User Manual
ScopiX IV
OX 9062
OX 9102
OX 9104
OX 9304
DIGITAL OSCILLOSCOPES
- 60MHz, 2 isolat
- 100MHz, 2 isolated channels
- 100MHz, 4 isolated channels
- 300MHz, 4 isolated channels
ed channels
2
Thank you for purchasing a ScopiX IV digital oscilloscope with isolated channels.
and reuse.
For best results from your instrument:
Read this user manual carefully
Observe the precautions for use
WARNING, risk of DANGER! Refer to these
instructions whenever this danger symbol appears.
Indoor use.
Instrument entirely protected by double insulation. Earth terminal.
Chauvin Arnoux has adopted an Eco-Design
approach in designing this instrument. Analysis of
the complete lifecycle has enabled us to control and
optimize the effects of the product on the
environment. In particular this instrument exceeds
regulation requirements with respect to recycling
The product is declared recyclable following an
analysis of the life cycle in accordance with
standard ISO 14040.
The CE marking indicates conformity with
European directives, in particular LVD and EMC.
Definition of measurement categories:
Measurement category IV corresponds to measurements taken at the source of low-voltage installations.
Example: power feeders, counters and protection devices.
In the European Union, this product is subject to
selective collection and recycling at end-of-life as
waste electric and electronic equipment under
directive 2002/96/EC (WEEE): this equipment
must not be treated as an ordinary household
waste. Spent batteries must not be treated as
ordinary household waste. Take them to the
appropriate collection point for recycling.
Risk of electric shocks: instructions for connecting
and disconnecting the inputs. Always connect the
probes or adapters to the instrument before
connecting them to the measurement points.
Always disconnect the probes or leads from the
measurement points before disconnecting them
from the instrument. These instructions apply
before cleaning the instrument and before
opening the cover on the battery compartment
and the probe calibration outputs.
Application or withdrawal not authorized on
conductors carrying dangerous voltages. Type B
current sensor as per EN 61010-2-032.
Measurement category III corresponds to measurements on building installations.
Example: distribution panel, circuit-breakers, machines or fixed industrial devices.
Measurement category II corresponds to measurements taken on circuits directly connected to low-voltage installations.
Example: power supply to electro-domestic devices and portable tools.
PRECAUTIONS FOR USE
This instrument and its accessories comply with safety standards EN61010-1, EN61010-031, and EN61010-2-032, at voltages
that depend on the accessories (600V CAT III with respect to earth whatever the accessory) at an altitude of less than 6500’
(2,000m), indoors, with a degree of pollution ≤2.
Failure to observe the safety instructions may result in electric shock, fire, explosion, and destruction of the instrument and of
the installations.
The operator and/or the responsible authority must carefully read and clearly understand the various precautions to be
taken in use. Sound knowledge and a keen awareness of electrical hazards are essential when using this instrument.
If you use this instrument other than as specified, the protection it provides may be compromised, thereby endangering
you.
Do not use your instrument on networks of which the voltage or category exceeds those stated.
Do not use the instrument if it seems to be damaged, incomplete, or poorly close.
Before each use, check the condition of the insulation on the leads, housing, and accessories. Any item of which the
insulation is deteriorated (even partially) must be set aside for repair or scrapping.
Use only the leads and accessories supplied. The use of leads (or accessories) of a lower voltage rating or category
limits the use of the combined instrument + leads (or accessories) to the lowest category and service voltage.
Use personal protection equipment systematically.
When handling the leads, test probes, and crocodile clips, keep your fingers behind the physical guard.
All troubleshooting and metrological checks must be done by competent, accredited personnel.
3
CONTENTS
1. GENERAL................................................................ 4
1.1. Introduction ....................................................... 4
1.2. Delivery condition ............................................ 4
Unpacking, re-packing ........................................ 4
1.2.1.
1.2.2. Supply ................................................................ 4
1.3. Accessories ...................................................... 5
1.4. Battery and power supply ................................ 6
LITHIUM-ION battery .......................................... 7
1.4.1.
