Metrix MTX 3352, MTX 3252, MTX 3252-C, MTX 3352-C Operating Instructions Manual

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mtxmtx 3252 3252 Monochrome - mtxmtx 3252-C 3252-C Colour

33523352

mtxmtx 3352 3352 Monochrome - mtxmtx 3352-C 3352-C Colour

Pôle Test et Mesure de CHAUVIN-ARNOUX

Parc des Glaisins - B. P. 330

6, avenue du Pré de Challes

F - 74943 ANNECY-LE-VIEUX Cedex

Tel. +33 (0)4.50.64.22.22 - Fax +33 (0)4.50.64.22.00

X02414A00 - Ed. 1 - 01/03

Contents

General instructions Chapter I

Introduction.....................................................................page 4

Precautions and safety measures..........................................4

Symbols used.........................................................................5

Guarantee................................................................................5

Maintenance and metrological checking................................5

Unpacking - Repacking...........................................................5

Maintenance............................................................................5

Description of instrument Chapter II

Presentation...................................................................page 6

General view ...........................................................................6

Front panel (illustration)..........................................................7

Measurement terminal block (illustration)...............................7

Rear view (illustration).............................................................8

Front panel (description).........................................................9

Keys ......................................................................................10

Oscilloscope Mode Chapter III

Display..........................................................................page 14

Menus

"Vert" Vertical menu........................20

"TRIG" Trigger menu........................24

"Horiz" Horizontal menu........................26

"Display" Display menu........................31

"Measure" Measurement menu........................33

"Memory" menu........................38

"Util" Utilities menu........................41

"?" Help menu........................45

“Harmonics” Mode Chapter IV

Display..........................................................................page 46

Menus

"Vert" Vertical menu........................49

"Horiz" Horizontal menu........................52

"Display" Display menu........................53

"Memory" menu........................53

"Util" Utilities menu........................54

"?" Help menu........................54

Functional Description Chapter V

Preparation for use .......................................................page 55

Applications...........................................................................56

I - 2 Two-channel digital oscilloscope

Contents

Technical Specifications Chapter VI

Vertical deflection.........................................................page 63

Horizontal deflection (time base)..........................................64

Trigger circuit........................................................................65

Acquisition chain...................................................................65

Display...................................................................................66

Miscellaneous .......................................................................66

Communication interfaces....................................................67

Remote programming...........................................................67

General characteristics Chapter VII

Environment.................................................................page 68

Mains power supply..............................................................68

EMC.......................................................................................68

Mechanical characteristics Chapter VII

Casing .........................................................................page 68

Packing..................................................................................68

Supply Chapter VII

Accessories..................................................................page 69

G The content of this manual may not be reproduced in any form without the agreement of

the manufacturer.

Two-channel digital oscilloscope I -

General instructions

•

General instructions

Introduction

Precautions and safety measures

definition of

installation

categories

(cf. IEC 664-1)

You have just acquired a two-channel digital oscilloscope. It also features a « harmonic analyser » mode and a « recorder » mode (pending).

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 (2001), single insulation, relative to electronic measurement instruments. 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 the equipment and/or its components. This could be dangerous to the user.

• 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 included between 0°C and 40°C

- with relative humidity of less than 80% to 40°C.

It can be used for measurements on circuits at 150V CAT II (300V CAT I, 300V

CAT II), relative to ground and can be supplied by a 240V CAT II network.

CAT I : CAT I circuits are protected by devices designed to minimize transient

overvoltages at a low level. E.g.: protected electronic circuits

CAT II : CAT II circuits are domestic or similar equipment power supply circuits

that can include average value transient overvoltages. E.g.: power supply to domestic appliances and portable tools.

before use

during

use

CAT III : CAT III circuits are circuits for power equipment power supplies which

may include high transient overvoltages. E.g.: machine or industrial apparatus power supply.

CAT IV : CAT IV circuits are circuits that can include very high transient

overvoltages. E.g.: energy inputs

• Comply with environment storage conditions.

• Make sure that the three-wire phase/neutral/ground power supply cord

supplied with the unit is in suitable condition. It conforms to standard NF EN 61010-1 (2001) and must be connected to the instrument on the one hand, and to the network on the other (variation from 100 to 240 VAC).

• Read carefully all the notes preceded by the symbol .

• Connect the instrument to an outlet with a ground pin.

• The instrument power supply has automatically reset electric protection

operating after the fault has been eliminated.

• 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.

I - 4 Two-channel digital oscilloscope

General instructions

Symbols used

Guarantee

Caution: Danger risk. Refer to the operating instructions.

Earth

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, the equipment may only be repaired by the manufacturer. He reserves the right 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:

• unsuitable use of the equipment or by association with incompatible

equipment

• modification of the equipment without the explicit authorization of the

manufacturer technical services

• operation by a person not approved by the manufacturer

• adaptation to a specific application not provided for in the equipment

definition or in the operating instructions

• impact, fall or flooding.

Maintenance and metrological checking

Unpacking and repacking

Before the equipment is opened , it must be disconnected from the

network supply and the measurement circuits, and the operator must not become charged with any static electricity. This could cause the destruction of internal parts.

Any adjustment, maintenance or repair of the energized equipment shall only be undertaken by qualified personnel, after referring to the instructions given in this document.

A qualified person is a person who is familiar with the installation, construction, use and the hazards that exist. This person is authorized to start up and shut down the installation and equipment in conformity with the safety rules.

Return your instrument to your distributor for any work to be done within or outside the guarantee.

All the equipment has been checked mechanically and electrically before shipping.

On reception, carry out a quick check to detect any damage caused by transport. If necessary, contact our commercial department immediately and make all legal reservations with the carrier.

In the event of reshipping, it is preferable to use the original package. Indicate as clearly as possible, by a note attached to the equipment, the reasons for the return.

Servicing • Turn the instrument off.

• Clean it with a damp cloth and soap.

• Never use abrasive products or solvents.

• Allow to dry before any further use.

Dual trace digital oscilloscope I - 5

Description of instrument

mtx 3252 mtx 3352

Harmonic

analyser

Presentation

This instrument is part of the new MTX range and has the particularity of

Oscilloscope

Recorder

grouping together three units in one:

• a digital oscilloscope incorporating the FFT function, intended to

analyze the signals appearing in the electronics and electrotechnical fields

• a harmonic analyser mode for breaking down two signals

simultaneously while representing their fundamental and their first 31 harmonics

• a recorder mode (pending) intended for the capture of single or slow

signals.

The instrument works at a constant acquisition depth of 50,000 points. Memory management is organized from a system of files.

A large-size colour (or monochrome) LCD screen displays the applied signals, together with all the adjustment parameters.

The main control functions are accessible directly from the front panel. The adjustment parameters can be modified using the thumbwheel.

A graphic interface is similar to that of the PC and is used for:

• using the mouse to select the functions proposed by the pull-down

menus

• acting directly on objects (traces, cursors, etc.) displayed on the screen.

The adjustment parameters can thus be modified by a variety of means. This instrument is completed by RS232/CENTRONICS interfaces as standard.

Description of instrument

Overall view

II - 6 Two-channel digital oscilloscope

Description of instrument

Description of instrument (cont’d)

Front panel (illustration)

Measurement terminal block

CH1 signal input EXTernal trigger input

CH2 signal input Calibration output

Two-channel digital oscilloscope II - 7

Description of instrument (cont’d)

SUBD 25-pin SUBD 9-pin

Mains

connector

Rear panel

Description of instrument

female connector for

RS232/CENTRONICS

interfaces

II - 8 Two-channel digital oscilloscope

male connector for

serial mouse

Description of instrument

Description of instrument (cont’d)

Front panel

(description)

1 startup / standby

button

1 mouse / 2 keys

The main features of the equipment can be obtained from the front panel. They can also be modified directly by the mouse or using the menu toolbar.

activates:

• startup (green LED) when pressed briefly.

• Setting the oscilloscope to standby (red LED) by a long press (> 3 s).

The files and the configuration are saved.

connected to the back of the oscilloscope (SUBD9 connector for serial mouse), used for: selection of menus,

function validation, movement of symbols appearing on LCD screen.

• The menus appearing at the top of the screen and the submenus

selected by the mouse pointer open and are validated by the left key.

• The menus in the trace display zone

in the control zone in the status zone

are opened with the right mouse key.

• The mouse can be used for moving:

symbols appearing in the main display zone:

trigger position, cursor position, display trace reference

symbols appearing in the bargraph:

trigger position, zoomed area cursor position

Position the mouse pointer on the symbol to be moved, holding the left key of the mouse down during the movement to the desired position.

1 rotary control

button

21 fleeting action

keys

• Zooming in the display zone is possible using the mouse:

hold the left key down when defining the zone with the pointer.

• The outer wheel of this encoder is used for incrementing or

decrementing the selected setting (by rotation).

• The LED comes on when adjustment is possible using the wheel. After

20 seconds without action on the wheel, the LED goes out and the function is no longer active.

• While the LED is on, pressing the central part of the encoder

(TOGGLE key ) will toggle the adjustment of the main function to the secondary function of the key. The Symbol : appears on the

keys concerned (except for the key opposite).

giving direct access to the more basic functions.

Two-channel digital oscilloscope II - 9

Description of instrument (cont’d)

depressed key (except for the key ??).

Keys

Pressing this key will configure the instrument in the following modes:

« oscilloscope», « harmonic analyser » or « recorder » (pending).

4 «UTILITY» keys

used for access to the LCD contrast adjustment using the thumbwheel. The LED combined with the thumbwheel comes on à adjustment is accessible. The thumbwheel TOGGLE key is used for switching the key assignment from

contrast adjustment to LCD brightness. Pressing causes switchover from normal display mode to "full screen" display

mode (and vice versa). The screen is organized in such a way as to leave an optimum trace plotting surface area:

deletion of menu bar,

parameters of traces in time base, bargraph.

Only permanent adjustments and measurements will remain.

Description of instrument - Keys

1 «AUTOSET» key

Selective

«AUTOSET»

with

launches a hardcopy depending on the configuration produced in the « Util » and « Hardcopy » menus.

A second press before the process end will interrupt current printing. If printing is impossible, a « Printing error » message will be sent.

The « » symbol is displayed in front of the measurement display zone when printing is underway.

The first press will freeze the traces on the screen. They will be displayed in plain language as a reference to be compared with further acquisition. A second press will erase them: the latter will then be lost.

• Traces will be saved only in the « Memory à Trace à Save » menu.

• The reference memory will be accompanied by a reference Nr.

used on channels to which a signal is applied to obtain optimum automatic adjustment (General Autoset) of coupling, vertical sensitivity, time base, slope, framing and trigger.

The lowest frequency signal is used as a triggering source. If no trace is detected at the inputs, the autoset will be aborted.

Simultaneously pressing with the CHx key (ch1 or ch2) will assign the corresponding channel as trigger source, initiating an autoset which will take this selection into consideration.

The CHx channel becomes active for adjustments by means of the AC/DC/GND and V /div. V-Pos. keys.

1 help key

II - 10 Two-channel digital oscilloscope

activating or deactivating help on the keys. Whenever a keyboard key is pressed, on-line help will be displayed for the

The functions associated with the keys will not be started up. On-line help can also be deactivated with the mouse (icon at top right).

