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

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Test et Mesure CHAUVIN-ARNOUX

6, avenue du Pré de Challes

F - 74940 ANNECY-LE-VIEUX

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

GB - Maidenhead SL6 8BR

X03043A00 - Ed. 02 - 06/10

CA UK Ltd.

Waldeck House

Waldeck Road

General instructions

Contents

General instructions Chapter I

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

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

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

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

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

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

Preparation for use........................................................................10

ETHERNET network......................................................................11

Oscilloscope Mode Chapter III

Keys...............................................................................................13

Display...........................................................................................17

Menus

"Vert" Vertical menu..........................24

"TRIG" Trigger menu..........................36

"Horiz" Horizontal menu..........................45

"Display" Display menu..........................50

"Measure" Measurement menu..........................53

"Memory" menu..........................58

"Util" Utilities menu..........................61

"?" Help menu..........................66

« Oscilloscope Mode with SPO » Chapter IV

Keys...............................................................................................67

Display.......................................................................................... 67

Menus

"Vert" Vertical menu..........................71

"TRIG" Trigger menu..........................71

"Horiz" Horizontal menu..........................71

"Display" Display menu..........................72

"Measure" Measurement menu..........................74

"Memory" menu..........................75

"Util" Utilities menu..........................76

"?" Help menu..........................76

“Harmonic Analysis” Mode (option) Chapter V

Installation ....................................................................................77

Keys...............................................................................................77

Display...........................................................................................77

Menus

"Vert" Vertical menu..........................80

"Horiz" Horizontal menu..........................82

"Display" Display menu..........................83

"Memory", "Util" Utilities, "?" Help menus..........................84

I - 2 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

General Instructions

Recorder Mode (option) Chapter VI

Installation .....................................................................................85

Keys...............................................................................................85

Display...........................................................................................88

"Vert" Vertical menu..........................96

"TRIG" Trigger menu..........................97

"Horiz" Horizontal menu........................102

"Display" Display menu........................103

"Measure" Measurement menu........................105

"Memory" menu........................106

"Util" Utilities menu........................109

"?" Help menu........................111

Applications Chapter VII

Calibration signal display.............................................................112

Probe compensation....................................................................112

Automatic measurements............................................................113

Cursor measurements.................................................................114

Cursor offset measurements .......................................................114

Video signal visualisation ............................................................115

Examination of a TV specific line ................................................117

« SPO » applications...................................................................118

Automatic measurements in Harmonic Analysis mode...............121

Display of slow events.................................................................124

Measurements in « Recorder » mode.........................................124

ETHERNET network....................................................................126

WEB server .................................................................................128

Technical Specifications Chapter VIII

« Oscilloscope » mode..............................................................133

Vertical deflection...................................................................133

Horizontal deflection (time base) ...........................................134

Trigger circuit .........................................................................135

Acquisition chain ....................................................................136

Display....................................................................................137

Miscellaneous ........................................................................137

« Oscilloscope mode with SPO » ............................................138

« Harmonics Analysis » mode .................................................138

« Recorder » mode ....................................................................139

Error messages ...........................................................................139

Communication interfaces...........................................................140

Remote programming..................................................................140

General characteristics Chapter IX

Environment ................................................................................141

Mains power supply.....................................................................141

EMC.............................................................................................141

Mechanical characteristics

Casing ........................................................................................141

Packing........................................................................................141

Supply Chapter X

Accessories .................................................................................142

Index

Firmware update : You may use PC software provided on the CD-ROM and consult Internet site

www.chauvin-arnoux.com. The software update involves a rebootstrrapping of the filesystem : all

Two-channel digital oscilloscopes, 60 MHz or 100 MHz I - 3

the saved files are erased and lost.

General instructions

General Instructions

Introduction

Precautions and safety measures

definition of

measurement

categories

You have just acquired a two-channel digital oscilloscope with “SPO” analog persistence display, 60 MHz or 100 MHz, ETHERNET.

It can also features a « harmonic analyser » (option) mode and a « recorder » mode (option).

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. 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 % at up to 31°C.

•

It can be used for measurements on circuits at 300 V CAT II, relative to ground and can be supplied by a 240 V CAT II network.

CAT I : Measurement category I is for measurements performed on circuits not

directly connected to mains.

E.g.: protected electronic circuits CAT II : Measurement category II is for measurements performed on circuits

directly connected to the low voltage installation.

E.g.: power supply to domestic appliances and portable tools. CAT III : Measurement category III is for measurements performed in the building

installation

E.g.: machine or industrial apparatus power supply. CAT IV : Measurement category IV is for measurements performed at the source

of the low-voltage installation.

E.g.: energy inputs

before use

during

use

I - 4 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

• 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 V

• 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.

General Instructions

General Instructions (cont’d)

Symbols used

Guarantee

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

Earth

This equipment is guaranteed 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.

According to WEEE directive 2002/96/EC

Maintenance and metrological checking

Unpacking and repacking

Servicing

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

supply and the measurement circuits. 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.

•

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.

Two-channel digital oscilloscopes, 60 MHz or 100 MHz I - 5

Description of instrument

Smart

Harmonic

analyser

Description of instrument

Presentation

Persistence

Oscilloscope

mtx 3x52

Recorder

This instrument has the particularity of grouping together 3 units in 1 :

•

a Digital Oscilloscope incorporating the

FFT (Fast Fourier Transform) function and

SPO (Analog Persistence Display)

intended to analyze the signals appearing in the electronics and

electrotechnical fields

•

a Harmonic Analyser (option) mode for breaking down four signals simultaneously while representing their fundamental and their first 31 harmonics

•

a Recorder mode (option) 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 “Windows ®” like.

A large-size colour 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, ETHERNET and USB to RS232 interfaces as standard.

Overall view

II - 6 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Description of instrument

VERTICAL

HORIZONTAL

ACQUISITION

Description of instrument (cont’d)

Front panel (illustration)

SPO

TRIGGER

Measurement terminal block

CH1 signal input CH2 signal Input EXT input Calibrator output

Two-channel digital oscilloscopes, 60 MHz or 100 MHz II - 7

Description of instrument

Description of instrument (cont’d)

Rear panel

USB connector

USB to RS232

interface

ETHERNET RJ45

connector

SUBD 25- pin female

connector

for RS232/CENTRONICS

interfaces

6-pin MiniDin

connector

PS/2 mouse

Mains plug

II - 8 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Description of instrument

Description of instrument (cont’d)

Front panel

(

description)

1 startup / standby

1 mouse / 2 keys

button

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.



If a menu is open when the key is pressed, the backup is performed,

but no message is displayed.

connected to the back of the oscilloscope (PS/2 connector) 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.

1 rotary control

button

•

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.

•

Zooming in the display zone is possible using the mouse:

hold the left key down when defining the zone with the pointer (cannot

be activated in “SPO” analog persistence display

•

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 which has no secondary function.).

21 fleeting action

keys

Two-channel digital oscilloscopes, 60 MHz or 100 MHz II - 9

giving direct access to the more basic functions.

Description of instrument

Description of instrument (cont’d)

Preparation for use

Instructions before

startup

Error messages

Mains voltage

Fuse

Before initial startup:

•

Connect the mouse to the PS/2 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 grounded mains is in good condition.

•

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

to the oscilloscope.

Refer to §. Technical Specifications p. 139.

The oscilloscope power supply is designed for:

•

a mains voltage from 90 VAC to 264 VAC (use nominal range 100 VAC and 240 VAC)

•

a frequency included between 47 Hz and 63 Hz.

The unit is protected by a fuse:

•

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

This protection fuse must only be replaced by an identical model.

Startup

LCD contrast

LCD brightness

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.

Never disconnect the instrument from the network while the message



"System shutdown. Please wait before switch off power !" is displayed on the screen, otherwise the current file and all the files saved beforehand will be lost.

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

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

II - 10 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Description of instrument

Description of instrument (cont’d)

ETHERNET network

General principles

of the ETHERNET

network

Addressing

ETHERNET physical

addresses

IP addresses

ETHERNET and TCP/IP (Transmission Protocol/Internet Protocol) are used to communicate on a company's network.

Each piece of equipment under TCP/IP has a physical address (ETHERNET) and an Internet address (IP).

A physical or ETHERNET address, stored in ROM, identifies each item of equipment on the network. The physical address enables the equipment to determine the source of data "packet" transmission.

The physical address is a number coded over 6 bytes represented in hexadecimal form. Hardware manufacturers procure physical addresses and allocate them incrementally when the product is manufactured. The physical addresses cannot be modified.

An IP address is coded over 4 bytes, displayed in decimal format. ( Example: 132.147.250.10).

Each field may be coded between 0 and 255 and is separated by a decimal point.

Unlike the physical address, the IP address can be modified by the user.

You must ensure that the IP address is unique on your network. If an address is duplicated, network operation becomes random.

The IP address is made up of two parts:

•

the network identifier (Network ID) identifying a given physical network

•

the host identifier (Host ID) identifying a specific item of equipment on the

same network. There are 5 addressing classes. Only classes A, B and C are used to identify

the equipment. See below:

Class A

0XXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX Network ID Host ID

Class B

10XXXXXX XXXXXXXX XXXXXXXX XXXXXXXX

Network ID Host ID

Class C

010XXXXX XXXXXXXX XXXXXXXX XXXXXXXX

Network ID Host ID

Two-channel digital oscilloscopes, 60 MHz or 100 MHz II - 11

Description of instrument

Description of instrument (cont’d)

SUBNET mask and GATEWAY

DHCP Protocol

FTP protocol

If the result of the operation ' ET LOGIQUE' between IP address of the recipient of the message and the value of subnet mask is different from the address of the recipient of the message, this message is sent to the gateway which will be given the responsibility to forward it to destination.

The programming of the mask and the address of the gateway is possible on the instrument, in the Advanced mode.

This protocol is used to automatically assign an IP address to the instrument when it connects up to the network.

A DHCP (Dynamic Host Configuration protocol) server must be accessible on this network (contact your network administrator to make sure that this server is present).

FTP (File Transfer Protocol) is used in the oscilloscope for fast file transfers to or from a PC.

To use it, open the browser on the PC and, in the URL field, type the IP address of the instrument, preceded by "ftp:"



Example: ftp://192.168.3.1

The oscilloscope is an FTP server. See §. Applications p. 126, 132.

HTTP protocol

LPD protocol

With this protocol, the instrument can act as a WEB server and you can access the most frequent settings and view traces on your PC using your browser (EXPLORER, NETSCAPE, …)

To use it, open the browser on the PC and, in the URL field, type the IP address of the instrument, preceded by "http:"



Example: http://192.168.3.1

See §. Applications p. 128.

To be able to display the traces, you must install on your PC the Java Virtual Machine JVM SUN 1.4.1 (or higher). This JVM can be downloaded from the site http://java.sun.com

This protocol (Line Printer Daemon) is used by most of the printers connected to an ETHERNET network, but also by the printing server units which handle conversion between ETHERNET and CENTRONICS

( Example: Jet Admin) and UNIX and LINUX workstations. An LPD server can also be installed on a PC (available as an option with

WINDOWS 2000 or XP). In all cases, the instrument is an LPD client which has to be configured to

indicate to it the IP address of the LPD server (the workstation PC or directly the printer) and the logical name of the printer managed by the server.