1.4.2. Charging the battery ........................................... 7
1.5. Isolation of the channels.................................. 8
1.6. Probix accessories ........................................... 9
1.6.1. Probixt ................................................................ 9
1.6.2. Rapid, error-free measurements ......................... 9
1.6.3. Auto scale ......................................................... 10
1.6.4. Safety message ................................................ 10
1.6.5. Power supply to the accessories ...................... 10
2. DESCRIPTION ....................................................... 11
2.1. Front panel ...................................................... 11
2.2. Rear panel ....................................................... 11
2.3. Touch screen and stylus................................ 12
2.4. Accessories .................................................... 13
2.5. Communication interfaces............................. 15
3. GETTING STARTED ............................................. 16
3.1 General principles .......................................... 16
3.2 ON/OFF key ..................................................... 16
3.3 Screenshot key ............................................... 16
3.4 Full Screen key ............................................... 16
3.5 HOME key and icon ........................................ 17
3.6 Brightness key ................................................ 17
4. OX 9304 FUNCTIONAL DESCRIPTION ............... 18
4.1 SCOPE mode ................................................. 18
4.1.1 Keys/ active keypad .......................................... 18
4.1.2 Reference Memory adjustment......................... 18
4.1.3 AUTOSET adjustment "Magic Wand" key .... 18
4.1.4 MEASURE adjustment ..................................... 19
4.1.5 HORIZONTAL time base adjustment ............... 19
4.1.6 VERTICAL signal ampitude adjustment ........... 24
4.1.7. TRIGGER adjustment ....................................... 26
MATHEMATICAL function (from screen) .......... 31
4.1.8.
4.1.9. AUTOMATIC measurements (from screen)...... 32
4.1.10. Backup ............................................................. 33
4.2 Multimeter mode ............................................ 34
4.2.1
Keys/keyboard active in Multimeter mode ........ 34
4.2.2 Icon/screen of the Multimeter mode ................. 35
4.2.3 Adjustments of the VERTICAL menu ............... 36
4.2.4. Power measurement ........................................ 37
4.3 LOGGER mode .............................................. 38
4.3.1
Keys/keyboard active in LOGGER mode ......... 38
4.3.2 Icons/screen in LOGGER mode ....................... 39
4.3.3 Principles .......................................................... 39
4.4 VIEWER mode ................................................ 40
4.5 HARMONIC mode .......................................... 43
4.5.1. Keys/keyboard active in Harmonic mode ......... 43
4.5.2. Principle ............................................................ 43
4.5.3. Icons/screen in Harmonic mode ....................... 44
4.6. Communication .............................................. 45
4.6.1 General parameters .......................................... 46
4.7. Memory ............................................................ 48
4.8 Firmware Update ............................................ 49
4.9. ScopeNet IV..................................................... 50
5. WAVEFORMS DISPLAY ........................................ 52
5.1 Manual display................................................. 52
5.1.1. Using the keypad............................................... 52
5.1.2. Using the touch screen ...................................... 53
5.2 Autoset ............................................................. 53
5.3 Calibrating the probes .................................... 54
5.4 Auto/Cursors/Zoom measurement ................ 56
5.4.1. Auto ................................................................... 56
5.4.2. Cursors .............................................................. 57
5.4.3. Zoom ................................................................. 57
5.5 Adjusting the Trigger ...................................... 58
5.6 Mathematical/FFT/XY measurement .............. 58
6. MULTIMETER MEASUREMENTS ......................... 60
6.1 Differentiating channels ................................. 60
6.2 Measurement type ........................................... 60
6.3 Power measurement ....................................... 61
6.4 LOGGER mode ............................................... 62
7. HARMONICS ANALYSIS ....................................... 63
8. TECHNICAL SPECIFICATIONS ............................ 64
8.1. Oscilloscope function ..................................... 64
8.2 Multimeter and LOGGER function ................. 70
3 VIEWER function ............................................. 72
8.
8.4 HARMONIC ANALYSIS function .................... 73
8.5. Communication ............................................... 74
8.5.1. Communication port and peripherals ................. 74
8.5.2. Applications ....................................................... 74
9. GENERAL SPECIFICATIONS ............................... 75
9.1. Nominal range of use ...................................... 75
Environmental conditions .................................. 75
9.1.1.
9.1.2. Variations in the nominal range of use .............. 75
9.1.3. Power supply ..................................................... 75
9.2. Mechanical specifications .............................. 76
9.2.1. Case covered with elastomer ............................ 76
9.2.2. Mechanical conditions ....................................... 76
9.3. Electrical specifications ................................. 76
9.3.1.
Battery power supply ......................................... 76
9.3.2. Line power ......................................................... 77
9.4. CEM and safety................................................ 77
Electromagnetic compatibility ............................ 77
9.4.1.