The keyboard then resumes normal operation.

Description of instrument – Keys

Description of instrument (cont’d)

2 «ACQUISITION»

keys

by successive pressing, select one of the following acquisition modes:

Single mode à Single Trigger mode à Trig’d Automatic mode à Auto

« SINGLE » mode: A single acquisition is triggered by pressing the RUN key. HOLD is authorized.

For any further acquisition, the triggering circuit must be reset by pressing the

RUN HOLD key.

«TRIGGER » mode: The screen content is only refreshed in the presence of a triggering event

related to signals appearing at the oscilloscope (CH 1, CH 2, External or Mains).

2 «TRIGGER» keys

If there is no triggering event linked with the signals appearing at the inputs (or if there is no signal at the inputs), the trace is not refreshed.

«AUTOMATIC » mode: The screen content is refreshed even if the triggering level is not detected on

the signals appearing at the inputs.

In the presence of a triggering event, screen refreshing is managed as in the « Triggered » mode.

• allows starting or stopping of acquisition in « TRIGGER » and « AUTOMATIC » mode.

• resets the triggering circuit in the «Single» mode.

Acquisition is initiated according to the conditions defined by the acquisition mode (SGLE REFR key).

Acquisition status is indicated in the status zone:

RUN = started READY = wait STOP = stopped PRETRIG = before trigger POSTRIG = after trigger

selects the trigger slope (positive or negative ) by successive pressing. The slope is indicated in the status zone.

sets the trigger level to the average value of the signal (50%) without modifying the trigger coupling.

The thumbwheel is assigned to adjusting the trigger level. Combined pressing with the CHx key launches the same function, but

previously sets the corresponding channel as triggering source.

No functions are associated with the TOGGLE key of the thumbwheel.

Two-channel digital oscilloscope II - 11

Description of instrument (cont’d)

3 « MEASUREMENT »

keys

activates or deactivates the display of the window for the 18 automatic measurements of the reference trace.

Combined pressing with the CHx key displays the measurements on the corresponding channel.

When the automatic measurement window is active, the left mouse button is used for selecting at most 2 measurements that will appear in the status zone at the bottom of the screen.

used for selecting (successive pressing) among the displayed traces, the reference trace for the automatic and manual measurements.

Appears in the « Measurement » à Reference menu. activates or deactivates the cursor displays for manual measurements.

The LED combined with the thumbwheel comes on: the latter allows cursor 1 to be moved horizontally over the screen.

The thumbwheel TOGGLE key is used for moving from the cursor 1 to cursor 2 horizontal movements and vice versa.

Description of instrument - Keys

2 «HORIZONTAL»

keys

• The dt measurements made (time difference between the two cursors)

and the dv measurement (voltage deviation between the two cursors) are reported in the status zone.

• The selected cursor position is entered into the active adjustment zone.

used for access to adjustment of time base coefficient (T/div.) by thumbwheel or for adjustment of horizontal position (H-Pos.) by the thumbwheel TOGGLE key.

The LED associated with the wheel lights up à the selected adjustment is possible with this device.

The H-Pos. adjustment modifies the horizontal (time-related) position of the trigger point.

activates or deactivates the « Zoom » function. The LED associated with the wheel lights up: the thumbwheel is assigned

to the horizontal zoom coefficient adjustment. Pressing the thumbwheel TOGGLE key makes it possible to change from

the horizontal zoom coefficient setting to Z-Pos. horizontal movement in the zoomed zone.

A zone can be zoomed by tracing a rectangle around the zone to be enlarged using the left mouse button. The sensitivity, time base and horizontal and vertical alignment values are recalculated automatically.

If no zones to be zoomed are selected with the mouse, a simple horizontal

zoom by default will be performed with respect to the screen center.

II - 12 Two-channel digital oscilloscope

Description of instrument – Keys

Description of instrument (cont’d)

Definition :

Validated channel = Display enable (trace displayed after RUN) Displayed channel = Validated channel and trace on screen Selected channel = Parameter settings enabled for this channel via the

keys:

and .

5 «VERTICAL» keys

Before pressing one of the following keys:

The channel concerned is not displayed.

The channel concerned is displayed, but not selected.

Press

After pressing one of the opposite keys:

The channel is displayed and is selected. The thumbwheel is assigned to sensitivity adjustment.

The channel is selected.

The channel concerned is displayed and selected.

The channel is deselected.

Pressing one of these 2 keys for a long time generates a vertical autoset:

• This modifies the sensitivity and vertical positioning of the wheel in

question.

• It optimizes the display on the screen by activating and selecting the

channel.

The channel is displayed and selected. The thumbwheel adjusts the sensitivity.

activates or deactivates the horizontal division by two, in the display zone. The activated « Full Trace » function is indicated by:

- the presence of a continuous horizontal line in the middle of the display zone

- the horizontal division in two of the graticule.

After the activation of the function:

- traces 1 and 3 are assigned to the upper part of the display,

- traces 2 and 4 are assigned to the lower part in order to eliminate their superimposition.

The traces can then be moved vertically in the two zones. used for selecting, by successive pressing, input coupling « AC », « DC »

or « GND » for the last channel selected. Coupling is indicated in the channel parameters zone: AC : , DC : nothing, ground: GND

Each press will provide access, through the thumbwheel, to the setting of the sensitivity (V/div.) of the last channel selected.

Pressing the T OGGLE key will move from sensitivity adjustment to vertical position adjustment (V-Pos.).

The LED associated with the wheel lights up à adjustment is possible with this device.

Two-channel digital oscilloscope II - 13

Oscilloscope Mode

Direct access to

4. Menu bar

1. Status zone

Display and

Contrast

Display

Oscilloscope Mode - Display

73.0%

Composition The oscilloscope display is divided into 4 functional zones.

current adjustment

3. Display zone

2. Control

zone

III - 14 Two-channel digital oscilloscope

adjustment of current value

Oscilloscope Mode - Display

Position and movement

Position and movement of

manual cursors

Movement of screen to right

Permanent

Representation and

Oscilloscope Mode (cont’d)

1. Status zone

Three types of general information appear in this zone:

• The bargraph represents the screen position, that of the trigger and

• Permanent instrument settings.

• Measurements when the cursors are on the screen (or display of time

Bargraph

Cursor Measurements

Movement to left of screen in

acquisition memory

the cursors in the acquisition memory.

otherwise).

movement of screen in

acquisition memory

of time trigger

adjustments

in acquisition memory

Permanent settings

Cursor measurements

Each bargraph element can be moved via the mouse left button.

This zone refers to the triggering status (mode, front, source, current status).

@ Example : AUTO . 1 STOP

When the cursor of the mouse is placed over this information, the right mouse button will open the "Trigger parameters" menu.

This zone refers either to:

• horizontal (dt) and vertical (dv) difference between 2 cursors in the

case of manual measurements,

• phase measurement in the case of manual phase measurement (Ph).

(@ Example : dv(1) = 500 µs, dv(1) = 2.00 V)

• automatic measurements selected by the "Automatic measurements"

or "Phase measurement" menu.

• time display, if no measurement has been selected.

Two-channel digital oscilloscope III - 15

Oscilloscope Mode (cont’d)

Indication and adjustment of last selected

Display of trace parameters (in trace Display of function parameters (in trace

Display of ZOOM mode

Value of time base coefficient (s/div) in Change of signal representation domain

2. Control zone The parameters displayed in this zone are:

• The parameters of each channel and trace: display,

• The time base value and the loading of the signal representation domain

(FFT)

• The active adjustment of the last selected element:

- trigger level

- trigger time position

- channel offset value

- X & Y position of cursor

- …

Oscilloscope Mode - Display

sensitivity, coupling, bandwidth limit, vertical scale, function, zoom.

color): validity, coupling, bandwidth limit,

sensitivity Display of ZOOM mode

color): validity, value of division

oscilloscope mode or frequency (Hz/div) in FFT mode

Contrast

25.0 %

(FFT selection)

adjustment

G • The mouse left key validates the channels and the functions.

• The « PP » symbol indicates whether a channel or function has been

selected, or whether the FFT mode has been selected.

• The adjustments of the time base (or frequency) and the value of the

active parameter can be made with the UP/DOWN button alongside the current value display using the mouse key button.

• After a change to the time base, the corresponding sampling frequency

is entered into the adjustment zone.

III - 16 Two-channel digital oscilloscope

• When the mouse is placed over the parameters of a channel or time

base value, the right mouse button opens the associated menus directly.

- Sensitivity/Coupling and Vertical scale, for channels

- Vertical scale for the functions

- Source, trigger mode and RUN/STOP, for the time base

Oscilloscope Mode - Display

Oscilloscope Mode (cont’d)

The « Sou rce » and « Trigger mode » menus are grouped together and can be opened using the right mouse button by placing the pointer over the time base zone.

RUN/STOP is used for starting and stopping acquisition from this menu. The acquisition status is indicated in the screen status.

G • The symbol « PP » indicates the source and selected trigger mode

3. Display zone

• The trigger source selectable from this menu is limited to the channels

(ch1 or ch2).

The displayed graphic elements associated with the traces in this zone are:

• a trigger time position indicator

• a trigger level indicator

• a vertical position indicator for the reference level of each trace

• cursor position indicators linked with the curve for automatic

measurements

• cursor position indicators linked or not linked with the curve for manual

measurements

• the selection of a zoom zone

Two-channel digital oscilloscope III - 17

Oscilloscope Mode (cont’d)

345

266v12

Display elements

Oscilloscope Mode - Display

ϕϕ

Definition of display

Items Elements

1 Trace displayed 2 Indication of displayed trace reference level vertical position

Trace affichée

3 Indication of time-related position of trigger 4 Graticule division 5 Automatic measurement cursor position indicator 6 Manual measurement cursor position indicator 7 Phase measurement cursor position indicator

8 Trigger level position indicator 9 Zoom zone selection 10 Time position output indicator of trigger outside displayed

window

11 Trigger level position output indicator outside displayed

window.

12 Channel level output indicator outside displayed window

III - 18 Two-channel digital oscilloscope

Oscilloscope Mode - Display

Oscilloscope Mode (cont’d)

Menu accessible

from display zone

When the mouse pointer is placed in the display zone, the right key gives direct access to a display menu.

The « Full Screen » and « Zoom out » options are directly accessible (see the Display menu). The same applies to the selection of the automatic and manual measurement reference signal (see Measurement menu).

The «üü » symbol indicates that the display is in the « Full Screen » mode (if present) and gives the reference trace for automatic and manual measurements.

Zooming in the display zone is possible using a mouse, holding the left mouse key down when the zone is selected by the pointer.

After zooming in to part of the screen, the sensitivities of the traces and the time base are recalculated.

• The « z » symbol appears in the parameter display of the signals and

the time base.

• The zoomed section is represented in the bargraph.

4. Menu bar

• The « Zoom Out » menu (see Display menu) returns to the original

display.

• The horizontal zoom value is adjusted to assign a calibrated value to

the horizontal scale (zoom factor: x200 max.)

• If the zoom vertical selection is greater than 6 divisions, no vertical

zoom will be performed.

All the symbols appearing in the display zone:

- trigger indicators,

- trace position indicator,

- manual cursor position indicator,

- etc …

can be moved using the left button of the mouse.