See §. Applications p. 127.

II - 12 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - Keys

Selective«AUTOSET»

Oscilloscope Mode

Keys

4 «UTILITY» keys



Attention

Pressing this key will configure the instrument in the following modes: « oscilloscope », « harmonic analyser » (option), « recorder » (option).

used for access to the LCD contrast adjustment using the thumbwheel. The LED combined with the thumbwheel comes on  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.

In «SPO Oscilloscope » mode, this key has no action : when pressing this key the following message is displayed : « Not possible in this mode ».

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.



Attention

1 «AUTOSET» key

with

1 HELP key

The « » symbol is displayed in front of the display zone of the last selected element 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  Trace  Save » menu.

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

In «SPO Oscilloscope » mode, this key has no action : when pressing this key the following message is displayed : « Not possible in this mode ».

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 AC/DC/GND key. activating or deactivating help on the keys.

Whenever a keyboard key is pressed, on-line help will be displayed for the depressed key (except for the key ????). 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.

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 13

Oscilloscope Mode - Keys

Oscilloscope Mode (cont’d)

2 «ACQUISITION»

keys



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

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

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

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

RUN STOP key.

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

related to signals appearing at the oscilloscope (ch1, ch2, ch3, ch4 or mains).

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.

2 «TRIGGER» keys



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

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

• A long press forces the trigger (Force TRIG).

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.



Attention

III - 14 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

In «SPO Oscilloscope » mode, this key has no action : when pressing this key the following message is displayed : « Not possible in this mode ».

Oscilloscope Mode - Keys

Oscilloscope Mode (cont’d)

3 « MEASUREMENT »

keys

activates or deactivates the display of the window for the 19 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 »  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.

•

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.

2 «HORIZONTAL»

keys



adjusts the time base coefficient (T/div.) by thumbwheel or the horizontal position (H-Pos.) by the thumbwheel TOGGLE key.

The LED associated with the wheel lights up  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.

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 15

Oscilloscope Mode - Keys

Oscilloscope Mode (cont’d)

Definition :

5 «VERTICAL» keys



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

opposite key.

Before pressing one of the four keys:

The channel concerned is not displayed.

The channel concerned is displayed, but not selected.

The channel concerned is displayed and selected.

Press

After pressing one of the 4 keys:

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

Double pressing one of those keys devalidates (erases) the concerned signal.

In « SPO mode », the math functions are not authorized. In this case, the MATH {3 , 4} keys validate or devalidate the M {3 , 4} memory channels.

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.

Each press gives access, through the thumbweel, to the adjustment of the sensitivity (V/div.) of the last selected channel.

By pressing the TOGGLE, you switch from the sensitivity adjustment to the vertical position adjustment (V-Pos.).

When the LED of the thumbwheel lights on means that you may adjust with the thumbwheel.

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 : ground :

III - 16 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - Display

4. Menu bar

uency of appearance (red corresponds to

Oscilloscope Mode (cont’d)

Display

in oscilloscope

mode

in SPO Persistence

mode

See chapter IV, p. 67.

View serial bus Data in envelope mode. In this mode, the absence of accumulation of

successive acquisitions and multi-colour display does not show infrequent signals. All points displayed at the same colour and intensity.

Displays a warbled triangular signal The modulation amplitude in Envelope

mode may be seen on the screen. All points displayed at the same colour and intensity.

Composition

Displays serial bus Data.

In "Persistence SPO" display, successive acquisitions are accumulated and the multicoloured view visually represents the frequency with which points (traces) appear, infrequent signals in "blue", and the more frequent signals in "red".

In "Persistence SPO" view, a warbled triangular signal is displayed: the modulation amplitude can be viewed on the screen. The colour of traces varies according to their freq high appearance frequencies and blue to low).

The oscilloscope display is divided into 4 functional zones.

3. Display zone

zone

2. Control

Direct access to current adjustment

1. Status zone

Display and adjustment of current value

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 17

Oscilloscope Mode - Display

manual cursors

Movement to left of screen in

Oscilloscope Mode (cont’d)

1. Status zone

Bargraph

Cursor Measurements

acquisition memory

Three types of general information appear in this zone:

•

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

cursors in the acquisition memory

•

permanent instrument settings

•

measurements when the cursors are on the screen or the trigger type

(1)dt = 500µs, dv =-6,400V Trig 1 Pretrig



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

Position and movement of

Representation and

movement of screen in

acquisition memory

Position and movement

of time trigger

adjustments



Movement of screen to right

in acquisition memory

Permanent

Permanent settings



Cursor measurements

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

(



Example : (1)dt = 500,0 µs, dv = -6,400 V)

•

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

(



Example : (1)Ph = 130.0°)

•

automatic measurements selected by the "Automatic measurements" or "Phase measurement" menu.

(



Example : (1)F = 1.000kHz, Vpp = 15.00 V)

III - 18 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - Display

Indication and adjustment of last selected

Display of ZOOM mode (Z

)

Display of the parameters

Oscilloscope Mode (cont’d)

2. Control zone

The parameters displayed in this zone are:

•

The parameters of each channel and trace: display,

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

•

FFT

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

•

The indication and the active adjustment of the last selected element:

- trigger level, trigger type

- trigger time position

- channel offset value

- X & Y position of cursor

- time display, if no setting has been selected

- symbol of current printing ….

Display of trace parameters (in trace color): validity, coupling, bandwidth limit, sensitivity

Display of ZOOM mode (Z)

Display of function parameters (in trace color): validity, value of division

of a memory : sensitivity, coupling, bandwidth limit



Value of time base coefficient (s/div) in oscilloscope mode or frequency (Hz/div) in FFT mode

Change of signal representation domain (FFT selection)

Contrast

25.0 %

element or otherwise time display and trigger type

•

In SPO mode, the FFT is not available. The SPO logo is displayed.

•

The mouse left key validates the channels and the functions.

•

The «



» 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.

•

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 and functions

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

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 19

Oscilloscope Mode - Display

Oscilloscope Mode (cont’d)

The « Source » 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.



3. Display zone

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

•

The symbol «  » indicates the source and selected trigger mode

•

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

III - 20 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - Display

7 9

ϕϕϕϕ

Oscilloscope Mode (cont’d)

Display elements

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 (not available in SPO) 10 Time position output indicator of trigger outside displayed

11 Trigger level position output indicator outside displayed

12 Channel level output indicator outside displayed window

window (in SPO the trigger is limited to the view zone)

window.

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 21

Oscilloscope Mode - Display

Oscilloscope Mode (cont’d)

Menu accessible

from display zone

How to zoom



Attention

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 «  » symbol indicates that the display is in the « Full Screen » or “Full Trace” 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.

The zoom function is not available in SPO.

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.

How to move the

symbols



•

The « Zoom Out » mode (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: x 100 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.

III - 22 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - Display

Oscilloscope Mode (Cont’d)

Example of an

expanded area

Expanded area (in blue)

Normal mode screen

Expanded mode screen

4. Menu bar

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

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 23

Oscilloscope Mode - The « Vertical » Menu

Oscilloscope Mode (cont’d)

The « VERT » Menu

15MHz

(∗)

Only available in advanced mode if the SPO mode is not selected. See §. Description, page 65.

III - 24 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - The « Vertical » Menu

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

Oscilloscope Mode (cont’d)

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 «



 » 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

AC : blocks the DC component of the input signal and attenuates the signals

lower than 10 Hz.

DC : transmits the DC and AC components of the input signal.

GND : 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

This menu can also be called by clicking with the right mouse key in the

Vertical scale

Coefficient assigns a multiplication coefficient to the selected channel sensitivity.

Limits the bandwidth of the channel and its trigger circuit to reduce display noise and false triggering.



The bandwidth of each channel can be limited to 5 kHz, 1.5 MHz or 15 MHz. The bandwidth limit of a channel is indicated in the control area by following symbols :

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

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  key deletes the previous value of the cursor in this zone.

15 MHz

1.5 MHz

5 kHz

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 oscilloscopes, 60 MHz or 100 MHz III - 25

Oscilloscope Mode - The « Vertical » Menu

∗)

Oscilloscope Mode (cont’d)

Measure unit

math1 math2 math3 math4

Function definition

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

The "Padlock " key can be used to switch between upper-case and lowercase characters.

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



display.

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

Init

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).

defines for each trace a mathematical function and the vertical scale. Menus present only in Advanced mode (see menu « Util », p. 61). 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.

•

The mathematical function can be defined on 2 lines.

•

mathx cannot be used in the definition of a function.

Functions

The  key deletes the character preceding the cursor in the window.

8 predefined mathematical functions can be linked to the traces :

divh( divv( step( sin(

(  divh(1) is equivalent to 5000 samples (counts) = 1 horizontal div.

Validation of the selections by "OK". Exit from the menu without modification by "Cancel".

If … then …

... the dynamic calculation of the vertical scale is impossible

... the dynamic calculation of the vertical scale is possible



CHx + CHy Sensitivity and measuring unit used on CHx CHx - CHy Sensitivity and measuring unit used on CHx

In each cases, the measuring unit can be re-defined and a coefficient can be applied to the measurement results (refer to §. Vertical scale).

("horizontal division") ("vertical division") ("step") using "t" (∗) ("sine")

t = abscissa of the sample in the 50,000-sample acquisition memory.

Particular cases : Value of the measuring unit

cos( exp( log( sqrt(

(« cosine ») (« exponential ») (« logarithmic ») (« square root »)

... a message indicates that the measuring unit on this function will be vertical division (div).

... it takes into account of the sensitivities of the channel sources.

III - 26 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - The « Vertical » Menu

Oscilloscope Mode (cont’d)



Examples

Use of predefined

mathematical

functions

• Predefined divv() function used on its own: math3 = divv(3).

The trace is equal to 3 vertical divisions.

divv(3) = 3 x 32000 LSB = 3 vertical divisions

•

Predefined step() function associated with a trace:

- math2 = ch1*step(t-divh(4))

math2 is at 0 vertical divisions as long as t (time is less than four horizontal divisions).

math2 is equal to ch1 when t (time) becomes greater than four horizontal divisions.

- math2 = ch1*step(divh(4)-t)

math2 is equal to ch1 as long as t (time) is less than four divisions. math2 is at 0 vertical divisions when t (time) becomes greater than

four horizontal divisions.

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 27

Oscilloscope Mode - The « Vertical » Menu

Oscilloscope Mode (cont’d)

Example 1

Appropriate use of the

operators for display

optimisation

Traces ch1 and ch2 are optimised on 6 vertical divisions.