9.4.2. Electrical safety ................................................. 77
9.4.3. Temperature ...................................................... 78
10. MAINTENANCE ..................................................... 79
10.1. Warranty ........................................................... 79
10.2. Cleaning ........................................................... 79
10.3. Repair and metrological verification ............. 79
4
1. GENERAL
OX 9062 (Cat #2150.31)
digital
color
2 isolated channels
60MHz
scale 2.5GS/s
OX 9104 (Cat #2150.33)
4 isolated channels
OX 9062
(2150.31)
OX 9102
(2150.32)
OX 9104
(2150.33)
OX 9304
(2150.34)
Set of 2, 5 ft. color-coded leads, test
probes & alligator clips
Probe tips 4mm in diameter
1 1 1
1
(2136.80)
10 ft USB cable
1 1 1
1
HX0179*
µSD memory card, HC, 8GB + SD
1 1 1
1
HX0033
(2124.76)
HX0130
(2157.02)
(2157.06)
HX0122
(5000.87)
Replacement power adapter PA40W-2 for
Power cord 110V (Razor Plug) for OX III
1.1. Introduction
Your oscilloscope belongs to the ScopiX line of instruments; this user manual describes the operation of an OX 9304:
General
OX 9102 (Cat #2150.32)
OX 9304 (Cat #2150.34)
digital color
digital
digital
color
color
2 isolated channels
4 isolated channels
100MHz scale 2.5GS/s
100MHz scale 2.5GS/s
300MHz scale 2.5GS/s
These instruments provide the following functional modes:
oscilloscope
multimeter
logger
harmonic analyzer
The interface is user-friendly: simple, compact, and practical. The Probix accessories ensure safety and speed, because
they are recognized automatically when connected. The means of communication and storage are optimized.
1.2. Delivery condition
1.2.1. Unpacking, re-packing
The mechanical and electrical condition of the instrument was checked before shipment. When you receive it, perform a
quick check for damage that may have occurred in transit. Should there be any, contact our sales department immediately
and inform the carrier. For reshipping, we suggest using the original packaging.
1.2.2. Supply
Reference
(Cat #)
Designation
2x60MHz
2x100MHz
4x100MHz
4x300MHz
(2152.05)
PROBIX Banana Plug (4mm) Adapter 1 1 1 1
1/10 500MHz probe, 300V CAT III 4
HX0030C
HX0120
(5000.86)
HX0121
(5000.17)
(2960.47) LI-ION 5.8 Ah battery pack 1 1 1 1
(5000.85)
(5000.22)
1/10 250MHz probe 600V CAT III 2 2 4
METRIX carrying case 1 1 1 1
Set of 5, replacement stylus pen 1 1 1 1
Carrying strap 1 1 1 1
OX9000 series
% IV oscilloscopes
1 1 1 1
1 1 1 1
1 1 1 1
*Replacement µSD cards can be purchased at most retail electronics outlets.
General
5
Range of use
measurement
50Ω
1.3. Accessories
Reference
(Cat #)
HX0130
(2157.02)
HX0030C
(2124.73)
HX0031
(2124.74)
HX0032
(2124.75)
HX0033
(2124.76)
HX0093
(2157.01)
Probe
BNC
adapter
Banana
adapter
Terminations
Current
Clamp
sensor
Amp
FLEX
Mini Amp
FLEX
SK1-20
SK1-19
sensors
SP10-13
sensors
300V
CAT III
500MHz
600V
CAT III
250MHz
300V
CAT III
250MHz
30V
250MHz
300V
CAT III
600V
CAT III
Filter
300Hz
of
Types
Voltage
Voltage
Voltage
Voltage
Voltage
Resistance
Capacitance
Diode tester
Voltage
HX0034B
(2124.77)
HX0072
(2124.91)
HX0073
(2124.92)
HX0094
(2157.03)
HX0096
(2157.04)
HX0035B
(2124.78)
HX0036
(2157.05)
0.2-60Arms
1MHz
AC/DC
5-3000A
200kHz
AC
1-300Arms
3MHz
AC
4-20mA %
100mV/A Courant
from 14 to
2282°F
(-10° to
+1250°C)
from 212 to
932°F
(100
to 500°C)
rms
Current
Current
Current
Temp.
thermocouple
Temp.
