multicomp pro MP Dual Channel Series User manual

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MP Four-Channel Series Tablet Oscilloscopes
User Manual
Models MP720645, MP720775 and MP720776

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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
Side Panel ................................................................................................................................6
Top Panel .................................................................................................................................7
User Interface Introduction..........................................................................................7
How to Implement the General Inspection ...................................................................9
How to Implement the Function Inspection ................................................................10
How to Implement the Probe Compensation..............................................................10
How to Set the Probe Attenuation Coefficient ............................................................11
How to Use the Probe Safely ....................................................................................12
How to Implement Self-calibration.............................................................................13
Introduction to the Vertical System............................................................................13
Introduction to the Horizontal System........................................................................14
Introduction to the Trigger System.............................................................................15
Touchscreen Controls...............................................................................................16
4. Advanced User Guidebook.................................................................................. 22
How to Set the Vertical System.................................................................................23
How to Set the Horizontal System.............................................................................25
Waveform Horizontal Zooming ...............................................................................................26
Magnifier(For specific models)...........................................................................................26
How to Operate the Function Menu...........................................................................28
Set the Trigger/Decoding System ...........................................................................................28
Single Trigger............................................................................................................................................ 29
Logic Trigger.............................................................................................................................................. 37
Bus Trigger................................................................................................................................................ 38
Bus Decoding............................................................................................................................................ 44
Implement Sampling Setup.....................................................................................................49
Implement the Auxiliary System Function Setting...................................................................51
Set the Display System...........................................................................................................53
Save and Recall a Waveform .................................................................................................56
Record/Playback Waveforms..................................................................................................63
Clone and Recall a waveform.................................................................................................67
Update your Instrument Firmware...........................................................................................70
Measure Automatically............................................................................................................72
Customize an Automatic Measurement..................................................................................76
Measure with Cursors.............................................................................................................77
Use Mathematical Manipulation Function...............................................................................80
Waveform math......................................................................................................................................... 81
User defined function................................................................................................................................ 82
Digital Filter................................................................................................................................................ 82
Use Autoscale function...........................................................................................................83
Use HOR function...................................................................................................................84

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Use FFT function ....................................................................................................................85
Use XY Format.......................................................................................................................91
Use Pass/Fail function............................................................................................................92
Use Executive Buttons............................................................................................................94
Print the Screen Image...........................................................................................................95
5. Communication with PC....................................................................................... 97
Using USB Port ........................................................................................................97
Using LAN Port.........................................................................................................98
Connect directly......................................................................................................................98
Connect through a router......................................................................................................100
Using Wi-Fi to Connect with PC ..............................................................................102
Connect with PC as Wi-Fi Access Point ...............................................................................102
Connect with PC as Wi-Fi Station.........................................................................................103
6. Communication with Android Device via Wi-Fi (Optional) ...............................106
How to Connect......................................................................................................106
Connect with APP as Wi-Fi Access Point.............................................................................106
Connect with APP as Wi-Fi Station.......................................................................................108
User Interface.........................................................................................................110
Gestures Control.....................................................................................................112
7. Demonstration.....................................................................................................113
Example 1: Measurement a Simple Signal...............................................................113
Example 2: Gain of a Amplifier in a Metering Circuit.................................................114
Example 3: Capturing a Single Signal......................................................................115
Example 4: Analyze the Details of a Signal..............................................................117
Example 5: Application of X-Y Function...................................................................118
Example 6: Video Signal Trigger.............................................................................120
8. Troubleshooting..................................................................................................121
9. Technical Specifications.....................................................................................122
Oscilloscope...........................................................................................................122
Trigger....................................................................................................................125
General Technical Specifications.............................................................................127
10. Appendix...........................................................................................................128
Appendix A: Enclosure............................................................................................128
Appendix B: General Care and Cleaning.................................................................129
Appendix C: Battery Using Guide............................................................................130

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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.
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.
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
Electrical Outlet
Probe Oscilloscope AC Adapter
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 OutletProbe
USB/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 Controls