Vhigh ch1 = 3 vertical divisions => 3 x 32000 LSBs = 96000 LSBs Vhigh ch2 = 3 vertical divisions => 3 x 32000 LSBs = 96000 LSBs

Note : 1 vertical division = 32000 LSBs

Addition of two traces - math3 = ch1+ch2

Vhigh

Sensitivity: Ch1 = Ch2 = 1 V/div

Vpp: Ch1 = Ch2 = 6 V Vhigh: Ch1 = Ch2 = 3 V

In this case of trace addition, you can observe a high and low overshoot, division by two is necessary to optimise display of the result.

Vhigh math3 = 6 vertical divisions = 6 x 32000 LSBs =128000 LSBs

> (4 vertical divisions)

- math3 = (ch1 + ch2) / 2

Vertical scale math3 = 1.00 V Vpp math3 = 6.00 V

Vhaut math3 = 3.00 V

Division by two adjusts the addition to the dynamics of the screen

Vhigh math3 = 3 vertical divisions = 3 x 32000 LSBs

Note: The results of the automatic Vhigh and Vpp by math 3 must be

multiplied by two to be correct.

III - 28 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - The « Vertical » Menu

Oscilloscope Mode (cont’d)

For immediate interpretation of the results, configure the "Vertical scale" menu of mathx (see §. Opening from math1, math2, math3, math4 p. 35).

In our example:

• The sum of ch1 + ch2 is the sum of two values in volts, so the result is expressed in volts.

• The sum of ch1 + ch2 must be divided by 2, so the coefficient of math3 can be replaced with 2 to obtain the automatic measurement results of math3 immediately.

• Then select math3 as the reference for the automatic and manual measurements (see "MEASUREMENT" menu, p. 53).

• Then display the table of 18 measurements made on the math3 trace (see "MEASUREMENT" menu, p. 53).

The measurements displayed are the exact result of the addition of the two traces ch1 + ch2 in the correct unit (Volts).

Vhigh

Vertical scale math3 = 2.00 V Vpp math3 =12.00 V

Vhigh math3 = 6.00 V

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 29

Oscilloscope Mode - The « Vertical » Menu

Oscilloscope Mode (cont’d)

Example 2

Sensitivity: Ch1 = Ch2 = 5 V/div Vpp: Ch1 = Ch2 = 10 V

Vhigh: Ch1 = Ch2 = 5 V

Vhigh ch1 = 1 vertical division => 1 x 32000 LSB = 32000 LSBs Vhigh ch2 = 1 vertical division => 1 x 32000 LSB = 32000 LSBs

Multiplication of two

traces

- math3 = ch1*ch2

As for the addition of traces, we can observe a much more significant high and low overshoot.

Vhigh math3 = ch1 x ch2 = 1 vertical division x 1 vertical division = 32000 LSB x 32000 LSB = 1024 106 LSB

> (4 vertical divisions = 128000 LSBs)

The function divv (vertical division) is necessary to optimise the display.

- math3 = (ch1*ch2)/divv(1)

Divv(1) can be used to divide by 32,000 (1 vertical division = 32,000 LSBs): the result of the multiplication is translated into divisions on the screen.

Note: If Vpp of ch1 and ch2 had been 8 vertical divisions, the multiplication would have had to be divided by divv(4).



When mathematical functions associated with traces are used, the

dynamics of the result obtained must be verified.

Correction of the result of the operations by mathematical functions (divv(), divvh(), / …) is recommended to optimise the screen display.

III - 30 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - The « Vertical » Menu

Oscilloscope Mode (cont’d)

For immediate interpretation of the results, configure the "Vertical scale" menu of mathx (see §. Opening from math1, math2, math3, math4 p. 35).

In our example:

• The multiplication of ch1 by ch2 is the multiplication of Volts by Volts, so the result is in square volts.

• div of the measurement unit of math3 can be replaced by V2 (Volts).

• A vertical division represents 5 V x 5 V = 25 V2 (vertical sensitivity

of ch1 x vertical sensitivity of ch2).

• The coefficient of math3 can be replaced by 25 to obtain the result of the automatic math3 measurements immediately.

• Then select math3 as the reference for the automatic and manual measurements (see "MEASUREMENT" menu).

• Then display the table of 19 measurements made on the math3 trace (see "MEASUREMENT" menu).

The measurements displayed are the result of the multiplication of the two traces ch1 and ch2 in the correct unit (V2).

Vertical scale math3 = 25 V2 Vpp math3 =25 V2

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 31

Oscilloscope Mode - The « Vertical » Menu

The period equal to 10,000 samples (2 horizontal divisions) depends on the

Oscilloscope Mode (cont’d)

Example 3

Association

of predefined

functions

- math3 = divv(3)*sin (2*pi*t/10000).

The trace obtained is a sine wave produced using the predefined sin (sine) function, according to its mathematical definition (2 x π x Frequency). The amplitude is 6 divisions (divv(3) x 2 = 3 x 32000 LSBs x 2).

time base.

•

Same trace produced with the predefined divh function:

math3 = divv(3)*sin(2*pi*t/divh(2))

In this example, divh(2) is equivalent to 10,000 samples.

Note: 1 horizontal division = 5,000 samples

The period divh(2) is equal to 10,000 samples (2 horizontal divisions) depends on the time base.

• Production of a sine wave by the predefined cos (cosinus) function:

math3 = divv(3)*cos(2*pi*t/divh(2))

The trace obtained with the predefined cos() function is offset by 90°.

III - 32 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - The « Vertical » Menu

Oscilloscope Mode (cont’d)

Production of an

attenuated sine

wave using

predefined

math1 = sin (pi*t/divh(1))*exp(-t/divh(6))*divv(4)

functions

sin (pi*t/divh(1)) can be used to modify the number of periods. exp (-t/divh(6)) can be used to modify the level of attenuation.

exp (-t) represents: exp(-5000) when you reach the first horizontal division. exp(-50,000) when you reach the tenth horizontal division.

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 33

Oscilloscope Mode - The « Vertical » Menu

Oscilloscope Mode (cont’d)

Files



C1MULC2 .FCT

function

contains the list of the functions (.FCT) saved by the user, along with two predefined files.

By selecting the name of the function with the left mouse button (function name in blue), you can transfer the definition of the function into the 2 lines provided for that purpose.

The scroll bar can be used to scroll through the list of memorized functions.

The function can be modified with the table of usable characters, associating the ch1 and ch2 traces.

This menu also contains two predefined functions. C1MULC2.FCT : ch1*ch2/divv(4) is used to calculate the product of 2

traces with rescaling so that the result fits the screen.

The factor divv(4) is used to optimize the display as long as the source signals have sufficient dynamics (> 5 divisions) and no overshooting.

The MATH functions cannot be accessed in SPO mode.

math3 = ch1*ch2/divv(4) = C1MULC2.FCT

SQUARE.FCT

function

III - 34 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

This is the definition of a square signal using the first 4 harmonics of a Fourier series development.

math3 = SQUARE.FCT math3 = (sin(pi*t/divh(2)) + sin(3*pi*t/divh(2))/3 + sin(5*pi*t/divh(2))/5 + sin(7*pi*t/divh(2))/7)*divv(4)

Oscilloscope Mode - The « Vertical » Menu

Oscilloscope Mode (cont’d)

Save

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

Reset

Vertical scale defines the vertical scale of the selected trace.

completely resets the function definition.

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 as long as the functions have not been defined.

Once a function has

been defined on

mathx, opening the

‘vertical scale’ menu

from math

Coefficient



Measure unit

modifies the value of a selected trace division (div). Modification is by using the mouse with the table of numbers that can be

used after selecting the coefficient zone. The  key deletes the character preceding the cursor in this zone. 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  key deletes the value preceding the cursor in this zone. The "Padlock " key can be used to switch between upper-case and

lower-case characters.

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



display (3 characters max).

Init

re-initializes the coefficient at 1,000 (x1) and returns to a unit of measure in V.

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 oscilloscopes, 60 MHz or 100 MHz III - 35

Oscilloscope Mode - The « Trigger » Menu

Oscilloscope Mode (cont’d)

The « TRIG » Menu

III - 36 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - The « Trigger » Menu

Oscilloscope Mode (cont’d)

Definition

This range of portable oscilloscopes is equipped with "advanced triggers".

•

The "Main" tab can be used to choose and parameterize the main trigger source.

•

The "Delay" and "Count" trigger modes require parameterization of a second "auxiliary" trigger source. The auxiliary source may be the same as the main source.

The trigger choice is validated by exiting from the menu.

If … … the user exits from the "Main" tab, … "Main" triggering is used. … the user exits from the"Pulse" tab, … "Pulse" triggering is used. etc.



•

There is only one Holdoff, although it can be programmed from the "Main", "Delay", "Count", “TV” and “Line” tabs.

When you use "Delay" or "Count", the Holdoff applies to the auxiliary source,

i.e. the source of the count pulses or delay trigger pulses.

In the other cases, Holdoff applies to the main trigger source.

•

Each trigger source has its own specific attributes: Coupling, Level, Edge, Noise Reject, Filter.

then …

etc.

Parameters

Main

Source

Selection of the "Trigger Parameters" Trigger on edge

selects channel as main trigger source

Trigger source : 1, 2, 3, 4 or L (line)

Trigger Source : 1, 2 or S (line)

You can also choose the trigger channel by doublepointing with the mouse in the time base display area.

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 37

Oscilloscope Mode - The « Trigger » Menu

Oscilloscope Mode (cont’d)

Coupling Selection of the filter for the main trigger source:

AC AC coupling (10 Hz to 200 MHz): blocks the DC component of the signal

DC DC coupling (0 to 200 MHz): allows the entire signal through

LF Reject Rejection of source signal frequencies < 10 kHz: facilitates observation of signals with a DC component or an unwanted low frequency

Edge

Level

HF Reject Rejection of source signal frequencies > 10 kHz: facilitates observation of signals with high-frequency noise.

Selection of the trigger gradient: + ascending trigger edge

- descending trigger edge The selected trigger edge is indicated the status area.

454mV Adjustment of the trigger level with the mouse on the scroll bar.

Clicking with right mouse key in this field displays a virtual numeric



keypad which can be used to directly input the value. The trigger level is entered into the current value display area after modification. Fine adjustment is possible.

Noise reject

Holdoff





Example

Selection of the main trigger source

Selection of the trigger level

No hysteresis ≈ 0.5 div. Yes introduces a hysteresis of ≈ 1.5 div.

40.0ns allows:

•

disabling of the trigger for a predefined period

•

stabilization of the trigger on pulse trains.

Double-tapping in this field displays a virtual numeric keypad which can be used to directly input the value.

Clicking with right mouse key in this field displays a virtual numeric keypad which can be used to directly input the value.

Signal injected on CH1: a train of three 6 VDC pulses at a frequency of 20 kHz with a 500 mVDC component, separated by 500 µs.

Selection of the noise rejection

Selection of the trigger slope

III - 38 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Selection of the trigger channel coupling

- DC - Rejet BF - Rejet HF

Selection of the HOLDOFF value from 40 ns to 10.5 s

Oscilloscope Mode - The « Trigger » Menu

Oscilloscope Mode (cont’d)



The trigger is set with channel 1 as the source and a level of 2.04 V, on an ascending edge.