Probe
PT-100
K
6
1.4. Battery and power supply
4. Insert the new pack in the compartment and press it firmly in place.
The instrument is powered by a rechargeable 10.8V, Lithium-Ion battery pack. Fully charge the battery before first use.
Charging must be performed between 32 to 113°F (0 to 45°C).
General
AC supply
battery
1. Using a screwdriver: 2. Withdraw the battery pack:
3. In the compartment, remove the
protective plastic film before the first use:
4. Put the battery pack back in place.
Replacing
the battery
Replacement procedure 1. Disconnect all leads, probes, etc. from the instrument and turn it OFF.
The instrument battery includes specific protection and safety elements. Replacement of
the battery by a product other than the one specified may cause material damage and
bodily injury by explosion or fire.
2. Turn the instrument over and insert a screwdriver in the slot in the battery pack.
3. Push the screwdriver towards the rear; the battery will be pushed out of its compartment.
In the absence of the battery, the internal clock of the instrument continues to operate for
at least 60 minutes.
To ensure safety, replace the battery only by the original model. Do not use a battery
with a damaged package.
General
7
and cadmium
ScopiX
1.4.1. LITHIUM-ION battery
on battery
Li-i
advantages
1.4.2. Charging the battery
Long life between charges with limited bulk and weight
No memory effect: you can recharge the battery even if it is not fully discharged without
reducing its capacity
Very low self-discharge
Rapid recharging
Protection of the environment, ensured by the absence of polluting materials such as lead
Before first use, fully charge the battery. Perform the
charging between 32 and 113°F (0 and 45°C). The
instrument is designed to operate with the charger
connected. The charger includes two elements: a power
supply and a charger. The charger simultaneously
manages the charging current, the battery voltage, and the
battery's internal temperature. This optimizes charging
while ensuring long battery life.
Before using instrument,
check its charge level
To extend battery life:
Battery dock
External Li-Ion charging
support
P01102130 + label
Display, in each mode, of the
5 charge levels of the battery
Charger LED orange and blinking: no battery or battery being charged. The LED
appears green at the end of charging.
Battery level indicator displays fewer than three bars: start charging the instrument.
Charging typically takes about five hours. After prolonged storage, the battery may be
completely discharged. In this case, the first charge may take longer. If the instrument is
not likely to be used for more than two months, remove the battery. To maintain its
capacity, recharge it every 4 to 6 months.
Only use the charger provided with your instrument. Using another charger may be
dangerous!
Charge your instrument only between 32 and 113°F (0 and 45°C).
Observe the conditions of use and storage stated in this user manual.
If the instrument will not be used for an extended period, remove the battery and store it
at room temperature.
The charger is common to several Chauvin Arnoux instruments; the label of the PA40W2 power supply bears the CHAUVIN ARNOUX logo.
This PA40W-2 charger is compatible with the ScopiX. A set of labels is provided, for
“personalizing”
Depleted batteries must not be treated as household wastes. Take them to the
appropriate collection point for recycling.
accessories.
8
1.5. Isolation of the channels
ScopiX has 2 or 4 channels that are isolated from each other and from earth (600V CAT III):
ScopiX electrical dagram:
General
Frame grounds
isolation
Making measurements in systems where the circuits may be at different potentials can be
very dangerous, due to short-circuits via the instrument or from the potentials themselves.
The digital isolation of the grounds uses the same input terminals and acquisition systems
for the oscilloscope and multimeter modes, making it possible to change from one
instrument to the other without changing the measurement connection.
Since the 3 channels are isolated from each other, you can safely set up one or two
channels with a voltage-to-ground output and the other channel(s) with low current or
voltage input.
Probix accessories provide continuous information about the limits of the instrument
(insulation voltage, rated maximum voltage).
General
9
1.6. Probix accessories
1.6.1. Probix
ScopiX uses Probix intelligent probes and sensors,
which are recognized automatically when connected. When
a probe or sensor is connected to the oscilloscope, a safety
message about the probe/sensor indicates:
maximum input voltage as a function of the category
maximum voltage with respect to earth as a function
of the category
maximum voltage between channels as a function
of the category
sensor/probe type
elementary specifications
suitable safety leads
For the safety of both you and the instrument, read and carefully follow this information.
The trace color of the signal measured with a given accessory is set in the menu: "Green" "chX" "Probix". An
interchangeable elastic or plastic ring is used to associate the color of the probe and the color of the trace. Scaling and units
are configured automatically by the Probix system, allowing rapid measurements with no risk of error.
