multicomp pro MP720012 User manual

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Smart Digital Storage Oscilloscope
Model MP720012

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Table of Contents
1. General Safety Requirements.......................................................................................... 1
2. Safety Terms and Symbols............................................................................................... 2
3. General Characteristics................................................................................................... 4
4. Junior User Guidebook ......................................................Error! Bookmark not defined.
Introduction to the Structure of the Oscilloscope..................................................................... 6
Front Panel ...............................................................................................................................................6
Right Side Panel.......................................................................................................................................7
Rear Panel ................................................................................................................................................8
Control (key and rotary control) Area......................................................................................................9
User Interface Introduction......................................................................................................10
How to Implement the General Inspection ............................................................................. 12
How to Implement the Function Inspection............................................................................ 12
How to Implement the Probe Compensation..........................................................................13
How to Set the Probe Attenuation Coefficient........................................................................ 14
How to Use the Probe Safely..................................................................................................... 15
How to Implement Self-calibration.......................................................................................... 15
Introduction to the Vertical System......................................................................................... 15
Introduction to the Horizontal System....................................................................................17
Introduction to the Trigger System ......................................................................................... 17
5. Advanced User Guidebook ............................................................................................ 19
How to Set the Vertical System................................................................................................20
Use Mathematical Manipulation Function .............................................................................................26
Using FFT function................................................................................................................................28
Digital Filter (Only for some models)....................................................................................................32
Use VERTICAL POSITION and VOLTS/DIV Rotary controls.......................................... 32
How to Set the Horizontal System ...........................................................................................33
How to Set the Trigger System.................................................................................................35
Single trigger..........................................................................................................................................36
Alternate trigger .....................................................................................................................................39
How to Operate the Function Menu........................................................................................43
How to Implement Sampling Setup .......................................................................................................43
How to Set the Display System..............................................................................................................45
How to Save and Recall a Waveform.....................................................................................................49
How to Cut and Recall a waveform .......................................................................................................56

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How to Record/Playback Waveforms ....................................................................................................58
How to Implement the Auxiliary System Function Setting....................................................................64
How to Measure Automatically..............................................................................................................69
How to Measure with Cursors................................................................................................................73
How to Use Autoscale............................................................................................................................78
How to Use Built-in Help.......................................................................................................................80
How to Use Executive Buttons...............................................................................................................80
6. Communication with PC............................................................................................... 82
Using USB Port.......................................................................................................................... 82
Using LAN Port......................................................................................................................... 83
Connect directly .....................................................................................................................................83
Connect through a router........................................................................................................................84
Using COM Port........................................................................................................................ 86
7. Demonstration ............................................................................................................... 87
Example 1: Measurement a Simple Signal.............................................................................. 87
Example 2: Gain of a Amplifier in a Metering Circuit.......................................................... 88
Example 3: Capturing a Single Signal.....................................................................................89
Example 4: Analyze the Details of a Signal.............................................................................91
Example 5: Application of X-Y Function................................................................................ 92
Example 6: Video Signal Trigger............................................................................................. 94
8. Troubleshooting............................................................................................................. 95
9. Technical Specifications................................................................................................ 96
General Technical Specifications.............................................................................................99
10. Appendix .................................................................................................................... 100
Appendix A: Enclosure........................................................................................................... 100
Appendix B: General Care and Cleaning .............................................................................100

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1. General Safety Requirements
Before use, please read the following safety precautions to avoid any possible bodily
injury and to prevent this product or any other connected products from damage. In
order to avoid any contingent danger, ensure this product is only used within the
range specified.
Only a qualified technician can implement the maintenance.
To avoid Fire or Personal Injury:
Connect the probe correctly. The grounding end of the probe corresponds to the
grounding phase. Please don't connect the grounding end to the positive phase.
Use Proper Power Cord. Use only the power cord supplied with the product and
certified to use in your country.
Connect or Disconnect Correctly. When the probe or test lead is connected to a
voltage source, please do not connect and disconnect the probe or test lead at random.
Product Grounded. This instrument is grounded through the power cord grounding
conductor. To avoid electric shock, the grounding conductor must be grounded. The
product must be grounded properly before any connection with its input or output
terminal.
When powered by AC power, it is not allowed to measure AC power source
directly, because the testing ground and power cord ground conductor are
connected together, otherwise, it will cause short circuit.
To avoid electric shock, there must be a ground wire connect between ground
and the ground port (on the back of product panel).
Check all Terminal Ratings. To avoid fire or shock hazard, check all ratings and
markers of this product. Refer to the user's manual for more information about ratings
before connecting to the instrument.
Do not operate without covers. Do not operate the instrument with covers or panels
removed.
Use Proper Fuse. Use only the specified type and rating fuse for this instrument.
Avoid exposed circuit. Do not touch exposed junctions and components when the
instrument is powered.
Do not operate if in any doubt. If you suspect damage occurs to the instrument, have
it inspected by qualified service personnel before further operations.
Use your Oscilloscope in a well-ventilated area. Make sure the instrument installed
with proper ventilation, refer to the user manual for more details.
Do not operate in wet conditions.
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry.