The Holdoff stabilizes the signal by disabling the trigger for 108 µs. The DC coupling of the trigger lets the whole signal through. In this example, the signal does not include noise, so the noise rejection option is

not necessary. The DC coupling of ch1 shows the DC component of the signal.

Pulse

Selection of pulse-width trigger. In all cases, the effective trigger occurs on the pulse trailing edge.

< triggers on a pulse if its width is less than the value set = triggers on a pulse if its width is equal to the value set > triggers on a pulse if its width is greater than the value set

Note : The pulse width is defined by the crossing of the signal with the vertical trigger level.

975 µs Adjustment with the mouse using the time setting scroll bar

Clicking with right mouse key in this field displays a virtual numeric



keypad which can be used to directly input the value.

The choice of the (rising) or (falling) edge in the "Main" tab defines the limits of the analysis:

• edge defines a positive pulse between or

• edge defines a negative pulse between or



Example

Current main source recall

Pulse polarity

Pulse width : < = >

Signal injected on CH1: a train of three 6 VDC pulses at a frequency of 20 kHz separated by 500 µs

Reference pulse width selection from 20 ns to 10,5 s



The trigger parameters in the main menu are active (Source, Level, Edge, etc.). The oscilloscope is triggered when the signal's pulse width is equal to the

specified pulse width (25.0 µs + tolerance). Positive pulse : the width measurement is triggered on the pulse rising edge and

the trigger is effective on the falling edge, if the pulse width respects the chosen comparison criterion (= 25.0 µs in that case).

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 39

Oscilloscope Mode - The « Trigger » Menu

Oscilloscope Mode (cont’d)

Auxiliary source

Delay

Trigger delay



Holdoff



Coupling

Selection of edge trigger with delay The delay is triggered by the auxiliary source.

Effective triggering occurs after the end of the delay on the next event from the main source.

12.4µs Adjustment with the mouse using the setting scroll bar to choose the required delay value.

Clicking with right mouse key in this field displays a virtual numeric keypad which can be used to directly input the value.

40ns Adjustment with the mouse using the setting scroll bar, allows disabling of the trigger for a predefined period and, among other things, stabilization of the trigger on pulse trains.

Clicking with right mouse key in this field displays a virtual numeric keypad which can be used to directly input the value.

selects the channel as the main trigger source

selects the filter for the auxiliary trigger source: AC AC coupling (10 Hz to 200 MHz):

blocks the DC component of the signal

Level

Edge

Noise reject

DC DC coupling (0 to 200 MHz): allows the entire signal through

LF Reject Rejection of source signal frequencies < 10 kHz: facilitates observation of signals with a DC component or an unwanted low frequency

HF Reject Rejection of source signal frequencies > 10 kHz: facilitates observation of signals with high-frequency noise

454mV Adjustment of the trigger level with the mouse on the scroll bar.

Clicking with right mouse key in this field displays a virtual numeric keypad which can be used to directly input the value.

selects the edge for the auxiliary trigger source: + ascending trigger edge

- descending trigger edge

No hysteresis ≈ 0.5 div. Yes introduces a hysteresis of ≈ 1.5 div.

III - 40 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - The « Trigger » Menu

Selection of the auxiliary

Oscilloscope Mode (cont’d)



Example

Selection of the trigger delay applied to the main source from 20 ns to 10,5 s

Selection of the auxiliary source

source trigger level

Selection of the auxiliary source noise rejection

Signal injected on CH1: a train of three 6 VDC pulses at a frequency of 20 kHz separated by 500 µs.

Selection of the auxiliary source coupling

Number of events

Auxiliary source

Count



Holdoff



The trigger is active after the end of the delay (35.2 µs) on the first ascending edge.

The Holdoff stabilizes the signal by disabling the trigger for 108 µs.

Selects the edge trigger with counting of events. The count is triggered by the auxiliary source. The main source serves as a

clock for the count. Effective triggering occurs after the end of the count on the next event from the

main source.

4 Adjustment with the mouse using the setting scroll bar to choose the

Clicking with right mouse key in this field displays a virtual numeric keypad which can be used to directly input the value.

40.0ns Adjustment with the mouse using the setting scroll bar, disabling of the trigger for a predefined period and, among other things, stabilization of the trigger on pulse trains.

Clicking with right mouse key in this field displays a virtual numeric keypad which can be used to directly input the value.

selects a channel as the main trigger source

number of events required.

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 41

Coupling

Selection of the filter for the auxiliary trigger source: AC AC coupling (10 Hz to 200 MHz):

blocks the DC component of the signal DC DC coupling (0 to 200 MHz):

allows the entire signal through LF Reject Rejection of source signal frequencies < 10 kHz

facilitates observation of signals with a DC component HF Reject Rejection of source signal frequencies > 10 kHz

facilitates observation of signals with high-frequency noise

Oscilloscope Mode - The « Trigger » Menu

Oscilloscope Mode (cont’d)

Edge

Level

Noise reject



Example

Selection of the number of events on the main source : from 2 to 16,384

Selection of the trigger edge of the auxiliary source + trigger on ascending edge

- trigger on descending edge 454mV Adjustment of the trigger level of the auxiliary source with the

mouse on the scroll bar.



Clicking with right mouse key in this field displays a virtual numeric keypad which can be used to directly input the value.

No: hysteresis ≈ 0.5 div. Yes: introduces a hysteresis of ≈ 1.5 div.

Signal injected on CH1: a train of five 6 VDC pulses at a frequency of 20 kHz separated by 500 µs.

The trigger is set on the descending edge.



The first edge activates the trigger. It is not included in the count. The trigger is triggered on the third descending edge of the pulse train. The Holdoff stabilizes the signal by disabling the trigger for 232 µs.

III - 42 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - The « Trigger » Menu

Oscilloscope Mode (cont’d)

TV Trigger on a TV line

Standard

Polarity

Holdoff

Video polarity selection

Video standard selection

Line no. selection

Trigger on a specific line number. The trigger starts on the front edge of the line synchronization signal.

•

625 lines (SECAM) or

•

525 lines (PAL)

+ Direct video

- Reverse video Adjusted by scrolling with the mouse. Triggering impossible for a pre-defined time.

Clicking with right mouse key in this field displays a virtual numeric



keypad which can be used to directly input the value.



Example : Video signal

Line



Line

Adjustment of the no. with the mouse using the scroll bar.

Clicking with right mouse key in this field displays a virtual numeric keypad which can be used to directly input the value.

The "" symbol indicates the selected parameters. Validation of the selections by "OK".



Example : Signal injected on CH1 : a picture of the power supply voltage of

the instrument (line voltage : 230 VAC ± 10 %, 50 Hz)

The trigger occurs on the rising front. The trigger source is displayed at the bottom of the screen in the status zone

(l : line)

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 43

Oscilloscope Mode - The « Trigger » Menu

Oscilloscope Mode (cont’d)

Triggered mode Automatic mode

Single mode

The 3 following selections define the trigger mode :

Acquisitions and refreshment of the screen at each trigger event. Acquisition and automatic refreshing of screen even when there is no trigger

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

Acquisition of signal and refreshing of the screen on the first trigger occurring after a trigger reset by pressing the key opposite (or via the time base menu).



•

The "



" symbol indicates the selected trigger mode.

•

The selected trigger mode is indicated in the status area

(Trig'd, Auto, Single).

•

The acquisition status is indicated in the status area: PRETRIG, RUN,

STOP, POSTRIG, READY, …

This selection can also be called up by double-clicking on the time base display area.

A long press on this key forces a trigger even without a signal.

III - 44 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - The « Horizontal » Menu

)

(∗∗)

Oscilloscope Mode (cont’d)

The « HORIZ » Menu

(∗)

Only available in advanced mode, if the SPO Persistence mode is not selected. See §. Description, page 65.

(∗∗)

The FFT function is not available

in SPO Persistence mode.

(∗

Repetitive Signal

min/max Acquisition

Menu present only in "Advanced" mode (see "Util" menu, p. 65).

The "" symbol indicates that the "Repetitive Signal" option has been



selected. Activation of this option increases the time definition of a trace (up to

100 GS/s) for a repetitive signal. For time bases lower than 50 µs/div (without active zoom mode), the

signal displayed is reconstituted canceling the acquisitions.



Example : measurement on a microprocessor bus.



If the signal is not repetitive, do not use this option, as the cumulated representation could be wrong. The time resolution will then be 10 ns (or 5 ns if only one channel is active). In this mode, all the displayed points are refreshed with each acquisition.

allows the signal to be sampled at high frequency (100 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, ≥ 10 ns).

Whatever time base is being used, the short-term events (Glitch, ≥ 10 ns) will be displayed.

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



Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 45

Oscilloscope Mode - The « Horizontal » Menu

Oscilloscope Mode (cont’d)

Averaging

No averaging Average rate 2 Average rate 4

Average rate 16 Average rate 64

FFT (Fast Fourier Transform)

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.

The averaging coefficient are: no averaging averaging by 2, 4, 16, 64.

The calculation is made using the following formula: 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 «



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.



» symbol indicates the selected average rate.

(1-1/Average rate)

N-1



Description

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.

The Fast Fourier Transform is calculated according to the equation:

−

X (k) =

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.

1 2

x n j

* ( )*exp −

∑

=−

  



for k ∈ [0 (N – 1) ]

 

III - 46 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - The « Horizontal » Menu

Cursor 2

The modification of the

Cursor 2

Oscilloscope Mode (cont’d)

Attention : sensitivity in FFT

mode applies to the input signal. Check that the signal observed is not saturated in Oscilloscope mode.

5 Vpp

Square signal on ch2 of 10 kHz and

FFT with a Hanning window and a

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:

12,5

scan factor

FFT with a rectangular window and a

linear scale

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 sinusoidal signal having 1 V division in time-related representation.

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



∗

Graphic representation

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

•



Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 47

The «

selected scale.

•

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

frequency representation (see §. Menu « Measurement » p. 53).

•

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



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

» symbol, appearing before one of the options indicates the

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

III - 48 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - The « Horizontal » Menu

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.

Effects of under-sampling in frequency representation:

Window type

Rectangular window Hanning window Hamming window Blackman window

Main lobe

width

- 13 dB

- 32 dB

- 43 dB

- 94 dB

Max. amplitude of side

lobe (compared to main

lobe)

4 π/N 8 π/N 8 π/N

12 π/N

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 «  selected function.



symbol appears in front of one of the options, indicating the



Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 49

Oscilloscope Mode - The « Display » Menu

Oscilloscope Mode (cont’d)

The « DISPLAY » Menu

(∗)

Only available in advanced mode if the SPO Persistence mode is not selected. See §. Description, p. 65.

LCD adjustment

LCD contrast and brightness adjustment. This function has the same effect as the following

(∗)

key.

Graticule Display modes

Envelope

Zoom off



Attention

Vector





Used for displaying grid or not. There are two available display modes if the SPO Persistence mode has not

been selected : 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 “



” symbol indicates that the display mode is active.

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

•

zoom mode.

This function is inactive if the SPO Persistence mode is activated.