1.6.2. Rapid, error-free measurements
The Probix system ensures rapid and error-free setting up of the instrument, which is essential for instruments used for
troubleshooting. Standard BNC accessories and banana cables can be connected using the safety adapters provided. An
interchangeable plastic ring is used to match the color of the accessory to its channel. The power supply for the sensors is
provided by the oscilloscope.
(1) (2) (3)
Display of the:
max. input voltage (1) with respect to earth
floating voltage (2)
voltage between channels (3)
according to the installation category, the type or reference of
the sensor, and a designation of the main characteristics.
floating between channels with respect to earth
(2) (3) (1)
10
1.6.3. Auto scale
A B
RF compensation
Some Probix probes have buttons with programmable settings:
o
1.6.4. Safety message
The HX0030 probe has three directly accessible control buttons:
Button A (programmable) modifies settings for the
connected channel
Button B (programmable) modifies settings for the
connected channel
Button controls the backlighting of the measurement
zone
At the time of connection, all preferred settings stored in the
accessories (assignments of buttons A and B + color) are
automatically reactivated. They can be modified by pressing the
zone shown in the illustration to the left.
Configuring channels and managing sensors
The coefficients, scales, and units of the sensors and the
configurations of the channels are managed automatically.
General
Accessory
identification
and safety
management
1.6.5. Power supply to the accessories
The oscilloscope supplies power to the Probix accessories.
Probes and sensors are automatically recognized when connected. The instrument identifies the
probe/sensor and provides information about its characteristics. This helps ensure safety.
Description
11
Hard enclosure covered with
elastomer, rated to IP54.
Probix terminal
block
Stylus for touch screen use
Color screen
Display of the applied signals,
adjustment
The main command
functions can be modified by
using the
Silicone keypad
The screen is divided into
channels.
Power supply
Li-Ion battery pack, 10.8V
Battery charger port
Stand (shown in closed position)
2.1. Front panel
2. DESCRIPTION
accompanied by all
parameters.
the touch screen
stylus provided.
Icons provide easy function selection.
functional zones: display of the
zoom simultaneous with waveform,
automatic measurements and
cursors, FFT function with timedomain signal.
Each channel and its parameters
are identified by an identical color
on a black ground for better
visibility.
The colors are optimized to identify
30 keys provide direct
access to the main commands.
2.2. Rear panel
Safety markings
"Use only the probes and leads
specified in the operating manual.
The insulation level varies according to
the probes and accessories used.
Refer to the operating manual and the
safety information on screen.
Disconnect the leads, the probes, and
the power supply before replacing the
battery."
12
2.3. Touch screen and stylus
Display
The screen:
- touch-operated
- color
- water- and dust-resistant
- responds to any form of pressure by any pointing resource, such as a stylus or bare or
gloved hand
Intuitive icons for ease of use.
Each channel and its parameters are identified by matching color on a black ground for
better legibility.
Colors are optimized to facilitate channel identification.
Screen is partitioned according to the functions selected:
- display of the zoom at the same time as the waveform
- automatic measurements and cursors
- FFT function and time-domain signal
Description
Color screen:
LCD WVGA
(800x480)
7 inch
TFT
resistive, color, touch operated (can be
used with protective gloves)
Backlighting by LEDs
Brightness adjustable by the keypad
Light sensor: automatically adjusts
brightness to accommodate ambient
light
Calibrating
the touch
screen
The touch screen can be calibrated from the home window by pressing the key.
Description
13
CLIC !
2.4. Accessories
HX0122 strap with
removable grip
Attaching the strap (length adjustable from 16.5 to 23.6” [42 to 60cm]) to the instrument:
1. Attach the strap:
2. Remove the strap:
Stand providing
an angle of 40°
Description
14
HX0120
carrying
case
The carrying/protection case includes:
waterproof all-terrain bottom
2 handles
shoulder strap
removable interior compartment with 3 storage areas:
- 1 central compartment with plasticized pouch for the ScopiX
- 2 side pockets with 2 adjustable self-adhesive separators for storing accessories
HX0121
stylus
The stylus is stored in the holder on the side of the instrument.
The stylus has an eyelet.
A nylon thread can be passed through it to secure the stylus to the
terminal block:
2 holes, with a thread guide between them, are provided for this
purpose.