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2. Safety Terms and Symbols
Safety Terms
Terms in this manual. The following terms may appear in this manual:
Warning: Warning indicates the conditions or practices that could result in
injury or loss of life.
Caution: Caution indicates the conditions or practices that could result in
damage to this product or other property.
Terms on the product. The following terms may appear on this product:
Danger: It indicates an injury or hazard may immediately happen.
Warning: It indicates an injury or hazard may be accessible potentially.
Caution: It indicates a potential damage to the instrument or other property might occur.
Safety Symbols
Symbols on the product. The following symbol may appear on the product:
Hazardous Voltage
Refer to Manual
Protective Earth Terminal
Chassis Ground
Test Ground
To avoid body damage and prevent product and connected equipment damage, carefully
read the following safety information before using the test tool. This product can only be
used in the specified applications.
Warning:
The two channels of the oscilloscope are not electrically isolated. The channels should
adopt a common ground during measuring. To prevent short circuits, the 2 probe
grounds must not be connected to 2 different non-isolated DC levels.

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Warning:
The channels should adopt common basis during measuring. To prevent short
circuits, the 2 probe ground must not be connected to 2 different non-isolated DC
level.
The diagram of the oscilloscope ground wire connection:
Ground Clip
Signal Input
Oscilloscope Electrical OutletProbe
Power Cord
It is not allowed to measure AC power when the AC-powered oscilloscope is
connected to the AC-powered PC through the ports.
Warning:
To avoid fire or electrical shock, when the oscilloscope input signal
connected is more than 42 V peak (30 Vrms) or on circuits of more than
4800VA, please take note of below items:
Only use accessory insulated voltage probes and test lead.
Check the accessories such as probe before use and replace it if
there are any damages.
Remove probes, test leads and other accessories immediately after
use.
Remove USB cable which connects oscilloscope and computer.
Do not apply input voltages above the rating of the instrument
because the probe tip voltage will directly transmit to the
oscilloscope. Use with caution when the probe is set as 1:1.
Do not use exposed metal BNC or banana plug connectors.
Do not insert metal objects into connectors.

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3. General Characteristics
Bandwidth: 30 MHz –125 MHz;
Sample rate: 500 MS/s - 1 GS/s;
1 M record length (10 M optional);
8 inch high def TFT display;
Ultra-thin body;
Pass / Fail function;
Waveform record and replay function;
Add / Remove measure function and user-defined measurement menu;
VGA (optional), USB, LAN interface.

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4. Basic User Guides
This chapter deals with the following topics mainly:
Introduction to the structure of the oscilloscope
Introduction to the user interface
How to implement the general inspection
How to implement the function inspection
How to make a probe compensation
How to set the probe attenuation coefficient
How to use the probe safely
How to implement an auto-calibration
Introduction to the vertical system
Introduction to the horizontal system
Introduction to the trigger system

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Introduction to the Structure of the Oscilloscope
When you get a new-type oscilloscope, you should get acquainted with its front panel at
first and the digital storage oscilloscope is no exception. This chapter makes a simple
description of the operation and function of the front panel of the oscilloscope, enabling
you to be familiar with the use of the oscilloscope in the shortest time.
Front Panel
The oscilloscope offers a simple front panel with distinct functions to users for their
completing some basic operations, in which the rotary controls and function pushbuttons
are included. The rotary controls have the functions similar to other oscilloscopes. The 5
buttons (F1 - F5) in the column on the right side of the display screen or in the row under
the display screen (H1 - H5) are menu selection buttons, through which, you can set the
different options for the current menu. The other pushbuttons are function buttons,
through which, you can enter different function menus or obtain a specific function
application directly.
1 2 3
4
5
6
7
Figure 4-1 Front panel
1. Power on/off
2. Display area
3. Control (key and rotary control) area
4. Probe Compensation: Measurement signal(5 V/1 KHz) output
5. EXT Trigger Input
6. Signal Input Channel
7. Menu off