The new modified symbol value is entered into the current adjustment display zone.

All the oscilloscope functions can be accessed by the main menus.

Two-channel digital oscilloscope III - 19

Oscilloscope Mode (cont’d)

(∗)

See §. Description, page 44.

The « Vert » Menu

(∗) (∗) (∗) (∗)

Oscilloscope Mode - The « Vertical » menu

Only available in advanced mode

III - 20 Two-channel digital oscilloscope

ch1-ch2

Oscilloscope Mode - The « Vertical » menu

Modifies the sensitivity of the channel using the scroll bar and the left mouse

Oscilloscope Mode (cont’d)

Definition

Display

ch1 ch2

Sensitivity/Coupling

Channel Sensitivity

Coupling

opens the « Trace display » menu for validating or devalidating the traces.

Validation of selections by « OK ». Exit from menu without modification by « Cancel ».

The « PP » symbol in front of a trace indicates its validation.

The traces can be validated or devalidated from the command zone using the left mouse button.

modifies independently the ch1 and ch2 parameters and modifies the selected trace vertical scale.

modifies the selected channel parameters.

button, adjustable by sequence: from 2.5 mV to 100 V/div.

Sensitivity is entered into the channel parameter display zone. It takes the « Vertical scale » menu parameters into consideration.

Modification of the AC - DC - GND coupling GND Coupling: the equipment connects internally the selected

channel input to a 0 V reference level.

The « ¤ » symbol indicates the selected coupling. Coupling is reported in

the modified channel parameter display zone.

BW limit

Vertical scale

Coefficient assigns a multiplication coefficient to the selected channel sensitivity.

limits to 20 MHz the bandwidth of the channel and its trigger circuit to moderate the display noise and the false triggers.

The « PP » symbol indicates that the bandwidth limit is active and « bwl » appears in the modified channel parameters.

Validation of selections by « OK ». Exit from menu without modification by « Cancel ».

This menu can also be called by clicking with the right mouse key in the desired channel parameter display zone.

defines the vertical scale of the channel selected from the current adjustments. Reading and direct measurements of the analyzed magnitude and its unit are obtained.

The modification is made using the mouse with the table of usable numbers, having selected the « Coefficient » zone.

The ß key deletes the previous value of the cursor in this zone. The predefined values (x1, x10, x100, x1000) correspond to standard

probe coefficients and can be assigned directly.

The sensitivity value indicated in the channel parameter display will be

modified according to this coefficient.

Two-channel digital oscilloscope III - 21

Oscilloscope Mode (cont’d)

Measure unit modifies the vertical scale unit of the selected channel.

The modification is carried out by the mouse using the table of characters that can be used after selecting the measure unit zone.

The ß key is used for deleting the character leading the cursor in this zone.

The vertical scale unit will be entered into the modified channel parameter

display.

Init re-initializes the multiplication coefficient at 1.00 and returns to a measure

unit in Volt.

Validation of selections by « OK ». Exit from menu without modification by « Cancel ».

This menu can be called by dialogue with the right mouse button in the display of the desired channel parameters (ch1 or ch2).

Oscilloscope Mode - The « Vertical » menu

math1 math2 math3 math4

Function definition

@ Examples

defines for each trace a mathematical function and the vertical scale. Menus present only in Advanced mode (see menu « Util »).

defines the mathematical function to be assigned to the selected trace. The function is defined using the usable characters table, and associating

the ch1 and ch2 traces. Predefined mathematical functions can be associated with the traces:

step (« step ») using the « t » (∗) sin (« sine ») cos (« cosine ») exp (« exponential ») log (« logarithmic »)

(∗) t = sample abscissa: varies from 0 to 50,000 points (screen).

math1 à ch1 ∗ step (t - 10000) : math1 is at 0 V while t < 10,000 points.

math1 = ch1 when t > 10,000 points.

math1 à ch1 + div(1): for adding a division to the ch1 trace. math1 à ch1 ∗ step (10,000 - t) : math1 = ch1 while t < 10,000 points.

math1 is at 0 V when t > 10,000 points.

math1 à sin (pi ∗ t / 20,000) ∗ exp (- t / 10 000) ∗ div(4) : absorbed sine

div (« division »)

equation

mathx cannot be used in the definition of a function. The drafted functions

can be backed up and called up later by the icons « Save » and « Recall » (see §. Memory).

III - 22 Two-channel digital oscilloscope

Oscilloscope Mode - The « Vertical » menu

Oscilloscope Mode (cont’d)

Save

Recall

Reset

Vertical scale defines the vertical scale of the selected trace.

Opening menu from

math3, math4

Coefficient modifies the value of a selected trace division (div).

backs up the definition of the function by the “File Copy “ menu. Extension «.FCT».

calls up the definition of a function recorded as a file «.FCT». deletes the character preceding the cursor in the window. completely resets the function definition.

Validation of selections by « OK ». Exit from menu without modification using « Cancel ».

After assigning a function to the ch1 (math1) or ch2 (math2) channels, « mathx » appears in the corresponding channel parameter display zone.

Calling this menu from math1, math2 is identical to calling ch1, ch2.

Modification is by using the mouse with the table of numbers that can be used after selecting the coefficient zone.

The ß key deletes the character preceding the cursor in this zone.

Measure unit

G The vertical scale unit will be entered into the modified trace parameter

Init

Predefined values (x1, x10, x100, x1000) correspond to standard probe coefficients and can be assigned directly.

The value of a division will be entered into the display of the modified trace parameters.

modifies the unit of the vertical scale (div) of the selected trace. Modification is performed by means of the mouse with the table of

characters that can be used after selecting the management unit zone. The ß key deletes the value preceding the cursor in this zone.

display (3 characters max).

re-initializes the coefficient at 1,000 and returns to a unit of measure in div.

Validation of selections by « OK ». Exit from menu without modification by « Cancel ».

The « Vertical scale » menu can also be called up by clicking with the right mouse key in the trace parameter display math3 or math4 as desired.

Two-channel digital oscilloscope III - 23

Oscilloscope Mode (cont’d)

The « TRIG » Menu

Oscilloscope Mode - The « Trigger » Menu

Definition

Parameters

used for selecting the « trigger parameters »:

Source used for selecting one of the 4 sources as trigger signal.

CH 1 Synchronization by channel CH 1 CH 2 Synchronization by channel CH 2

External Synchronization by external source connected to the front

panel BNC EXT plug

Mains Synchronization by power supply signal (mains)

The trigger source is indicated at the bottom of the screen in the status zone (1: Channel CH1 ; 2 : Channel CH2 ; E : External; S : Mains).

Synchronization by channel CH1 or CH2 may also be called by clicking with the right mouse key in the time base display zone.

Coupling used for selecting one of the trigger source filters:

AC AC coupling (10 Hz to 100 MHz) : blocks the continuous

signal component

DC DC coupling (0 to 100 MHz): allows the entire signal through LF Reject Reject of source signal frequencies < 10 kHz (facilitating

observation of signals having a DC component)

HF Reject Reject of source signal frequencies > 10 kHz (facilitating

observation of signals having high frequency noise)

TV-frame Triggering synchronization pulse for TV frame TV-line Triggering of TV line pulse. Recommended scan coefficient

for examining a TV line: 0.5 µs to 20 µs/div.

III - 24 Two-channel digital oscilloscope

Oscilloscope Mode - The « Trigger » Menu

Oscilloscope Mode (cont’d)

Edge/polarity used for selecting trigger edge:

+ ascending trigger edge

- descending trigger edge

G The selected trigger edge is entered into the status zone.

Trigger level

Noise reject By default, the trigger circuits operate with hysteresis of ½ division. This

used for modifying with mouse by adjusting trigger level on the scroll bar (Trigger).

The trigger level is entered into the current value display zone after

modification. It can be adjusted accurately.

option brings hysteresis to 1 division.

G The « üü » symbol indicates that the noise rejection mode is active.

The « ¤ » symbol indica tes the selected parameters.

Validation of selections by « OK ». Exit from menu without modification by « Cancel ».

This « Trigger parameters» menu can also be called up by clicking with the right mouse key in the trigger adjustment display.

Trigger mode The 3 following selections define the trigger mode:

Triggered mode Automatic mode

used for acquisition and refreshing the screen on each trigger event. used for acquisition and automatic refreshing of screen even when there is

no trigger event. Visible traces, even when there is no trigger event.

Single mode

Two-channel digital oscilloscope III - 25

used for acquiring signal and refreshing the screen on the first trigger occurring after a trigger reset by pressing the key opposite (or by the time base menu).

• The « PP » symbol indicates the selected trigger mode.

• The selected trigger mode is entered into the status zone (Trigger,

Auto, Single).

• The acquisition state is indicated in the status zone: STOP, RUN,

PRETRIG, POSTRIG, READY….

This selection can also be called up by clicking in the time base display zone with the right mouse key.

Oscilloscope Mode (cont’d)

The « Horiz » Menu

(∗)

Oscilloscope Mode - The « Horizontal » Menu

(∗) Only available in advanced mode.

See §. Description, page 44.

Definition

min/max Acquisition

Averaging

allows the signal to be sampled at high frequency (50 MS/s), even for slow time base speeds. The display does not take extreme value samples into consideration.

This mode is used for:

• detecting wrong representation due to under-sampling

• displaying short-term events (Glitch, ≥ 20 ns).

Whatever time base is being used, the short-term events (Glitch , ≥ 20 ns) will be displayed.

The « PP » symbol indicates the « min/max Acquisition » mode is active.

This menu is used for selecting a coefficient to calculate an average for the displayed samples. For instance, this is a way of attenuating random noise observed in a signal.

No averaging Average rate 2 Average rate 4

Average rate 16 Average rate 64

III - 26 Two-channel digital oscilloscope

The averaging coefficient are: no averaging

averaging by 2, 4, 16, 64.

Oscilloscope Mode - The « Horizontal » Menu

Oscilloscope Mode (cont’d)

The calculation is made using the following formula:

FFT (Fast Fourier Transform)

Pixel N = Sample *1/Average rate + Pixel with: SampleValue of new sample acquired at abscissa t

Pixel N Ordinate of pixel of abscissa t on screen, at moment N Pixel N-1 Ordinate of pixel of abscissa t on screen, at moment N-1

The « PP » symbol indicates the selected average rate.

(1-1/Average rate)

N-1

This menu is used for selecting calculation of the Fast Fourier Transformer in « real time » (FFT).

The Fast Fourier Transform (FFT) is used for calculating the discrete representation of a signal in a frequency domain from its discrete representation in the time-related domain.

The FFT can be used in the following applications:

• measurement of various harmonics and distortion of signal,

• analysis of pulse type response,

• search for noise source in logic circuits.

The FFT is calculated at 2500 points.

The Fast Fourier Transform is selected by the FFT icon in the command zone.

When the curve is zoomed, the FFT applies to the zoom part of the curve.

Description The Fast Fourier Transform is calculated according to the equation:

−

X (k) =

1 2

x n j

* ( )*exp −

∑

=−

 





for k ∈ [0 (N – 1) ]





with: x (n): a sample in the time-related field

X (k): a sample in the frequency-related field N: resolution of FFT n: time-related index k: frequency-related index

The displayed trace represents the amplitude in V or dB of the various signal frequency components depending on the selected scale.