Description
15
USB connector
RJ45 Ethernet
µSD card
Probe
2.5. Communication interfaces
Communication interfaces
Communication ports are grouped in a
dedicated compartment on the right side
of the oscilloscope and protected by a
removable cover.
Communication type
(USB
Type B, 12Mb/s)
Type B USB (peripheral) for communication with a PC
RJ45 Ethernet wired peripheral
WiFi (default state is inactive) for communication with a PC or with a network
printer
High-capacity µSD for data storage
The memory icon appears in one of three colors (refreshed every 5
minutes) to indicate the presence of the SD-Card and the amount space left on the
card or the internal memory.
The general configuration of the communication interfaces appears when you
select the icon. By default, the WiFi link is inactive.
Hard-wired ETHERNET LAN network (manual/automatic configuration)
WiFi to communicate with a PC or (in an Android environment) with a tablet or
smartphone
Type B USB to connect a PC and exchange files or control the instrument
connector
(10/100
BASE-T)
(SD, SDHC,
SDXC)
calibration
lugs
16
3. GETTING STARTED
3.1 General principles
Dialog boxes are displayed at the bottom of the screen. They do not overlap the graph display area, providing an
unobstructed view of the user's action on the channel. (Only adjustments related to the displayed graph remain
displayed.) However, in some cases a virtual keypad appears to enable entering alphanumeric content; this keypad
appears in the center of the screen and covers the graph display area.
The button at top right closes the currently open dialog box.
Changes to dialog box settings take effect immediately (no confirmation required).
Selecting displays the online Help (common to all modes). The Help explains the keys of the keypad: pressing
any key of the keypad displays the Help menu of the key pressed, without starting the function associated with the key.
The name and icon of the key are displayed above the explanation.
To exit Help, point the stylus to the Help window.
The operating mode is multilingual; screen shots in this manual are in English.
3.2 ON/OFF key
Getting Started
3.3 Screenshot key
Saves screen shots in the "Screenshot" folder.
Accessible in the following modes:
Files are named:
SCOPIX_date_hour-minute-second.png
in the internal memory or on the connected µSD
Card.
3.4 Full Screen key
Pressing this key turns ON the instrument (orange LED lights).
A short press switches the instrument to standby (orange LED blinks).
A long press saves the configuration and turns OFF the instrument.
oscilloscope
multimeter
logger
harmonic analyzer
Toggles the display mode between normal and "full
screen."
The screen is organized to provide optimal area for
displaying graphs.
Blanking:
menu bar
parameters of the time base traces
bargraph
from the home screen, this key allows calibration of
the touch screen.
Getting Started
17
Action
Result
(on the screen)
printing
GPL2, LGPL)
Click the "HOME"
3.5 HOME key and icon
Press the HOME
key on the keypad
Return to the home screen from a
measurement session.
Directly access the instrument's operating
modes:
- oscilloscope
- multimeter
- LOGGER
- harmonic analyzer
Access the internal file management system
and the SD-Card (a file contains a saved
object).
icon on the
screen
3.6 Brightness key
Access the system parameters:
set time and language
WiFi
network
Access the following information:
serial number of the instrument
hardware version
software version
texts of the licences of the various
embedded software modules (GPL,
Return to the home screen, at any time during your browsing.
Adjusts the brightness of the screen (LED backlighting):
min. level 0%
max. level 100%
You can adjust the brightness according to your exposure:
lower press "-"
higher press "+"
The available steps are 25%, 37%, 50%, 62%, 75%, 87%, 100%.
Note: Brightness adjusted automatically until the key is pressed
18
"Home"
ON/OFF key
Brightness
Full screen
Screen shot
Reference
Autoset
4.1 SCOPE mode
OX 9304 Functional Description
4. OX 9304 FUNCTIONAL DESCRIPTION
4.1.1 Keys/ active keypad
4.1.2 Reference Memory adjustment
Automatic
measurements
Reference
measurements
of the
Cursors
In oscilloscope mode, pressing this key freezes
the traces on the screen. The graph is displayed
in a darker shade of the channel color as a
reference to be compared to a new acquisition.
The reference memories are accompanied by
their reference numbers.
Pressing this key again erases reference
memories.
This memory is not saved and will be lost
when you exit Oscilloscope mode.
4.1.3 AUTOSET adjustment "Magic Wand" key
memory
Horizontal
time base
Zoom
Vertical
adjustments
Triggering
Automatic optimum adjustment of the AUTOSET of the channels to which a signal is applied.