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Right Side Panel
1
2
3
4
5
Figure 4-2 Right side panel
1. USB Host port: It is used to transfer data when external USB equipment connects to
the oscilloscope regarded as "host device". For example: use this port to save waveform
file into USB flash disk.
2. USB Device port: It is used to transfer data when external USB equipment connects to
the oscilloscope regarded as "slave device". For example: to use this port when connect
PC to the oscilloscope by USB.
3. COM / VGA port (Optional): To connect the oscilloscope with external equipment as
serial port, or to connect the oscilloscope with a monitor or a projector as VGAoutput.
4. Trigger Out & Pass/Fail Out (MCX connector).
5. LAN port: the network port which can be used to connect with PC.

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Rear Panel
2
1
55
3
4
Figure 4-3 Rear Panel
1. Handle
2. Air vents
3. AC power input jack
4. Fuse
5. Feet (which can adjust the tilt angle of the oscilloscope)

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Control (key and rotary control) Area
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54
6 7 8
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Figure 4-4 Keys Overview
1. Menu option setting: H1 - H5
2. Menu option setting: F1 - F5
3. Menu off：turn off the menu
4. M rotary control (Multipurpose rotary control): when a ○ M symbol appears in the
menu, it indicates you can turn the M rotary control to select the menu or set the value.
You can press it to close the menu on the left.
5. Function key area: Total 12 keys
6. Vertical control area with 3 keys and 4 rotary controls.
"CH1 MENU" and "CH2 MENU" correspond to setting menu in CH1 and CH2,
"Math" key refer to math menu, the math menu consists of six kinds of operations,
including CH1-CH2, CH2-CH1, CH1+CH2, CH1*CH2, CH1/CH2 and FFT. Two
"VERTICAL POSITION" rotary control control the vertical position of CH1/CH2,
and two "VOLTS/DIV" rotary control control voltage scale of CH1, CH2.
7. Horizontal control area with 1 key and 2 rotary controls.
"HORIZONTAL POSITION" rotary control trigger position, "SEC/DIV" control time
base, "HORIZ MENU" key refer to horizontal system setting menu.
8. Trigger control area with 3 keys and 1 rotary control.
"TRIG LEVEL" rotary control is to adjust trigger voltage. Other 3 keys refer to
trigger system setting.

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User Interface Introduction
1 2 3
13
10
22
20
4 6 7 8
11
9
12
14
1516171819
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Figure 4-5 Illustrative Drawing of Display Interfaces (SDS5032E(V) shown)
1. Waveform DisplayArea.
2. The state of trigger, including:
Auto: Automatic mode and acquire waveform without triggering.
Trig: Trigger detected and acquire waveform.
Ready: Pre-triggered data captured and ready for a trigger.
Scan: Capture and display the waveform continuously.
Stop: Data acquisition stopped.
3. The purple T pointer indicates the horizontal position for the trigger.
4. The pointer indicates the trigger position in the internal memory.
5. The two yellow dotted lines indicate the size of the viewing expanded window.
6. It shows present triggering value and displays the site of present window in
internal memory.
7. It shows setting time (see "Config" on P64 ).
8. It indicates that there is a USB disk connecting with the oscilloscope.
9. The waveform of CH1.
10. The purple pointer shows the trigger level position for CH1.
11. The positions of two purple dotted line cursors measurements.
12. The waveform of CH2.

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13. The frequency of the trigger signal of CH1.
14. It indicates the current function menu.
15. Current trigger type:
Rising edge triggering
Falling edge triggering
Video line synchronous triggering
Video field synchronous triggering
The reading shows the trigger level value of the corresponding channel.
16. The reading shows the window time base value.
17. The reading shows the setting of main time base.
18. The readings show current sample rate and the record length.
19. It indicates the measured type and value of the corresponding channel. "F" means
frequency, "T" means cycle, "V" means the average value, "Vp" the peak-peak
value, "Vk" the root-mean-square value, "Ma" the maximum amplitude value,
"Mi" the minimum amplitude value, "Vt" the Voltage value of the waveform's flat
top value, "Vb" the Voltage value of the waveform's flat base, "Va" the amplitude
value, "Os" the overshoot value, "Ps" the Preshoot value, "RT" the rise time value,
"FT" the fall time value, "PW" the +width value, "NW" the -Width value, "+D"
the +Duty value, "-D" the -Duty value, "PD" the Delay A→B value, "ND" the
Delay A→B value, "TR" the Cycle RMS, "CR" the Cursor RMS, "WP" the
Duty cycle, and "RP" the Phase.
20. The readings indicate the corresponding Voltage Division and the Zero Point
positions of the channels.
The icon shows the coupling mode of the channel.
"—" indicates direct current coupling
"～" indicates AC coupling
" " indicates GND coupling
21. It is cursor measure window, showing the absolute values and the readings of the
two cursors.
22. The yellow pointer shows the grounding datum point (zero point position) of the
waveform of the CH2 channel. If the pointer is not displayed, it shows that this
channel is not opened.
23. The red pointer indicates the grounding datum point (zero point position) of the
waveform of the CH1 channel. If the pointer is not displayed, it shows that the
channel is not opened.

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How to Implement the General Inspection
After you get a new oscilloscope, it is recommended that you should make a check on
the instrument according to the following steps:
1. Check whether there is any damage caused by transportation.
If the packing boxes or foam cushions are found to have serious damage, keep them in
a safe place until the complete instrument and accessories have passed the electrical
and mechanical tests.
2. Check the Accessories
Check that all the parts and accessories are included and in serviceable condition.
3. Check the Complete Instrument
If the instrument is damaged in its appearance or it fails in normal operation or
performance test, do not use it and contact the supplier directly.
How to Implement the Function Inspection
Make a fast function check to verify the normal operation of the instrument, according
to the following steps:
1. Connect the power cord to a power source. Push the power button marked " "
on the top of the unit.
The instrument carries out all self-check items and shows the Boot Logo. Press the
"Utility" button, then, press H1 button to get access to the "Function" menu. Turn
the M rotary control to select Adjust and press H3 button to select "Default". The
default attenuation coefficient set value of the probe in the menu is 10X.
2. Set the Switch in the Oscilloscope Probe as 10X and Connect the Oscilloscope
with CH1 Channel.
Align the slot in the probe with the plug in the CH1 connector BNC, and then tighten
the probe with rotating it to the right side.
Connect the probe tip and the ground clamp to the connector of the probe
compensator.
3. Press the "Autoset" Button.
The square wave of 1 KHz frequency and 5V peak-peak value will be displayed in
several seconds (see Figure 4-6).

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Figure 4-6 Auto set
Check CH2 by repeating Step 2 and Step 3.
How to Implement the Probe Compensation
When connect the probe with any input channel for the first time, make this
adjustment to match the probe with the input channel. The probe which is not
compensated or presents a compensation deviation will result in the measuring error
or mistake. For adjusting the probe compensation, please carry out the following
steps:
1. Set the attenuation coefficient of the probe in the menu as 10X and that of the
switch in the probe as 10X (see "How to Set the Probe Attenuation Coefficient"
on P14), and connect the probe with the CH1 channel. If a probe hook tip is used,
ensure that it keeps in close touch with the probe. Connect the probe tip with the
signal connector of the probe compensator and connect the reference wire clamp
with the ground wire connector of the probe connector, and then press the button
"Autoset".
2. Check the displayed waveforms and regulate the probe till a correct
compensation is achieved (see Figure 4-7 and Figure 4-8).
Overcompensated Compensated correctly Under compensated

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Figure 4-7 Displayed Waveforms of the Probe Compensation
3. Repeat the steps mentioned if needed.
Figure 4-8 Adjust Probe
How to Set the Probe Attenuation Coefficient
The probe has several attenuation coefficients, which will influence the vertical scale
factor of the oscilloscope.
To change or check the probe attenuation coefficient in the menu of oscilloscope:
(1) Press the function menu button of the used channels (CH1 MENU or CH2
MENU).
(2) Press H3 button to display the Probe menu; press the F1 button to select Attenu.
In the menu at the left of the screen, turn the Mrotary control to select the proper
value corresponding to the probe.
This setting will be valid all the time before it is changed again.
Caution: The default attenuation coefficient of the probe on the instrument is
preset to 10X.
Make sure that the set value of the attenuation switch in the probe is
the same as the menu selection of the probe attenuation coefficient in
the oscilloscope.
The set values of the probe switch are 1X and 10X (see Figure 4-9).
Figure 4-9 Attenuation Switch

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Caution: When the attenuation switch is set to 1X, the probe will limit the
bandwidth of the oscilloscope in 5MHz. To use the full bandwidth of
the oscilloscope, the switch must be set to 10X.
How to Use the Probe Safely
The safety guard ring around the probe body protects your finger against any electric
shock, shown as Figure 4-10.
Figure 4-10 Finger Guard
Warning:
To avoid electric shock, always keep your finger behind the safety guard
ring of the probe during the operation.
To protect you from suffering from the electric shock, do not touch any
metal part of the probe tip when it is connected to the power supply.
Before making any measurements, always connect the probe to the
instrument and connect the ground terminal to the earth.
How to Implement Self-calibration
The self-calibration application can make the oscilloscope reach the optimum
condition rapidly to obtain the most accurate measurement value. You can carry out
this application program at any time. This program must be executed whenever the
change of ambient temperature is 5℃or over.
Before performing a self-calibration, disconnect all probes or wires from the input
connector. Press the "Utility" button, then, press H1 button to call out the Function
menu; turn the M rotary control to choose Adjust. Press H2 button to choose the
option "Self Cal"; run the program after everything is ready.
Introduction to the Vertical System
As shown in Figure 4-11, there are a few of buttons and rotary controls in
VERTICAL CONTROLS. The following practices will gradually direct you to be
familiar with the using of the vertical setting.

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Figure 4-11 Vertical Control Zone
1. Use the "VERTICAL POSITION" rotary control to show the signal in the
center of the waveform window. The "VERTICAL POSITION" rotary control
functions the regulating of the vertical display position of the signal. Thus, when
the "VERTICAL POSITION" rotary control is rotated, the pointer of the earth
datum point of the channel is directed to move up and down following the
waveform.
Measuring Skill
If the channel is under the DC coupling mode, you can rapidly measure the DC
component of the signal through the observation of the difference between the
wave form and the signal ground.
If the channel is under the AC mode, the DC component would be filtered out.
This mode helps you display the AC component of the signal with a higher
sensitivity.
2. Change the Vertical Setting and Observe the Consequent State Information
Change.
With the information displayed in the status bar at the bottom of the waveform
window, you can determine any changes in the channel vertical scale factor.
Turn the vertical "VOLTS/DIV" rotary control and change the "Vertical
Scale Factor (Voltage Division)", it can be found that the scale factor of the
channel corresponding to the status bar has been changed accordingly.
Press buttons of "CH1 MENU", "CH2 MENU" and "Math", the operation
menu, symbols, waveforms and scale factor status information of the
corresponding channel will be displayed in the screen.

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Introduction to the Horizontal System
Shown as Figure 4-12, there are a button and two rotary controls in the
"HORIZONTAL CONTROLS". The following practices will gradually direct you
to be familiar with the setting of horizontal time base.
Figure 4-12 Horizontal Control Zone
1. Use the horizontal "SEC/DIV" rotary control to change the horizontal time base
setting and observe the consequent status information change. Rotate the
horizontal "SEC/DIV" rotary control to change the horizontal time base, and it
can be found that the "Horizontal Time Base" display in the status bar changes
accordingly.
2. Use the "HORIZONTAL POSITION"rotary control to adjust the horizontal
position of the signal in the waveform window. The "HORIZONTAL
POSITION"rotary control is used to control the triggering displacement of the
signal or for other special applications. If it is applied to triggering the
displacement, it can be observed that the waveform moves horizontally with the
rotary control when you rotate the "HORIZONTAL POSITION" rotary control.
3. With the "HORIZ MENU" button, you can do the Window Setting and the
Window Expansion.
Introduction to the Trigger System
As shown in Figure 4-13, there are one rotary control and three buttons make up
"TRIGGER CONTROLS". The following practices will direct you to be familiar
with the setting of the trigger system gradually.