The signal continuous component is deleted by software.

Two-channel digital oscilloscope III - 27

Oscilloscope Mode (cont’d)

Square signal on ch2 of 10 kHz and 5

FFT with a rectangular window and a

FFT with Hanning window and

Oscilloscope Mode - The « Horizontal » Menu

Vpp

logarithmic scale

∗ ∗ FFT units

Horizontal unit: indicated instead of time base; calculated according to the scan factor:

Unit (in Hz/div.) =

Vertical unit: two possibilities are offered by sub-menus:

a) Linear scale: by selecting the FFT menu, then the linear scale

• in V/div.=

b) Logarithmic scale: by selecting the FFT menu, then log scale (logarithmic)

• in dB/div.: by attributing 0 dB to a signal having 1 effective amplitude division in time-related representation.

The vertical position indicator of the representation is at -40 dB.

12,5

scan factor

signal unit in time-related representation (V/div.)

linear scale

∗ Graphic representation

The FFT representation indicates symmetry compared to the frequency origin; only positive frequencies are displayed.

III - 28 Two-channel digital oscilloscope

• The « PP » symbol, appearing before one of the options indicates the

selected scale.

• Manual measurements (dt, dv) can be made using cursors for a

frequency representation (see §. Menu « Measurement »).

• The choice of scale appears directly on selection of the FFT menu.

Oscilloscope Mode - The « Horizontal » Menu

Oscilloscope Mode (cont’d)

The sub-menus are used for selecting a type of window.

Rectangular

Hamming

Hanning

Blackman

Before calculating the FFT, the oscilloscope weights the signal to be analyzed by a window acting as a bandwidth filter. The choice of window type is essential to distinguish between the various beams of the signal and to make accurate measurements.

Time-related representation of signal to be analyzed

Weighting window

Weighted signal

Frequency representation of signal calculated by FFT

Two-channel digital oscilloscope III - 29

Oscilloscope Mode (cont’d)

The final duration of the design interval results in a convolution in the signal frequency domain with a function sinex/x.

This convolution modifies the graphic representation of the FFT because of the side lobes characteristic of the sinex/x function (unless the interval of design contains an integer of periods).

Four types of window selections are available: the menus appear directly on selection of the FFT menu.

Oscilloscope Mode - The « Horizontal » Menu

Window type Main lobe

width

Rectangular window - 13 dB Hanning window - 32 dB Hamming window - 43 dB Blackman window - 94 dB

Max. amplitude of side

lobe (compared to main

lobe) 4 π /N 8 π /N 8 π /N

12 π /N

Effects of under-sampling in frequency representation: If the sampling frequency is not correctly adjusted (less than or twice the

maximum frequency of the signal to be measured), the high frequency components will be under-sampled and appear in the graphic representation of the FFT by a state of symmetry (reployment).

• The « Autoset » function is activated. It is a way of avoiding the above

phenomenon and adjusting the horizontal scale: the representation is more legible.

• The « Zoom » function is active.

The « PP » symbol appears in front of one of the options, indicating the selected function.

III - 30 Two-channel digital oscilloscope

Oscilloscope Mode – The « Display » Menu

Oscilloscope Mode (cont’d)

The « DISPLAY » Menu

(∗)

Definition

Graticule Display modes

Envelope

Zoom off

(∗) Only available in advanced mode.

See §. Description, page 44.

Used for displaying grid or not. There are two available display modes:

Vector

A vector is traced at the centre of the sample. The minimum and maximum observed on each horizontal position of the

screen are displayed. This mode is used to display drifting in time or modulation.

The “PP ” symbol indicates that the display mode is active.

Initiates return to the original screen size, after zooming in on part of the screen.

• This function is inactive unless the screen is in zoom mode.

• The letter Z in the trace parameter and time base zone denotes the

zoom mode.

This menu can also be called up by clicking with the mouse right key inside the trace display zone.

Two-channel digital oscilloscope III - 31

Mode Oscilloscope (cont’d)

Oscilloscope Mode - The « Display » Menu

Full screen

Oscilloscope

causes changeover from the normal display mode to the “full screen” display mode and vice versa.

The display is organized so as to leave the biggest surface area possible for trace plotting: only the permanent settings and the automatic or manual measurements remain

• This function has the same effect as the key.

• The “PP ” symbol indicates that the full screen mode is active.

This function can also be called up by clicking with the mouse right button in the trace display zone.

The following submenus make it possible to change from oscilloscope to XY mode.

The “PP” symbol indicates the active mode.

This is the basic operating mode.

The “XY source” menu is used for assigning the desired traces to the X axes (horizontal) and Y axes (vertical).

@ Example

Validation of selections by “OK”. Exit from menu without modification by “Cancel”.

• Each axis is graduated into 8 divisions.

• The selected traces are identified by a figure corresponding to their

axis.

• The “••” symbol indicates the trace selected for each axis. Two sinusoidal signals assigned to the X and Y axis with an offset of π/2

are then represented by a circle.

III - 32 Two-channel digital oscilloscope

Oscilloscope Mode - The « Measurement » menu

(∗)

Oscilloscope Mode (cont’d)

The « Measure » Menu

(∗)

Definition

Reference

Automatic measurements

Trace 1 Trace 2 Trace 3 Trace 4

Only available in advanced mode.

See §. Description, page 44.

used for selecting one of the active traces on which you want to make automatic or manual measurements.

Only the active traces can be selected. Inactive traces appear lighter.

The « PP » symbol indicates the reference trace.

used for opening the « automatic measurements » menu. The measurements are made and refreshed on the selected reference

trace. All the measurements that can be made on this trace are displayed.

(- . - -) is displayed for the measurements that cannot be made. The window can be closed and validated by clicking on OK with the

mouse left button. The one or two selected measurements will be displayed in the status zone.

Two-channel digital oscilloscope III - 33

Oscilloscope Mode (cont’d)

difference

G • It is possible to select two permanent measurements.

• The « PP » symbol indicates the measurement(s) that will be entered

into the status zone.

• Activating automatic measurements reveals two cursors (+) on the curve at the beginning and end of the period, if at least one period is visible on the screen.

• The display order corresponds to the chronological order of the selection.

Deleting automatic measurements in the status zone is carried out using this menu, by erasing the selected measurements (no « PP » symbol in the automatic measurements table).

Oscilloscope Mode - The « Measurement » Menu

Reference memory

@ Example

18 automatic

measurements

Vmin

Vmax

Vpp

Vlow Vhigh Vamp

Vrms

Vavg

Over+

trise

tfall

W+

W-

Pulses

Over-

The activation of the "Reference memory difference" option is a way of calculating the deviations for all the automatic measurements between the selected trace and the memorized reference trace (see §. Memory Menu).

Calculation made and displayed on one of the 18 measurements:

Vpp (Reference memory difference ) = Vpp (Trace 1) – Vpp (Trace 1 à Ref 1)

For all the measurements, calculation is made in the same way.

• This option is only active if a reference trace is present. It has to

correspond to the trace on which automatic measurements are to be made (@ E.g.: Trace 1 and Trace 1 à Ref. 1).

• Condition: the reference trace must have the same characteristics as

the associated trace (sensitivity and time base).

minimum peak voltage maximum peak voltage peak-to-peak voltage established low voltage established high voltage amplitude rms. voltage mean voltage positive overflow rise time fall time positive pulsewidth (at 50 % of Vamp) negative pulsewidth (at 50 % of Vamp) period

frequency cyclic ratio number of pulses negative overflow

III - 34 Two-channel digital oscilloscope

Oscilloscope Mode - The « Measurement » menu

Oscilloscope Mode (cont'd)

Measurement conditions

Automatic measurement presentation

• The measurements are made on the displayed part of the trace.

• Any change to the signal will lead to an updating of the measurements.

They are refreshed in step with acquisition.

• If several signal periods are displayed on the screen, the measurement

will refer to the first.

• To make automatic measurements on specific portions of the signal,

enclose the desired measurement zone with manual cursors and markers identifying the zone.

• Measurement precision is optimum, if two complete signal periods are

displayed

T = 1/F

W+ W-

Vmax Vhigh

Vamp Vpp

100%

90%

50%

Vavg

>5%T

10%

Tfall

t0t1t2 t3t4t5

• Positive overflow = [100 * (Vmax – Vhigh)] / Vamp

• Negative overflow = [100 * (Vmin – Vlow)] / Vamp

i n

• Vrms =

• Vpp =

= value of representing zero Volt

GND

[ (y y ) ]

∑

i n

∑

i 0

−

i 0

(y y )

−

2 1/ 2

GND

Vlow Vmin

>5%TTrise

Two-channel digital oscilloscope III - 35

Oscilloscope Mode (cont'd)

•

Oscilloscope Mode - The « Measurement » Menu

Phase measurement

Trace1 Phase Trace2 Phase Trace3 Phase Trace4 Phase

Manual measurements (dt, dv)

used for making trace phase measurements with respect to a reference trace (See §. Reference Measurement).

This menu selects the trace on which phase measurements are to be made. To deactivate phase measurements, de-select it using the same menu for

the selected phase measurement.

• The « PP» symbol indicates the selected trace for phase measurement. The activation of the phase measurement, if possible, will reveal 3 cursors:

2 automatic measurement cursors on the reference trace,

1 cursor indicating ϕ on the trace, on which the phase measurements are made. These 3 cursors are fixed; they cannot be moved.

• The phase measurement (in °) of the selected trace with respect to the

reference trace is indicated in he measurement display status zone

(@ E.g.: Ph (1/2) = 180°).

• If the measurement cannot be made, « - . - - » appears.

used for making measurements by cursor. The measurement cursors (1 and 2) are displayed as soon as the menu is

activated. The two measurements made are:

dt (time deviation between the two cursors) dv (voltage deviation between the two cursors).

The measurements made and the displayed cursors are linked with the selected reference trace (see §. Reference Measurement).

• The « PP» symbol indicates that the manual measurements (dt, dv) are

active.

• The measurement cursors can be moved directly with the left mouse

button. They can also be moved using the mouse by selecting the symbol

1 (cursor 1) or the symbol 2 (cursor 2) in the bargraph.

• If the free cursor option is not active (see §. Measurement « Unattached

cursors »), the cursors will remain linked to the reference trace during movements. If this option is active, the cursors can be moved anywhere on the screen.

• dt and dv measurements with respect to the selected reference are

indicated in the measurement display status zone.

@ E.g.: dt(1) = 500 µs, dv(1) = 1.00 V

Manual phase measurement

III - 36 Two-channel digital oscilloscope

used for making phase measurements with 3 cursors: 2 identified cursors « 1 and 2 » identical to those of the manual measurements and a 3rd free cursor with respect to which the phase measurement is made (see "Unattached cursors" menu for the movement of cursors "1 and 2").

The « PP» symbol indicates that the manual phase measurement is active.

• When this menu is active, the 3 cursors are present if at least one signal is

active.

• The cursor identified

cursors" menu is not active.

can be moved freely even if the "Unattached

• The phase measurement (in °) between these cursors is indicated in the

measurement display status zone. @ E.g.: Ph = 120.0 °

Oscilloscope Mode - The « Measurement » menu

Oscilloscope Mode (cont'd)

Unattached cursors

Particular case

used for linking or not linking the manual measurement cursors (1 and 2) to the reference trace.