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Introduction to the Structure of the Oscilloscope
This chapter makes a simple description of the operation and function of the
oscilloscope, enabling you to be familiar with the use of the oscilloscope in the
shortest time.
Front Panel
The front panel has knobs and function buttons. Through the function buttons, you
can enter different function menus or obtain a specific function application directly.
10
1 3
4
7
12 11
9
6
2
5
8
Figure 3-1 Front panel
1. LCD touchscreen
2. CH1 - CH4 buttons: Access to setting menu of CH1 - CH4.
3. Power button: Power on/off
4. The upper knob:
When one of the CH1 - CH4 buttons is lighted, this knob is used to adjust the
vertical position of current channel,
When HOR button is lighted, this knob is used to adjust the horizontal
positions of all channels (including mathematical operations).
When Trigger button is lighted, this knob is used to adjust trigger level.
5. HOR button: When the button light is off, press to light on, the upper and lower
knob are for horizontal system. Press to switch between the normal mode and

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the waveform zooming mode.
6. Trigger button: Accesses to trigger system setting. When the button light is on,
the upper knob is used to adjust trigger level of current channel.
7. The lower knob:
When one of the CH1 - CH4 buttons is lighted, this knob is used to adjust the
voltage scale of current channel.
When HOR button is lighted, this knob is used to adjust time base.
8. Copy button: You can save the waveform by just pushing this button in any
user interface. The source wave and the storage location are set in the Save
menu when the Type is Wave ( → Save).
9. Default button: Press this button, a prompt will show, press again to execute
the factory settings.
10. Autoset button: Quick way to apply a set of pre-set functions to the incoming
signal, and display the best possible viewing waveform of the signal.
11. Single button: Set the trigger mode as single directly.
12. Run/Stop button: Enable or disable sampling on input signals.
Side Panel
1
2
3
4
5
6
Figure 3-2 Side Panel
1. Probe Compensation: Measurement signal (5V/1kHz) output.
2. Trig Out or Pass/Fail output connector: Trigger signal output or Pass/Fail
output. The output type can be set on the menu ( → Utility → Function →
Output → Output).
3. 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.

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4. 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.
5. LAN port: the network port which can be used to connect with PC.
6. Connector for the DC power source via an AC-DC adapter
Top Panel
Input connectors of four channels
Figure 3-3 Top Panel
User Interface Introduction
139
21
15
29
26
6810 12
16
13
17
22
24
30
32
711
27
245
25
14
5
20
31
18
19
23
28
Figure 3-4 Illustrative Drawing of Display Interfaces
1. Waveform Display Area.
2. Run/Stop (touchable) (see "Use Executive Buttons" on P97)
3. 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. Click the

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to force a trigger signal, which is mainly applied to the
"Normal" and "Single" trigger modes.
Scan: Capture and display the waveform continuously.
Stop: Data acquisition stopped.
4. Click to auto set.
5. The two blue dotted lines indicates the vertical position of cursor
measurement.
6. The pointer indicates the trigger position in the record length.
7. The T pointer indicates the horizontal position for the trigger.
8. Itshows present triggering value and displays the site of present window in
internal memory.
9. Touchable icon is to enable ( ) or disable ( ) the touchscreen
controls.
10. It shows setting time (see "Config" on P51).
11. Wi-Fi is activated.
12. It indicates that there is a USB disk connecting with the oscilloscope.
13. Indicating battery power status (see "Display" on P51).
14. The waveform of CH1.
15. The pointer shows the trigger level position of the source in trigger menu.
16. The two blue dotted lines indicate the horizontal position of cursor
measurement.
17. The waveform of CH2.
18. The waveform of CH3.
19. The waveform of CH4.
20. The frequency of the trigger signal.
21. The icon shows the selected trigger type, e.g. represents triggering on
the rising edge for an Edge trigger. The reading shows the trigger level
value of the corresponding channel.
22. Click to show/hide the touchable menu panel.
23. It indicates the measured type and value of the corresponding channel. "T"
means period, "F" means frequency, "V" means the average value, "Vp"
the peak-peak value, "Vr" 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, "WP" the Screen Duty, "FRR" the FRR, "FRF" the FRF, "FFR" the
FFR, "FFF" the FFF, "LRR" the, "LRF" the LRF, "LFR" the LFR, "LFF" the
LFF, "PD" the Delay A->B value, "ND" the Delay A->B value, "TR"
the Cycle RMS, "CR" the Cursor RMS, "RP" the Phase A->B , "FP" the

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Phase A->B , "+PC" the +Pulse count, "-PC" the - Pulse count, "+E" the
Rise edge count, "-E" the Fall edge count, "AR" the Area, "CA" the Cycle
area.
24. The readings show the record length.
25. The readings show current sample rate.
26. The readings indicate the corresponding Voltage Division of the channels.
"BW" indicates bandwidth limit.
The icon shows the coupling mode of the channel.
"—" indicates direct current coupling
"~" indicates AC coupling
" " indicates GND coupling
27. The reading shows the setting of main time base.
28. The green pointer indicates the grounding datum point (zero point position)
of the waveform of the CH1 channel.
29. The orange pointer indicates the grounding datum point (zero point
position) of the waveform of the CH1 channel.
30. It is cursor measure window, showing the absolute values and the
readings of the cursors.
31. The blue pointer indicates the grounding datum point (zero point position)
of the waveform of the CH1 channel.
32. The yellow pointer indicates the grounding datum point (zero point position)
of the waveform of the CH1 channel.
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 it is found that the packaging carton or the foamed plastic protection cushion
has suffered serious damage, do not throw it away first till the complete device
and its accessories succeed in the electrical and mechanical property tests.
2. Check the Accessories
The supplied accessories have been already described in the "Appendix A:
Enclosure" of this Manual. You can check whether there is any loss of
accessories with reference to this description. If it is found that there is any
accessory lost or damaged, please get in touch with our distributor responsible
for this service or our local offices.
3. Check the Complete Instrument
If it is found that there is damage to the appearance of the instrument, or the
instrument can not work normally, or fails in the performance test, please get in
touch with our distributor responsible for this business or our local offices. If
there is damage to the instrument caused by the transportation, please keep
the package. With the transportation department or our distributor responsible

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for this business informed about it, a repairing or replacement of the instrument
will be arranged by us.
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. Long press the button on the top right of the instrument.
The instrument carries out all self-check items and shows the Boot Logo. Push
the Default button on the front panel. The default attenuation coefficient set
value of the probe on 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. Push the Autoset button on the front panel.
The square wave of 1 kHz frequency and 5Vpeak-peak value will be displayed
in several seconds (see Figure 3-5).
Figure 3-5 Auto set
Check CH2, CH3 and CH4 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

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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 on the menu as 10X and that of
the switch in the probe as 10X (see "How to Set the Probe Attenuation
Coefficient" on P11), 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 push the Autoset button on the front panel.
2. Check the displayed waveforms and regulate the probe till a correct
compensation is achieved (see Figure 3-6 and Figure 3-7).
Overcompensated Compensated correctly Under
compensated
Figure 3-6 Displayed Waveforms of the Probe Compensation
3. Repeat the steps mentioned if needed.
Figure 3-7 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 on the menu of
oscilloscope:
(1) Push the function menu button of the used channels (CH1 - CH4 button).
(2) Select Probe in the bottom menu; select Attenu in the right menu, select
the proper value corresponding to the probe in the left menu.

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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 3-8).
Figure 3-8 Attenuation Switch
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 3-9.
Figure 3-9 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.

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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. Click the icon, select the Utility softkey, select Function
in the bottom menu, select Adjust in the left menu, select Self Cal in the
bottom menu; run the program after everything is ready.
Introduction to the Vertical System
As shown in Figure 3-10, there are a few of buttons and knobs in Vertical
Controls.
Press one of the channel buttons CH1, CH2, CH3 or CH4 to open the
corresponding channel menu, and press again to turn off the channel.
If you want to set the vertical position and vertical scale of a channel, please
press CH1, CH2, CH3 or CH4 at first to select the desired channel. Then turn
the upper or lower knob to set the values.
Upper knob: adjust vertical position
When one of the
channel buttons is lit
Lower knob: adjust vertical scale
Figure 3-10 Vertical Control
The following practices will gradually direct you to be familiar with the using of the
vertical setting.
1. Press CH1, CH2, CH3 or CH4 panel button to select the desired channel.
2. When one of the channel buttons is lit, you can use the upper knob to show the
selected channel waveform in the center of the waveform window. The upper
knob functions the regulating of the vertical display position of the selected
channel waveform. Thus, when the upper knob is rotated, the pointer of the
earth datum point of the selected channel is directed to move up and down
following the waveform, and the position message at the center of the screen
would change accordingly.
Measuring Skill

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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.
Vertical offset back to 0 shortcut key
Turn the upper knob to change the vertical display position of the selected
channel, and push the upper knob to set the vertical display position back to 0
as a shortcut key, this is especially helpful when the trace position is far out of
the screen and want it to get back to the screen center immediately.
3. 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 lower knob and change the "Vertical Scale Factor (Voltage Division)"
of the selected channel, it can be found that the scale factor of the selected
channel in the status bar has been changed accordingly.
Introduction to the Horizontal System
Shown as Figure 3-11, there are a button and two knobs in the Horizontal
Controls. The following practices will gradually direct you to be familiar with the
setting of horizontal time base.
Upper knob: adjust horizontal position
When the HOR
button is lit
Lower knob: adjust horizontal scale
Figure 3-11 Horizontal Control
1. When the HOR button is lit, push the HOR button to switch between the
normal mode and the wave zoom mode.
2. When the HOR button is lit, turn the lower knob to change the horizontal
time base setting and observe the consequent status information change.
Turn the lower knob to change the horizontal time base, and it can be

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found that the Horizontal Time Base displayed in the status bar changes
accordingly.
3. When the HOR button is lit, use the upper knob to adjust the horizontal
position of the signal in the waveform window. The upper knob 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 knob when you
rotate the upper knob.
Triggering displacement back to 0 shortcut key
Turn the upper knob to change the horizontal position of channel and push the
upper knob to set the triggering displacement back to 0 as a shortcut key.
Introduction to the Trigger System
As shown in Figure 3-12, there are one knob and one button make up Trigger
Controls. The following practices will direct you to be familiar with the setting
of the trigger system gradually.
Upper knob: adjust trigger level
When the Trigger button is lit
Figure 3-12 Trigger Control Zone
1. Click the icon on the right bottom of the display area, click Trig Menu
to call out the trigger menu in the bottom. The trigger setting can be
changed.
2. When the Trigger button is lit, use the upper knob to change the trigger
level setting.
By turning the upper knob, the trigger indicator in the screen will move up
and down. With the movement of the trigger indicator, it can be observed
that the trigger level value displayed in the screen changes accordingly.
Note: Turning the upper knob can change trigger level value and it is also
the hotkey to set trigger level as the vertical mid point values of the
amplitude of the trigger signal.
3. Click the on the left top of the display area to force a trigger signal,
which is mainly applied to the "Normal" and "Single" trigger modes.

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Touchscreen Controls
You can control the oscilloscope by different gestures. The touchable icon at the
top right of the screen is used to enable ( ) or disable ( ) the touchscreen
controls.
The instruction of touchscreen controls is as below.
Run/Stop: Click the or on the left top of the display area to run or stop
the waveform sampling.
Force trigger: Click the on the left top of the display area to force a
trigger signal, which is mainly applied to the "Normal" and "Single" trigger
modes.
Autoset: Click the on the left top of the display area to auto set.
Select a menu item: Touch the menu items in the bottom menu, or in the right
menu, or in the left menu.
Switch menu items: If there are options that can be switched on the menu,
you can repeatedly touch the area of the menu item to switch, or push the
corresponding button to switch. See figure below:
Press repeatedly to
switch the options
Adjust value on the menu item:
Click to increase the
value of cursor position
Move the cursor
Click to decrease the
value of cursor position
Scroll the list: If there is a scroll bar in the left menu, you can swipe up and
down to scroll the list.
Touchable menu panel: Click the icon on the right bottom of the display
area, a menu will be shown. Click to enter the corresponding function menu.

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When OFF is shown, click to turn on the function, and enter the menu.
When ON is shown and unselected, click to enter the menu, click again to turn
off.
Set the channel status: Click the channel on the left bottom of the display
area, you can turn on, select or turn off the channel. You can also touch the
channel pointer on the left side of the display area to make it in selected state.
Channel is off
Channel is on and selected
Channel is on
Selected Unselected
Channel pointer
Set the horizontal and vertical position
Click in the area as shown in the figure below, the Picon will appear. Click
anywhere outside the icon to hide it.
Note: Swipe up/down or left/right in this area, you can make the icon appear and
control it.
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