Huidu Technology HDP902 Technical manual

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Operation instruction
Video processor & splicer HDP902
V1.0 20190903

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Safety instructions
This symbol prompts the user, the device user manual has important
operating and maintenance instructions.
This symbol warns the user that there is a dangerous voltage that is exposed
inside the device enclosure and there is a risk of electric shock.
Note
Read the manual• Read and understand all safety and operating instructions before
using the equipment.
Save the manual• The safety instructions should be kept for future reference.
Follow Warnings • Follow all warnings and instructions marked on the equipment or
in the user information.
Avoid Attachments • Do not use tools or attachments that are not recommended by
the equipment manufacturer because they may be hazardous.
Warning
Power sources • This equipment should be operated only from the power source
indicated on the product. This equipment is intended to be used with a main power
system with a grounded (neutral) conductor. The third (grounding) pin is a safety
feature, do not attempt to bypass or disable it.
Power disconnection • To remove power from the equipment safely, remove all
power cords from the rear of the equipment, or the desktop power module (if
detachable), or from the power source receptacle (wall plug).
Power cord protection • Power cords should be routed so that they are not likely to
be stepped on or pinched by items placed upon or against them.
Servicing • Refer all servicing to qualified service personnel. There are no
user-serviceable parts inside. To prevent the risk of shock, do not attempt to service
this equipment yourself because opening or removing covers may expose you to
dangerous voltage or other hazards.
Slots and openings • If the equipment has slots or holes in the enclosure, these are
provided to prevent overheating of sensitive components inside. These openings must
never be blocked by other objects.

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Contents
introduction.....................................................................................错误！未定义书签。
About LED Video Processor................................................ 错误！未定义书签。
Panel................................................................................................ 错误！未定义书签。
Front Panel
Rear Panel..............................................................................错误！未定义书签。
Menu System...................................................................................错误！未定义书签。
Menu Structure..................................................................... 错误！未定义书签。
Operation menu.....................................................................错误！未定义书签。
Default menu................................................................ 错误！未定义书签。
Main menu....................................................................错误！未定义书签。
Setting and Operation....................................................................错误！未定义书签。
Language................................................................................错误！未定义书签。
Reset....................................................................................... 错误！未定义书签。
Output Resolution.................................................................错误！未定义书签。
Switching Effect.....................................................................错误！未定义书签。
Fade time settings........................................................ 错误！未定义书签。
Black and Freeze settings............................................错误！未定义书签。
Splicing applications.......................................................................错误！未定义书签。
Equal Splicing（Left and right splicing）................ 错误！未定义书签。
Unequal Splicing.......................................................... 错误！未定义书签。
Capture...................................................................................错误！未定义书签。
PIP....................................................................................................错误！未定义书签。
Keying.................................................................................... 错误！未定义书签。
Preset...................................................................................... 错误！未定义书签。
12.Save Preset...............................................................错误！未定义书签。
13.Recall Preset............................................................ 错误！未定义书签。
14.Key Lock........................................................................... 错误！未定义书签。
15.VGA Adjust.......................................................................错误！未定义书签。
Specifications.................................................................................. 错误！未定义书签。

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Chapter 1 Overview
HDP902 the LED splicing processor has three powerful video processing cores.
Multiple-graphic multiple-input intelligent splicing processor, it can be widely used in
performing arts activities, command and control centers, video conferences, hotels,
courts and conference rooms.
HDP902 It is a powerful 3-channel multiple-graphic multiple-input splicing processor
that can be widely used in small and medium splicing fields, as well as for image
switching and image scaling. The splicing processor has 3 channels of splicing, 1
channel of monitoring, and the widest can be spliced by 11520 points, and the highest
splicing can be 5760 points.
It can also achieve equal-splicing, unequal splicing, display of different resolutions,
three-screen splicing and other functions.
HDP902 Can access up to 13 channels of video input, including 2 channels of DVI, 4
channels of HDMI, 2 channels of VGA, 4 channels of CVBS, 1 channel of 3G-SDI /
SDI-LOOP (optional); Each channel can receive standard resolution or high
resolution video signals, DVI and VGA can receive up to 1920 × 1200 @ 60Hz
resolution input.
The splicing processor has 3 channels (6DVI-I interface) video output, 1 channel
monitor output (DVI-I), and 2 DVI-I connectors per channel for more device
connections.The output resolution of each channel can be set by the user to meet
various high-definition performances.
The splicing processor design is more user-friendly, easier to use with powerful
features, simple to use the button panel and menu system, just touch your finger to
complete complex settings.Complete setup and operation are available with the front
panel and RS-232. It provides a wide range of physical interfaces to meet the needs of
common output devices.Provides installation locations for up to 4 LED transmit cards,
simplifying installation setup. Rotate quickly to adjust the picture or related
parameters, user settings are handy.

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Chapter 2 Panel
1.Rear panel
Page 1—Video processor rear panel
①AC power input —Connect to the video processor using an IEC standard power
cord with an input power of 100-240 VAC, 50-60 Hz.
②Video input —Input standard for each interface.
●CV1、CV2、 CV3、 CV4 Composite video input，With the BNC interface, the input
video supports PAL, PAL-M/N, NTSC, and SECAM formats. You can connect a
DVD player, a video camera, etc.
●DVI1, DVI2 digital video input, using DVI-I standard interface, can use DVI-I or
DVI-D cable, video input format supports VESA standard.
●HDMI1, HDMI2, HDMI3, HDMI4 HD video input, using HDMI-A standard
interface, input video supports HDMI1.3 standard and VESA standard. Commonly
used to connect desktop computers and HDMI HD players.
●VGA1, VGA2 video input, using DB-25 standard interface, input video supports
VESA standard, used to connect desktop computer, notebook or other VGA video
output device.
●SDI digital video input, SDI-LOOP, SDI signal loop out, use BNC interface, input
video supports HD camera.
③Video output —Processor programming video output interface
● DVI video output, using DVI-I connector, the output video format is set by the
processor, three groups of CH-A, CH-B, CH-C simultaneously output the same signal.
Often used to connect to an LED send card or monitor.
④CH-M/Monitor output, using DVI-I connector, output video is connected to the
display, as a display user's real-time operation image position and switching effects.
⑤RS-232 — Serial communication connector for engineering test, program burning,
PC software control, communication baud rate is 115200bps.
⑥LED Sending Card — The reserved LED sending card installation location allows
for the installation of 4 sending Cards. When installing, the user can first disassemble
the back cover and the small cover, and install and fix it. There are 6 5V power
connectors and 2.0x4 PIN connectors inside. Plug in the 5V power supply after
installation.

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Page 2—LED sending card
2.Front panel
Page 3—Processor front panel
①Menu operation keys — The menu operation keypad contains the “Back Key”
and the knob “Confirm and Adjust”. Here are the meanings and usage of each button:
●Key, menu exit key, or return to the previous menu.
●Knob, press the OK button to enter the menu or the next menu button to confirm the
function. Rotate left and right to + "Add" - "Subtract" operation, you can adjust the
menu position or adjust the parameter value to become smaller.
②LCD display — Displays menus and current information.
③④⑤ Input Selection — In the INPUT button area, all 13 channels of input
switching keys, test patterns, and VGA auto-correction function keys are included.
The button indicators in the keypad have three states, namely:
The button indicator flashes slowly：The flicker interval is about 1 second and is
always flashing, indicating that there is no signal when the channel switched by the
watch.
The button light flashes rapidly: When the button is pressed, the button indicates
that the flashing time is about 0.3 seconds, which indicates that the device is detecting
and decoding the input video.
The button indicator is always on: It indicates that the current channel signal is
connected normally or the current function is working. The following is a detailed
description of the functions of the keys in the input keypad.

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Page 4—INPUT Keypad
Main channel input（INPUTS-MAIN）
●CV1, CV2 composite video switching button.
● VGA1, VGA2 button, VGA input switch button and auto correction button (AUTO function).
When the input channel is VGA1 or VGA2, press the VGA1 or VGA2 button repeatedly, the
video processor will correct the current VGA channel and make the picture output normal. AUTO
function of VGA channel: When the input channel is VGA1, and VGA1 has screen output, press
VGA1 (AUTO) again to re-calibrate the current VGA1 signal. The VGA2 button also has the
same function and operation.
● DVI1, DVI2, HDMI1, HDMI2, SDI keys respectively correspond to DVI1, DVI2, HDMI1,
HDMI2, SDI video input interfaces on the rear panel.
A&C Channel input（INPUTS-A,INPUTS-C）
●CV3, CV4 composite video switching button.
●The HDMI3 and HDMI4 buttons correspond to the HDMI3 and HDMI4 video input
interfaces on the rear panel.
●The MAIN button is the main channel button, and the A&C channel input defaults
to the main channel input (the MAIN button is always on).
⑥⑦Function Keypad — The function keypad contains the on-screen mode, black
screen, preset call,PIP( picture-in-picture), and toggle effect buttons for quick
operation of each function.
Page 5—Function keypad
PRESET button, preset scene loading shortcuts. Press this button to adjust the preset scene list,
and then use the menu function button to adjust the preset scene. The saving and recalling of
preset scenes will be described in detail in the following sections.
● Part button, part of the screen display mode, after the user sets the interception parameters of
some screens in the splicing menu, press this button to display part of the screen effect. A detailed
description of the operation is given in the following sections.

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● Black button, press this button to output a black screen or freeze to the “Switch” menu to set.
● PIP button to enable or disable the PIP function button. The user sets the PIP parameters in the
PIP menu in advance, and uses the PIP shortcut key to quickly turn the PIP function on or off. The
use of PIP is described in detail in the following sections.
Tip: When the PIP (Picture in Picture) function is active, the CUT
function and the FADE function (fast switching effect and fade transition
effect) cannot be used.
● Fn key, press this key is the multiple-function key, the INPUT-A keypad and the INPUT-C
keypad are switched synchronously.
○
8 AC switch — The front AC power switch.

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Chapter III Menu System
1.Menu structure diagram
1）Menu structure
Page 6 Splicing processor main menu structure diagram
main menu
Output
Default menu
splice
Multi-sreen
image
Features
system
Main function description
Set the output resolution and fine-tune the output
Adjust aliquot stitching, unequal splicing or partial image display
Set the size, position, and input source of multiple screens
Adjust image color, brightness, contrast, etc.
Set language, save or recall preset keys, etc.
Set system functions, view system information, machine reset, etc.

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2）Menu operation
The operation keys of the menu mainly have “return key”，OK“confirm”key，The man-machine
interface is a 256x64 dot matrix LCD screen.
The start process of the device is as follows:
Page7-The processor is powered on and enters the main menu process
3）Default menu
The default menu is the interface of the LCD screen after the device is started. It displays the input
signal source, input signal source connection status, input signal source connection status, output
resolution, stitching mode, brightness, etc., showing the processor menu system. The main
parameters. All input selection keys and function keys are available in the default menu.
--------Input source ---------- ---------Features---------
Input M：HDMI 1920x1080/60 preset【1】
Input A：HDMI 1920x1080/60
Input B：HDMI 1920x1080/60 brightness：50
Input C：HDMI 1920x1080/60
Page8-Default menu
4）main menu
The main menu is an important operation interface for user parameter adjustment. Almost all
settings can be completed under the main menu. The operation and settings of each function are
described in detail in the following sections.
Page9-main menu
FN
Power-on
The LCD screen displays the
product logo and model; the
button indicator flashes 3 times.
Default
menu
Main
menu
OK
Output
splice
Multi-screen
image
Feature
system

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Chapter 4 Setup and Operation
1.language
Before using the LED video processor, first confirm that the language is suitable for your use. If
not, please follow the steps below to complete the setup. as follows
Default menu→ main menu→ Feature→ language
Above is the menu operation path. Enter the language setting menu and use the knob "Confirm
and Adjust" to select the language.
2.Reset
When using the LED video processor, you may enter the menu to reset the whole machine due to
incorrect parameter settings or problems that cannot be confirmed. The following is the reset
operation process of the whole machine.
Default menu→ main menu→ system→ Machine reset→ reset confirmation
After the reset is completed, all user parameters are restored to the factory state, please use
caution.
3.Output resolution
To use a different resolution display or LED screen, to achieve point-to-point output, you must set
the output resolution and precise adjustment of the resolution.
(1) First select a resolution larger than the display
Default Menu → Main Menu → Output → Monitor / Output A / Output B / Output C → Output
Resolution → Common Resolution → Confirm or
Default Menu → Main Menu → Output → Monitor / Output A / Output B / Output C → Output
Resolution → Custom Resolution → Confirm
（2）Finely adjust the output resolution
Common resolution→Custom resolution→
Tip: After the user resets the output resolution, the system will reset all parameters of the splicing menu to
ensure data consistency. The user's precisely adjusted resolution can only be smaller than the currently
selected resolution. When the precisely adjusted resolution is equal to the currently selected resolution,
the horizontal start value and the vertical start value cannot be adjusted.
3.Set the switching effect
The processor has two switching effects, which are fast cut and fade in and out.
Go to the menu settings, as follows
Default menu → main menu → function → seamless switching
Horizontal width
Vertical height
Horizontal start
Vertical start
Horizontal width
Vertical height
frequency
Change resolution

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Fade time setting
The fade time can control the length of the fade transition state, and the processor provides a fade
time setting of 0.5 seconds to 1.5 seconds. Enter the menu settings as follows
Default menu → main menu → function → fade time
4.Black screen and screen freeze settings
The black screen and the screen freeze share an operation key BLACK, which is displayed as
"BLACK key" in the menu system. Its setting method is as follows
Default menu → main menu → function → BLACK button function
After setting, press the BLACK button directly to achieve black screen or screen freeze.
5.Splicing application
The processor has a powerful splicing function with a maximum output resolution of 3840 x 1920
@60Hz and 2560 x 2880@60Hz for frame synchronization. The splicing methods include
horizontal 3 picture 2 splicing, horizontal 1 picture 3 splicing, horizontal 1 picture 2 splicing,
horizontal 3 picture 3 splicing, vertical 2 picture 3 splicing, horizontal 2 picture 3 splicing, vertical
1 picture 3 splicing, detailing splicing below usage of.
Tip：Before setting the splicing parameters, first confirm whether the output A/output B/output C channel resolution is set.
6.Level 1 picture 3 stitching (take the total number of images 3840X1152@60Hz as an example)
Output A channel stitching settings
Default menu→Main menu→Splicing→Splicing A→Splicing→On
Default menu → main menu → stitching → stitching A → stitching mode → not equal
Default Menu→Main Menu→Splicing→Splicing A→Parameter Setting→Horizontal Total
Pixels→3840
Default Menu→Main Menu→Splicing→Splicing A→Parameter Setting→Vertical Total
Pixels→1152
Default menu→Main Menu→Splicing→Splicing A→Parameter Setting→Horizontal Start→0
Default menu→Main Menu→Splicing→Splicing A→Parameter Setting→Vertical Start→0
Output B channel stitching settings
Default menu→Main menu→Splicing→Splicing B→Splicing→On
Default menu → main menu → stitching → stitching B→ stitching mode → not equal
Default Menu→Main Menu→Splicing→Splicing B→Parameter Setting→Horizontal Total
Pixels→3840
Default Menu→Main Menu→Splicing→Splicing B→Parameter Setting→Vertical Total
Pixels→1152
Default menu→Main Menu→Splicing→Splicing B→Parameter Setting→Horizontal Start→768
Default menu→Main Menu→Splicing→Splicing B→Parameter Setting→Vertical Start→0
Output C channel stitching settings

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Default menu→Main menu→Splicing→Splicing C→Splicing→On
Default menu → main menu → stitching → stitching C → stitching mode → not equal
Default Menu→Main Menu→Splicing→Splicing C→Parameter Setting→Horizontal Total
Pixels→3840
Default Menu→Main Menu→Splicing→Splicing C→Parameter Setting→Vertical Total
Pixels→1152
Default menu→Main Menu→Splicing→Splicing C→Parameter Setting→Horizontal Start→3072
Default menu→Main Menu→Splicing→Splicing C→Parameter Setting→Vertical Start→0
Tip：Input signals can only be selected by switching to MAIN in INPUTS.
7. Horizontal 3 picture 3 stitching (take the total number of images 3328X1920@60Hz as an
example)
Output A channel stitching settings
Default menu→Main menu→Splicing→Splicing A→Splicing→On
Default menu → main menu → stitching → stitching A → stitching mode → not equal
Default Menu→Main Menu→Splicing→Splicing A→Parameter Setting→Horizontal Total
Pixels→3328
Default Menu→Main Menu→Splicing→Splicing A→Parameter Setting→Vertical Total
Pixels→1920
Default menu→Main Menu→Splicing→Splicing A→Parameter Setting→Horizontal Start→0
Default menu→Main Menu→Splicing→Splicing A→Parameter Setting→Vertical Start→0
Output B channel stitching settings
Default menu→Main menu→Splicing→Splicing B→Splicing→On
Default menu → main menu → stitching → stitching B → stitching mode → not equal
Default Menu→Main Menu→Splicing→Splicing B→Parameter Setting→Horizontal Total
Pixels→3328
Default Menu→Main Menu→Splicing→Splicing B→Parameter Setting→Vertical Total
Pixels→1920
Default menu→Main Menu→Splicing→Splicing B→Parameter Setting→Horizontal Start→768
Default menu→Main Menu→Splicing→Splicing B→Parameter Setting→Vertical Start→0
Output C channel stitching settings
Default menu→Main menu→Splicing→Splicing C→Splicing→On
Default menu → main menu → stitching → stitching C → stitching mode → not equal
Default Menu→Main Menu→Splicing→Splicing C→Parameter Setting→Horizontal Total
Pixels→3328
Default Menu→Main Menu→Splicing→Splicing C→Parameter Setting→Vertical Total
Pixels→1920
Default menu→Main Menu→Splicing→Splicing C→Parameter Setting→Horizontal Start→2048
Default menu→Main Menu→Splicing→Splicing C→Parameter Setting→Vertical
Start→0

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Tip: The A and C channel signal selection is in A&C, and the B channel signal selection is in MAIN.
8. Capture part of the screen
Intercepting part of the screen function is an extension of the unequal splicing function. In actual
use, a partial screen display may be used to display only a partial area of an input channel. For
example, in the Windows operation interface, the user only needs to display the video playback
window in the DVI1 channel, and other input channels are displayed in full screen. Press the
PART button to turn on some functions, press the PRART button to turn off some functions.
When switching channels, just select the PART effect for the desired channel in advance, the
device will automatically save the current output effect for the input channel, that is, for each input
channel. The display mode can be different. As shown below.
Full screen effect Partial effect
Page10-Capture part of the screen
If you want to set the intercept parameters manually, the setting is as follows
：
(1) Select the channel to capture part of the picture, such as DVI1;
(2) Enter the splicing menu to set the unequal splicing parameters (equivalent to intercepting part
of the screen parameters), and the total pixel value and the starting value are adjusted by visual
inspection.
Default menu → main menu → function → partial function → open
Default menu → main menu → function → partial function → partial mode → user
Default Menu → Main Menu → Features → Some Functions → Horizontal Total Pixels (User
Defined)
Default menu → main menu → function → partial function → vertical total pixel (user defined)
Default menu → main menu → function → partial function → horizontal start (user defined)
Default menu → main menu → function → partial function → vertical start (user defined)
9. Use of multiple screens
Picture-in-picture is the use of digital technology to display two or three sets of programs on the
same screen. That is, on the main screen of normal viewing, one or more compressed sub-pictures
are simultaneously inserted to monitor other channels while enjoying the main picture. When
working in the picture-in-picture mode, the user needs to provide at least two signal inputs and set
the corresponding multiple-screen menu accordingly. Steps for using picture-in-picture:
(1) Open multiple-screen, there are two ways to open, one is to press the PIP button, and the other
is to open the menu system.
Default menu → main menu → multiple-screen→
output MAIN
output A
output B
output C
→Picture in picture mode→open

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Tip：After the multiple-screen is turned on, the fast cut and fade in and out functions are not
(2) Input signal source setting, the main channel of the processor and the picture-in-picture
channel. The same type of input signal source cannot realize the picture-in-picture function, so the
user can refer to the picture-in-picture input source conflict table in the table below.
Default menu → main menu → multiple-screen → picture-in-picture mode → input signal
PIP input source conflict table
CV
1
CV
2
VG
A1
VG
A2
D
VI
1
DV
I2
HD
MI
1
HD
MI2
SDI
p
I
p
c
h
a
n
n
e
l
CV
1
√
×
√
√
√
√
√
√
√
CV
2
×
√
√
√
√
√
√
√
√
CV
3
×
×
√
√
√
√
√
√
√
CV
4
×
×
√
√
√
√
√
√
√
VG
A1
√
√
√
×
√
√
√
√
√
VG
A2
√
√
×
√
√
√
√
√
√
DV
I1
√
√
√
√
√
×
√
√
√
DV
I2
√
√
√
√
×
√
√
√
√
P
I
P
ch
an
ne
l
HD
MI
1
√
√
√
√
√
√
√
×
√
HD
MI
2
√
√
√
√
√
√
×
√
√
HD
MI
3
√
√
√
√
√
√
×
×
√
HD
MI
4
√
√
√
√
√
√
×
×
√

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SD
I
√
√
√
√
√
√
√
√
√
(2) Size and position parameter settings, specific parameters are set by the user, the user can also
adjust the border, transparency and so on.
Default menu → main menu → multiple-screen → enter MAIN → picture-in-picture mode →
picture-in-picture parameters → horizontal start
Default Menu → Main Menu → PIP → Input A → PIP Mode → PIP Parameters → Vertical Start
Default Menu → Main Menu → PIP → Input B → PIP Mode → PIP Parameters → Horizontal
Width
Default Menu → Main Menu → PIP → Input C → PIP Mode → PIP Parameters → Vertical
Height
10. Color key map (only suitable for input signals in MAIN)
The image is an extension of the PIP function, which is achieved by subtracting the red, green,
blue, black, and white colors of the image input from the PIP channel. The keying function can be
used for some simple special effects processing and superimposed subtitles. The setup is easy,
please refer to the setup example.
For example, FIG. 11A is a picture-in-picture channel, the played video is a PPT, FIG. 11B is a
main input channel, and FIG. 11C is a cutout effect.
Page11A-PPT for picture-in-picture channel 11B-Main input channel diagram 11C-Keying effect
The setup steps in the main menu:
Default menu → main menu → multiple-screen → picture-in-picture mode → key image
Default menu→Main Menu→multiple-screen→Video→Input Source→DVI1
Default menu → main menu → multiple-screen → key image → color key → black
11. The preset scene save call has 8 groups of presets.
The preset mode is convenient for the user to quickly call out various commonly used application
scenarios during use, which reduces the complicated setting of the user during operation and
improves work efficiency. Each preset mode includes various parameters such as signal channel
mode, display mode, and image quality setting. The processor provides 8 sets of preset save
spaces. The following describes the save and recall operations of the preset modes.
12. Save the current preset scene
After the user adjusts all the parameters, you need to enter the save current preset scene, as
follows:
Default Menu → Main Menu → Functions → Presets → Save Template → Preset [1] →
Confirm
In the sub-menu of the save mode, there are presets [1] to presets [8], and 8 storage spaces can be

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selected by the user. When the storage space is empty, the right status is displayed as ☆, and
when the parameter is stored, the right status is displayed as ★. Users can also save overwrites.
13. Bring up the preset scene
There are two modes of operation for calling up preset parameters, shortcut key calls and menu
calls.
Method 1: Use the buttons in 1, 2, 3, 4, 5, 6, 7, and 8of PRESET to directly press the call
operation.
Method 2: Use the menu to call the preset scene.
Default menu→ Main Menu→ Features→ Presets→ Read Templates→ Presets [1]
→Confirm
14. Use of the key lock
The key lock function is for the user to avoid misuse or misuse by others in a complicated
environment, resulting in on-site errors. Improve the success rate of the show.
Lock key
Open the lock function in the system menu
Default menu → main menu → function → button lock → open
Unlock
Press the button for 2 seconds and the processor will automatically unlock.
15. VGA input image correction
In general, when switching to a VGA input source, the processor automatically corrects the color,
image size, and position of the input source. If the processor does not have automatic correction
successful, the user can implement manual correction.
Method 1: Use the AUTO button to adjust (the AUTO function multiplexes the VGA1 button and
the VGA2 button)
When the input source is switched to the VGA1 input, press the VGA1 button again and the
system will correct the input source by itself. When the input is VGA2, the operation is the same.
Method 2: Use menu correction
Enter the menu when switching to VGA input
Default Menu → Main Menu → System → VGA Settings → Auto Correction
If the automatic calibration is not successful, the user can try to manually correct
Default Menu → Main Menu → System → VGA Settings → Horizontal Position
Default Menu → Main Menu → System → VGA Settings → Vertical Position
Default menu→ Main Menu→ System→ VGA Settings→ Horizontal Clock
Default Menu → Main Menu → System → VGA Settings → Clock Phase
Tip：When there is no VGA signal input, the system prompts that it cannot be corrected. When VGA1 and VGA2 are
used simultaneously, it is recommended that users set different output resolutions.