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

This function is inactive unless the screen is in zoom mode. The letter Z in the trace parameter and time base zone denotes the

III - 50 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - The « Display » Menu

Mode Oscilloscope (cont’d)

Full screen



Full trace

Attention

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

This function is inactive if the SPO Persistence mode is activated.

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 “ ” 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.

activates/deactivates the horizontal division of the display area by two. The « Full Trace » function activated is indicated by :

- the presence of a horizontal continuous feature in the middle of the display area

- a graticule divided vertically into 2 zones of 8 divisions

- traces 1 and 3 assigned to the higher part of display

- traces 2 and 4 assigned to the lower part, so as to remove their superposition The traces can be then vertically moved in both areas.

Oscilloscope

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

The “





” symbol indicates the active mode.

This is the basic operating mode.

Each trace is represented by a single colour : CH1 = red, CH2 = green, Math3 = blue, Math4 = violet.

All the acquired points have the same intensity whatever their occurrence is. In the example below, all the points appear with the same colour, even those

corresponding to a random signal noise.

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 51

Oscilloscope Mode - The « Display » Menu

Mode Oscilloscope (cont’d)

(inactive in SPO)



Example

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

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 - 52 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - The « Measurement » Menu

Trace 4

Only available in advanced mode,

Oscilloscope Mode (cont’d)

The « MEASURE » Menu

(∗)

if the SPO Persistence mode has not been selected. See §. Description, page 65.



Attention

Reference

Trace 1 Trace 2 Trace 3

Automatic measurements

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 53

The Automatic Measurements, the Phase Measurement of and the Unattached Cursors are not available in “Persistence SPO” mode.

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 « 

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.



» symbol indicates the reference trace.



Oscilloscope Mode - The « Measurement » Menu

Oscilloscope Mode (cont’d)





Attention

Reference memory

difference



Example

• It is possible to select two permanent measurements.

• The « 

into the status zone.

• Activating automatic measurements reveals two cursors (+) on the curve at the beginning and end of the period. Some measurements need to be present at least one period 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 «  the automatic measurements table).

The automatic measurements are not available in SPO Persistence mode.

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 p. 58).

Calculation made and displayed on one of the 19 measurements:

Vpp (

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



» symbol indicates the measurement(s) that will be entered



Reference memory difference



» symbol in



) = Vpp (Trace 1) – Vpp (Trace 1  Ref 1)



19 automatic

Vmin

Vmax

Vpp

Vlow Vhigh Vamp

Vrms

Vavg

Over+

Trise

Tfall

W+

W-

Over-

Sum

•

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  Ref. 1).

•

Condition: the reference trace must have the same characteristics as the associated trace (sensitivity and time base).

measurements

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 duty cylce number of pulses negative overflow

summon of instantaneous values of the signal (Σ elementary areas Vs unit)

III - 54 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - The « Measurement » Menu

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

L L

Oscilloscope Mode (cont'd)

Measurement conditions

Automatic measurement presentation

•

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

•

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

100%

90%

50%

Vavg

>5%T

Vhigh

Vamp Vpp

10%

Trise

t0t1t2 t3t4t5

Tfall

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

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

i n

• Vrms =

•

Vavg =

•

Vsum =

[ (y y ) ]

∑

i 0

i n

∑

i 0

∑

−

(y y )

−

δ×

)(y

GND

2 1/2

Vlow Vmin

>5%T

= value of representing zero Volt

GND

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 55

Oscilloscope Mode - The « Measurement » Menu

Oscilloscope Mode (cont'd)

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 «

•

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

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 the measurement display status zone

( E.g.: (1)Ph (2) = 180.0°).

•

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 «

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.





» symbol indicates the selected trace for phase measurement.

are made.



» symbol indicates that the manual measurements (dt, dv) are

E.g. : (1)dt = 500,0 µs, dv = -6,400 V

Manual phase measurement

III - 56 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

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 « » 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 ϕ can be moved freely even if the "Unattached

cursors" menu is not active.

•

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

measurement display status zone.



E.g.: (1)Ph = 130.0 °

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 « 



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 «



symbol indicates that the "Unattached cursors" menu is



-.--

» will appear in the measurement display zone.

De-select the automatic measurements to validate the manual



measurements (dt, dv).

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 57

Oscilloscope Mode - The « Memory » Menu

stored in the reference memories. The references (Ref. 1, 2, 3, 4) appear

the corresponding trace has

Oscilloscope Mode (cont'd)

The « MEMORY » Menu

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



Attention



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.

If the SPO mode is active in the oscilloscope, the traces may not be greyed.

• For optimum comparison : 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 « » symbol in the menu indicates that 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.

A reference memory is volatile, it can be lost at the extinction of the instrument.

III - 58 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - The « Memory » Menu

Oscilloscope Mode (cont'd)

Trace

Save .TRC

Save.TXT



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. 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  Recall » menu.

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



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  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 virtual keyboard and the mouse. The  key is used for deleting the displayed letter preceding the cursor in this zone.

∗

Once the name has been written, the  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.



•

The file name is limited to a maximum of 15 characters + the extension, otherwise the following message appears : “File name too long”.

•

As soon as the mouse pointer is 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 oscilloscopes, 60 MHz or 100 MHz III - 59

Oscilloscope Mode - The « Memory » Menu

Oscilloscope Mode (cont'd)

Recall.TRC

Configuration

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

« Trace  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  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 replaced by the recalled trace.

• When a trace is recalled, Mx appears in the destination trace parameters. The sensitivity, coupling and bandwidth limit become those of the restored trace (they cannot be modified).

• In this menu, the virtual keyboard is ineffective.

used for saving or recalling an equipment configuration.

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

∗ 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 virtual keyboard. It is used for

modifying it (left mouse key).

∗ When the source file name has been entered, the  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 15 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  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  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.

• In this menu, the virtual keyboard is ineffective.



III - 60 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

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

Oscilloscope Mode - The « Utilities » Menu

Oscilloscope Mode (cont'd)

The « UTIL » Menu

(∗)

(∗) USB : when the USB cord has been detected

1 6

xx/xx/06

xx/xx/07

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 61

Oscilloscope Mode - The « Utilities » Menu

Oscilloscope Mode (cont'd)

Files

File type

Selection of the "File Management" menu. It contains the files which have been:

•

recorded since the instrument was first used

•

created since the last startup.

The files will only be saved once and for all when the instrument is switched off using the ON/STD BY key :

If there is a mains power cut during saving of the configuration, the files in the file manager will be lost.

The configuration back-up files (.CFG), for traces in oscilloscope mode (.TRC), for traces in SPO persistence mode (.PER), for sampling (.TXT), for functions (.FCT), for printing (.PRN, .PCL, .EPS, .BMP, .GIF) are accompanied by the date and time when they were saved and their size. The selected file appears in grey. The scrollbar on the right is used for moving through the list.

Selection of the file type required, using the corresponding filter:

.CFG .TRC .PER .FCT .PRN .PCL .EPS .BMP .GIF .REC .TXT

The mouse is used for selection. " ∗. ∗ " can be used to select all the file types. The storage capacity of the file manager is 15 Mbyte.

Open

Erase

Erase*.*

Export

causes restoration of the file selected by the “File Copy” menu. deletes the selected file. deletes all the files the extension of which has been selected in “File type”. transmits the file over the active communication interface (RS232 or

USB/CENTRONICS), network. You can exit from this menu by pointing with the mouse on the icon in the top

right-hand corner of the window.

III - 62 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - The « Utilities » Menu

Oscilloscope Mode (cont'd)

I/O port config.

RS 232

Speed

Format

Parity

Stop bits

Protocol

Configuration of the

"Network" menu

Physical address

Selection of the "RS232" or "Network" menus. This menu can be used to configure the "serial" remote programming interface or the "network" interface (ETHERNET).

This interface uses the connector (SUBD25) at the back of the instrument. selects the transmission speed : 300 to 115,200 Baud. selects the word length: 7 or 8 bits. selects the type of parity: even, odd or no parity (none). selects the number of stop bits (1 or 2 stop bits). selects the serial link management mode. Hard Hardware: the protocol is provided by the RTS and CTS lines

of the RS232 link. Soft Software: use of the XON and XOFF characters to synchronize transmission and reception of the messages (reduced "3-wire" link) None No protocol checking



•

The "" symbol indicates the selected option.

•

The option can be modified using the stylus.

(Ethernet)

(RJ45 connector) corresponds to the address of the oscilloscope on the Ethernet network. This address cannot be modified (it is specific to the instrument)



Example: 00-50-C2-29-10-00

IP address

Printer or LPD server:

IP address

Name

corresponds to the IP address of the oscilloscope on the Ethernet network. This address can be input automatically or manually with the keyboard, after

selecting the zone to be modified. An IP address can be assigned automatically by a DHCP server, if the server

is accessible, using the icon "supplied by a DHCP server".



Example: 132.147.200.74

corresponds to the IP address of the printer (or PC) to which the printer is connected. In this case, the "LPD Server" software needs to be installed.

This address must be input manually with the keyboard, after selecting the zone to be modified.



Example: 132.147.240.1

Name of the printer as it appears in the printing server (or PC). If the printer is connected directly to the network, do not enter anything here.

This key is accessible in the "Advanced" mode only. It gives access to the manual programming of the Subnet Mask and to the programming of the IP address of the Gateway.

Validation of the selections by "OK". Exit from the menu without modification by "Cancel".

USB to RS232

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 63

Configures itself automatically, as soon as the user connects the oscilloscope to the PC by means of a cable USB. When USB to RS232 interface is used, exit SUBD25 is automatically configured in CENTRONICS.

Oscilloscope Mode - The « Utilities » Menu

Oscilloscope Mode (cont'd)

Hardcopy

Configuration

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: Network,

RS232 or USB, CENTRONICS or to file.

•

If the RS232C interface is selected, the parameters (speed, format, parity, stop bit, protocol) must be configured in the "Config I/O Ports" menu. Check that the configuration matches the configuration of the peripheral device connected to the instrument.

•

If the "Network" option is selected, the parameters (IP address, printer) must be configured in the « Config I/O Ports  Network" menu).

•

The "File" option is a way of recording the hardcopy in a file. ".bmp" and ".gif" image formats can be used directly in the Windows applications (word processing, presentations, etc.). As soon as the printout is activated, the "File copy" menu opens and you have to enter the name of the file generated (see "Trace  Save" menu).

when selected, opens the « Configuration » menu. This menu is used for configuring the equipment.

Date/time

Language

Screen saver

Automatic switch

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.

selects the language in which the menus are written. 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, none.



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

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

off



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, 24 h. The equipment is reactivated using the key shown opposite.

•

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 ».

III - 64 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode - The « Utilities » Menu

math1, math2, math3, math4

Oscilloscope Mode (cont'd)

System

Startup sequences

Use duration

Last calibration date

Next calibration date

« Advanced » Mode

Menus present in

« Advanced » mode

only:

used for sending the user information about the life of the equipment starting from commissioning.

indicates the number of equipment starts. indicates the total utilization time in hours. indicates the date of the last equipment calibration. indicates the date of the next equipment calibration. Periodic equipment

calibration is necessary to guarantee the unit within the 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.

 accessible through the « Vert » menu

repetitive signal averaging

 accessible through the « Horiz » menu

unattached cursors





Attention

•

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

•

Modification uses the mouse left key.

