger

To trigger on « Lines » or « Frames » of standard video signals.

Video Trigger

Option

Settings

Description

Type

Video

To trig on video signals: NTSC, PAL/SECAM, HDTV and custom.

Source

CH1, CH2, CH3, CH4

Select the trigger source.

Standard

NTSC - PAL/SECAM 720p/50 - 720p/60 1080p/50 - 1080p/60 1080i/50 - 1080i/60 Custom

Select the video standard

Sync

Any line Line Number Field

Choose the appropriate video trigger:

Any line - Line Number - Field 1 - 2

Operation

Steps

1. Set the type

1) Press the “Setup” button to open the TRIGGER menu.

2) Press the "Type" button and select "Video"

2. Set the Sync

1) Press the “Sync” button to select “Any line” , or “Line Number” (select), Field 1 or 2.

2) If you choose « Select », use the “Universal” knob to set the line number.

3. Set the Standard

1) Press the “Standard” button and select “PAL/SECAM” or “NTSC” or ....

Page 44

Functional Description

44 4-Channel SPO Digital Oscilloscopes

Functional Description

III - TRIGGER System (cont’d)

« Slope »

Trigger on a positive or negative slope whose duration is specified.

« Slope » Trigger

page 1

Option

Settings

Description

Type

Slope

Trigger on a positive or negative slope of specific duration.

Source

CH1, CH2 CH3, CH4

Select the trigger source.

Slope

Positive slope

Negative slope

Limit Range

< , > < > > <

Select the trigger condition on slope duration.

< Less than > Greater than < > Outside the limited range

> < Inside the limited range

Duration

Use the "Universal" knob to adjust the slope duration in the range: 2 ns to

4.20s.

1/2

Page 45

Functional Description

4-Channel SPO Digital Oscilloscopes 45

Functional Description

III - TRIGGER System (cont’d)

Slope Trigger

page 2

Option

Settings

Description

Type

Slope

Level

Lower Upper

Select the level (L1 or L2) to adjust with the trigger "Level" knob. You can adjust the two levels 'L1' & "L 2" that define the slope.

Coupling

DC - AC LF Reject HF Reject

Select the trigger coupling

Noise Reject

On Off

Page 2/2

Press this button to open page 1/2

Operation Steps

1. Enter the signal on CH1 or CH2 or CH3 or CH4.

2. Press the “Auto” button.

3. Press the “Setup” button to open the “Trigger Menu”.

4. Press the “Type” button and select "Slope".

5. Press the “Source” button and select “CH1” or “CH2” or “CH3” or “CH4”.

6. Press the “Limit Range” button and select the condition: “<”, “>”, “<>”, “><”.

7. Press the “Time” button and use the “Universal” knob to adjust the slope duration.

8. Press the “Next Page” button to open page 2/2.

9. Press the “Lower Upper” button to select the level to adjust L1 or L2.

10. Use the “Level” knob to adjust L1 or L2.

Page 46

Functional Description

46 4-Channel SPO Digital Oscilloscopes

Functional Description

III - TRIGGER System (cont’d)

« Window » trigger

When the « window » trigger type is enabled, the oscilloscope triggers when the signal exits, the window defined by the two levels L1 and L2, from the top or bottom level.

Window Trigger

page 1

Option

Settings

Description

Type

Window

The window is defined by two voltage levels L1 and L2.

Source

CH1, CH2, CH3, CH4

Select the trigger source CH1 or CH2 or CH3 or CH4

Window type

Absolute Relative

Absolute: the two levels are set independently Relative: we adjust the delta on either side of a

central value.

Lower Upper Center Delta

The trigger window is define by the lower and upper value or by the delta relative to a central value.

Coupling

DC AC LF Reject HF Reject

Trigger source coupling

Noise Reject

ON Off

Enable (On) or Disable(Off) the noise reject

Page 47

Functional Description

4-Channel SPO Digital Oscilloscopes 47

Functional Description

III - TRIGGER System (cont’d)

Interval

Trigger

page 1

Option

Settings

Description

Type

Interval

In this mode the trigger event occur on the second edge, when the time interval between two consecutive edges is : < or > or <> or >< to the set value.

Source

CH1, CH2, CH3, CH4

Select the trigger source CH1 or CH2 or CH3 or CH4

Slope

Select the slope (Rising or Falling) that starts the interval

« Limit Range »

< , >

< > , > <

Trigger Condition:

< Less than > Greater than < > Outside the window > < Inside the window

Duration

Range : 2ns à 4.20s

1/2

To open page 2/2

« Interval »

Trigger page 2

Option

Settings

Description

Type

Interval

Coupling

DC - AC - LF Reject - HF Reject

Trigger source coupling.

Noise Reject

On Off

Enable or Disable noise reject

2/2

open page 1/2

Page 48

Functional Description

48 4-Channel SPO Digital Oscilloscopes

Functional Description

III - TRIGGER System (Cont’d)

« DropOut »

trigger page 1

Settings

Description

Type

DropOut

A trigger event occurs if the signal disappears for a time longer than the specified « DropOut » duration.

Source

CH1, CH2 CH3, CH4

Select the trigger source CH1 or CH2 or CH3 or CH4

Slope

Select the edge (state) that reset the dropout duration.

Over Time type

Edge State

Duration

« DropOut » duration range : 2ns to 4.20s

1/2

open page 2/2

« DropOut »

page 2

Option

Settings

Description

Type

DropOut

Coupling

DC AC LF Reject HF Reject

Trigger source coupling.

Noise reject

On Off

Enable or disable noise reject.

2/2

Open page 1/2

Page 49

Functional Description

4-Channel SPO Digital Oscilloscopes 49

Functional Description

III - TRIGGER System (cont’d)

« Runt »

Trigger

page 1

Option

Settings

Description

Type

Runt

A trigger event occurs if the pulse (negative or positive) crosses the first level (L1) but not the second level (L2) of the window, before recrossing the (L1) level in a given time.

Source

CH1, CH2, CH3, CH4

Select the trigger source CH1 or CH2 or CH3 or CH4

Polarity

Select the pulse polarity : Positive or Negative

Limit Range

< , >

< > , > <

Select the limits for « Runt »

< Less than > Greater than < > Outside the window > < Inside the window

Duration

« Runt » duration range : 2ns - 4.20s

1/2

Open page 2/2

« Runt »

Trigger

page 2

Option

Settings

Description

Type

Runt

Time

Use the "Universal" knob to adjust the Runt duration in the range : 2ns to 10s.

Lower - Upper

Use the Level knob to adjust the Lower and

Upper levels 'L1' and "L2".

Coupling

DC AC LF Rej HF Rej

Trigger source coupling.

Noise Reject

On Off

Enable or disable the « Noise Reject ».

2/2

Open page 1/2

Page 50

Functional Description

50 4-Channel SPO Digital Oscilloscopes

Functional Description

III - TRIGGER System (cont’d)

« Pattern »

Trigger

without the

« Digital » option

page 1

Option

Settings

Description

Type

Pattern

Triggers when the «pattern» condition goes from false to true.

We can also adjust the time duration of the pattern “true” condition.

Note : Input coupling must be : DC.

Inputs CHi

CH1 CH2 CH3 CH4

Select the Pattern inputs and the active level :

Low High Invalid

Page 1/2

Open page 2/2

Trigger type

« Pattern »

Without the

Digital option

page 2

Option

Settings

Description

Type

Pattern

Logic

AND, OR NAND, NOR

Fonction

Limit Range

< > < > > <

« True » pattern durantion condition limit

Duration

Use the "Universal" knob to adjust the duration of the pattern « true » condition in the range: 2 ns to 4.20s.

HoldOff Time

Setting range : 100ns to 1.50s.

« Next page »

2/2

open page 1/2

Page 51

Functional Description

4-Channel SPO Digital Oscilloscopes 51

« Pattern » with « Digital » option

page 1/4

Option

Settings

Description

Type

Pattern

Triggering when the «pattern» condition goes from false to true.

