AV-Box VWC-46L Instruction manual

0
AV-BOX VWC-46L Quick User Guide
Technical support:
E-mail: [email protected]
Tel: [phone]
Skype: av-box.russia
Version: 1.1
av-box.ru
4 Channel 4K/60 video wall controller

1
Table of Contents
Disclaimer/Copyright statement.............................................................................................................. 1
Warranty/RMA and FCC/CE statement.................................................................................................... 2
Introduction……………………………………………………………………………....................................... 3
Feature........................................................................................................................................................ 3
Quick User Guide............................................................................................……................................... 4
Content in the packing box...................................................................................................................... 4
How to use IR Remote Controller............................................................................................................ 4
System Setup procedures........................................................................................................................ 5
1 Step 1 –Connecting The Inputs.........………………………………………….…................................. 5
2 Step 2 –Connecting the Outputs....................................................…………................................... 5
3 Step 3 –HDMI Loop Out for Multiple Units Connection and monitoring..........…………………... 6
4 Step 4 –System Connection and Power On.......………………………………………………………. 7
5 Step 5 –System setting: Box ID, RS232, Ethernet.......................................................................... 7
6 Step 6 –Input Source / Output Resolution Selection & LED Indicators.......…………………….... 8
7 Step 7 –Conventional Video Wall Settings..................................................................................... 10
7.1 [Zoom] –Split Source Image.................................................................................................. 10
7.2 [Pan] –Assign Image Position............................................................................................... 10
7.3 [Overlap] –Bezel Compensation and Position Alignment.................................................. 11
8 Bezel Compensation.......................................................................................................................... 11
9 Irregular / Asymmetric video wall setting......................................................................................... 12
9.1 Introduction.............................................................................................................................. 12
9.2 Wind-Mill Asymmetric Video Wall Setup Procedures.......................................................... 12
9.3 Square Asymmetric Video Wall Setup Procedures.............................................................. 15
10 Flexible Aspect Ratio Adjustment.................................................................................................... 18
11 Step 8 - Save System Settings through Remote Controller........................................................... 19
12 Load Profile Index through Remote Controller................................................................................ 19
13 Important Notice for Video Wall Settings........................................................................................ 19
14 Easy Settings in Multiple Unit Application...................................................................................... 20
14.1 Setup by Remote Controller................................................................................................... 20
14.2 Setup by Ethernet.................................................................................................................... 20
14.2.1 WebGui............................................................................................................................ 20
14.2.2 UHDWall Manager PC tool............................................................................................. 21
15 System Structure and Control.......................................................................................................... 22
15.1 System Structure: Group A & Group B................................................................................. 22
15.2 System Control........................................................................................................................ 22
15.3 OSD Command Execution in Group A & Group B................................................................ 23
15.4 EDID Setting............................................................................................................................. 24
15.5 HDMI vs. DVI Output Signal.................................................................................................... 24
15.6 System Standby and Automatically Turn Off output Signal................................................ 24

2
15.7 RS232 Setting........................................................................................................................... 24
15.8 Ethernet Setting (Please see more details in Section 14.2)................................................. 25
15.9 Change Background Color...................................................................................................... 25
16 Limitations in Image Flip and Rotation............................................................................................. 26
17 Limitation in Audio Output................................................................................................................ 26
18 Trouble Shooting................................................................................................................................ 26
19 Technical Support.............................................................................................................................. 27
20 Safety Precaution and Maintenance................................................................................................. 27
Specifications............................................................................................................................................. 28
Revision history......................................................................................................................................... 29
Disclaimer/Copyright Statement
Copyright 2018, AV-BOX. All Right Reserved
This information contained in this document is protected by copyright. All rights are reserved by AV-BOX.
AV-BOX reserves the right to modify this document without any obligation to notify any person or entity of such revision.
Copying, duplicating, selling, or otherwise distributing any part of this document without signing a non-disclosure agreement
with an authorized representative of AV-BOX is prohibited. AV-BOX makes no warranty for the use of its products and
bears no responsibility for any error of omission that may appear in this document.
Product names mentioned herein are used for identification purposes only and may be trademarks of their respective
companies. Limited Warranty and RMA statement
This device is designed and tested to the highest standards and backed by two years’ parts and labor warranty. Warranties
are effective upon the first delivery date to the end customer and are non-transferable. Warranty related repairs include
parts and labor, but do not include repair of faults resulting from user negligence, special modifications, abuse (mechanical
damage), shipping damage, and/or other unusual damages. The customer shall pay shipping charges when the unit is
returned for repair. Manufacturer will pay shipping charges for return shipments to customers.
Manufacturer does not assume responsibility for consequential damages, expenses or loss of revenue, inconvenience or
interruption in operation experienced by the customer. Warranty service shall not automatically extend the warranty period.
User can pay extension fee to extend the warranty period. Please contact us for more details. In the event that a product
needs to be returned for repair, inform manufacturer and ask for a Return Material Authorization number.
FCC/CE statement
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is
operated in a residential / commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the
user will be required to correct the interference at his own expense.

3
Introduction
AV-BOX VWC-46L is 4 channel 4k/60 fps Video Wall controller. It is simplified version of VWC-46 with 1x
HDMI 2.0 input, 1x HDMI 2.0 loop-out port for daisy chain connection and 4 synchronized HDMI outputs. Each
output has independent image rotation/flip, scaling, cropping and color adjustment to allow great freedom in creating
video wall with variable display scales and styles. Support pixel to pixel true 8k/4k video wall through 4x 4k input
sources and 4x units of VWC-46L.
It is pure hardware, standalone system and easy-of-use. All operations can be executed through IR remote
controller, USB, RS232 or Ethernet. No additional PC or appropriate software is required in the setup.
Features
Each unit consists of below I/O ports.
- Input: 1x HDMI 2.0b, HDCP: 2.2/1.4
- Output: 4x HDMI up to 1080P & WUXGA
- 1x HDMI 2.0 loop out port from adjacent HDMI input port for daisy chain connection.
Support up to 4096x2400@60Hz input source.
Inputs support HDCP 1.4/2.2. Outputs support HDMI 1.4.
Loop-through port for multiple units cascade in any scale display.
Cropping ZOOM range up to 15 and pixel base position alignment up to +_ 900 pixels in H&V directions for
flexible image capture, cropping, position alignment, bezel compensation & asymmetric video wall.
Set overlapped output up to 900 pixels for projector edge blending application.
Flexible aspect ratio adjustment in each edge up to +_ 900 pixels.
Independent Image color adjustment in each channel.
Independent image rotation and flip in each channel for variable landscape, portrait and irregular video wall.
Selectable output resolution and programmable EDID to optimize video quality.
Frame-Lock function to get perfect synchronization among output channels.
Support HDR 10 high dynamic range color input signal.
Easy setup via IR, USB, RS232 & Ethernet. No PC is required.
Ready for 24/7 working environment.

4
Quick User Guide
Content in the packing box
The VWC-46L Quad Channel Video Wall Controller
1x RC-400 IR Remote Controller with battery
1x IR Extending Receiver with 1.8m cable
1x AC Main Power Cord.
1x DC 12V Power Supply Unit
Mounting Rack with screw (Option)
Please download UHD Wall Manager PC Tool at www. av-box.ru
How to Use IR Remote Controller
IR remote controller has all the functions for the operation of VWC-46L.
IR receiver is on Front Panel. One 3.5ø mm audio connector for IR extender is located at Back Panel of
VWC-46L. 1.8m IR extension cable is equipped in the packing. User can add audio cable to extend the
distance up to more than 20 meters.
Audio connector for IR extender
System Information
Operation Channel selection
OSD Menu operation keypads
Output resolution selection
Power on/off
Profile recall shortcut key
Video Wall Menu shortcut key
Input source selection
Default at HDMI input,
no need to change it
Video Wall Overlap setting
shortcut key
System Reset shortcut key
Profile Save shortcut key
After press ALL key, system
will select all channels at the
same time to execute some
specific Menu functions
Activate OSD Menu, press 5 seconds
will execute OSD Lock function, press
another 5 seconds will unlock OSD

5
System Setup Procedures
1 Step 1 –Connecting The Inputs
Please connect signal source to HDMI input port. User can also apply DVI-D signal but required DVI to HDMI
adapter.
2 Step 2 –Connecting The Outputs
CH-1 to CH-4 HDMI Output
Connectors (Max. WUXGA)
HDMI Input source
connector
Raw signal Loop Out
from HDMI input source
No specific connection sequence is required. It
can be set by Video Wall [PAN] menu.

6
3 Step 3 –HDMI Loop Out for Multiple Unit Connection and monitoring
Loop out port provides the same raw signal from HDMI input. It supports up to 4k/2k @60Hz.
3.1
3.2
User can connect any Loop Out signal to any HDMI input port in the next processing module or other
devices.
User can connect up to10units of VWC-46L through daisy chain connection. The daisy chain connection
number is related to source resolution and the quality of HDMI connection cables—poor cable will have
less connection number and good cable can connect more units in daisy chain connection.
3.3 If Loop out port has not been used, user can use loop out port to connect with monitoring system in
control room to see the status of the video wall content.
Loop Out for raw signal
from HDMI input source

7
4 Step 4 –System Connection and Power On
4.1 Poor quality HDMI cable and signal source will affect the connection distance and may cause signal
noise.
4.2 To ensure all cables are connected correctly, it is recommended to use locking cables.
4.3
4.4
Complete video wall system should be connected to one power Distribution Box with proper grounding.
Power on the system after finishing all connections to avoid system damage by floating voltage among
devices.
When VWC-46L power is switched on, the booting time is about 19 seconds and the Input & Output
LEDs on front panel will stay “Lighted”for the channel with correct input source and output monitor
connections after finishing booting process.
5 Step 5 - System setting: Box ID, RS232, Ethernet
5.1
5.2
5.3
5.4
5.5
The system setting for Box ID, RS232 and Ethernet should be set through CH-1 or CH-2. Please make
sure to connect monitor to CH-1 or CH-2 to see the OSD and execute system setting.
User can connect VWC-46L directly from Ethernet. The default static IP address is 192.168.0.100. After
Ethernet connection, user can change the IP address, Box ID or RS232 for further operation.
When multiple units are used in the same environment, user can set different IP address or Box ID for
each unit so that user can do independent control to each AV-BOX without interference.
Box ID range is from #0 - #99. When user uses remote controller to control the system through OSD, the
maximum ID setting for remote controller is #0 - #9.
Remote Controller
User can control individual AV-BOX through below method when all boxes or IR extender
receivers are installed together.
Press 851 number key on remote controller will lock all other AV-BOX OSD menu except ID
#1 AV-BOX. User can see flashing LED on the Front Panel for the units with OSD locked.
Press 853 will only unlock ID # 3 AV-BOX for further OSD operation.
Press 850 will unlock all AV-BOX OSD menu. Remote controller can access to all AV-BOX
simultaneously.
5.6 RS232 setting
User can set RS232 baud rate between 9600 & 115200 for different controller system.
5.7 Ethernet
User can connect all AV-BOX and PC in one Ethernet (or WiFi) Router (or switch hub) LAN ports
and set at DHCP or different Static IP address for each Box. User can check IP address under
[Ethernet] menu. Then connect AV-BOX through Chrome or Explorer by IP address to open
WebGui for further operation.
UHDWall Manager PC tool is also provided to control each AV-BOX independently through USB or
Ethernet connection.

8
If user connects PC to the same Router and set Router with DHCP mode, PC can access to AV-
BOX directly. If PC is not connected with the same Router, user needs to set PC with the same
Domain Segment as AV-BOX for Ethernet connection.
Web Server function is also available, Please contact us for more details.
6 Step 6 - Input Source / Output Resolution selection & LED Indicators
VWC-46L has only one HDMI input port. System default input is HDMI. No need to change.
The output resolution selection will apply to two output channels at the same time. For instance, CH1 &
CH2 is at the same output setting. User can select CH-1 or CH-2 to do output resolution selection. Once
the resolution is selected, it will apply to both CH-1 & CH-2 outputs. The same output resolution setting
will be applied to CH-3/CH-4.
If Monitor is connected,
Green LED will light up
If Input Source is
connected, Green LED
will light up
Channel selection
Output resolution selection
Input Source selection
Default is HDMI input, no
need to change
RC-400
Power LED indicator.
Red: power connected, Green:
Power on, Flashing: OSD Lock

9
Output resolution list: 1920x1200, 1920x1080, 1280x720, 1360x768, 1280x800, 1024x768
User can select output resolution from remote controller. When press [OTH] key, it will show resolution of
1920x1200, 1280x720 and 1360x768 continuously. After release from keypad, the system will apply the
selected resolution to the selected output port.
User can also get into OSD menu to do output resolution settings: [Image Properties][ Output Mode]
Select output resolution
Input green LED will light up when each processing module has detected input signal.
Green LED will light up when VWC-46L has detected the monitor in each output.
Power LED:
Red: Power connected
Green: Power on
Red flashing at 1”interval: OSD lock through Menu key
Red flashing at 0.5”interval: Box ID lock through remote controller 85x ID # control key
All default output resolution is 60Hz, RGB 4:4:4 format and progressive. When input source is 50Hz, the
output will be also set at 50Hz to reduce the artifact in frame rate conversion.
Input resolution is determined by signal source. VWC-46L can support non-VESA standard input timing.
User can click [Info] key to get system information and see input / output signal resolution.

10
7 Step 7 –Conventional Video Wall Settings
Press [Video Wall] hotkey on Front Panel or Remote Controller to activate [Video Wall] menu. WebGui and
UHDWall Manager PC tool are available for Ethernet configuration.
7.1 [Zoom]
Use [Zoom] to split the display in horizontal and vertical directions. AV-BOX will cut the image
into different sections. Maximum split image is 15 in both horizontal and vertical directions.
uvw
u v w
x y z
{ | }
7.2 [Pan]
[Pan] will assign the location of each split image in the display in both horizontal and vertical directions.
Horizontal direction is counted from Left to Right and Vertical direction is counted from Top to Bottom.
In the case of 3x3 display, Pan settings are as below:
For 3x1 displays
Horizontal Zoom= 3, Vertical Zoom = 1
For 3x3 displays
Horizontal Zoom = 3, Vertical Zoom =3

11
u v w
x y z
{ | }
7.3 [Overlap] –Bezel Compensation and Position Alignment
[Overlap] adjustment changes the cropping area of the image so that image position in each monitor will
be shifted. It can compensate Bezel Size of the monitor and correct misalignment in monitor installation.
If overlap value is decreased, each monitor will crop less image area and cause [zoom in] (enlarged)
effect. If overlap value is increased, each monitor will crop more image area and cause [zoom out]
(shrunk) effect. User can also use this function to shift the whole image location for irregular video wall
and set overlap area for projector edge blending application.
Maximum [Overlap] adjustment value is 900 pixels in all directions.
User can see the image and select Edge to adjust [Overlap] value for Bezel compensation.
[Overlap] adjustment can also compensate the position mis-alignment while monitor installation.
User can reduce [Overlap] value to stretch the image outside video wall (some image will be
missing) or draw image inside video wall with Black blanking area at the edge through increase
[Overlap] value. This function can adjust the aspect ratio of the content to match required aspect
ratio of the video wall. Please see more details in [Flexible Aspect Ratio Adjustment] section.
8 Bezel Compensation
8.1 Video Wall [Overlap] function can adjust the cropping area resulting image position shift.
8.2 User can see the image and reduce [Overlap] value to enlarge the image to the center line between two
bezels and achieve monitor bezel compensation.
8.3 User can also calculate the pixels number for bezel compensation based on the video wall dimension
and bezel size. If the video wall active display area is 360cm in width and the input source is 3840, then
the pixel number for each centimeter is 3840/360=10.67 pixel/cm. If the bezel size is 12mm in one edge,
then user can decrease Overlap value 10.67*1.2=12.8 (13) pixels to do bezel compensation for that edge
(to enlarge the image 13 pixels at that edge).
8.4 User can apply the same method to correct the position mis-alignment in monitor installation or set image
position for irregular video wall.
For No.
w
monitor: For No.
z
monitor:
Horizontal Pan = 3 Horizontal Pan = 3
Vertical Pan = 1
Vertical Pan = 2

12
9 Irregular / Asymmetric Video Wall Settings
9.1 Introduction
Asymmetric video wall can be created by rotatingmonitor installation direction or position. User can
crop different area image for each monitor, rotate image direction and adjust image position through
VWC-46 to achieve it.
Note: Image flip and rotation are only available when input resolution is under 4k/2k @30Hz.
User can use monitors with different dimensions, bezel size and resolution as display devices. No
data base for monitor is required and it allows user to have installation position deviation. All of
these factors can be corrected by AV-BOX video wall settings.
VWC-46 can only rotate the image at 90/180/270 degrees. The monitors need to be installed at
landscape or portrait position. If users want to install monitor at other rotation angle, VWC-43
model should be used.
9.2 Wind-Mill Asymmetric Video Wall Setup Procedures
System connection
Below example is for 4 monitors only. User can apply the same setup procedures for up to 8
monitors from one VWC-46L.
Apply test pattern from signal source
Below test pattern should be applied as signal source for easy setup. Please download from below
website: http://av-box.ru/upload/iblock/1ac/1ac38afde24699744442c423812a7689.png
Monitor can be with different bezel size,
screen dimensions, and resolution.
All monitors can be installed at 90 / 180 /
270 degree display direction.
Each monitor can be connected with any
output port. (In this example, CH1TV1,
CH2TV2, CH3TV3, CH4TV4)
User can select any signal source to
display on video wall.

13
Split the content by [Zoom]
Set [Horizontal Zoom] = 2, [Vertical Zoom] = 2 in all channels.
If TV2 & TV3 dimension is small, user can set TV2 & TV3 [Horizontal Zoom]=4 and [Horizontal
Pan]: TV2=3, TV3=2, so that user can reduce the image position adjustment range.
Assign image location by [Pan]
Set [Horizontal Pan]: TV1=1, TV2=2, TV3=1, TV4=2
Set [Vertical Pan]: TV1=1, TV2=1, TV3=2, TV4=2
Image rotation
Use [Orientation] menu to
rotate images in TV2 and TV3
to display the same image
direction.
Test pattern downloaded from
AV-BOX website
Test pattern applied to
video wall
TV1
TV4
TV3
TV2

14
Set standard position as reference in horizontal and vertical directions
User should determine Horizontal & Vertical image sizes and reference position so that all
monitors have criteria for image position adjustment.
Usually, image display borders are the maximum active display borders in the video wall.
In the above example, the horizontal borders are decided by TV1 & TV4. Vertical borders are
decided by TV2 & TV3.
User can decide video wall display center through test pattern. It can be asymmetric.
Adjust image position by [Overlap] menu to finish video wall settings
After TV2 & TV3
image 90 degrees
rotation.
Before TV2 & TV3
image 90 degrees
rotation.
TV1
TV2
TV3
TV4
TV1
TV2
TV3
TV4
Max. video wall
display borders
Video wall
center line
1 [Overlap] is to change image capture
range.
2 Decrease value in Top Edge of TV1
will stretch top edge of TV1 to match
image position of TV2.
3 For TV2 adjustment, user needs to
adjust Overlap value based on the
actual image direction but not based on
OSD direction. In this example, user
needs to stretch Right Edge to match
TV4.

15
9.3 Square Asymmetric Video Wall Setup Procedures
Step 1: Video Wall settings for all channels
[Zoom]: H=2, V=2
[Pan]: TV1: H=1, V=1, TV2: H=2, V=1, TV3: H=1, V=2, TV4: H=2, V=2
Step 2: Apply Test Pattern and Rotate TV1 & TV4 images at 90 degrees
Original Image after applied test pattern Image after image rotation in TV1 & TV4
After decrease TV1
[Overlap] value at Top
Edge
After decrease TV2
[Overlap] value at Right
Edge
After decrease TV4
[Overlap] value at Bottom
Edge, then it is finished.
After decrease TV3
[Overlap] value at Left
Edge

16
Step 3: Determined image center, marked with paper tape.
Step 4: Set standard Position Reference in horizontal and vertical directions
TV1: increase [Overlap] value in Bottom Edge to move Horizontal center line up to video wall center
TV2: increase [Overlap] value in Left Edge to move Vertical center line right to video wall center.
TV3: increase [Overlap] value in Right Edge to move Vertical center line left to video wall center.
TV4: increase [Overlap] value in Top Edge to move Horizontal center line down to video wall center.
Step 5: Individual monitor position adjustment based on Horizontal and Vertical Position Reference
resulting from the previous step 4.
TV1: increase [Overlap] value in Left Edge and decrease [Overlap] value in Right Edge to align
Vertical lines to match TV3
TV1
TV2
TV3
TV4
TV2
TV1
TV3
TV4
Horizontal Position Reference is
determined by TV2 & TV3 and Vertical
Position Reference is determined by TV1
& TV4.
Once user can line up the image center
to Video wall center H&V lines, it can
serve as Position Reference lines.
Left figure shows the result after setting
Horizontal and Vertical Position
Reference (Move TV1 center line up, TV2
center line to Right, TV3 center line to
Left and TV4 center line down—please
see the arrow direction)

17
TV2: increase [Overlap] value in Top Edge and decrease [Overlap] value in Bottom Edge to align
Horizontal lines to match TV1
TV3: increase [Overlap] value in Bottom Edge and decrease [Overlap] value in Top Edge to align
Horizontal lines to match TV4
TV4: increase [Overlap] value in Right Edge and decrease [Overlap] value in Left Edge to align
Vertical lines to match TV2
Step 6: After final image position, all horizontal and vertical pattern can be matched together. The
setup procedure is finished.
Aspect Ratio and image distortion
If the source content aspect ratio is not 1:1 in this Video Wall setting, the final image will have
some distortion.
User can adjust source resolution and content aspect ratio to fix this issue
Set display EDID with 2160*2160 with same as the aspect ratio of Video Wall.
Use PC as signal source with 2160*2160 output resolution and apply content with 1:1
aspect ratio. Customized output resolution setting in PC may be required.
If source resolution and content doesn’t match the above conditions, user can adjust the display
aspect ratio in video wall settings to reduce image distortion but it may have below issues:
With some blanking area at some borders.
Display with full screen but some image will be stretched outside display borders and
can’t be seen.
If user wants to change video wall display image aspect ratio, user needs to adjust Position
Reference Line first. In this example, if user wants to stretch horizontal image, user needs to
adjust TV3 and TV2 horizontal scaling factor first, then to align TV1 and TV4 to match TV3 and
TV2 test pattern.
1st alignment to set
Position Reference
(Set center lines)
2nd alignment to finish
all position alignments

18
10 Flexible Aspect Ratio Adjustment
User can use Video Wall [Overlap] function to change the aspect ratio of the image with black borders or to
stretch the image in specific direction to compensate the aspect ratio difference between video wall and the
content. The Maximum adjustment range is 900 pixels in each edge.
1. If Video Wall [Zoom] is set to H=2 & V=2 or above, user can apply 4k/2k @60Hz input signal.
2. If the image is at portrait position or the Video Wall [Zoom] is set to H=1 & V=1, this function is only
available under input signal up to 4k/2k @30Hz.
Activate [Overlap] under [Video Wall] menu
1. User can select the channel and the edge
required for edge shift, then adjust
Overlap value to see aspect ratio change.
2. The image position shift range is +_900
pixels in each edge.

19
3. The adjustment range 900 pixels is calculated based on signal source resolution.
4. When user adjusts Overlap value in one monitor, it will also change the scaling factor. User needs to adjust
the Overlap value in other monitors in the video wall to let all monitors has the same scaling factor.
11 Step 8 –Save System Settings through Remote Controller
After finishing system settings, user can save the setting by OSD menu through [Menu]
[Options][Setting][Profile][Save][Index 1-5].
[Save] Profile will take effect for two channels only. User needs to Save CH-1 / CH-2, CH-3 / CH-4,
separately.
User can recall (load) the setting through IR remote controller.
Five different display settings can be saved to [Profile]. The data stored in Profile include EDID
setting, input source, output resolution, color settings and all user customized settings.
When user power off the system, VWC-46L will save user setting without loss even the setting is not
saved into Profile Index, unless someone to change the setting.
When system has been reset from OSD menu or update new Firmware, Profile data will still be kept
inside VWC-46L.
12 Load Profile Index through Remote controller
Press [Profile] shortcut keySelect number keys 1-5 to recall Index 1 –Index 5.
Profile Load will apply to two channels only. We will add a function to be functional in all channels..
13 Important notice for video wall settings
13.1 Image distortion and aspect ratio issues
If the content aspect ratio is different from video wall, it will cause image distortion. User can adjust aspect
ratio through [Overlap] settings. However, you will have two choices:
Full screen display but some content will be drawn outside border.
Draw the image into video wall and keep some blanking borders at some edges.
13.2 If the signal is from PC, user can set customized EDID in AV-BOX to let PC output the right output
resolution. Some PC may not follow AV-BOX EDID resolution and require customized output setting
from display card.