When the "Unattached cursors" menu is selected, cursors 1 and 2 can be moved freely over the screen.

• The « PP» symbol indicates that the "Unattached cursors" menu is

active.

• To deactivate this menu, de-select it with the mouse.

• For automatic measurements and automatic phase measurements, the

cursors are fixed: they cannot be moved. The "Unattached cursors" menu will be inactive.

In the case of "Automatic measurements" and manual measurement activation:

If the manual cursors and automatic markers are displayed together, the automatic measurements will be made on the portion of the trace defined by the manual cursors.

If the portion defined by the manual cursors is too restricted to make the selected automatic measurements [in this case, the fixed markers (+) are not displayed], the selected automatic measurements will be impossible and « -.-- » will appear in the measurement display zone.

De-select the automatic measurements to validate the manual

measurements (dt, dv).

Two-channel digital oscilloscope III - 37

Oscilloscope Mode (cont'd)

trace

The « MEMORY » Menu

Oscilloscope Mode - The « Memory » Menu

Definition

Trace1 àà Ref. 1 Trace2 àà Ref. 2 Trace3 àà Ref. 3 Trace4 àà Ref. 4

used for storing the selected trace in its volatile reference memory (@ E.g.: Trace 1 in Ref. 1).

The 4 traces have their reference memory.

G • For optimum use: the reference trace must have the same characteristics

as the associated trace (sensitivity and time base).

• A trace can only be saved to the reference memory if it is present on the

screen.

• The memorized traces appear in plain language, together with their

reference number.

• The « PP» symbol in the menu indicates that the corresponding trace has

been saved to the reference memory and must be present on the screen.

• A reference trace cannot be moved.

• A reference memory can be deactivated by de-selecting it from the menu.

III - 38 Two-channel digital oscilloscope

Oscilloscope Mode - The « Memory » Menu

Save.TXT

∗

Oscilloscope Mode (cont'd)

Trace This menu is used for saving (to the non-volatile memory) or recalling the

trace of a reference memory. Saving can be in two formats: « .TRC » or « .TXT ».

The « File copy » menu is suited to the type of selected format.

Save .TRC

Saving of the files for recalling on the oscilloscope screen The saving files will take the extension .TRC; they can be recalled in the « Trace à Recall » menu.

saving of files for export to another application Saving files take the extension .TXT; they cannot be recalled by the « Trace

à Recall » menu for screen display. However, they can be exported in a

standard format use in another software (spreadsheet). (@ E.g.: Microsoft EXCEL) using the menu « Util à Files ».

The selection made opens a « File Copy » menu.

∗ Then in the "Source" pull-down menu, select the trace or the reference

memory which is to be recorded.

The trace or the reference memory to be saved will appear in gray. The selection will be made using the left mouse key.

• Only the traces and reference memories on the screen will be entered into

the "Source" menu and therefore be selectable.

• If all the traces and all the reference memories are present on the screen,

the scrollbar to the right of the menu will allow movement through the list.

∗ A default backup file name is proposed above the keyboard. It can be

modified using the "Qwerty" keyboard and the mouse. The ß key is used for deleting the displayed letter preceding the cursor in

this zone.

Once the name has been written, the à key records it by entering it into the

destination menu and closes the menu. The backup file takes the extension .TRC (internal format) or .TXT (text format), in accordance with the previous selection.

Exit from the menu without backup is obtained by clicking with the left mouse key on the icon at the top right of the window.

G • The file name is limited to a maximum of 8 characters + the extension.

• As soon as the mouse pointer id dragged over a destination file (without

clicking), the name is accompanied by its recording date and time, and its size.

• If the name already exists or is not compatible, an error message will

appear.

Two-channel digital oscilloscope III - 39

Oscilloscope Mode (cont'd)

•

Oscilloscope Mode - The « Memory » Menu

Recall.TRC

Configuration used for saving or recalling an equipment configuration.

Save when selected, opens the « File copy » menu.

when selected, opens a « File Copy » menu. In the pull-down Source menu is the .TRC file list recorded using the « Trace

à Recall.TRC » menu.

The file name selected for recalling appears in gray. Selection is made using the left key of the mouse.

∗ After selecting the file to be recalled, the destination menu indicates the trace

on which it should be restored. The selected destination trace (1 to 4), using the mouse left key to restore the signal, appears in gray. It is also indicated in the lower zone of the screen.

∗ The trace to be recalled and its destination are selected, then the à key is

used for performing the operation and closing the menu.

Exit from the menu without using this recall feature is obtained by clicking the mouse left key on the icon at the top right.

• If the selected destination trace is already present on the screen, it will be

pushed out by the recalled trace.

When a trace is recalled, Mx appears in the destination trace parameters.

• In this menu, the « Qwerty » keyboard is ineffective.

∗ In the Source menu is a file called « Configuration ». It contains the

equipment configuration parameters when this menu is opened.

∗ A save file name is proposed above the « Qwerty » keyboard. It is used

for modifying it (left mouse key).

The ß key deletes the displayed letter preceding the cursor in this zone.

∗ When the source file name has been entered, the à key is used for

recording the configuration by transferring it into the destination menu and closing the menu (save file: extension .CFG).

Exit from the menu without saving is obtained by clicking the icon at the top right of the window, with the left mouse key.

• The file name is limited to a maximum of 8 characters + its extension. As

soon as the mouse pointer passes over a source file (without a click) it is accompanied by its recording date, recording time and size.

• If the name already exists or is incompatible, an error message will appear.

Recall

when selected, opens the « File copy » menu.

∗ In this pull-down "Source" menu is a list of files (.CFG) recorded using the

"Configuration « Configuration à Save » menu. The file name, selected for recalling, appears in gray. Selection is by the left mouse key. The scrollbar on the right is used for moving through the list.

∗ With the source file selected, the à key is used for recalling the item. ∗ Exit from the menu without recalling is obtained by clicking with the left

mouse key at the top right of the window.

G • In this menu, the « Qwerty » keyboard is ineffective.

• The default config file is used for restoring the works configuration.

III - 40 Two-channel digital oscilloscope

Oscilloscope Mode - The « Utilities » Menu

SINUS.TRC 01/12/02 8.49

Oscilloscope Mode (cont'd)

The « UTIL » Menu

CONFIG.CFG 01/12/02 8.55 FONC.FCT 01/12/02 9.00

Two-channel digital oscilloscope III - 41

01/Dec./02

01/Dec./03

Oscilloscope Mode (cont'd)

Definition

Oscilloscope Mode - The « Utilities » Menu

File

when selected, open the « File manager » menu. It contains all the files

• recorded since the beginning of equipment use

• created since the last startup. These files will definitely been saved

when switching off (see key shown opposite).

Caution : If a power cut occurs when configuration saving, the files

contained in the file manager will be lost.

The (.CFG) configuration save files

(.TRC) trace save files (.FCT) function save files (.PCL, .EPS, .BMP, .GIF, .PRN) print save files

are accompanied by their date and time of recording and their size. The selected file appears in gray. The left mouse key selects the file and

the scrollbar on the right is used for moving through the list.

File typeGselects the desired file type by the scrollbar:

. CFG .TRC .FCT .PRN .PCL .EPS .BMP .GIF

Selection uses the mouse left key.

« *.* » used for selecting all the file types.

The storage capacity of the file manager is 1 Mbytes.

I/O port config.

Stop bits selects the number of stop bits (1 or 2 stop bits).

Protocol

Open leads to the restoration of the selected file by the “File Copy”

Erase deletes the selected file Export transmits the file over the active communication interface

(RS232/CENTRONICS)

Exit from this menu is by clicking with the mouse left key on the icon at the top right of the window.

when selected, opens the « RS232 » menu. This menu is used for configuring the remote programming interface. This interface uses the SUBD 25-pin female connector located on the

back of the unit.

Speed selects the transmission speed : from 300 to 115200 Bauds.

Format selects the word length: 7 or 8 bits.

Parity selects the type of parity: even, odd or no parity (none).

selects the serial link management mode. Hard Hardware: the protocol is by the RTS and CTS lines of the

RS232 link.

Soft Software: use of the Xon and Xoff characters to time the

transmission and reception of messages (reduced "3-wire" link).

None No protocol check.

• The « ••» symbol indicates the selected option.

• An option can be modified using the left mouse key.

III - 42 Two-channel digital oscilloscope

Oscilloscope Mode - The « Utilities » Menu

Oscilloscope Mode (cont'd)

Hardcopy

Option

Port

when selected, opens the « Hardcopy » menu. This menu is used for selecting the print format or the printer type, as well as

the communication port that will be used for making hardcopies. The printer type or selected format will appear in gray. Selection uses the left

mouse key. The scrollbar on the right is used for moving through the list of types or the printer languages.

used for choosing color or black/white printing. used for selecting the interface to be used for print data transfer: RS232C,

CENTRONICS or to file.

• If the RS232C interface is selected for making a hardcopy, the

parameters used (speed, format, parity, stop bit, protocol) will be configured in the "I/O Port Config" menu. Check that the configuration is suited to that of the peripheral connected to the instrument.

• The "File" option is a way of recording the hardcopy in a file. Pressing

the key shown opposite opens the "File copy" menu (see “Trace menu à

Save”). After entering the file name, the à key starts the print job. Reconfigure then the "Hardcopy" menu according to the type of

connected printer. The transfer of this file to a printer will use the Util à

File menu and the "Export" option.

• The « PP» symbol indicates the selected option.

• An option can be modified using the mouse left key.

Selection validation by « OK ». Exit from menu without modification by «Cancel ».

Configuration when selected, opens the « Configuration » menu.

This menu is used for configuring the equipment.

Date/time

Language selects the language in which the menus are written.

Screen saver

updates the date (day, month, year) and the time (hour, minute, second). Selection is by the left mouse key using the scrollbars located either side of

the parameters to be set.

The clock starts when the menu is closed.

5 options are possible: French,

English, German, Italian, Spanish.

used for setting the screen to standby after a defined period of time to minimize the consumption of the equipment and screen aging.

4 options are possible: 15 min,

30 min, 1 h, no standby mode.

The screen is reactivated by pressing any unused key on the front panel.

Two-channel digital oscilloscope III - 43

Oscilloscope Mode - The « Utilities » Menu

Oscilloscope Mode (cont'd)

Standby used for setting the equipment to standby after a defined period of use

so as to limit the consumption of the unit. In this case, the equipment configuration is saved before cutoff. 4 options are possible: 30 min,

1 h, 4 h, 12 h.

The equipment is reactivated using the key shown opposite or using a front panel key not taken into consideration.

G • The « •• » symbol indicates the selected option.

• The option can be modified using the left mouse key.

Selection validation by « OK ». Exit from menu without modification by « Cancel ».

System used for sending the user information about the life of the equipment

starting from commissioning.

Startup sequences

Use duration

Last calibration date indicates the date of the last equipment calibration.

Next calibration date

« Advanced » Mode

indicates the number of equipment starts. indicates the total utilization time in hours.

indicates the date of the next equipment calibration. Period equipment calibration is necessary to guarantee all the announced specifications.

For any checks of the equipment, see §. Maintenance, Metrological

checking.