•

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

In “Persistence” display, Math {1, 2, 3, 4} functions, Repetitive signal, Averaging and XY modes are inactive and appear in grey ...

In "non-advanced" mode, the instrument's configuration is not saved when it is shut down using the ON/STD BY key and the default factory configuration is loaded at next start-up.

 accessible through the « Display » menu  accessible through the « Measurement »

Two-channel digital oscilloscopes, 60 MHz or 100 MHz III - 65

Oscilloscope Mode - The « Help » Menu

Oscilloscope Mode (cont'd)

The « ? » Menu

Help

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.

MTX3354, VX.XX/XXX

About

Reminder

The   keys are used for scrolling through the description of the keys on the front panel.

Any press on a key of the keyboard causes the display of the on-line help of the depressed key. The functions associated with the keys are not launched.

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 with :

- the name of the instrument

- the software version

- the instrument version

This file refers to the equipment software version and gives its date of creation.

Exit from the menu is by OK.

By connecting you on the website www.chauvin-arnoux.com you will be able to record the software, then to download the updates.

By the E-mail address, you will contact a technical hot-line ; a technician will answer your possible questions.

III - 66

Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode with "SPO" - Keys - Display

Parallel

Oscilloscope Mode with "SPO"

Smart Persistence Oscilloscope The Keys

With "SPO", the keys operate exactly as described for the Oscilloscope mode without "SPO" (see p. 13).

The message "Impossible in this mode!" is displayed if the key pressed is not active.

Display

Presentation The "Smart Persistence Oscilloscope" mode (SPO) is activated using the

"Display" menu in Oscilloscope mode (see p. 50). "SPO" persistence:

•

reveals unstable phenomena, transients and glitches

•

shows the evolution of the signal over time, jitters and modulations

as in analogue oscilloscopy

•

causes persistence of the acquisitions during a preset time for

observation of an accumulation of traces. The brightness or the colour allocated to the point on the screen will diminish if it is not renewed in a subsequent acquisition.

3 dimensions are involved in acquisition:

- time

- amplitude

- occurrence, which is a new dimension. See next page.

Acquisition

The "SPO" processing optimizes detection of transient phenomena:

without "SPO"

The acquisition, display and processing tasks are sequential.

with "SPO"

The acquisition and processing tasks are in parallel. The number of acquisitions per second can be multiplied by 100. The interval between two acquisitions is therefore significantly reduced.

1 acquisition = 1 display

Processing

Acquisition

Display

n acquisitions = 1 display

Fast

Acquisition

processing

Screen representation of 500 points out of 50,000 points acquired.

Display of a segment to link the points together.

Screen representation of 50,000 points acquired, using a smart compression system.

Display of a cloud of points which are not linked together. No interpolation.

Display

Two-channel digital oscilloscopes, 60 MHz or 100 MHz IV - 67

Oscilloscope Mode with "SPO" - Keys - Display

Menu bar

Status area

rent

Oscilloscope Mode with "SPO" (cont’d)

Smart Persistence Oscilloscope

Occurrence



Examples

This provides a statistical dimension to the distribution of the samples. The colour or brightness highlight the irregularities in the signal. They are

also used to differentiate between rare points and frequent points. It is possible to modify this parameter by adjusting the duration of

persistence (see p. 72, Display menu with "SPO").

•

Monochrome representation in green:

- the dark green points are renewed

frequently,

- the light green points are renewed less frequently.

•

Multi-colour representation:

- the red points are renewed frequently,

- the violet points are renewed less frequently.

Display

Composition

3. Display area

Direct access to main settings

IV - 68 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

2. Command area

Display and adjustment of cur

Oscilloscope Mode with "SPO" - Keys - Display

representation (see p. 73)

Oscilloscope Mode with "SPO" (cont’d)

Smart Persistence Oscilloscope

1. Status area

Tool bar

Bargraph: see p. 18. Adjustment:

Permanent

See p. 18.

adjustments

Cursor

See p. 18.

measurements

Automatic

Impossible in this mode.

measurements

Adjustment of persistence

duration (see p. 72)

Refreshing of display:

all the traces displayed on the

screen are erased.

Monochrome

representation (see p. 73)

Multicolour

2. Control area

3. Display area



Notes

The parameters which differ are described below:

No display of ZOOM mode (Z), option unavailable.

The MATH functions are not available.

No FFT function, FFT not available.

Analogue persistence has been activated!

See p. 21.

This symbol (ref. 5, p. 21) is not visible: automatic measurements are not available in "SPO" mode.

Two-channel digital oscilloscopes, 60 MHz or 100 MHz IV - 69

The Zoom box (ref. 9, p. 21) is present, but inactive because the Zoom option is not available in "SPO" mode.

Oscilloscope Mode with "SPO" - Keys - Display

Oscilloscope Mode with "SPO" (cont’d)

Smart Persistence Oscilloscope

Menu accessible from display area

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



Note

These options are also accessible via the Display menu in "SPO", see p. 72.

4. Menu bar

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

IV - 70 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode with "SPO" - The "Vertical" menu

Oscilloscope Mode with "SPO" (cont’d)

Smart Persistence Oscilloscope The "VERT" menu

(∗) (∗) (∗) (∗)

Display See p. 25.

ch1 ch2 ch3 ch4 See p. 25.

The "TRIG" Menu

See p. 36.

These greyed functions

(∗)

are not available.

 Special case

The "HORIZ" Menu

Single mode:

The persistence duration is forced to "Inf." (no ageing of the samples). Every time there is a new acquisition, the traces are cumulated. To refresh the screen, use the button .

(∗) (∗)

(∗)

The greyed functions are not available.

Repetitive Signal

Min/Max Acquisition

Two-channel digital oscilloscopes, 60 MHz or 100 MHz

This greyed function is permanently active. It is ticked by default and cannot be deselected.

See p. 45.

IV - 71

Oscilloscope Mode with "SPO" - The "Display" Menu

Oscilloscope Mode with "SPO" (cont’d)

Smart Persistence Oscilloscope

(∗)

(∗) (∗) (∗)

The "DISPLAY" Menu

(∗)

The greyed functions

are not available.

Oscilloscope

SPO Persistence

XY Adjustment of LCD

Grid

Mode

Zoom off

Full screen Full trace

Select the "Oscilloscope" mode.



The "" symbol indicates that this mode is active.

Select the "Smart Persistence Oscilloscope" display mode.



The "" symbol indicates that this mode is active.

This display mode is not available with "SPO". See p. 50.

See p. 50. This function is not available with "SPO". This function is not available with "SPO".

This function is not available with "SPO".

See p. 50.

IV - 72 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode with "SPO" - The "Display" Menu

Example

Oscilloscope Mode with "SPO" (cont’d)

Smart Persistence Oscilloscope (SPO) Persistence

parameters





Instructions

Representation

Monochrome

Duration

opens a dialogue box giving access to all the specific "SPO" settings. These settings are also available in the settings bar (see p. 69).

selects the display duration (100 ms, 200 ms, 500 ms, 1 s, 2 s, 5 s, 10 s, infinite) for the points acquired.

A point which is not renewed will disappear according to the duration set for it. On the screen, this point will fade until it disappears.

Ageing only comes into effect in the presence of a trigger.

In "Trigger mode", a trace will not age if the oscilloscope is not triggered.

•

To detect rare phenomena, you must set a duration ≥ 2 s, i.e.: 2 s, 5 s, 10 s or infinite.

•

You are advised to adjust this duration to show the statistical distribution of the points displayed.

Selects the representation:

- monochrome or

- multi-coloured This is a unilateral choice: either all the channels are monochrome,

or all the channels are multi-coloured, The intensity of a point is represented by a single colour, from the darkest

shade to the lightest:

- the darker the colour, the greater the frequency of point renewal

- the lighter the colour, the rarer the point is



Example: Monochrome channel: shading of green for channel 2

Direction of decreasing occurrence of the points

Multicolor

Tool bar Choice of representation in the status area:

The intensity of a point is shown by several colours:

- the warm colours (red, orange, yellow) show the points renewed frequently,

the cold colours (green, blue, violet) show the rarer points.



Example: Multi-colour channel

Direction of decreasing occurrence of the points

- if "Bargraph" is selected, it is displayed (see p. 69),

if "Adjustment" is selected, the settings bar is displayed (see p. 69).

Two-channel digital oscilloscopes, 60 MHz and 100 MHz IV - 73

Oscilloscope Mode with "SPO" - The "Measurement" Menu

Oscilloscope Mode with "SPO" (cont’d)

Smart Persistence Oscilloscope

The "Measurement" Menu

(∗)

These functions are not available.

Reference

Trace 1 Trace 2 Trace 3 Trace 4

See p. 52

(∗) (∗)

This function is ticked because it is permanently active

Automatic measurements

Phase measurement

Phase Trace 1 Phase Trace 2 Phase Trace 3 Phase Trace 4

Manual measurements (dt, dv)

Manual phase measurement

Unattached cursors

Automatic measurements are not available.

This function is not available.

See p. 52. The function with the cursor attached to the curve is not available.

See p. 52. This function is permanently active. It is not possible to deselect it.

IV - 74 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Oscilloscope Mode with "SPO" - The "Memory" Menu

Oscilloscope Mode with "SPO" (cont’d)

Smart Persistence Oscilloscope The "MEMORY" Menu

These greyed functions are not available.

Trace 1  Ref. 1 Trace 2  Ref. 2 Trace 3  Ref. 3 Trace 4  Ref. 4

Trace

Save '.PER’ Saving of the files for subsequent recall on the oscilloscope screen

Recall

These functions are not available.

Saving (in non-volatile memory) or recall of a trace. It is saved in the format: ‘.PER’.

The "File copy" menu is adapted to the type of format selected.

The back-up files will take the suffix ‘.PER’ ; they can be recalled in the "Trace  Recall" menu.

The back-up procedure for a file is identical to the procedure in oscilloscope mode (see p. 59). Only the file's suffix changes.

Opens a "File Copy" menu when selected. The "'Source" list contains a list of the ‘.PER’ files which have been

recorded using the "Trace  Save.PER". The recall procedure for a file is identical to the procedure in oscilloscope

mode (see p. 59). Only the file's suffix changes.

Configuration Saving or recalling of an instrument configuration. The procedure is identical

Two-channel digital oscilloscopes, 60 MHz or 100 MHz

to the procedure in oscilloscope mode (see p. 60).

IV - 75

Oscilloscope Mode with "SPO" - The "Utilities" Menu - "Help"

Oscilloscope Mode with “SPO” (cont’d)

Smart Persistence Oscilloscope The « UTIL » Menu

See p. 61.

The « ? » Menu

See p. 66.