We can also adjust the time duration of the pattern “true” condition.

Note : Input coupling must be : DC.

Inputs CHi

CH1 CH2 CH3 CH4

Select the Pattern inputs and the active level :

Low High Invalid

Page 1/2

Open page 2/2

We inject on CH4 the « Cal 3V 1kHz » signal and on the 8bit digital bus square waves of frequency 68Hz.

Page 52

Functional Description

52 4-Channel SPO Digital Oscilloscopes

« Pattern » with « Digital » option

page 2/4

Option

Settings

Description

Type

Pattern

Digital inputs : select the logic type to set automatically the threshold :

TTL - CMOS - LVCMOS3.3 - LVCMOS2.5 or Custom

Di Inputs

D0 D1 D2 D3

Select the pattern inputs and the active level: Low High Invalid

Page 2/4

Open page 3/4

Pattern with the

Digital option

page 3/4

Option

Valeurs

Instruction

Type

Pattern

Digital inputs : select the logic type to set automatically the threshold :

TTL - CMOS - LVCMOS3.3 - LVCMOS2.5 or Custom

Di Inputs

D4 D5 D6 D7

Select the pattern inputs and the active level: Low High Invalid

Page 3/4

Open page 4/4

Pattern with the

Digital option

page 4/4

Option

Settings

Description

Type

Pattern

Logic

AND, OR NAND, NOR

Function

Limit Range

< , > < > , > <

True pattern duration limit

Durée

Use the "Universal" knob to adjust the « true » pattern duration within the range : 2 ns à 4.20s.

HoldOff

Setting range : 100ns to 1.50s.

4/4

Open page 1/4

More details  § XI - DIGITAL, option.

Page 53

Functional Description

4-Channel SPO Digital Oscilloscopes 53

Functional Description

III - TRIGGER System (cont’d) ()

« Serial1-2 »

Trigger

Option

Settings

Description

Serial1

I2C

I2C is the default setting on Serial 1.

Condition

Start - Stop - Restart No Ack

Condition

EEPROM

Limit Range

= , > , <

Data1

0xXX

Condition

7 Addr & Data

Addr, Data 1, Data 2

0xXX, 0xXX, 0xXX

R/W bit

Write - Read - Dont Care

Condition

10 Addr & Data

Addr, Data1, Data2

0xXX , 0xXX , 0xXX

R/W bit

Write - Read - Dont Care

Condition

Data Length

Address

7bit 10bit Byte Length

1 to 12 adjustable

Page 54

Functional Description

54 4-Channel SPO Digital Oscilloscopes

Functional Description

III - TRIGGER System (cont’d) ()

Trigger

« Serial 2 »

Option

Settings

Description

Serial 2

SPI

SPI is the default setting on Serial 2

Trigger Setting

SPI Trigger Setting

Trigger type

MOSI MISO

Data Length

4 to 96 ajustable

Bit Roll

0 to 95

Bit Value

0 1 X

All Same

0 1 X

Bit Order

MSB LSB

()

Further informations : § DECODE : Decode bus SPI/I2C/UART/LIN/CAN

Page 55

Functional Description

4-Channel SPO Digital Oscilloscopes 55

Functional Description

III - TRIGGER System (cont’d)

Trigger

« Serial1-2 »

Option

Settings

Description

Serial1

UART/RS232

Trigger on UART/RS232 serial bus.

Trigger Setting

Source Type

RX TX

Condition

Start - Stop - Data - Parity error

Bus Configure

Baud

600-1200-2400-4800-9600-19200-38400-57600115200-Custom

Data Length

5 - 6 - 7 - 8

Parity Check

None - Odd - Even

Stop Bit

1 - 1.5 - 2

Idle Level

Low - High

Page 56

Functional Description

56 4-Channel SPO Digital Oscilloscopes

Functional Description

III - TRIGGER System (cont’d)

Trigger

« Serial 1-2 »

Option

Settings

Description

Serial 1

CAN

Trigger on CAN serial Bus

Trigger Setting

CAN TRIG SET

Start - Remote - ID - ID+DATA - Error

Bus Configure

Baud

5kb/s-10kb/s-20kb/s-50kb/s-100kb/s-125kb/s-250kb/s500kb/s-800kb/s-1Mb/s-Custom

Page 57

Functional Description

4-Channel SPO Digital Oscilloscopes 57

Functional Description

III - TRIGGER System (cont’d)

Trigger

« Serial1-2 »

Option

Settings

Description

Serial1

LIN

Trigger on LIN serial Bus.

Trigger Setting

Condition

Break - ID - ID+DATA - Data Error

Bus Configure

Bit Rate

600-1200-2400-4800-9600-19200-Custom

Page 58

Functional Description

58 4-Channel SPO Digital Oscilloscopes

Functional Description

III - TRIGGER System (cont’d)

Trigger COUPLING

Use the appropriate coupling to the trigger source signal.

To select the trigger coupling, first press the "Setup" button to open the trigger menu and select the trigger type : "Edge", "Pulse", Video", "Slope", "Window", "Interval", "DropOut" or "Runt" then press the “Coupling” submenu and select the coupling of the trigger source: CH1 or CH2 or CH3 or CH4.

Four types of coupling are available : AC - DC - LF Reject - HF Reject

Horizontal POSITION

The horizontal « Position » knob allows to adjust the interval of time between the trigger event and the screen center. The horizontal "Position" knob allows to adjust the display portion of the waveform before or after the trigger event . The

horizontal position reference is the center of the screen, the ″Position″ (Delay :) is positive on the left side of the screen and negative on the right side.

Trigger Slope & Trigger Level

The "Slope" and "Level" control define the trigger point. The "slope" polarity (Edge trigger type only) determines which signal edge (Rising or

Falling or both) causes the trigger. The Level knob controls the vertical position (voltage) of trigger threshold.

Falling edge

Rising edge

g g

e r l

e v

e l c

a n

e a

d j

e d

a l

Note :

● Use the SINGLE shot mode to capture a single signal (not

repetitive).

● The trigger source coupling does not affect the bandwidth

of the displayed channel.

Page 59

Functional Description

4-Channel SPO Digital Oscilloscopes 59

Functional Description

III - TRIGGER System (cont’d)

HOLDOFF

Triggering Inhibition time

Use the « Holdoff » to obtain a stable display in the case of complex signals such as pulse bursts. The “HoldOff” represents the time interval between the detection of a valid trigger event and the moment when the oscilloscope is ready to detect a new trigger event. The oscilloscope will not trigger during the Holdoff time, because the trigger circuit is inhibited. With "pulse bursts", set the Holdoff equal to the burst length, so that the oscilloscope will trigger on the first pulse of the burst masking the other pulses.

Holdoff time

Trigger position

Trigger level

Operation

Steps

To set the Hold-Off :

1. Press the “Setup” button to open the TRIGGER Menu.

2. Press the “Type” button and select the trigger type.

3. Press the “Holdoff” button and use the ″Universal″ knob to adjust the Holdoff.

Set the HoldOff time to obtain a stable waveform.

Note : With periodic complex waveforms use the « Holdoff » to stabilize the

display.

Example : We display on CH3 with the option Color « On » a periodic signal (generated by the DOX3304 AWG) having two rising edges separated by 392µs (measured with the manual cursors ΔT= X2-X1= 390µs - (-2µs) = 392µs).

Color : is « On » (Color grading: Red corresponds to frequent points and Blue to

rare points) and the “Edge” trigger type.

If the holdoff is less than 392µs we observe double triggers instability : The

most frequent triggering is on the first rising edge (Red trace) and rarely on the second rising edge (Blue trace).

If the holdoff is greater than 392µs the trigger event is always on the same

edge the oscilloscope displays only a red trace.