The adjustments are:
coupling
vertical sensitivity
time base
slope
positions
triggering
The signal having the lowest frequency is used as triggering source.
If no trace is detected on the inputs, autoset is aborted.
A simultaneous press on + assigns the corresponding channel as triggering source.
OX 9304 Functional Description
19
4.1.4 MEASURE adjustment
Activates/deactivates window
that displays the 20 automatic
measurements of the reference
trace.
By default, cursors are
activated with automatic
measurements.
Activates the 20
automatic
measurements of the
4 traces with
displacement by
"scrolling".
Selects, from among displayed traces, the reference trace for automatic and manual
measurements. The reference channel is identified by a circle in the color of the channel in the CHx
or Fx zone.
Activates/deactivates display cursors used for manual measurements.
In automatic measurement mode, cursors cannot be deactivated.
The vertical and horizontal cursors can be moved on the touch pad via the stylus.
The measurements made in position T (period), "dt" (time difference between the two cursors), 1/dt
(difference as a frequency, in Hz) and "dv" (voltage difference between the 2 cursors) are reported
in the status area. A phase cursor Ph (in °) displays a value for the angle between T and the
reference.
4.1.5 HORIZONTAL time base adjustment
a) from the keypad
Increases/decreases the coefficient of the time base by successive presses (T/DIV).
After a Zoom, the "Z-Pos." adjustment modifies the position of the screen in the acquisition
memory (upper part of the screen).
Activates/ deactivates the horizontal
"Zoom" function
A waveform screen is displayed at the top
of the screen, with the zoomed portion in
the main display area.
By default, the zoom is around
samples at the center of the screen, but
the display area can be moved.
A display area can be zoomed by tracing
a rectangle around the area to be
enlarged using the stylus on the touch
pad.
The sensitivity values, time base, and
horizontal and vertical positions are
recalculated automatically.
20
b) from the screen
1. Y(t): time-based view
of a waveform
OX 9304 Functional Description
Click at top right in the screen, on the Time Base zone (see the image to the left).
Description below of the Y(t) - Y(f) - XY display modes
Settings from 1ns to 200s
No averaging
Averaging coeff. 2
Averaging coeff. 4
Averaging coeff. 16
Averaging coeff. 64
Vector A vector is plotted between samples.
Envelope The minimum and maximum observed at each horizontal position
The entire
acquisition
Increased time resolution of a trace for a periodic signal. When this option is checked, the
signal can be averaged.
For time bases finer than 100µs/div. (without active zoom mode), the signal displayed is
reconstituted from several acquisitions. The time resolution can be as fine as 40ps.
If the signal is not repetitive, do not use this option. The time resolution will then be
±1ns.
Note that if this choice is checked, signal reconstruction can take an extended time.
The following parameters influence this time:
time base
frequency of recurrence of the trigger
activity of the Averaging mode
During this reconstruction, the signal must be stable (amplitude, frequency, waveform). To
speed up the reconstruction following a change in the signal, stop the acquisition, then
restart: Stop/Run.
Selects a coefficient to calculate an average on the displayed
samples (for example to attenuate random noise in a signal).
For the averaging coefficient to be taken into account in the
representation of the signal, the "Repetitive signal" option must be
selected.
The calculation is performed using the following formula:
Pixel N = Sample*1/Averaging rate + Pixel N-1
(1-1/Averaging rate):
Sample Value of the new sample acquired at abscissa t
Pixel N Ordinate of the pixel at abscissa t on the screen,
at instant N
Pixel N-1 Ordinate of the pixel at abscissa t on the screen,
at instant N-1
on the screen are displayed. Use this mode to display a variation in
time or of amplitude, or a modulation.
The whole of the acquisition (100,000 samples) is displayed on the
screen and a vector is plotted between samples. Use this mode to
display all details of the acquisition. This function can be used on a
memory or on a graph already acquired.
OX 9304 Functional Description
21
2. Y(f) = FFT (Fast
Fourier Transform)
Displays extreme values of the signal, acquired between two samples of the acquisition
memory. This mode:
detects a false representation due to undersampling
displays short-duration events (Glitch, ≤2ns).
Whatever time base is used, with its corresponding sampling rate, events having a short
duration (Glitch, ≤2ns) are displayed.