Exit from this menu is by clicking on the icon at the top right with the left mouse key.

When activated, the« Advanced » mode gives access to all the equipment functions.

Conversely, when this mode is not active, the advanced equipment functions no longer appear in the menus.

Menus present in « Advanced » mode only:

- math1, math2, math3, math4 à accessible through the « Vert » menu

- averaging à accessible through the « Horiz » menu

- XY à accessible through the « Display » menu

- Unattached cursors à accessible through the « Measurement » menu

• The « üü » symbol indicates that the "Advanced" mode is active.

• Modification uses the mouse left key.

• By default, the "Advanced" mode is not active.

• In the "Non-Advanced" mode, the equipment configuration is not

saved on stoppage, using the key shown opposite.

III - 44 Two-channel digital oscilloscope

Oscilloscope Mode - The « Help » Menu

MTX3352-C, V1.01/A01

Oscilloscope Mode (cont'd)

The « ? » Menu

Definition

Help

About

when selected, opens the « Help » menu. This menu is used for activating on-line help using the equipment keys,

in the same way as the key shown opposite. The ß and à keys are used for scrolling through the description of the

keys on the front panel. The key name is used above the explanation. Exit from the menu is obtained by clicking with the left mouse key on the

icon at the top right of the window.

when selected, opens an information file. This file refers to the equipment software version and gives its date of

creation. Exit from the menu is by OK .

Two-channel digital oscilloscope III - 45

« Harmonics » Mode

Display

« Harmonics » Mode - Display

Presentation

Display

Harmonic analysis displays the fundamental and the 31 harmonics In this mode, the time base is adaptative, and is not manually adjustable.

This analysis is reserved for signals whose fundamental frequency is included between 40 Hz and 5 kHz.

All the conventional adjustments of the oscilloscope (except for the time base) remain active in this mode (Sensitivity/Coupling, Vertical scale).

Only the channels (and not the functions) can be the subject of harmonic analysis.

The harmonic analyses of the two signals can be displayed simultaneously.

Signal

IV - 46 Two-channel digital oscilloscope

« Harmonics » Mode - Display

Direct access

adjustments

area

Trace

Display of

Selection of

harmonic

Display:

« Harmonics » Mode (cont’d)

Composition Harmonic mode display is divided into 4 functional zones:

4. Menu base

1. Display zone

to current

information

display

1. Display zone

2. Control

fundamental or

3. Status zone

information about

selected

fundamental or

harmonic

displays the result of harmonic analysis of a single trace (ch1 or ch2) or the 2 traces simultaneously (ch1 and ch2).

Harmonic analysis of the ch1 trace is shown in a darker display, and that of the ch2 trace in lighter display (or same color as the trace).

The display appears as a bar chart, whose vertical axis is graduated as a percentage of the fundamental amplitude (from 0% to 100% every 25%).

The horizontal axis represents the harmonics, i.e.:

• the fundamental (F) and the first 16 harmonics

• the even harmonics from 2 to 30

• the odd harmonics (from 3 to 31) and the fundamental (F)

This breakdown of the harmonics is used for selecting, with the mouse left key, the fundamental (F) or one of the harmonics, (@ E.g.: Ref.

Harmonic 5) for making automatic measurements of the selected element.

• The « PP» symbol indicates the selected harmonic.

• See the "Display" menu for the selection of the harmonics.

2. Control zone

• of trace parameters in trace color:

validity, coupling, bandwidth limit, sensitivity

• of Zoom mode

• When the mouse is dragged over the parameters of a channel, the

right button is used for directly opening the associated menus

« Sensitivity/Coupling » and « Vertical scale ».

• The left key of the mouse is used for channel validation.

• The « PP» symbol indicates whether the channel is selected.

Two-channel digital oscilloscope IV - 47

« Harmonics » Mode (cont’d)

« Fundamental Ref. »

Information display about

traces

Information display about

harmonic

« Harmonics » Mode - Display

3. Status zone

The « SIGNAL » zone

The status zone returns the automatic measurements made on the signals and the selected harmonic.

Signal

fundamental or selected

indicates:

- the active channel(s): ch1 and/or ch2 (- - -) when the channel is not active

- the root mean square (RMS) of the signal in V

The

or « Harmonic » zone

4. Menu toolbar

- the harmonic distortion factor (THD) in %

indicates, for the fundamental or the selected harmonic, (@ E.g.: Ref.

Harmonic 3) :

- its value as a % of fundamental

- its phase in ° with respect to the fundamental

- its frequency in Hz

- its rms. voltage in V

The same menu toolbar is used as in "Oscilloscope" mode; some menus are adapted to the "Harmonic Analysis" mode and the others are not active.

IV - 48 Two-channel digital oscilloscope

Harmonics Mode - The « Vertical » Menu

Harmonics Mode (cont'd)

The « Vert » Menu

Definition

Display

Two-channel digital oscilloscope IV - 49

when selected, opens the "Trace display" menu used for validating or invalidating the traces.

Validation of selections by « OK ». Exit from menu without modification by « Cancel ».

• The « PP» symbol in front of a trace indicates its validation.

• Harmonic analysis of the ch1 signal is represented in a darker display,

and that of ch2 in a lighter display (or trace colour).

• In the "Harmonics" mode, only the channels (and not the functions) are the subject of harmonic analysis.

• Traces 3 or 4 cannot be selected.

Harmonics Mode (cont'd)

Harmonics Mode - The « Vertical » Menu

ch1 ch2

Sensitivity/Coupling modifies the parameters of the selected channel.

Channel Sensitivity

Coupling

Bandwidth limitGBandwidth limit of the channel and its trigger circuit at 20 MHz, to

used for modifying independently the ch1 and ch2 channels parameters and modifying the selected trace vertical scale.

modifies sensitivity of channel by scrollbar with left mouse key: from 2.5 mV to 100 V/div.

The sensitivity is given in the channel parameter display zone. It takes into

consideration the parameters of the "Vertical scale" menu.

Modification of AC - DC - GND coupling GND coupling: equipment connects the selected channel input to the

0 V reference level.

The « ¤ » symbol indicates the selected coupling. It is entered into the modified channel parameter display zone.

moderate the display noise and false triggering.

The « PP » symbol indicates that the "Bandwidth limit" mode is active and "bwl" appears in the modified channel parameters.

Validation of selections by « OK ». Exit from menu without modification by « Cancel ».

This menu can also be called by clicking with the right mouse key in the selected channel parameter display zone (ch1 or ch2).

Vertical scale defines the vertical scale of the selected channel from the current settings.

Coefficient Assignment of a multiplication factor to the selected channel sensitivity.

Modification is by the mouse using the table of usable numbers after selecting the "Coefficient" zone.

The ß key is used for deleting the value preceding the cursor in this zone. Predefined values (x1, x10, x100, x1000), corresponding to standard

probe coefficients and can be assigned directly.

G The sensitivity value indicated in the channel parameter display will be

modified according to this coefficient.

Measure Unit

Modification of the selected channel vertical scale unit. This modification is made using the mouse and the table of usable

characters, after selecting the "Measure Unit" zone. The ß key is used for deleting the value preceding the cursor in this zone.

The vertical scale unit will be entered into the modified channel parameter

display.

VI - 50 Two-channel digital oscilloscope

Harmonics Mode - The « Vertical » Menu

Harmonics Mode (cont'd)

Init re-initializes the multiplication coefficient at 1.0 and returning a measure

unit in Volts.

Validation of selections by « OK ». Exit fr om menu without modification by « Cancel ».

This menu can also be opened by clicking with the right mouse key in the selected channel parameter display (ch1 or ch2).

Two-channel digital oscilloscope IV - 51

Harmonics Mode (cont'd)

The « HORIZ » Menu

Definition

Harmonics Mode - The « Horizontal » menu

No averaging Average rate: 2 Average rate: 4 Average rate: 16 Average rate: 64

These menus are used for selecting an average rate to calculate an average according to the coefficient selected on the displayed samples.

This selected coefficient attenuates any random noise observed in a signal.

The selectable average rates are:

no averaging,

average rate: 2, average rate: 4, average rate: 16, average rate: 64.

Calculation is to the following formula:

Pixel N = Sample * 1/Average rate + Pixel N-1 (1-1/ Average rate)

with:

• Sample: value of new sample acquired at abscissa t

• Pixel N : ordinate of abscissa pixel t on screen at

instant N

• Pixel N-1 : ordinate of abscissa pixel t on screen at

instant N-1

The « PP» symbol indicates the selected average rate.

IV - 52 Two-channel digital oscilloscope

Harmonics Mode - The « Display » Menu - The « Memory » Menu

Harmonics Mode (cont'd)

The « DISPLAY » Menu

Definition These menus are used for displaying the harmonic composition of the

selected one or 2 signals in 3 groups.

Fund ààHarmonic 16

Even harmonics Odd harmonics

The

« MEMORY » Menu

displays fundamental and first 15 harmonics. displays even harmonics from 2 to 30. displays fundamental and odd harmonics from 3 to 31.

The chosen selection appears under the composition display.

• The « PP» symbol under fundamental F or one of the 31 harmonics

indicates the one selected.

• The selection is preserved during a change of display.

See description in "Oscilloscope" mode.

In the "Harmonics" mode, this menu is limited to saving and recalling the

instrument configuration.

Two-channel digital oscilloscope IV - 53

Harmonics Mode (cont'd)

The « Util » Menu

See description in « Oscilloscope » mode.

The « ? » Menu

See description in « Oscilloscope » mode.

Harmonics Mode - The "Utilities" Menu - The "Help" Menu

IV - 54 Two-channel digital oscilloscope

Functional Description

If one of those codes (or the addition of

Functional Description

Preparation for use

Instructions before

startup

Before initial startup:

• Connect the mouse to the 9-pin SUBD connector at the back of the

unit.

• Check the power supply cord which will be connected to the back of

the unit and to the network connector with a ground link is in good condition.

• When on, the LED shown opposite verifies that the mains voltage is

applied to the oscilloscope.

Error messages

AUTOSET_MICRO 0001 AUTOSET_FLASH 0002 AUTOSET_RAM 0004 AUTOSET_FPGA 0008 AUTOSET_SSRAM 0010 AUTOSET_SCALING1 0020 AUTOSET_SCALING2 0040 AUTOSET_SCALING3 0080

several codes) is present when getting started à a default has been detected.

In this case, contact your closest distributor (See §. Maintenance).

Mains voltage The oscilloscope power supply is designed for:

• a network capable of varying from 90 VAC to 264 VAC (use nominal

range 100 VAC and 240 VAC)

• a frequency included between 47 Hz and 63 Hz.

Startup

LCD contrast

LCD brightness

Fuse The unit is protected by a fuse:

• Fuse rating: T, 2,5 A, 250 V, 5 x 20 mm

This protection fuse must only be replaced by an identical model. Replacement may only be performed by qualified personnel .

Contact your closest distributor.

The pushbutton starts up the oscilloscope (the LED becomes green after loading).

A long press (> 3 seconds) switches the equipment to standby (the LED becomes red).

When the unit is powered up, the last memorized configuration is restored.

At initial startup, the default configuration parameters are applied.

This key is used for adjusting the LCD contrast. Adjustment is by the thumbwheel as long as the LED associated with is on.