Page 60

Functional Description

60 4-Channel SPO Digital Oscilloscopes

Holdoff =

355µs<392µs

the oscilloscope

displays two

waveforms

resulting from a

double triggering

(Blue and Red

waveforms)

Holdoff = 393µs

> 392µs the

oscilloscope

display only the

red waveform

This holdoff

value prevents

the double

triggering

Page 61

Functional Description

4-Channel SPO Digital Oscilloscopes 61

Functional Description

IV - ACQUISITION System

Acquisition menu

« ACQUIRE »

When acquiring an analog signal, the oscilloscope converts it into digital format and displays a waveform. The acquisition mode defines how the signal is digitized. The time base setting multiplied by the number of horizontal divisions of the screen determines the duration of the recording in seconds (“S/div” x 14div), and the elementary step of acquisition is given by the sampling period. The Memory Depth, the Sample Rate and the Waveform Recorded Length are related by the following formula:

Memory Depth (Nb Recorded Samples) = Sampling rate ( Samples/sec) x Waveform Recorded Length (in sec)

The oscilloscope adjusts the current memory depth according to the the selected time base coefficient : For example we set the maximum memory depth to “14Mpts” (Menu «Acquire»  Sub-menu « Memory Depth ») and the channel CH1 “On” (all other channels are Off), the oscilloscope will adjust the “Current” memory depth according to the selected Time Base coefficient:

S/div

Sample Rate

Memory depth (Samples)

1ns

2GSPS

28 Samples

2ns

2GSPS

56 Sa

5ns

2GSPS

140 Sa

10ns

2GSPS

280 Sa

20ns

2GSPS

560 Sa

50ns

2GSPS

1.4k Sa

100ns

2GSPS

2.8k Sa

200ns

2GSPS

5.6k Sa

500ns

2GSPS

14k Sa

1µs

2GSPS

28k Sa

2µs

2GSPS

56k Sa

5µs

2GSPS

140k Sa

10µs

2GSPS

280k Sa

20µs

2GSPS

560k Sa

50µs

2GSPS

1.40M Sa

100µs

2GSPS

2.80M Sa

200µs

2GSPS

5.60M Sa

500µs

2GSPS

14.0M Sa

1ms

2GSPS

28.0M Sa

2ms

1GSPS

28.0M Sa

5ms

0.4GSPS

28.0M Sa

10ms

200MSPS

28.0M Sa

20ms

100MSPS

28.0M Sa

50ms

40MSPS

28.0M Sa

100ms

20MSPS

28.0M Sa

200ms

10MSPS

28.0M Sa

500ms

4MSPS

28.0M Sa

2MSPS

28.0M Sa

1MSPS

28.0M Sa

400KSPS

28.0M Sa

10s

200KSPS

28.0M Sa

20s

100KSPS

28.0M Sa

50s

40KSPS

28.0M Sa

Page 62

Functional Description

62 4-Channel SPO Digital Oscilloscopes

Functional Description

IV - ACQUISITION System (cont‟d)

« Acquire »

Press the "Acquire" button to open the acquisition menu.

Acquisition

Settings

Option

Settings

Description

Acquisition

Normal

This mode is used for an accurate sampling and display of most signals.

Peak Detect

This mode is used to display noise and to reduce aliasing.

High Res

To increase the vertical resolution and to reduce random noise.

Average

To reduce the random noise on displayed waveforms. Average: 4, 16, 32, 64,128, 256, 512, 1024

Sinx/x

Sinx

Sinusoidal Interpolation "Sinx" Linear Interpolation "x"

Sequence

Acq Mode

Off Normal Single

Display

Mode

Overlay Waterfall

Frame Set

Setting range : 1 to 80000 (The max value depends on the time base coefficient “S/div” and the number of active channels)

Mem Depth

7k - 14k 70k - 140k 700k - 1.4M

- 7M - 14M

Select the maximum Memory Depth value

Page 63

Functional Description

4-Channel SPO Digital Oscilloscopes 63

Functional Description

IV - ACQUISITION System (cont‟d)

Sampling Modes

The oscilloscope has the following sampling modes: Normal - Peak Detect - Average - High Resolution

Normal

The oscilloscope samples the signal at regular intervals to build the digital waveform. In general this mode is a true representation of the signal.

Advantage

It is the most common sampling mode. This mode reduces the random noise.

Disadvantage

The "Normal" mode does not capture fast signal changes that may occur between to successive samples. An aliasing phenomenon can result and the short pulses may not be detected. In the presence of short pulses (glitch) you must use the Peak Detect mode.

« Peak Detect »

The « Peak Detect » mode capture the minimum and maximum values of the signal (Oversampled waveform) between two successive samples and displays two Waveforms, one with the Low values and the other with the High values.

Advantage

In this mode, the oscilloscope can capture fine pulses (glitch) which have not been detected by the "Normal" mode.

Disadvantage

The trace thickness (noise) will be higher in this mode.

Page 64

Functional Description

64 4-Channel SPO Digital Oscilloscopes

Functional Description

IV - ACQUISITION System (cont‟d)

Average Mode

In this mode, the oscilloscope performs “Multiple Waveforms” acquisitions, average them and displays the resulting “1 Waveform”.

Advantage

Use this mode to reduce the random noise.

A noisy sine wave acquire in « Normal » and « Average » (128) modes

High Res mode

High Res

The High Res mode uses « on the fly » over-sampling and averaging. Each displayed sample point represents the average value of the samples acquired in the elementary time interval. The «High Res» mode increases the effective vertical resolution of the oscilloscope. The High Res mode reduces the signal random noise.

The High Resolution mode can be used even with SINGLE mode because the averaging takes place at each point displayed and not on successive waveforms acquisitions as in the « Average » mode.

Page 65

Functional Description

4-Channel SPO Digital Oscilloscopes 65

Functional Description

IV - ACQUISITION System (cont‟d)

Sequence Mode

In the Sequence mode, the recording memory is segmented. The oscilloscope captures and records a waveform (Frame) at each trigger event. When the acquisition sequence is completed, the oscilloscope displays the first 20 acquired waveform segments. In this mode, the “waveform capture speed” can reach up to 300000 waveforms/sec. When a trigger event occurs, the oscilloscope acquires and records a waveform (segment) and then waits for a new trigger event. The oscilloscope “blind time” is minimized allowing the capture of certain signal details, that were not visible with other acquisition modes.

For a 14Mpts maximum memory depth and with all four channels activated, the table below shows the maximum number of Frames according to the « Time Base » coefficient :

Time Base Coefficient

Sampling

Frequency

Current memory

Maximum

Frame Set

1ns/div

1.00GSPS

14pts

80 000

2ns/div

1.00GSPS

28pts

80 000

5ns/div

1.00GSPS

70pts

80 000

10ns/div

1.00GSPS

140pts

80 000

20ns/div

1.00GSPS

280pts

80 000

50ns/div

1.00GSPS

700pts

80 000

100ns/div

1.00GSPS

1.4kpts

63 157

200ns/div

1.00GSPS

2.8kpts

33 519

500ns/div

1.00GSPS

7kpts

16 042

1µs/div

1.00GSPS

14kpts

8 108

2µs/div

1.00GSPS

28kpts

4 067

5µs/div

1.00GSPS

70kpts

1 630

10µs/div

1.00GSPS

140kpts

815

20µs/div

1.00GSPS

280kpts

408

50µs/div

1.00GSPS

700kpts

163

100µs/div

1.00GSPS

1.4Mpts

200µs/div

500MSPS

1.4Mpts

500µs/div

200MSPS

1.4Mpts

1ms/div

100MSPS

1.4Mpts

2ms/div

50MSPS

1.4Mpts

5ms/div

20MSPS

1.4Mpts

10ms/div

10MSPS

1.4Mpts

20ms/div

5MSPS

1.4Mpts

50ms/div

2MSPS

1.4Mpts

100ms/div

1MSPS

1.4Mpts

200ms/div

500kSPS

1.4Mpts

500ms/div

200kSPS

1.4Mpts

1s/div

100kSPS

1.4Mpts

2s/div

50kSPS

1.4Mpts

5s/div

20kSPS

1.4Mpts

10s/div

10kSPS

1.4Mpts

20s/div

5kSPS

1.4Mpts

50s/div

2kSPS

1.4Mpts

Due to display limitations, the oscilloscope can not display more than 20 waveforms at a time (Overlay» or « Waterfall » display modes) .