ROLL: Automatic on time base > 100ms, single
In single-shot mode, if the time base exceeds 100ms/div, the new samples are displayed
as soon as they are acquired. In addition, ROLL mode is activated when acquisition
memory is full (scrolling of the trace from right to left on the screen).
In triggered mode, save/retrieve can be used to record acquisitions in .trc format to the
"Traces" directory. This lets you store several rare events in the file system and analyze
them later.
Fast Fourier Transform
calculation
The Fast Fourier Transform (FFT) is used to calculate the discrete representation of a
signal in the frequency domain from its discrete representation in the time domain. It is
calculated on 2500 points. It can be used in the following applications:
measure harmonics and distortion of a signal
analyse pulse response
search for a noise source in logical circuits
1
)
(
=
x
N
x (n): a sample in the time domain
X (k): a sample in the frequency domain
N: resolution of the FFT
n: time-domain index
k: frequency index
(n)
exp j
nk
N
[0 (1)]
OX 9304 Functional Description
22
Width of the main lobe
Max. amplitude of the
rectangular
0.88
-13
Hamming
1.30
-31
Hanning
1.44
-43
Blackman
1.64
-58
Flat top
3.72
-93
Rectangle
Hamming
Hanning
Blackman
Flat top
Before calculating the FFT, the oscilloscope weights the signal to be analyzed by a
window that acts as a bandpass filter. The choice of window type is essential to
distinguish the different spikes of a signal and make accurate measurements.
Time representation
gnal to be analyzed
of si
Weighting window
Weighted signal
Frequency representation of
the signal calculated by FFT
The total duration of the study interval results in a convolution in the frequency
domain of the signal with a function sinx/x.
This convolution modifies the graphic representation of the FFT because of the
c
haracteristic lateral lobes of the sinx/x function (unless the study interval contains
an integral number of periods).
Five weighting windows are available. The menus appear immediately when you
select FFT menu:
Type of window
at 3dB down (bin)
secondary lobe (dB)
Effects of undersampling on the frequency representation:
If the sampling frequency is too low (less than twice the cutoff frequency of the
signal to be measured), the high-frequency components are undersampled and are
“aliased” (frequency-shifted) in the graphic representation of the FFT.
The Autoset function is active. It avoids the undersampling issue and adapts the
horizontal scale to make results easier to view.
The Zoom function is active. The zoom affects the graphic representation of the FFT
but does not change the conditions of acquisition (TB + depth).
OX 9304 Functional Description
23
3. XY
Horizontal unit: This is displayed in place of the time base and is calculated from the
sweep coefficient:
Unit in
Vertical unit: The sub-menus provide two possibilities:
a) Linear scale: by selecting the FFT menu, then linear scale
in (V/div) =
b) Log scale: by selecting the FFT menu, then log (logarithmic) scale
dB/div. = by assigning 0dB to a signal of 1 RMS amplitude division in the time
representation
The vertical position indicator of the representation is at –40dB.
Hz
(
) =
div
unit of the signal in its time-domain representation (V/div)
12.5
Sweep coefficient
2
Assign signals to the horizontal (X) and vertical (Y) axes.
Selected via "+/-".
Each axis is graduated in 8 divisions.
No, 2, 4, 16, 64
Vector, Envelope, Entire acquisition
Settings from 1ns to 200s
Increases the time resolution of a trace for a periodic signal
24
4.1.6 Adjustment of the amplitude of the "VERTICAL" signal
It takes into account the parameters of the "Vertical scale" menu.
a) from the keypad
Select channel
Activate channel
De-activate channel
Adjust the vertical sensitivity of the last channel selected:
Increase the vertical sensitivity
Decrease the vertical sensitivity
The sensitivity is displayed in the parameter display area of the channel.
Adjusts position of the selected graph on the screen:
Move up
Move down
OX 9304 Functional Description
Select, by successive presses on the input coupling, "AC", "DC" or "GND" of the last channel
selected
Modification of the coupling AC - DC - GND:
Activates or deactivates the horizontal
division by 4 of the display zone.
Activation of the "Full Trace" function is
indicated by:
After this function is activated, traces can
be moved vertically in their zones.
AC blocks the DC component of the input signal, attenuates signals below 10Hz.
DC transmits the DC and AC components of the input signal.
GND the instrument internally connects the input of the selected channel to a reference
level of 0V.
continuous horizontal line between
the display zones
horizontal division of the graticule
by 2
Loading...