V - 76 Two-channel digital oscilloscopes, 60 MHz and 100 MHz

Harmonic Analysis » Mode - Display

« Harmonic Analysis » Mode

Installation

The keys

Display

Presentation

The « Harmonic Analysis » mode is an option of the oscilloscope which must be installed to function.

The instructions of installation are on the diskette (readme.txt file) delivered with this option.

Same as the ones described in the « Oscilloscope » mode (see p. 13). If a function is impossible, a corresponding message is displayed on the

screen.

Harmonic analysis displays the fundamental and the 31 harmonics of the signal present at ch1 or ch2 input.

In this mode, the trigger is automatic and the time base is adaptive, and not manually adjustable.

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

The adjustments of the channel parameters remain active (Sensitivity/ Coupling, Vertical scale, Bandwidth limit).

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.

Display

Two-channel digital oscilloscopes, 60 MHz or 100 MHz V - 77

adjustments

information

display

harmonic

« Harmonic Analysis » Mode (cont’d)

Harmonic Analysis » Mode - Display

Composition

1. Display zone

Trace

Harmonic mode display is divided into 4 functional zones:

4. Menu base

1. Display zone

Direct access

to current

3. Status zone

2. Control area

Selection of

fundamental or

Display of

information about

selected

fundamental or

harmonic

displays the result of harmonic analysis of a single trace (ch1 or ch2) or the 4 traces simultaneously (ch1 and ch2).

The harmonic analysis of the ch1 and ch2 trace is shown in the 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%).

2. Control zone

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 « » symbol indicates the selected harmonic.

•

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

Display of trace parameters in trace color: validity, coupling, bandwidth limit, sensitivity

•

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 « » symbol indicates whether the channel is selected.

V - 78 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Information display about

traces

harmonic

Harmonic Analysis » Mode - Display

« Harmonic Analysis » Mode (cont’d)

3. Status zone

The « Signal» zone

The

« Fundamental Ref. »

or « Harmonic » zone

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

Signal

Information display about

fundamental or selected

indicates:

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

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

- 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

4. Menu toolbar

- 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.

Two-channel digital oscilloscopes, 60 MHz or 100 MHz V - 79

Harmonic Analysis Mode - The « Vertical » Menu

15MHz

Harmonic Analysis Mode (cont'd)

The « VERT » Menu

Display



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

• Harmonic analysis of the ch1 and ch2 signal is represented in the

colour of the trace.

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

V - 80 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Harmonic Analysis Mode - The « Vertical » Menu

Harmonic Analysis Mode (cont'd)

ch1 ch2

Sensitivity/Coupling

Channel Sensitivity



Coupling



Bandwidth limit



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

modifies the parameters of the selected channel. 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

AC : blocks DC component of the input signal and attenuates the signals

lower than 10 Hz.

DC : transmits the DC and AC components of the input signal GND : the instrument connects intern 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.

Limits the bandwidth of the channel and its trigger circuit to reduce display noise and false triggering.

The bandwidth of each channel can be limited to 5 kHz, 1.5 MHz or 15 MHz. The bandwidth limit of a channel is indicated in the control area by following symbols :

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

15 MHz 1.5 MHz

5 kHz

Vertical scale

Coefficient

Measure Unit

Init

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

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

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



according to this coefficient.

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  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.



re-initializes the multiplication coefficient at 1.0 and returning a measure unit in V.

Two-channel digital oscilloscopes, 60 MHz and 100 MHz V - 81

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

Harmonics Mode - The « Horizontal » Menu

Harmonic Analysis Mode (cont'd)

The « HORIZ » 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 « » symbol indicates the selected average rate.



V - 82 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Harmonic Analysis Mode - The « Display » Menu

Harmonic Analysis Mode (cont'd)

The « DISPLAY » Menu

FundHarmonic 16

Even harmonics Odd harmonics

These menus allow the display, according to 3 groups, of the harmonic composition of one or four selected signals.

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

The chosen selection appears under the composition display.

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



indicates the one selected.

• The selection is preserved during a change of display.

Two-channel digital oscilloscopes, 60 MHz or 100 MHz V - 83

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

Harmonic Analysis Mode (cont'd)

The « MEMORY » Menu

The « UTIL » Menu

The « ? » Menu

See description in "Oscilloscope" mode, p. 58.

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

instrument configuration.

See description in « Oscilloscope » mode, p. 61.

See description in « Oscilloscope » mode, p. 66.

V - 84

Two-channel digital oscilloscopes

Recorder Mode - Keys

Recorder Mode

Installation

The Keys

4 "UTILITY" keys

The « Recorder » mode is an option of the oscilloscope which must be installed to function.

The instructions of installation are on the diskette (readme.txt file) delivered with this option.

Same as the ones described in the « Oscilloscope » mode (see p. 13). If a function is impossible, a corresponding message is displayed on the screen.

Pressing this key will configure the instrument in the following modes: « oscilloscope », « harmonic analyser » (option), « recorder » (option).

(or keypad)

LCD contrast and brightness setting (see “Oscilloscope” mode, p. 13).

Full screen display (see “Oscilloscope” mode, p. 13).

1 "AUTOSET" key

Selective

«AUTOSET»

with

1 help key

Take a screen shot (see “Oscilloscope” mode, p. 13).

No action. (Pressing this key displays the message: “Impossible in this mode!”).

No action. (Pressing the key displays the message: “Impossible in this mode!”).

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

depressed key (except for the key ????). 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.

Two-channel digital oscilloscopes, 60 MHz or 100 MHz VI - 85

Recorder Mode (cont’d)

full screen display of the fault on the left of the screen

The main cursor is positioned over the trigger, on the magnified fault while

Recorder Mode - Keys

2 "ACQUISITION " keys

2 «TRIGGER» keys

3 "MEASURE" keys

No action. (Pressing the key displays the message: “Impossible in this mode!”).

This key has two functions:

RUN = launches an acquisition STOP = stops an acquisition

If the recorder is in memory display (see §. Memory Menu  Recall “.REC”, p. 107), the message “Impossible in this mode!” appears when this key is pressed.

By successive pressing, selection of the different Trigger of the last selected channel (see §. Trigger Menu, p. 97).

No action. (Pressing the key displays the message: “Impossible in this mode!”).

The 19 automatic measurements of the reference trace are displayed (see “Oscilloscope” mode, p. 54).



Particular case

2 "HORIZONTAL" keys

In “fault capture” (or “file capture”) mode, if the screen shows several faults at once, the “automatic measurement” function is impossible and the message “Impossible in this mode!” is displayed.

Selection (by succesive presses) from the traces displayed, of the reference trace for automatic and manual measurements (see “Oscilloscope” mode, p.

53). No action.

(Pressing the key displays the message: “Impossible in this mode!”).

Setting of " the recording time / sampling " by the encoder wheel. H-POs. has no action. The message :”Impossible in this mode” is diplayed, if

the thumbwheel TOGGLE key is pressed.

• Action identical to that in “Oscilloscope” mode, when fault capture and file capture mode are not selected (see p. 15).

• Fault capture or file capture mode is selected:  1st press: “Zoom on” 

the auxiliary cursor is on the right of the screen. Displacement in the list of defects by the encoder wheel.

 2nd press: “Zoom off”  10 consecutive faults are displayed on the screen. The cursors are no longer displayed.

Note : Z-pos is not active.

VI - 86 Two-channel digital oscilloscopes, 60 MHz and 100 MHz

Recorder Mode - Keys

Recorder Mode (cont’d)

Definition of terms

used

(id. “Oscilloscope”

mode)

5 "VERTICAL" keys

Validated channel: Display enabled, trace displayed after RUN Displayed channel: Channel validated, trace present on the screen Selected channel: enables the modification of the sensitivity (V/div) of

this channel through the thumbwheel. The TOGGLE key authorizes the vertical displacement of the channel (V-POs.) The parameters of this channel can be set using the following key :

Before pressing one of the next keys :

The signal concerned is not displayed.

The signal concerned is displayed but the channel is not selected.

The signal concerned is displayed and the channel is selected.

Stage 1 Stage 2 Stage 3

Press 

After pressing one of these

previous keys:

The signal is displayed and the verical channel is selected. The wheel encoder is assigned to the adjustment of its sensitivity.

Double pressing of one of those keys devalidates and erases the concerned signal.

No action. (Pressing the key displays the message: “Impossible in this mode!”).

In “Recorder” mode, the DC input coupling is constant. The DC symbol is permanently displayed.

The « Recorder » mode is adapted to very low signals. In « Fault Capture » mode : if a periodic signal of frequency > 65 Hz is injected at the inputs (horizontal scale duration of recording = 2 s), there is no trigger.

Two-channel digital oscilloscopes, 60 MHz or 100 MHz VI - 87

Recorder Mode - Display

Menu bar

Status area

information loss involving

segmented to allow the

a triggerd acquisition of

Recorder Mode (cont’d)

Display

Normal

mode display

Display in

fault capture and file

capture modes

The user views 500 points on the screen (in “MIN/MAX” mode) to eliminate the risk of information loss involving the 50,000 points in the memory.

The user views 500

The memory is

points on the screen (“MIN/MAX” mode) to

acquisition of 100

eliminate the risk of

faults. A fault corresponds to

the 50,000 points in the memory.

500 samples. 2 modes of

visualization:·

- 10 contiguous faults

- only 1 full-screen fault

Composition

The composition of the “Recorder” mode display is identical to that in “Oscilloscope” mode.

Reminder: The display is divided into 4 functional zones.

3. Display area

Direct access to current settings

2. Control area

Display and setting of current value

VI - 88 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Recorder Mode - Display

Time of acquisition of sample

Recorder Mode (cont’d)

1. Status area

configuration

Move to the left in

the acquisition

Standard

Time of acquisition of 1st

sample viewable in the

displayed window

memory

Three pieces of general information appear in this area:

•

The bargraph, representing the screen position and the cursors in the

acquisition memory;

•

Instrument settings (fault capture mode, zoom, etc.);

•

Acquisition times:

of the first sample that can be viewed, of the sample under the main cursor, of the sample under the auxiliary cursor.

Time of acquisition of sample located under

the main cursor

located under the auxiliary

cursor

The curves displayed

10:23:10

13:23:25

17:14:20

are stored in the

memory

Configuration if

delayed start-up is

enabled

Screen position in the

acquisition memory

Display in fault capture

mode

Position of main/auxiliary cursors in the acquisition

memory

Zoom active

Delayed start-up time

10:23:10

When the acquisition starts, the display returns to its standard configuration.

Move to the

right in the acquisition

memory

Two-channel digital oscilloscopes, 60 MHz and 100 MHz VI - 89

Recorder Mode - Display

magnified screen

Recorder Mode (cont’d)

Bargraph

In fault capture and file capture mode, the bargraph indicates the position of the screen and cursors in the acquisition memory. The main cursor is positioned on the displayed fault and the auxiliary cursor on the right of the screen.

Movement towards the fault

immediately left of the

magnified screen

Movement towards the fault

immediately right of the

Settings

10:23:10

Signification of symbols appearing on the bargraph: The recorder is in fault capture or file capture mode. The horizontal zoom is active. The curves displayed are stored in the memory. Delayed start-up is activated. This symbol is displayed only when delayed start-up is active.

It indicates the time at which recording will commence. Start-up date: see §. Trigger Menu  Delayed start-up, p. 98.

Acquisition times

2. Control area

10:23:10

13:23:25 17:14:20

These represent the times of:

- the first sample viewed;

- the sample located under the main cursor;

- the sample located under the auxiliary cursor.

•

Parameters of each channel and trace:

- display

- coupling

- bandwidth limit,

- zoom function,

- vertical measurements of samples under the main and auxiliary cursor.

• Indication and active adjustment of the last selected element:

- trigger level (main and auxiliary),

- horizontal gap between the time position of the auxiliary cursor and that of the main cursor,

- vertical gap between the measurement of the auxiliary cursor and the main cursor on the reference trace (see §. Menu Measurement  Reference p. 105),

- number of faults acquired and number of fault viewed,

- duration of recording and acquisition interval.



The time position of the trigger is not displayed as it is fixed (20 % of the memory). The horizontal scale is not displayed.

VI - 90 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

• The device indicates if the acquisition is in RUN or HOLD mode.

• The other displays (battery, etc.) are identical to “Oscilloscope” mode.

Recorder Mode - Display

the following measurement

Recorder Mode (cont’d)

2. Control area (cont’d)

Measurement of sample under auxiliary cursor

Measurement of sample under main cursor

Symbol is a reminder that is that of the auxiliary

cursor (solid line)

Symbol is a reminder that is that of the main cursor

(broken line)

• The use of controls,

• the validation of channels with the mouse,

• the menus relating to the channels and functions

are identical in “Recorder” and “Oscilloscope” mode.



It is not possible to mix memorised curves (Mx) and acquired curves in real-time Chx on the display (see §. Memory Menu “.REC” p. 107).

The colour corresponds to the colour of the trace.

Display of trace parameters:

- validity

- DC coupling

- bandwidth limitation

- vertical measurement of sample under cursors

- display of ZOOM mode

Display of maths function parameters:

- validity

- vertical measurements

Display of memories:

- validity

- vertical measurements

Indication, adjustment and trigger level (sensitivity) of last setting selected

(



E.g. vertical and

horizontal gap between the main and auxiliary cursor)



Trace



Recall

Two-channel digital oscilloscopes, 60 MHz and 100 MHz VI - 91

Recorder Mode - Display

Recorder Mode (cont’d)

3. Display area

Graphic elements displayed associated with the traces in this area:

•

Vertical position indicator for the reference level of each trace

•

ZOOM area selection.

•

Main cursor (permanent, moved using mouse) located at the left of the screen by default.

•

Auxiliary cursor (permanent, moved using mouse) located at the right of the screen by default.

•

Trigger time position indicator (fixed and located 20% across from the left of the screen). Its graphical representation is as follows :

Level indicators representing 5 different triggers:

- “Lower trigger” option (of the last channel selected).

- “Upper trigger” option (of the last channel selected).

- “Upper/lower trigger” option (of the last channel selected).



The level indicator figure represents the channel concerned by this

indicator:



Example



In fault capture and file capture mode, the grid is divided into ten

sections; i.e. one section for each fault.

The cursors are no longer displayed: they reappear when a single fault is displayed on the screen (horizontal zoom enabled: see help for key shown here).

- “External window trigger” option (of the last channel selected).

- No symbol is displayed: no trigger (on the last channel selected).

- Lower trigger option on channel 1. There can be trigger conditions on several

channels at the same time: display by selecting the channel concerned.

VI - 92 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Recorder Mode - Display

Recorder Mode (cont’d)

Display elements

Definition of display

Items Display elements

1 2

Trace displayed

3 4 5 6 7

8 9

Trace displayed Indication of vertical position of reference level of the displayed

trace and identification of trace number Indicator of trace outside display window Graticule division Zoom area selection Main measuring cursor

Trigger level position outside window indicator Auxiliary measuring cursor

Trigger level position indicator (here, for example: upper/lower trigger)

Trigger time position indicator  fixed at 20%

Two-channel digital oscilloscopes, 60 MHz and 100 MHz VI - 93

Recorder Mode - Display

Fault 5 is displayed in full screen mode and has

Recorder Mode (cont’d)

Menu accessible

from display area

Zoom creation in

Fault Capture mode

Case 1

Like in “Oscilloscope” mode, the menu concerning the display can be opened directly by clicking with the right key of the mouse in the display area.

This menu, as well as the functions of the proposed options, are identical to those in “Oscilloscope” mode.

Draw a rectangle around the part you wish to zoom in on with the left key of the mouse. The screen displays, with a vertical zoom, the fault on which you began the rectangle.

been vertically magnified

Fault 5 is

magnified.

To return to a normal display (10 faults displayed on the screen), select “Disable zoom” in the menu,



Disabling the horizontal zoom with the zoom key allows the user to return to a screen displaying the ten faults, but the vertical zoom remains enabled.

VI - 94 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Recorder Mode - Display

A zoom frame is

Recorder Mode (cont’d)

Case 2

The horizontal zoom is enabled, the screen displays the captured fault which has been selected :

drawn.

On the displayed fault, it is possible to vertically zoom delimitating a zone with the mouse.

Fault capture mode: the horizontal zoom is enabled.

A single fault is displayed on the screen.

As in the first case, select “disable zoom” in the menu above to disable the zoom. The screen returns to the initial “10 faults on the screen” display.



Disabling the horizontal zoom with the zoom key allows the user to return to a screen displaying the ten faults, but the vertical zoom remains enabled.

A vertical zoom is applied to the area

containing the fault.

Two-channel digital oscilloscopes, 60 MHz and 100 MHz VI - 95

Recorder Mode (cont’d)

)

Recorder Mode - « Vertical » Menu

The "VERT" Menu

(∗ (∗ (∗ (∗)

This menu is identical to that described in “Oscilloscope” mode.

(∗∗)

(∗) Functions only accessible in

"Advanced" mode.

(∗∗) The DC coupling is the only

option in “Recorder” mode.

See §. Description, p. 65.

V - 96 Two-channel digital oscilloscopes, 60 MHz or 100 MHz

Recorder Mode - “Trigger” Menu

triggering

division

hysteresis is

applied to prevent

Recorder Mode (cont’d)

The "TRIG" Menu

Triggering

Selection of trigger type and level on each channel. Triggering takes place if a condition described by a line of the “Trigger” table is verified. This trigger level must be present in the display area.

Source Level 1 Level 2

Trigger type

The Pretrig is monitored for each type of trigger.

Indicates the channel number. The main trigger threshold level can be set using the mouse. The auxiliary trigger threshold level can be set using the mouse. This tab is

enabled only if external trigger type is selected.

Trigger levels are entered into the current value display area after modification.



Fine adjustment is possible. This tab indicates each channel’s trigger type. Recorder mode enables several

conditions to be monitored at the same time.

“No trigger”: if all the channels are in this mode, the device records indefinitely.

•

“Lower than”: triggering takes place when the signal drops below the threshold.

•

“Lower/higher than”: triggering takes place when the signal drops below or rises above the threshold.

•

“Higher than”: triggering takes

threshold

higher

triggering

place when the signal rises above the threshold.

threshold

triggering

lower

higher



ill-timed triggers.

Two-channel digital oscilloscopes, 60 MHz or 100 MHz VI - 97

A half-

•

“Outside window”: triggering takes place when the signal goes outside the window defined by the two thresholds.

thresholds

triggering:

the signal goes

outside the

window

Recorder Mode (cont’d)

Recorder Mode - “Trigger” Menu



Start deferred

Authorised on

Example

- Channel 1 is set with a 1.36V “higher than” trigger.

- Math 3 and 4 do not wait for a trigger.

- Channel 2 is set with an “outside” type trigger.

- Channel 1 and 2 lines are highlighted: they wait for a trigger.

Outside trigger symbol for channel 2

Toggle through the trigger conditions for the different channels

Deferred start offers the possibility of starting up an acquisition at a date and time chosen by the user.

This option can be related to the previous trigger conditions. This tab allows the user to validate – or not – delayed triggering.

• If the symbol “” is displayed, delayed triggering has been validated.

• If there is no symbol, delayed triggering has not been validated.

Use the mouse to validate or unvalidate the tab.

• When deferred start has been validated, the user can no longer make an



acquisition in recorder mode. He/she may, however, use the other modes (oscilloscope, analyser) as desired. If the user wishes to make an acquisition in recorder mode, he/she must:

- either unvalidate delayed start-up,

- or wait until the delayed start-up acquisition begins.

using the keys shown opposite.

• At the time the acquisition is set to start (deferred start time), the instrument

must be in operation and the user must have enabled recorder mode.

Date/Time



Example

Different scroll boxes allow the user to set the date and time he/she wishes the acquisition to commence.

Use the mouse to scroll.

Deferred start: the acquisition will commence on 26 January 2005 at 17:44. The red clock symbol shows the user that delayed start-up is enabled.

Deferred start-up symbol and time

VI - 98 Two-channel digital oscilloscopes, 60 MHz and 100 MHz

Recorder Mode - “Trigger” Menu

Recorder Mode (cont’d)

Fault capture



Example

The fault capture mode allows 100 recordings of 500 samples to be made around the trigger point.

These 10 recordings will be displayed on the screen. Each recording is separated by a solid vertical line. They are recorded in volatile memory.

The fault capture mode is selected:

the screen is divided into 10 sections.

Display after an acquisition in fault

capture mode

File capture

This mode is similar to fault capture mode:

It carries out several series of 100 recordings of 500 samples.

Each series of 100 recordings is stored in a file in the memory (.REC).

- The number of total recordings that may be made depends on the space remaining in the memory.



If the memory is empty, it is possible to make up to 300 recordings of 500 samples (200 recordings saved in a file and 100 recordings in volatile memory), totalling over 100,000 samples.

Two-channel digital oscilloscopes, 60 MHz or 100 MHz VI - 99

Recorder Mode (cont’d)

Recorder Mode - “Trigger” Menu

File capture (cont’d)



Example

•

When the memory is full, the acquisition is stopped and a message appears on the screen “Write error/Auxiliary storage full!”. The message is validated by selecting OK with the mouse. The user can then begin to study the recordings.

•

They are displayed folder by folder. There is a file on the screen. A file contains 100 recordings. Fault capture option display mode is available.

•

Use the Fault window to move from file to file (see §. Display Menu).

The acquisition can be interrupted at any time by pressing the RUN/STOP key. The user can then study previously recorded faults.

File capture until the memory is full:

File capture acquisition is launched. When 100 faults are captured, a file is created with these 100 recordings.

The memory is full: the acquisition is stopped and a message is displayed.

Final stage: Message validation. In order to access all the recorded faults, go to Display menu  Fault. See Display Menu §. Faults.

VI - 100 Two-channel digital oscilloscopes, 60 MHz and 100 MHz

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

Specifications and Main Features

Frequently Asked Questions

User Manual