Page 66

Functional Description

66 4-Channel SPO Digital Oscilloscopes

Functional Description

IV - ACQUISITION System (cont‟d)

Advantage

This mode allows you to increase the maximum waveforms recording (in a segmented memory) frequency to 300000 Waveforms/s. It allows us to observe details that rarely occur, because the « blind time » (time without signal acquisitions) is minimized.

Disadvantage

The oscilloscope displays the acquired waveforms once the acquisition sequence is completed.

The oscilloscope can not display more than 20 segments (Frames) at a time.

Waterfall ( 3 segments at a time)

Overlay (3 segments at a time)

Using the « Sequence » mode we were allowed to capture a waveform that occurs

rarely. We used the two viewing modes « Waterfall » and « Overlay »

Page 67

Functional Description

4-Channel SPO Digital Oscilloscopes 67

Functional Description

IV - ACQUISITION System (cont‟d)

Memory Depth

Advantage

A deep memory allows to record the signal evolution over a long period of time, and then analyze it in detail with a very fine elementary pitch. For example with a 28Mpoints memory depth we can record the evolution of a signal for 14ms with an elementary pitch of 0.5ns.

Disadvantage

We have to search in the long recording memory, the waveform portion to observe in details.

Using the x50000 Zoom mode to display simultaneously the overall waveform and a detail

Using x1000000 Zoom coefficient to analyze in detail the detail

Using a “28Mpoints” memory depth, we were able to record “14ms” of signal evolution at a sampling rate of 2GSPS (=0.5ns elementary pitch). We then used two Zoom factors : x50000 (to display a 280ns portion of 14ms) and x1000000 (to display a 14ns portion of 14ms) to observe an elementary portion of the recorded waveform in “RUN” or “STOP”. We can move the Zoom window in the entire memory depth by using the horizontal « Position » knob.

Page 68

Functional Description

68 4-Channel SPO Digital Oscilloscopes

Functional Description

IV - ACQUISITION System (cont‟d)

Time Base

The oscilloscope digitizes the waveform by sampling the input signal at a regular time interval. The Time Base coefficient and the Memory Depth set the sampling frequency.

Use the "S/div" knob to set the “Time Base” coefficient. Open the « Acquire » menu to set the suitable memory depth.

Under-Sampling Aliasing

Example of

«aliasing»

observed with a

160MHz sinusoïdal

signal sampled at

100MSa/s : the

hardware counter

frequency is :

« f=160.66MHz »

the automatic

frequency

measurement is

« Freq=667.8kHz »

Comparing the two

different frequency

values we can

highligth the

presence of

«aliasing»

The aliasing occurs when the oscilloscope sampling rate is not fast enough to precisely reconstruct the digital waveform. The oscilloscope displays a lower frequency waveform, or an unstable waveform.

The real high frequency signal

The displayed low-frequency signal resulting from aliasing

Sample points

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Functional Description

4-Channel SPO Digital Oscilloscopes 69

Functional Description

IV - ACQUISITION System (cont‟d)

Operation Steps

Example:

a 250MHz sine

wave displayed

using the “Sinx”

sinusoidal

interpolation

To set sampling

Press the “Acquire” button to open the ACQUIRE menu. Press the « Acquisition » button and use the “Universal” knob to select the

acquisition mode : “Normal”, “Peak detect”, “High Res” or “Average”.

To set the « Average »

Press the « Averages » button to select the number of averages: “4”, “16”, “32”, “64”, “128”, “256”, “512” or “1024”.

To set the interpolation Press the “Sinx/x” button to select the interpolation: « Sinx » or « x ». "Sinx" : Sinusoidal interpolation:

Example :

a 250MHz sine wave displayed using the linear

interpolation « X »

"X" Linear interpolation:

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Functional Description

70 4-Channel SPO Digital Oscilloscopes

Functional Description

IV - ACQUISITION System (cont‟d)

SEQUENCE Mode

In the « Sequence » mode, the oscilloscope is ready to display waveforms, once the acquisitions are completed. In this mode, the maximum number of acquisitions per second can reach 300000. For each trigger event, the oscilloscope fills a segment of the recording memory and continues until the memory is completely filled. Once completed, the oscilloscope displays the acquired segments up to 20 segments at a time.

To use the « Sequence » the Horizontal format must be: “YT”. To set the Sequence mode : 1° Press the « Acquire » button to open the ACQUIRE menu 2° Press the "Sequence" button to open the SEQUENCE menu 3° Press the « Acq. Mode » button to disable or enable the Acquisition

« Off - On » (Off is the default value). 4° Press the « Display Mode » button to select the display mode : Overlay - Waterfall 5° Press the « Frame set » button and use the « Universal” knob to set the

displayed « Frame set » 6° Press the «Run/Stop» button to start recording the sequence 7° When the acquisition sequence is completed and the oscilloscope

displays the first 20 segments, press the « Run/Stop » button 8° Manually scroll the acquired segments using the « Start », « End »

buttons and the « Universal » knob 9° or Press the « Operation » button to automatically scroll the acquired

segments.

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Functional Description

4-Channel SPO Digital Oscilloscopes 71

Functional Description

IV - ACQUISITION System (cont‟d)

RUN/STOP SINGLE AUTO NORMAL

Run/Stop

Press the "Run/Stop" button to start (Run/Stop button is lit in yellow) the signal acquisition, press this button again to Stop (Run/Stop button is lit in red).

Single

Press the ″Single″ button to Arm the trigger (the oscilloscope is Ready, and the “Run/Stop” button is lit in yellow), then when a trigger event is detected a unique acquisition starts, when the acquisition is completed the oscilloscope Stops (Run/Stop button is lit in red).

In SINGLE mode when you press the "Single" button to start a unique acquisition, the oscilloscope performs the following steps:

1. Acquisition of “Pre-Trigger” samples, which are represented on the screen by the portion of the waveform to the left of the Trigger point.

2. The oscilloscope acquires the « Pre-Trigger » samples continously and

waits for the trigger event.

3. Detection of the trigger event.

4. After the trigger event, the acquistion continues until the recording memory is filled with the « Post-Trig » samples, which are represented on the screen by the portion of the waveform to the right of the trigger point.

5. The oscilloscope displays the waveform and Stops (Run/Stop button is lit in

red). Press again the « Single » button to start a new single acquisition .

Auto

Press the « Auto » button to enable the Auto mode. In this mode, acquisitions occur in the presence or absence of a trigger event.

Normal

Press the « Normal » button to enable the « Normal » mode. In this mode, acquisitions occur only when a trigger event is detected.

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Functional Description

72 4-Channel SPO Digital Oscilloscopes

Functional Description

V - DISPLAY System

Display Menu

Press the "Display" button to open the DISPLAY menu.

MENU pad

Display

page 1

Option

Settings

Description

Type

Vectors

Points

Two adjacent points (samples) are connected by a straight segment.

Points (samples) are not connected together .

Color

ON OFF

Allows to switch the SPO display from the “color palette” type to the “intensity grading” type.

If « Color : On » the SPO «color palette» is active. If « Color : Off » the SPO « intensity grading » is active.

Persistence

Off 1 sec 5 sec 10 sec 30 sec Infinite

To set the persistence duration.

Clear Pers

Dump the Persistence

Clear Display

Dump the Display

Page1/2

Open page 2/2

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Functional Description

4-Channel SPO Digital Oscilloscopes 73

Functional Description

V - DISPLAY (cont‟d)

«Display» Menu

page 2

Option

Settings

Description

Grid

Display the grid and the axes. Display the axis. Grid and axis are not displayed.

Intensity

Sets the trace intensity.

Brightness

Sets the Grid intensity.

Transparence

Set the transparence.

Page 2/2

Press this button to open page 1/2.

SPO

Two SPO display modes:

Color On : Display with a « Color palette »

Color Off : Display with an « intensity grading »

Color “On”

The SPO « Color

palette » is « On ».

The point (sample)

color depends on

the occurrence : the

Red color corresponding to the most frequent points

(samples) and the

purple color to rare

points. All channel

waveforms use the

same “palette”.

Color “Off”

The SPO display

uses an « intensity

grading » (256

levels). Each

channel has its own

color but the

intensity of the

points change

according to their

occurrence.

Rare very frequent

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Functional Description

74 4-Channel SPO Digital Oscilloscopes

Functional Description

V - DYSPLAY System (cont‟d)

Operation Steps

1. To set the display type

1) Press the "Display" button to open the DISPLAY menu.

2) Press the "Type" button and select "Vectors" or "Points".

2. To set the Color Press the "Color″ button and set "ON" or "Off" : Off : Each Channel is displayed with its own color and an intensity grading : CH1 yellow, CH2 red, CH3 blue and CH4 green ON : All channels are displayed using the same « color palette » (Red Yellow Green Blue Purple)

3. To set the Persistance Press the "Persistance" button and select "Off", "1 Sec", "5 Sec", "10 Sec", "30 Sec", or "Infinite". This option is used to view, for example, the drift of a signal over time.

4. «Clear» Persistence

Press this button to dump the persistence

5. «Clear» Display

Press this button to dump the Display

6. Next page button

Press this button to open page 2/2

7. To set the Grid Press the “Grid” button and select the grid type “ ”, “ ” or “

”

8. To set the Intensity Press the “Intensity” button and use the “Universal” knob to set the trace Intensity.

9. To set the « Brightness » Press the “Brightness” button and use the “Universal” knob to set the grid Brightness.

10. To set the transparence

Press the “Transparence” button and use the « Universal » knob to set the transparence.

11. Next Page

Press this button to open page 1/2.

Caution in XY mode,

the «Persistence» and the «Color» are «Off» and the “Dots”

display type is

imposed

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Functional Description

4-Channel SPO Digital Oscilloscopes 75

Functional Description

V - DISPLAY System (cont‟d)

X-Y Format

The XY format is used to analyze the phase difference between signals using the Lissajous figures. In « XY » mode, channel CH1 (CH3) is the X axis and channel CH2 (CH4) the Y axis. The oscilloscope uses an acquisition mode without trigger and displays XY datas in the form of points, each XY point corresponds to a simultaneous acquisition on CH1(X) and CH2(Y) : X= CH1 sample (or CH3), Y= CH2 sample (or CH4).

The "XY" mode accepts sampling frequencies from 20Sa/s to 1GSa/s (1-2-5 sequence).

If we visualize, in XY mode, two sinusoidal signals with the same frequency but phase shifted by an angle θ :

We will have : Sin(θ)=A/B or C/D  θ=± arcsin(A/B) or ± arcsin(C/D)

Two sine waves with same frequency but phase shifted by 40° :

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Functional Description

76 4-Channel SPO Digital Oscilloscopes

Operation Steps

● Channel CH1 (or CH3) X axis, the corresponding “V/div” and vertical “Position” knobs allows to adjust the horizontal scale and position.

● Channel CH2 (or CH4) Y axis, The corresponding “V/div” and vertical “Position” knobs allows to adjust the vertical scale and position.

● Turn the “S/div” knob to set the sampling rate

● The following functions are not available in “XY” mode:

- XY between a Real waveform and a Math waveform

- Cursor

- Trigger Control

- Horizontal position knob

- Vector display type

Note : The « Auto setup » function resets automatically to YT format.

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Functional Description

4-Channel SPO Digital Oscilloscopes 77

Functional Description

VI - MEASURE System

MEASUREMENTS

The oscilloscope displays the waveform, that is to say the variation of the signal amplitude (voltage or current) as a function of time. The oscilloscope displays : the vertical and horizontal scales and the automatic and cursors measurements values.

The oscilloscope has a « hardware » frequency counter on the signal of the active trigger source channel.

Scale measurements

This method allows a quick visual estimate of the amplitude or the period of the signal. For example, you can observe the signal amplitude and roughly determine it is slightly higher than 100 mV. You can estimate the amplitude by simple measurements by counting the number of major and minor divisions and multiplying by the vertical sensitivity. For example, if you count five major divisions between the minimum and maximum values of a signal, and if the vertical sensitivity is 100mV/div, then it is easy to calculate the peak-to-peak amplitude: 5 div x 100 mV/div = 500 mV.

Cursors measurements

Three modes : Manual, Track (cursors attached to the trace) and Off Press the "Cursors" button to open the cursors menu.

1. Manual Cursors

Option

Settings

Description

Mode

Manual

For measurements using manual cursors.

Type

Voltage Time

Use the cursors to measure the signal amplitude : voltage ∆V. Use the cursors to measure the period (or the frequency) of the signal : ∆T et 1/∆T.

Source

CH1 - CH2 CH3 - CH4 MATH REFA - REFB REFC - REFD

Select the reference source for measurements.

Cur X1

Select X1 cursor and use the "Universal" knob to adjust.

Cur X2

Select X2 cursor and use the "Universal" knob to adjust.

Cur X1-X2

Select X1-X2 cursors pair and use the "Universal" knob to adjust.

Cur Y1

Select Y1 cursor and use the "Universal" knob to adjust.

Cur Y2

Select Y2 cursor and use the "Universal" knob to adjust.

Cur Y1-Y2

Select Y1-Y2 cursors pair and use the "Universal" knob to adjust.

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Functional Description

78 4-Channel SPO Digital Oscilloscopes

Functional Description

VI - MEASURE Sytem (cont‟d)

Examples :

Use of X and Y

cursors to measure

the period (or frequency) and the amplitude of a sine

wave

When the « Manual Cursors » are active, the display shows two horizontal or vertical parallel cursors to measure voltage (Y cursors) or time (X cursors). Use the "Universal" knob to move the cursors. Select the appropriated reference source for cursors measurements.

● Voltage cursor (Y cursors) : The voltage cursors materialized on the screen in the form of horizontal lines. The cursor position is in Volt.

● Time Cursor (X cursors) : The time cursors materialized on the screen in the form of vertical lines. The cursor position is in second.

● Moving the cursors : Select the cursor (X or Y) and use the "Universal" knob to move it. When you move the cursor the value corresponding to the vertical and(or) horizontal position of the cursor is displayed in the top left of the screen.

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Functional Description

4-Channel SPO Digital Oscilloscopes 79

Functional Description

VI - MEASURE Sytem (cont‟d)

Operation

Steps

1. Press the "Cursors" button to open the CURSORS menu.

2. Press the “Mode” button and select “Manual”.

3. Press the "Type" button and select : "X1" or "X2" or "X1-X2" or "Y1" or "Y2" or "Y1Y2".

4. Press the "Source" button and selectet : "CH1", "CH2", "CH3", "CH4", "MATH", " REFA", "REFB", " REFC", " REFD", as the source reference for measurements.

5. Select "X1" and use the "Universal" knob to set X1.

6. Select "X2" and use the "Universal" knob to set X2.

7. Select "Y1" and use the "Universal" knob to set Y1.

8. Select "Y2" and use the "Universal" knob to set Y2.

9. The measurements values are displayed on the top left of the screen:

- The voltage difference (in Volts) between Cursor Y1 and Cursor Y2: ∆V

- The time difference (in Seconds) between Cursor X1 and Cursor X2: ∆T

- The inverse of ∆T : 1/∆T is in Hz

Track Mode

Option

Settings

Description

Cursor Mode

Track

″Track″ mode allows to measure with cursors

attached to the waveform.

Cursor X1

CH1 - CH2 CH3 - CH4

Select the channel attached to cursor X1.

Cursor X2

CH1 - CH2 CH3 - CH4

Select the channel attached to cursor X2.

Cur X1

Select the cursor X1 and use the "Universal" knob to adjust.

Cur X2

Select the cursor X2 and use the "Universal" knob to adjust.

X1-X2

Select the X1-X2 cursors pair and use the "Universal" knob to adjust.

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Functional Description

80 4-Channel SPO Digital Oscilloscopes

The « Track » mode displays two cross cursors attached to the trace. With the “Universal” knob, you can only adjust the horizontal position of the selected cross cursor. The oscilloscope displays the ∆V and ∆T values.

Operation

Steps

1. Press the "Cursors" button to open the CURSORS menu.

2. Press the “Mode” button and select "Track".

3. Press the "X1 source” button and select the attached channel.

4. Press the "X2 source” button and select the attached channel.

5. Select “X1” and use the “Universal” knob to move horizontally the X1 cross cursor.

6. Select “X2” and use the “Universal” knob to move horizontally the X2 cross cursor.

7. The measured values are displayed on the top left of the screen:

X1→T: The horizontal position of X1 Cursor (Time Cursor). Y1→V: The vertical position of Y1 Cursor (Voltage Cursor). X2→T: The horizontal position of X2 Cursor (Time Cursor). Y2→V: The vertical position of Y2 Cursor (Voltage Cursor). ∆T : The time interval between X1 and X2 cursors. 1/∆T : The inverse of the time interval between X1 and X2 cursors in Hz. ∆V : The voltage difference between Y1 and Y2 cursors.

Example :

Measuring the

amplitude and

the frequency

of a 1MHz

square wave

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Functional Description

4-Channel SPO Digital Oscilloscopes 81

Functional Description

VI - MEASURE Sytem (cont‟d)

Automatic Measurements Menu

Press the "Measure" button to open the MEASURE menu :

Menu Pad

Three types of automatic measurements :

 Voltage measurements  Time measurements  Delay measurements

Of the 32 automatic measurements available, 23 of them (14 voltage and 9 time) can be displayed individually with or without their statistics.

In the example below we have choosen to display the frequency :

Measure menu

Press the « Measure » button to open the MEASURE menu :

We can select : * The channel reference for measurements : CH1 or CH2 or CH3 or CH4 * The type of measurement of the 23 available : Vpp - Vmax - Vmin - Vamp Vtop - Vbase - Vmean - Mean - Vrms - Crms - FOV - FPRE - ROV - RPRE -

Period - Freq - +Wid - -Wid - Rise Time - Fall Time - Bwid - +Dut - -Dut * Press the « Add » button to display the selected measurement

* Press the « Clear » button to clear the displayed measurements * Press the « Statistics» button to display the statistics on the measurements

displayed. * Press the « All Measure » button to display a table with all the voltage (or

time, or delay) measurements.

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Functional Description

82 4-Channel SPO Digital Oscilloscopes

Functional Description

VI - MEASURE Sytem (cont‟d)

Statistics

Press the «Statistics» button to open the «Statistics» sub-menu:

We can then view statistics of the displayed measurements, the oscilloscope displays the following values:

Average, Min, Max, Standard Deviation and the Number of measurements.

All Measures

Option

Description

1. SOURCE

The reference channel for measurements : CH1 CH2 CH3 CH4

VOLTAGE

Press this button to display the 14 voltage measurements.

3. TIME

Press this button to display the 9 time measurements.

4. DELAY

SOURCE

Press this button to select the channel pair for the delay measurement :

CH1-CH2, CH1-CH3, CH1-CH4, CH2-CH3, CH2-CH4, CH3CH4

5. DELAY

Press this button to display the 9 delay measurements.

Example : displaying the 32 automatic measurements available: Voltage, Time, Delay

CH1 is the reference channel for the voltage and time measurements

For the delay measurements the reference is the channel pair : CH1-CH2

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Functional Description

4-Channel SPO Digital Oscilloscopes 83

Functional Description

VI - MEASURE System (cont‟d)

1. Automatic Voltage

Measurements

Option

Settings

Description

Source

CH1 CH2 CH3 CH4

Select the reference channel for voltage measurements.

Type

Vmax, Vmin, Vpp, Vamp, Vtop, Vbase, Cycle Mean, Mean, Cycle Vrms, Vrms, ROVShoot, FOVShoot, RPREShoot, FPREShoot

Press the "Type" button and use the "Universal" knob to select the voltage measurement type.

ROVShoot = Rise Overshoot FOVShoot = Fall Overshoot RPREShoot= Rise Preshoot FPREShoot= Fall Preshoot

2. Automatic Time Measurements

Option

Settings

Description

Source

CH1 CH2 CH3 CH4 Select the reference channel for

time measurements

Type

Rise Time, Fall Time, Freq, Period, Bwidth, +Width,

-Width, +Duty, -Duty

Press the "Type" button and use the "Universal" knob to select the time measurement type.

3.Automatic Delay

Measurements

Option

Settings

Description

Source

CH1-CH2 CH1-CH3 CH1-CH4 CH2-CH3 CH2-CH4 CH3-CH4

Reference channel pair for Delay measurements.

Type

Phase, FRR, FRF, FFR, FFF, LRR, LRF, LFR, LFF

Press the "Delay" button « On » or « Off » to display or not the delay measurements.

4. All measures

Option

Settings

Description

Source

CH1, CH2 CH3, CH4

Select the reference channel for measurements.

Voltage

On Off

Enable « All Voltage measurements ». Disable « All Voltage measurements ».

Time

On Off

Enable « All Time measurements ». Disable « All Time measurements ».

Delay

On Off

Enable « All Delay measurements ». Disable « All Delay measurements ».

Return

Press the « Up » button to return to the MEASURE menu.

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Functional Description

84 4-Channel SPO Digital Oscilloscopes

Functional Description

VI - MEASURE System (cont‟d)

Description

of the type of

measure

Type of measure

Description

Vmax

Waveform maximum peak voltage.

Vmin

Waveform minimum peak voltage.

Vpp

Absolute difference value between maximum and minimum peak voltage of the entire waveform

Vtop

Upper level most common voltage value of the waveform.

Vbase

Lower level most common voltage value of the waveform

Vamp

Voltage difference between Vtop and Vbase.

Vavg

Arithmetic mean over the first cycle of the waveform.

Mean

Arithmetic mean over the entire waveform.

Crms

The true RMS voltage value over the first cycle of the signal.

Vrms

The true RMS voltage value over the entire waveform.

ROVShoot

« Rise OVer Shoot » : Defined as (Vmax-Vtop)/Vamp after a positive edge.

FOVShoot

« Fall OVer Shoot » : Defined as (Vmin-Vbase)/Vamp after a negative edge.

RPREshoot

« Rise PRE shoot »: Defined as (Vmin-Vbase)/Vamp

before a rising edge.

FPREshoot

« Fall PRE shoot »: Defined as (Vmax-Vtop)/Vamp before a

falling edge.

Rise Time

« Rise Time »: the interval of time between 10% and 90%

of the first rising edge.

Fall Time

« Fall Time »: the interval of time between 90% and 10%

of the first falling edge.

BWid

« Burst Width »: The duration of a pulse burst over the

entire waveform.

+ Wid

+ Width: interval of time between the first rising edge and the next falling edge at 50% of Vamp.

- Wid

-Width: interval of time between the first falling edge and the next rising edge at 50% of Vamp.

+ Duty

+ Duty is the ratio between the positive pulse width and period.

- Duty

- Duty is the ratio between the negative pulse width and period.

Phase

The amount one waveform leads or lags another in time. Expressed in degrees, where 360 degrees comprise one waveform cycle.

FRR

The interval of time between the first rising edge of CHi source and the first rising edge of CHj source

FRF

The interval of time between the first rising edge of CHi source and the first falling edge of CHj source

FFR

The interval of time between the first falling edge of CHi source and the first rising edge of CHj source

FFF

The interval of time between the first falling edge of CHi source and the first falling edge of CHj source

LRR

The interval of time between the first rising edge of CHi source and the last rising edge of CHj source

LRF

The interval of time between the first rising edge of CHi source and the last falling edge of CHj source

LFR

The interval of time between the first falling edge of CHi source and the last rising edge of CHj source

LFF

The interval of time between the first falling edge of CHi source and the last falling edge of CHj source

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Functional Description

4-Channel SPO Digital Oscilloscopes 85

Functional Description

VI - MEASURE System (cont‟d)

Operation Steps

Voltage measurements

To display a particular voltage measurement :

1. Press the "Measure" button to open the "MEASURE" menu.

2. Press the "Source″ button to select the channel source for

measurements: "CH1", "CH2", "CH3", "CH4".

3. Press the “Type” button to select the measurement type to display.

4. Press the « Add » button to display the selected measurement

5. Press the « Clear » button to clear the displayed measurements

6. Press the « Statistics » button to display the measurement statistics

To display all voltage measurements

7. Press the « All measure » button to open the ALL MEASURE menu.

8. Press the "Voltage" button (On, Off) to display all voltage measurements.

9. Press the "Up" button to return to the « MEASURE » menu.

Note: You can display up to five automatic measurements at a time. Note : To display all the available measurements (Voltage, Time, Delay)

you have to activate them from the « All Measure » submenu.

Example : Displaying 5 automatic measurements, their statistics and the 32 available measurements

Page 86

Functional Description

86 4-Channel SPO Digital Oscilloscopes

Functional Description

VI - MEASURE System (cont‟d)

Operation Steps

Time measurements

To display a particular time measurement :

1. Press the "Measure" button to open the "MEASURE" menu

2. Press the "Source″ button to select the channel source for

measurements: "CH1", "CH2", "CH3", "CH4".

3. Press the “Type” button to select the measurement type to display.

4. Press the « Add » button to display the selected measurement

5. Press the « Clear » button to clear the displayed measurements

6. Press the « Statistics » button to display the measurement statistics

To display all time measurements

7. Press the « All measure » button to open the ALL MEASURE menu.

8. Press the "Time" button (On, Off) to display all time measurements.

9. Press the "Up" button to return to the « MEASURE » menu.

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Functional Description

4-Channel SPO Digital Oscilloscopes 87

Functional Description

VII - SAVE/RECALL System

Save/Recall

Press the “Save/Recall” button to open the SAVE/RECALL menu. This menu allows to Save/Recall : Setups, Waveforms, Picture, .CSV files.

4 data types can be saved :

- Setups - Waveforms - Pictures - .CSV files

The «Setups» files can be saved in internal (the oscilloscope) or external (USB memory device plugged in the “USB host” front panel connector) memories. You can save up to 20 Setups in the internal memory.

The Waveforms, the Pictures, and the .CSV files must be saved in external memories.

The setups and the waveforms can be recalled and displayed on the oscilloscope.

The pictures and the .CSV files can not be recalled or displayed on the oscilloscope, this files can be open on a PC.

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Functional Description

88 4-Channel SPO Digital Oscilloscopes

Functional Description

VII - SAVE/RECALL System

1. SAVE/RECALL

Pres the « Save/Recall » button to open the ”SAVE/RECALL” menu :

You can save

« Setups » in

internal or external

memory

You can save

Waveforms,

Pictures and .CSV

files only in

external memory

Page 89

Functional Description

4-Channel SPO Digital Oscilloscopes 89

Functional Description

VII - SAVE/RECALL System (cont‟d)

Saving « Setups »

in Internal or

External memory

To save a «Setup» file in the oscilloscope internal memory : 1° Press the « Save/Recall » button to open the SAVE/RECALL menu. 2° Press the « Type » button and select « Setups » 3° Select Save to « Internal » 4° Select a Setup N° location among the 20 available

5° Press the «Save» button to save the current Setup To save a setup file in an external memory (USB memory device

plugged in the « USB host » front panel connector) : 1° Press the « Save/Recall » button to open the SAVE/RECALL menu

2° Press the « Type » button and select « Setups » 3° Select Save to « External » 4° Plug the USB device in the « USB host » front panel connector and wait

for the USB icon appears and the following “Popup” message : « USB Flash Drive Plugged in ! » is displayed.

5° Press the « Save » button and set the « save » function, wait for the file directory of the “USB memory device” is displayed.

Note : If the USB device is not plugged in and we press the «Save» button, the following message is displayed : « USB Flash Drive isn‟t connected !»

6° Press the « New » button, to enter from the keyboard (shift to keyboard)

the name of the new setup file to save, the maximum width allowed is 8 characters

Example : To enter the name « dox3302s » select one by one the characters (using the Universal knob or the buttons “→” and “←”) and press the

« Enter » button for each selected character.

7° Press the «Switch to keyboard» button to switch to «Switch to Name» 8° Press the « Enter » button to save the Setup file: “dox3302S”

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Functional Description

90 4-Channel SPO Digital Oscilloscopes

9° The Setup file « dox3302s » is saved in the USB memory device as

dox3302s.SET

To Recall a Setup file

We can « recall » a setup file from an internal or an external memory.

To Recall a Setup file from an internal or external memory

To Recall a Setup file from the oscilloscope internal memory

1° Press the « Save/Recall » button to open the SAVE/RECALL menu. 2° Press the « Type » button and select « Setups » 3° Select Save to «Internal»

4° Select a Setup N° location among the 20 available 5° Press the « Recall » button to recall the selected Setup file; wait for the message «Read Data success» Note : If the selected « setup N° » corresponds to an empty location the

following message is displayed : « Location Empty ! » To Recall a Setup file from an external memory (USB memory device

plugged in the « USB host » front panel connector) : 1° Press the « Save/Recall » button to open the SAVE/RECALL menu

2° Press the « Type » button and select « Setups »

3° Select Save to « External »

4° Plug the USB memory device in the USB host connector and wait for the

USB device icon and the Popup message « USB Flash Drive Plugged

in ! ». 5° Press the « Recall » button and wait for the file directory of the “USB

memory device” is displayed. 6° Use the Universal knob to select the .SET file to recall 7° Press the « Load » button to recall the selected setup file and wait for the

message «Read Data success» .

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Functional Description

4-Channel SPO Digital Oscilloscopes 91

Functional Description

VII - SAVE/RECALL System (cont‟d)

Rename

We can Rename an existing Setup file

1° Press the « Save/Recall » button to open the SAVE/RECALL menu

2° Press the « Type » button and select « Setups »

3° Select Save to « External »

4° Plug the USB memory device in the USB host connector and wait for the

USB device icon and the Popup message « USB Flash Drive Plugged

in ! ». 5° Press the « Recall » button and wait for the file directory of the “USB

memory device” is displayed

6° Select the file to Rename 7° Press « Next Page » button 8° Press the « Rename » button 9° Modify the file name using the buttons and the Universal knob: « Switch

to Name », « Universal knob», « Delete », « switch to keyboard », « Universal knob », « Enter », « Switch to Name », « Enter », « Confirm » or « Cancel »

Delete

We can delete a file in a directory:

1° Press the « Save/Recall » button to open the SAVE/RECALL menu

2° Press the « Type » button and select « Setups »

3° Select Save to « External »

4° Plug the USB memory device in the USB host connector and wait for the

USB device icon and the Popup message « USB Flash Drive Plugged

in ! ». 5° Press the « Recall » button and wait for the file directory of the “USB

memory device” is displayed

6° Select the file to Delete 7° Press the Delete button 8° Press the « Confirm » or « Cancel » button to delete or not the selected

file.

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Functional Description

92 4-Channel SPO Digital Oscilloscopes

Functional Description

VII - SAVE/RECALL System (cont‟d)

2. Save/Recall Waveforms

Waveforms are saved only in external memory, therefore before saving or

recalling a waveform plug the USB memory device in the “USB host” front

panel connector of the oscilloscope.

You can save a « waveform » only in an external memory.

The saved waveform can be recalled and displayed on the oscilloscope screen.

To « SAVE or RECALL » a « Waveform » you need an USB memory device.

Option

Settings

Description

Type

Waveform

Menu de « Sauvegarde/Restauration » des Traces

Save

External memory

Save waveforms in an external memory (USB memory device plugged in the USB host connector of the oscilloscope).

Recall

External memory

Recall saved waveforms .DAV files

2.1 Saving / Recalling

Waveforms

Press the Save or Recall buttons to open the submenus « Save » or « Recall » waveforms. Both submenus have the same functionality : 1° You are able to modify a « File » or a « Directory ». 2° You are able to save waveforms in a New file 3° You can Delete a selected file. 4° You are able to Load a waveform file (.DAV) from an USB device 5° You can Rename a file.

Notes : Waveforms are saved in .DAV files When a waveform is saved or recalled the acquisition is stopped.

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Functional Description

4-Channel SPO Digital Oscilloscopes 93

Press the « Save » or « Load » buttons to open the SAVE or RECALL submenus, both submenus have the same functionality :

Option

Settings

Description

Modify

Files Directory

to modify files or directories

New

Press the “New” button to enter the file name using the “Universal” knob or the buttons “→” and “←”.

Delete

To delete the selected file.

Load

To load and display the selected file.

1/2

To open page 2/2

Rename

To rename an existing file

Return

To return to the main Save/Recall menu

2/2

To open page ½

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Functional Description

94 4-Channel SPO Digital Oscilloscopes

Functional Description

VII - SAVE/RECALL System (cont‟d)

Save a Picture

The oscilloscope can save a screen copy (« Picture ») in a external memory. The oscilloscope can’t recall a picture file (.BMP) .

Saving a screen

copy « Picture »

To save a screen copy (« Picture ») as a .BMP file

1. Press the "Save/Recall" button to open the SAVE/RECALL menu.

2. Press the "Type" button and select "Picture"

3. Press the "Save" button to open the Save sub-menu.

4. Press the « New » button and enter the picture file name .BMP using the Universal knob or the buttons “→” and “←”.

5. Confirm the Name to save the picture.

Notes : 1° A Picture must be saved in an external memory. 2° A Picture file (.BMP) can’t be open by the oscilloscope, use for example

the “Paint” PC software to open it.

Picture save

and recall menu

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Functional Description

4-Channel SPO Digital Oscilloscopes 95

Functional Description

VII - SAVE/RECALL System (cont‟d)

2.2 Saving a screen copy

(Picture)

To save a screen copy in an external memory : Open the SAVE/RECALL menu and select the Picture type, press the «Save»

button to open the Save submenu to save a screen copy .BMP.

Option

Settings

Description

Type

Picture

Save a « Picture» file.

Save

Press the « Save » button to open the save menu.

Submenu « Save » « Picture »

Option

Settings

Description

Modify

File Directory

To modify a file or a directory

New

To create a new screen copy (picture) file press the « New » button to open the New file submenu. Enter the file name (.BMP) using the Universal knob or the buttons “→” and “←”.

Delete

Press this button to delete the selected file

1/2

Press this button to open page 2/2

Rename

Press this button to rename an existing file

Return

To return to the main menu

2/2

To open page ½

To enter the picture file name first press the « Switch to Keyboard » button (to “switch to name”) and then press the “Enter” button

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Functional Description

96 4-Channel SPO Digital Oscilloscopes

Functional Description

VII - SAVE/RECALL System (cont‟d)

Saving CSV files

The CSV files must be saved in external memory. The CSV files can’t be opened in the oscilloscope. The CSV files can be opened in table software “EXCEL”.

1. Open the "SAVE/RECALL" menu and select the file type: "CSV" .

2. Plug the USB memory device in the «USB host» connector and wait for the USB device icon and the Popup message « USB Flash Drive

Plugged in”.

3. Press the « Para Save » button to set : "On" or "Off".

4. Press the "Save" button to open the « Save .CSV file » submenu.

5. Press the « Modify » button and select: "File" or "Directory"

6. Press the « New » button to enter the file name using the Universal knob or the buttons “→” and “←”.

7. Press the « Delete » button to delete the selected file.

8. Press the « Next Page » button

9. Press the « Rename » button to modify the name of the selected file or directory.

10. Press the « Return » Button to return to the main menu.

Notes: 1° The .CSV files can‟t be opened in the oscilloscope. 2° The .CSV files can be opened in EXCEL Warning : The .CSV files generated by the DOX3000, can exceed the size limit allowed by the version of EXCEL (eg limits : 65536 lines for “EXCEL 2003” and 1048576 lines for “EXCEL 2007”). To be able to open the complete file, set the maximum memory depth of the oscilloscope less than the limit of the EXCEL version (examples : 14kpts for “EXCEL 2003” or 700kpts for “EXCEL 2007”).

If the file exceeds the limit, the following « PopUp » message appears :

Click « OK » to display the lines allowed by the EXCEL version, starting from line N°1 to the imposed limit value:

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Functional Description

4-Channel SPO Digital Oscilloscopes 97

Menu Save

Type CSV

Submenu

« Save» « New »

.CSV file

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Functional Description

98 4-Channel SPO Digital Oscilloscopes

Functional Description

VII - SAVE/RECALL System (cont‟d)

Restoring the «Factory Settings»

(Default Setup)

Press the « Default » button to restore the « Default Setup » :

Display obtained after restoring the « default

setup »:

Channel CH1

Sensitivity: 1V/div,

Probe factor: 1X,

Impedance: 1MΩ,

Coupling: DC, BW

Limit : Full Time Base:

1µs/div

Restoring Waveforms

Waveform files must be saved in external memory (USB memory device). To restore a waveform plug first the USB device in the « USB host »

connector of the oscilloscope front panel

1° Plug the USB memory device in the «USB host» connector and wait for the USB device icon and the Popup message « USB Flash Drive Plugged

in”.

2° Press the « Save/Recall » button to open the SAVE/RECALL menu 3° Press the « type » button and select Waveforms 4° Press the « Recall » button and wait for the contents of the « USB memory

device » is displayed on the screen 5° Use the Universal knob to select the waveform file « .DAV » to be displayed

on the screen 6° Press the « Load » button to restore the selected waveform file 7° Wait until the selected waveform is displayed on the screen Notes : 1° When the saved waveform is displayed the acquisition stops. The displayed

values of the time base coefficient, the sampling rate, and the memory depth correspond to the restored waveform. To refresh the display of vertical

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Functional Description

4-Channel SPO Digital Oscilloscopes 99

parameters of the restored waveform you must press the corresponding “CHi” button.

2° We can perform automatic or cursors measurements. 3° If we « Run » new acquisitions by pressing the « Run/Stop » button, the

restored waveform is cleared and replaced with the new acquire waveform. Warning : The new acquisitions are done with the settings corresponding to the restored waveform.

In the example below we provide : 1° The initial configuration of the oscilloscope before restoring the saved

waveform.

2° The configuration corresponding to the restored waveform 3° The configuration after « Running » new acquisitions

Initial

Configuration :

Channels CH1 and

CH2 actives,

Sensitivity 1V/div,

BdT 1.0µs/div

The restored

waveform on CH3 :

the S/div coefficient

= 20µs/div is

automatically

refreshed but not the

vertical parameters

of the restored

waveform

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Functional Description

100 4-Channel SPO Digital Oscilloscopes

To refreshed the

vertical parameters of

the restored (CH3)

waveform you must

press a « CHi »

button.

If we « Run » new

acquisitions by

pressing the

« Run/Stop » button,

the restored

waveform is cleared

and replaced with the

new acquire

waveform. The new

acquisitions are done

with the settings

corresponding to the

restored waveform.

(The initial

configuration is lost)

Metrix DOX3104, DOX3304 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual