multicomp pro MP720854 User manual

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MP720854 Four-Channel Series
Digital Storage Oscilloscopes
User Manual

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Table of Contents
1. General Safety Requirements.......................................................................................... 1
2. Safety Terms and Symbols............................................................................................... 2
3. Junior User Guidebook ................................................................................................... 4
Introduction to the Structure of the Oscilloscope..................................................................... 5
Front Panel ............................................................................................................................................... 5
Rear Panel ................................................................................................................................................ 6
Control Area............................................................................................................................................. 7
User Interface Introduction........................................................................................................ 8
How to Implement the General Inspection ............................................................................. 10
How to Implement the Function Inspection............................................................................ 10
How to Implement the Probe Compensation .......................................................................... 11
How to Set the Probe Attenuation Coefficient ........................................................................ 12
How to Use the Probe Safely..................................................................................................... 13
How to Implement Self-calibration.......................................................................................... 13
Introduction to the Vertical System......................................................................................... 14
Introduction to the Horizontal System .................................................................................... 15
Introduction to the Trigger System ......................................................................................... 16
Touchscreen Controls ............................................................................................................... 16
4. Advanced User Guidebook ............................................................................................ 22
How to Set the Vertical System ................................................................................................ 23
Use Mathematical Manipulation Function.............................................................................. 25
Waveform math.................................................................................................................................... 26
User defined function ............................................................................................................................. 27
Digital Filter ........................................................................................................................................... 27
Using FFT function ................................................................................................................................ 28
Use Vertical Position and Scale Controls ................................................................................ 33
How to Set the Horizontal System............................................................................................ 34
Waveform Horizontal Zooming ............................................................................................................. 34
Magnifier (For specific models)............................................................................................................. 35
How to Set the Trigger/Decoding System................................................................................ 37
Single Trigger......................................................................................................................................... 37
Logic Trigger.......................................................................................................................................... 46
Bus Trigger............................................................................................................................................. 47
Bus Decoding ......................................................................................................................................... 53
How to Operate the Function Menu ........................................................................................ 58
How to Implement Sampling Setup ....................................................................................................... 58

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How to Set the Display System .............................................................................................................. 59
How to Save and Recall a Waveform..................................................................................................... 62
How to Record/Playback Waveforms .................................................................................................... 69
How to Clone and Recall a waveform.................................................................................................... 73
How to Implement the Auxiliary System Function Setting.................................................................... 78
How to Update your Instrument Firmware............................................................................................. 81
How to Measure Automatically.............................................................................................................. 82
How to Measure with Cursors................................................................................................................ 87
How to Use Autoscale............................................................................................................................ 90
How to Use Built-in Help....................................................................................................................... 91
How to Use Executive Buttons............................................................................................................... 92
How to Print the Screen Image............................................................................................................... 94
7. Communication with PC ............................................................................................... 95
Using USB Port .......................................................................................................................... 95
Using LAN Port ......................................................................................................................... 95
Connect directly ..................................................................................................................................... 95
Connect through a router........................................................................................................................ 97
9. Demonstration ............................................................................................................. 101
Example 1: Measurement a Simple Signal............................................................................ 101
Example 2: Gain of a Amplifier in a Metering Circuit ........................................................ 102
Example 3: Capturing a Single Signal................................................................................... 103
Example 4: Analyze the Details of a Signal........................................................................... 104
Example 5: Application of X-Y Function .............................................................................. 106
Example 6: Video Signal Trigger ........................................................................................... 107
10. Troubleshooting ......................................................................................................... 109
11. Technical Specifications .............................................................................................110
Oscilloscope .............................................................................................................................. 110
Trigger.................................................................................................................................................. 113
General Technical Specifications ........................................................................................... 114
12. Appendix .....................................................................................................................116
Appendix A: Enclosure ........................................................................................................... 116
Appendix B: General Care and Cleaning.............................................................................. 116
Appendix C: Battery Using Guide ......................................................................................... 117

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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 the qualified technicians 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.
When powered by battery, the product must ground connection. 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 four 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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The diagram of the oscilloscope ground wire connection:
Ground Clip
Signal Input
Oscilloscope Electrical OutletProbe
Power Cord
The diagram of the ground wire connection when the battery-powered oscilloscope is
connected to the AC-powered PC through the ports:
Ground Clip
Signal Input
Oscilloscope
(Battery-power)
PC Electrical Outlet
Probe
USB/VGA/COM/
LAN Cable
It is not allowed to measure AC power when the oscilloscope is AC powered, or when
the battery-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
42V peak (30Vrms) 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. Junior User Guidebook
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 self-calibration
Introduction to the vertical system
Introduction to the horizontal system
Introduction to the trigger system
Touchscreen Contro

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Introduction to the Structure of the Oscilloscope
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 front panel has controls and function buttons. The 5 buttons in the column on the right
side of the display screen or in the row under the display screen are menu selection
buttons, through which, you can set the different options for the current menu. The other
buttons are function buttons, through which, you can enter different function menus or
obtain a specific function application directly.
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3
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98
1
6
2
7
Figure 3-1 Front panel
1. Display area
2. Select the right menu item
3. Control (button and control) area
4. Probe Compensation: Measurement signal (3.3V/1kHz) output.
5. Input connectors of four channels
6. Remove the left and right menu
7. Select the bottom menu item
8. Copy button: You can save the waveform by just pressing this button in any user
interface.

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9. USB Host port: It is used to transfer data when external USB equipment connects to
the oscilloscope regarded as "host device". For example: Saving the waveform to
USB flash disk needs to use this port.
10. Power on/off
Rear Panel
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11
1 2
6
4
5
Figure 3-2 Rear Panel
1. Handle
2. Air vents
3. AC power input jack
4. Fuse
5. Foot stool: Adjust the tilt angle of the oscilloscope.
6. VGA port: To connect the oscilloscope with a monitor or a projector as VGA output
7. LAN port: the network port which can be used to connect with PC.
8. 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.
9. Lock Hole: You can lock the oscilloscope to a fixed location using the security lock
(please buy it yourself) to secure the oscilloscope.
10. Trig Out(P/F) port: Trigger signal output or Pass/Fail output. The output type can be
set on the menu (Utility menu→Output→Output).

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Control Area
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2
3
8
7
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Figure 3-3 Control Area Overview
1. Function button area: Total 11 buttons
2. Waveform generator controls (optional)
or
DAQ: Multimeter Recorder (see "Multimeter Recorder" on PError! Bookmark not
defined.)
P/F: Pass/Fail (see "Pass/Fail" on P79)
W.REC: Waveform Record (see "How to Record/Playback Waveforms" on P69)
3. Trigger control area with 2 buttons and 1 control.
The Trigger Level control is to adjust trigger voltage. Other 2 buttons refer to trigger
system setting.
4. Horizontal control area with 1 button and 2 controls.
"HOR" button refer to horizontal system setting menu, "Horizontal Position" control
control trigger position, "Horizontal Scale" control time base.
5. Vertical control area with 5 buttons and 2 controls.
CH1 - CH4 buttons correspond to setting menu in CH1 - CH4. "Math" button
provides access to math waveform functions (+, -, ×, /, FFT, user function, digital
filter). The "Vertical Position" control control the vertical position of current channel,
and the "Scale" control control voltage scale of current channel.
6. Default: Call out the factory settings.
Print: Print an image of what appears on the instrument screen.
Decode: Turn on/off Decode function.
7. Direction key:Move the cursor of the focused parameter.
8. Mcontrol (Multipurpose control): when a symbol appears on the menu, it
indicates you can turn the M control to select the menu or set the value. You can push