The « TOGGLE » key on the thumbwheel is used for switching from LCD contrast adjustment to brightness adjustment (and vice versa).

Two-channel digital oscilloscope V - 55

Functional Description (cont'd)

∗

Applications

Functional Description

Calibration signal

display

• Connect the calibrator output (2.5 V, 1 kHz) of the connection zone to the

CH1 input using the 1: 10 ratio measurement probe (for instance).

• Using the key shown opposite, select the « Oscilloscope » mode. ∗ Confirm the signal: Vert Menu à Display: Trace 1

Adjust the ch1 sensitivity: Vert Menu à ch1à Sensitivity/Coupling:

50 mV/div. (1:10 probe)

∗ Adjust the coupling: Vert Menu à ch1à Sensitivity/Coupling: AC ∗ Adjust the sweep speed (time base window): 0,2 ms/div. ∗ Adjust the trigger source: Trig. Menu à Parameter à Source: ch1 ∗ Adjust the trigger mode: Trig. Menu à Automatic mode: automatic ∗ Using the key shown opposite, start acquisitions (RUN mode)

If necessary:

∗ Modify the trigger level by the left mouse key by dragging the symbol

T (Trigger) over the screen. The trigger level value is displayed at the bottom right of the screen.

∗ Modify the vertical framing of the curve by moving the symbol 1 on the

left of the screen using the left mouse key.

The Autoset button is used for automatically checking these adjustments.

Probe compensation Adjust the audio frequency compensation of the probe so that the signal

plateau is horizontal (see figure below).

Over-compensated probe Compensated probe Under-compensated probe

Refer to the manual attached to the probe when making compensation.

V - 56 Two-channel digital oscilloscope

Functional Description

Functional Description (cont'd)

Automatic

measurements

• Connect the calibrator output (2.5 V, 1 kHz) of the connection zone to

the CH1 input using a ratio 1 : 10 measurement probe.

• For probe adjustments, see the §. Calibration signal display.

• Opt for: 50 mV/div. vertical range

time base coefficient 0.5 ms/div. vertical scale coefficient 10 ch1 DC coupling

• Display the channel 1 signal automatic measurements table using the

menu: Measurement à Automatic measurements (see §.Measurement) or the key shown opposite.

The table of all the measurements made on the trace is displayed.

Note

The « PP » symbol indicates the 2 measurements that will be displayed on the trace once the table has been closed.

The deletion of automatic measurements beneath the trace is obtained by deleting the last 2 selected measurements.

The validation of the "Reference memory difference" option is used for calculating, for the same measurements, the difference between a selected trace and a memorized reference trace (see §. Memory).

The measurement precision is optimum if 2 complete signal periods are displayed.

The activation of automatic measurements reveals 2 cursors on the trace at the beginning and end of a period if at least one period can be viewed on the screen.

Two-channel digital oscilloscope V - 57

Functional Description (cont'd)

Functional Description

Measurements by

cursors

Note

Cursor offset

measurements

Automatic phase

measurement

• Select measurements by cursors using the menu: Measurement à

Manual measurements (dt, dv) (see §. Measurement).

∗ Two measurement cursors (1 and 2) are displayed as soon as the

menu has been activated.

∗ The 2 measurements made, entered under the trace display, are dt

(interval between 2 cursors depending on time base) and dv (voltage between 2 cursors depending on vertical sensitivity).

@ E.g.: dt(1): 2,15 ms, dv(1) = 250 mV

• The two measurement cursors (1 and 2) can be moved directly over the

screen using the mouse left key. In the same way, they can also be moved horizontally by the mouse by selecting 1 (cursor 1) or 2 (cursor 2) in the status zone bargraph.

• If the free cursors option is not activated (see §. Measurement à Free cursors), the cursors will remain linked with the trace during movements.

• If the free cursors option is active, the cursors can be moved anywhere

over the screen.

• Initially, it will be necessary to have 2 offset signals on the 2 channels.

• Select the reference trace with respect to the one on which phase

measurements are to be made from the menu: Measurement à Reference à Trace 1 or Trace 2 (see §. Reference).

Note • The 3 cursors are fixed and cannot be moved.

Manual phase

measurement

@ E.g.: Reference Measurement à Trace 1.

• Select automatic phase measurement from the menu: Measurement à

Phase measurements (see §. Phase measurement).

@ E.g.: Phase measurement à Trace 2 Phase.

∗ The 2 cursors (+) for automatic measurements are displayed on

reference trace. A « ϕ » cursor is displayed on the trace on which the phase measurements are made.

∗ The phase measurement (in °) is indicated under the curve display.

@ E.g.: Ph (2/1) = 180.0°

• If the measurement cannot be made, « -.- - » appears.

• Select manual phase measurement from the menu: Measurement à

Manual phase measurement (see §. Measurement).

∗ The 2 cursors (1 and 2) for manual measurements are displayed on

a reference trace. A « ϕ », cursor with respect to which the phase measurement is made, will be displayed.

∗ The phase measurement (in °) is indicated under the display of the

curve(s).

@ E.g.: Phase = 150.0°

V - 58 Two-channel digital oscilloscope

Functional Description

Functional Description (cont'd)

Note • The 3 measurement cursors are present if there is at least one trace on

the screen.

• The 3 measurement cursors can be moved directly over the screen

using the left mouse key. They can also be moved by the mouse, by selecting 1 (cursor 1) or 2 (cursor 2) in the status zone bargraph.

• If the "free cursors" option is not activated (see §. Free cursors), then the

cursors (1 and 2) will remain linked with the trace during the movements.

If the option is active, these cursors can be moved freely over the screen.

In all cases, the ϕ symbol can be moved freely.

Video signal display This example illustrates the TV synchronization functions.

Examination of TV signal

• Inject into channel CH1, a composite TV signal having the following

characteristics: - positive modulation

- vertical grey scale stripes

Note

• Select from the Trigger Parameters menu (see §. Trigger) TV-line

coupling to trigger on a line sync pulse.

• Select the automatic trigger mode using the menu Trig à Automatic

Mode (see §. Triggering).

• Start acquisition by selecting the RUN option from the time base

menu.

• This menu is displayed by clicking in the zone indicating the time

base value with the right mouse button, or by pressing the key shown opposite.

• The acquisition status (RUN/STOP) is indicated on the right, under

the display of the trace, in the trigger status display zone.

Optimize the time base speed to observe several complete TV lines (@ E.g.: 20 µs/div.).

@ Example of a video signal

Two-channel digital oscilloscope V - 59

Functional Description (cont'd)

Examination of a TV frame

• In the Trigger Parameters menu (see §: Triggering), select TV-frame coupling that permits pulse triggering on a frame sync.

• Modify the time base speed to 1 ms/div.

@ Example of TV frame

The synchronization train is clearly visible at the beginning of the screen.

Functional Description

Automatic

measurement in

Harmonic Analysis

mode

Note - Only the channels (and not the functions) can be the subject of harmonic

Note

Initially, there must be one or two traces on channels ch1 and/or ch2.

analysis.

- In this mode, the time base is not adjustable.

• Adjust correctly the ch1 and/or ch2 channel traces in the "Oscilloscope"

mode.

• Using the key shown opposite, select the "Harmonic Analysis" mode.

The ch1 channel trace is shown in a darker display, and the ch2 trace in a lighter display.

• Select using the "Display" menu (see §. Display) the desired harmonic

breakdown.

- fundamental (F) and the first 15 harmonics

- even harmonics (from 2 to 30)

- odd harmonics (from 3 to 31) (+ fundamental)

Note

V - 60 Two-channel digital oscilloscope

The chosen selection appears under the breakdown display.

• The « SIGNAL » table under the breakdown indicates:

- the active channel(s) (ch1 and/or ch2)

- the rms. voltage of the signal in V

- the harmonic distortion factor (in %) of the signal

• The « PP» symbol on the fundamental (F) or on one of the harmonics

can be modified using the mouse left button to make measurements on the selected harmonic.

Functional Description

Functional Description (cont'd)

• The « Ref.: Harmonic X » » feeds into the selected harmonic:

- its value as a % of the fundamental

- its phase in ° with respect to the fundamental

- its frequency in Hz

- its RMS voltage in V

@ Example harmonic breakdown

On ch1 : the signal of the output calibrator (2.5 V, 1 kHz) (see §. Calibration signal display)

On ch2 : triangular signal of 1 kHz and 2.5 V amplitude

Oscilloscope mode

Harmonics mode

Display « Odd Harmonics » selected

« Harmonics 3 » selected

Two-channel digital oscilloscope V - 61

Functional Description (cont'd)

Functional Description

Display of slow

events

« ROLL Mode»

The purpose of this example is the analysis of slow events for time bases ranging from 200 ms to 200 s.

The samples are displayed constantly without waiting for the Trigger ("Roll" mode).

@ Examination of a slow event

• Select the « Oscilloscope » mode.

• Inject to the CH1 input a sinusoidal signal at 1 Hz and 1 Vrms.

• Adjust the time base to 500 ms.

• Select Trace 1 : Menu : Vert → Display → Trace1.

• Select the sensitivity and coupling for ch1 : Menu : Vert → ch1 →

Sensitivity / Coupling:

- Channel Sensitivity : 500 mV

- Coupling : DC

• Select the trigger parameters : Menu : Trig → Parameters :

- Trigger source : CH1

- Trigger edge : +

• Select the « Single Shot » trigger mode : Menu : Trig → Single mode

• Using the mouse, move the trigger level symbol (Trigger) at (or down)

with respect to the display area.

If the trigger level is reached, the oscilloscope will stop data acquisition once it has filled the acquisition memory (STOP mode).

• Start acquisition using the RUN/HOLD key (RUN mode).

Examination of a signal

The signal is constantly analysed (RUN mode).

V - 62 Two-channel digital oscilloscope

Technical specifications

Only the values assigned with a tolerance or limits are guaranteed

Technical specifications

values (after half an hour warming-up). Values without a tolerance are given for information only.

Vertical deflection

Characteristics Specifications Comments

Number of channels 2 channels: CH1 & CH2 Type of inputs Class 1, common grounds Bandwidth at –3dB

Vertical offset dynamic Input coupling AC: 10 Hz to 60 MHz (MTX 3252; MTX 3252-C)

BWL bandwidth limit at 20 MHz

Rise time MTX 3252; MTX 3252-C:

Cross-talk between channels

ESD tolerance ± 2 kV Response to rectangular signals 1 kHz and 1 MHz Vertical rating accuracy

Vertical resolution DC vertical measurement

accuracy

MTX 3252; MTX 3252-C: > 60 MHz on all vertical ratings from 2.5 mV to 5 V/div. ≥ 20 MHz on 10 V/div. ratings to 100 V/div.

MTX 3352; MTX 3352-C: > 100 MHz on all vertical ratings from 2.5 mV to 5 V/div.

≥ 20 MHz on ratings from 10 V/div. to 100 V/div.

± 10 divisions on all ratings

- 100 MHz (MTX 3352; MTX 3352-C)

DC: 0 to 60 MHz (MTX 3252; MTX 3252-C)

- 100 MHz (MTX 3352; MTX 3352-C) GND: reference

< 6 ns on all vertical ratings 2.5 mV to 100 V/div.

MTX 3352; MTX 3352-C:

< 3 ns on all vertical ratings 2.5 mV to 100 V/div. DC at 20 MHz ≥ 35 dB

MTX 3252; MTX 3252-C: 20 MHz to 60 MHz ≥ 25 dB

MTX 3352; MTX 3352-C: 20 MHz to 100 MHz ≥ 25 dB

Overrun < 3 % Aberration < 3 % ± 2 %

± 0.4 % of full scale ± [2 % (reading – offset) +

precision of vertical offset + (0.05 div.) x (V/div.)]

Measured on 50 Ohm load with 6 div. amplitude signal

Same sensitivity on both channels

Positive or negative overshoot Sequence of vertical

ratings 1 - 2 - 5 Variation in steps (no variable continuous coefficient) Vertical resolution 22 points per div.

Precision of vertical offset Probes Take into consideration

Vertical ZOOM function on acquired or backed up curve Maximum input voltage 420 Vpk (DC + AC peak at 1 kHz)

Two-channel digital oscilloscope VI - 63

± [0.01 x (offset value) + 4 mV + (0.1 div.) x (V/div.)]

attenuation factor of probe in display

Zoom factors

without probes 560 Vpk (DC + AC peak at 1 kHz) with probe 1/10 ref. HX0003

NB: the probe factor must be

brought in manually.

There is no automatic detection of

probe presence.

Technical specifications (cont'd)

Vertical channels (cont'd)

Characteristics Specifications Comments

Technical specifications

Electrical safety 150 V, CAT II without probe

400 V, CAT II with probes HX0003

Input impedance 1 MΩ ± 1 % approx. 13 pF Display modes ch1, ch2

(300 V, CAT I; 300 V, CAT II)

Horizontal deflection (time base)

Characteristics Specifications Comments

Time base ratings 37 ratings, from 1 ns to 200 s/div. Sequence 1 - 2 - 5 Time base precision ± 0,5 % Sampling frequency

Time measurement precision Horizontal ZOOM The available horizontal

XY Mode

50 MS/s on 2 channels 100 MS/s on one channel precision ± 200 ppm

± [(0,04 div.) x (time/div.) + 0,005 x (reading) + 1 ns]

ZOOM factors range from x 1 to x 200 depending on sequence 1-2-5 (in ZOOM mode, we have the same time base criterion sequence as in normal mode).

Bandwidth in X and Y identical

N.B.: The oscilloscope has a

recording memory capacity of

50 kpts per channel.

Horizontal screen resolution is

250 points for 10 divisions.

Bandwidth in X

and Y

Phase error

Ø 60 MHz (MTX 3252; MTX 3252-C) Ø 100 MHz (MTX 3352; MTX 3352-C)

< 3° In XY mode at each

instant t: The smallest time increment between two successive XY points is given by the real acquisition frequency of the oscilloscope. XY mode representation therefore depends on the basic selected time rating.

VI - 64 Two-channel digital oscilloscope

Technical specifications

Technical specifications (cont'd)

Trigger circuit

Characteristics Specifications Comments

Trigger sources CH1, CH2, External, Mains Trigger mode Automatic

Triggered

Single shot Trigger coupling without bandwidth limit

Trigger slope Falling edge or Trigger sensitivity

Sources CH1 and CH2

AC: BP 10 Hz to 60 MHz (MTX 3252; MTX 3252-C)

BP 10 Hz to 100 MHz (MTX 3352; MTX 3352-C)

DC: BP 0 to 60 MHz (MTX 3252; MTX 3252-C)

BP 0 to 100 MHz (MTX 3352; MTX 3352-C) HFreject: BP 0 to 10 kHz LFreject: BP 10 kHz to 60 MHz (MTX 3252; MTX 3252-C)

BP 10 kHz to 100 MHz (MTX 3352; MTX 3352-C) TV-frame TV-line Note: With band activated,

Rising edge 0,5 div. at 1 kHz

BW is limited to 20 MHz.

External source Trigger level Variation range ± 8 div.

50 mV

Acquisition chain

Characteristics Specifications Comments

ADC Resolution Maximum sampling frequency Sampling modes Real time

Equivalent time ETS Transient capture

Minimum detectable Glitch width (min/max acquisition) Acquisition memory dept 50 Kbytes fixed PRETRIG Function from 1 Kbyte to 50 Kbytes CH1 and CH2 channel saving memories Storage formats Trace (.TRC) Save trace and acquisition

8 bits (20 LSB/div.) 50 MS/s

100 MS/s max. on one channel 50 MS/s max. on 2 channels Accuracy ± 200 ppm

50 GS/s max.

≥ 20 ns

Saving of up to 4 files each containing 50 kpts max.

Configuration (.CFG) Save complete equipment Screen copy (.EPS) Standard image format

(.PRN)

File (.FCT) Saving of a function

1 converter per channel

Single non-repetitive signals

Repetitive signals Whatever time base used, shortterm events (Glitch, ≥ 20 ns) are displayed.

Files assigned to names

parameters configuration

Two-channel digital oscilloscope VI - 65

Technical specifications

Technical specifications (cont'd)

Display

Characteristics Specifications Comments

Display screen LCD 5.7 STN Monochrome (MTX 3252; MTX 3352)

LCD 5.7 STN Color (MTX 3252-C; MTX 3352-C) CCFL back-lit

Contrast Continuous adjustment Resolution 1/4 VGA:

i.e.: 320 pixels horizontal x 240 pixels vertical

Screen saver Time selectable in

Menu Util à Configuration

LCD zone reserved for traces 10 div. (H) x 8 div. (V)

i.e. 250 x 176

Displayed mode window

Normal

Complete memory

25 pts/div. (H) x 22 pts/div. (V)

50 Kbytes Horizontal ZOOM Display modes

Vector

Envelope

Averaging

Graticule Complete Axes Borders Indications on screen

Trigger

Traces

up to 250 pts from 50 kpts of complete memory Acquired points, interpolated points, variable persistence, averaging

The acquired points are attached by a segment.

Min. and max. on each horizontal screen position are displayed.

Factors ranging from 2, 4,16, 64

Trigger level position (with overshoot indicator) Trigger point position on bargraph (with overshoot indicator)

Trace identifiers Position, Sensitivity Ground reference Overshoot indicators top and bottom if traces off screen

case of max. ZOOM x 200

Miscellaneous

Calibration signal Form

Amplitude Frequency

VI - 66 Two-channel digital oscilloscope

rectangular

0 – 2.5 V ± 2 %

1 kHz ± 1 %

Technical specifications

Technical specifications (cont'd)

Communication interfaces

SUBD 9-pin male connector

SUBD 25-pin female connector

for RS232C/CENTRONICS

interfaces

RS232C link configuration

USB Port serial B (option) used for connecting oscilloscope to PC.

A SUBD9-pin male connector is available on the back for connecting a serial mouse.

The RS232C and CENTRONICS interfaces use the same SUBD 25-pin female connector on the back of the unit.

Selection of speed in Bauds 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200

Parity selection None, even, odd

Word length selection 8 bits or 7 bits

Stop bit number selection 1 or 2 stop bits

Protocol selection Hard (for RTS and CTS lines) Soft (for XON and XOFF characters) None (no protocol)

Location on rear of unit Connector rear panel type B Specification conforms to USB Rev. 10 Speed 1.5 Mbps, 12 Mbps

ETHERNET Interface (option) Location rear panel of unit

Type 10BASE-T (Twisted Pair) Connector RJ 45 8 points Standard IEEE 802.3

6-pin Mini-Din 6 connector

(option)

for connecting PS2 mouse. Location on rear of unit

Connector 6-pin Mini-Din

Remote program of oscilloscope by a PC

The oscilloscope can be programmed at a distance with a computer or PC using simple standardized commands and the RS232C interface (or the series B USB port as an option) for transferring data from or to the recording memory.

The programming instructions comply with the IEEE 488.2 standard, SCPI protocol.

Refer to the remote programming manual for the list of commands.

Two-channel digital oscilloscope VI - 67

General characteristics

EMC

•

Environment • Reference temperature 18°C to 28°C

• Operating temperature range 0°C to 40°C

• Storage temperature range -20°C to +70°C

• Use indoor

• Altitude < 2000 m

• Relative humidity < 80 % at up to 31°C

General characteristics

Mains power supply

Safety

• Network voltage Use nominal range 100 to 240 VAC

• Frequency from 47 to 63 Hz

• Consumption < 12 W at 230 VAC, 50 Hz

• Fuse 2,5 A / 250 V / delayed

• Removable power supply cord

As per IEC 61010-1 (2001) :

• Insulation class 1

• Pollution degree 2

• Power supply overvoltage category CAT II 240 V

• "Measurement” input overvoltage category CAT II 150 V or

CAT I 300 V

This equipment is designed to conform to current EMC standards and its compatibility has been tested as per NF Standard EN 61326-1, 07/97 + A1, 10/98 :

Immunity influence magnitude: 2 div. in presence of 3 V/m

electromagnetic field

Mechanical characteristics

Case

Packaging

VII - 68 Two-channel digital oscilloscope

Size Screen shutter open 300 (H) x 270 (l) x 195 (D) in mm

Screen shutter closed 170 (H) x 270 (l) x 195 (D) in mm

• Weight approximately 3.3 kg

• Materials ABS VO (self-extinguishing)

• Tightness IP 30

• Size 308 (l) x 338 (L) x 338 (D) in mm

Supply

•

Supply

Accessories

Supplied with

instrument

Supplied as an

option

• Operating manual and programming manual for CD ROM

• Mains power supply cord

• Safety probes (x 2)

• Serial mouse with SUBD 9-pin connector

• Mouse mat

• Takeoff Tee

1 x BNC male - 2 x BNC female (package of 3 u.) HA2004-Z

• BNC female - BNC female extender (package of 3 u.) HA2005

• Safety adapter

BNC male / 4 mm socket, CAT III, 500 V (package of 3 u.) HA2002

• Safety adapter BNC male / 4 mm plug, CAT III, 500 V (package of 3 u.) HA2003

• Safety adapter BNC male / 4 mm socket, CAT III, 500 V (package of 2 u.) HA2053

• Voltage probe 1:10 fixed, 150 MHz, CAT II / 400 V HX0003

• Voltage probe 1:10 fixed, 450 MHz, CAT II / 1000 V HX0005

• Voltage probe 1:100 fixed, 300 MHz, 5 kV Peak HX0006

Spares

Differential probe 30 MHz MX9003-Z

• BNC male / BNC male cord CAT III, 500 V, length 1 m AG1044

• BNC male / BNC male cord CAT III, 500 V, length 2 m AG1045

• RS232C – 9-pin male / 25-pin female adapter AS0204

• IEEE / IEEE cable, length 1 m AG0368

PC transfer software SX-METRO2

• Labwindows and Labview Drivers (VISA standard) available on the NATIONAL INSTRUMENTS site (www.natinst.com)

• Digital plotter (A3 / A4) CA 991

• Carrying bag AE0189

• Field kit HX0024

• 2.5 A, 250 V, T, 5 x 20 mm AT0090

Oscilloscope numérique à 2 voies VII - 69

Metrix MTX 3352, MTX 3252, MTX 3252-C, MTX 3352-C Operating Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual