J-Tech Digital JTECH-VWM90 User manual

5 Input | 3x3 video wall w/ rotation
JTD-2921 | JTECH-VWM90
USER MANUAL
J-TECH DIGITAL INC.
9807 EMILY LANE
STAFFORD, TX 77477
TEL: [phone]
E-MAIL: [email protected]

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Table of Contents
1. Product Overview..................................................................................... 3
1.1 Product Features......................................................................................................... 3
1.2 Specifications............................................................................................................. 3
2. Operation Instructions.............................................................................. 4
2.1 Product Panel Description ........................................................................................... 4
2.2 Remote Control Button Guide ...................................................................................... 7
2.3 Remote Control Operation Instructions........................................................................ 10
2.4 RS232 Control (Serial Port Instructions)..................................................................... 11
2.5 Description of Serial Port Instruction set..................................................................... 11
3. Product Connection Diagram................................................................... 13
3.1 Instructions for a single unit ...................................................................................... 13
3.2 Instructions for cascading two units ........................................................................... 14
3.3 Instructions for cascading three units ......................................................................... 15
3.4 Definition of Rows and Columns................................................................................. 16
4. Supported Resolutions .......................................................................... 16
5. Common Problems................................................................................ 18
6. Appendix ............................................................................................. 19
7. Product Service .................................................................................... 20
8. Warranty.............................................................................................. 20
9. Mail-In Service..................................................................................... 20
10. Limited Warranty Limits and Exclusions ................................................. 21
11. Extended Warranty............................................................................... 21

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1. Product Overview
1.1 Product Features
JTECH-VWM90 is an Ultra-HD Rotary Splicer Video Wall controller by J-Tech Digital. It supports 4
HDMI inputs (1 HDMI Port supports 4K@60Hz, 3 HDMI Ports support 4K@30Hz), 1 DP input
(4K@60Hz), 9 HDMI outputs (1080P@60Hz), and 1 DP local loop out. There is support for multiple
splicing modes, such as horizontal screen, vertical screen, 2x2, and the unit supports large-scale
cascading and parallel use in form of loop-out. The unit can open 4 windows on the whole screen at
once, and support multiple window-opening modes such as, single screen, PIP double screen, double
screen, and 4 picture segmentation.
The inputs support full screen rotation of 90° (only supported in single-picture mode), and the
output supports 180° rotation of the first line (only supported when the stitching mode is two lines).
The input source doesn’t need to be compressed, and there is no stretching or deformation ensuring
that the picture is clear.
The unit utilizes low power consumption and is energy saving. Conductive heat dissipation is used
internally without any external heat dissipating measures making the reliability of the unit extremely
high.
JTECH-VWM90 utilizes 40nm high-end programmable FPGA chip, full hardware real-time processing
architecture resulting in ultra-fast processing speed without delay.
1.2 Specifications
Product Name
JTECH-VWM90
Input Max. Pixel FPS
600MHz
Input Max. Resolution
3840*2160@60hz
DP Port Count & Version
1 Port Display Port 1.2
HDMI Input Port Count & Version
1 Port HDMI 2.0 | 3 Ports HDMI 1.4
Output Max. Pixel FPS
165MHz
Output Max. Resolution
1920*1080@60Hz
HDMI Output Port Count & Version
9 Ports HDMI 1.4
Loop-out Port & Version
1 Port Display Port 1.2

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Audio Output
3.5mm Headphone
Control Method
Remote Control, RS232 Serial Port (Can be
looped out)
Factory Default Resolution
HDMI: 3840*2160@60Hz
DP: 3840*2160@60Hz
Custom Resolution Support
Yes
Default IP Address
192.168.1.192
Default WebGUI Password
admin1
Operating Temperature
0°C –50°C | 32°F –122°F
Power Consumption
12W
Power Supply
12V@2A AC-DC
Weight
1.85lbs
Size
270mm * 122.5mm * 20mm
10.63” * 4.82” * 0.79”
Included Accessories
1 x DP Cable | 1 x Power Adapter | 1 x
Remote Control
Warranty
One Year
2. Operation Instructions
2.1 Product Panel Description

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A. RS232 Control Loop Out –Used in cascade mode to loop out RS232 commands to the next
device
B. Network Interface –TCP network protocol used for control system to issue instruction to control
the device (Default IP Address: 192.168.1.192 | Default Web Login Password: admin1)
C. RS232 Input –Used to issue RS232 commands to the device
D. DIP Switch (Board ID) –Indicates the ID of the current device in cascade mode. For detailed
settings, see Note 1 below
E. IR Port –Used for receiving remote control signals. Needs external IR receiver
F, G, H, I –4 HDMI input ports. Input Port “I”supports 4K@60Hz maximum resolution, while ports
“F/G/H”support maximum 4K@30Hz. The LED lights next to each HDMI interface indicates an
active signal input
J. 1 DP input interface. Supports 4K@60Hz
K. 3.5mm Audio out interface for external audio devices
L. DP local loop-out. When multiple devices are cascaded, this port acts as the DP input source for
other JTECH-VWM90 devices. The LED light next to this interface indicates that there is a loop-out
signal output
(In single screen mode, the loop-out follows the selection of the input source channel to switch. In
non-single screen mode, only the loop-out DP signal is supported)
M. Power switch
JTECH-VWM90 –rear panel
N. Power Interface –Connect to the provided 12V@2A AC-DC power supply. LED indicator next to
the interface is an indicator of the device receiving power
O - W. 9 HDMI output ports. The LED lights next to each HDMI interface indicates an active output
signal

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Note 1: DIP switch, when cascading, will indicated the ID number of the current device which is set
in binary.

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2.2 Remote Control Button Guide

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Ent
Confirm Key
Esc
Escape Key
Row
Set Splicing Mode: Row (Range 1-16)
Col
Set Splicing Mode: Column (Range 1-16)
Win
Window: The number of each screen (window)
in “whole screen”. See Note 2 at the end of
this table for details
Src
Source: Enter the number of the source, 1 for
HDMI, 2 for DP
+
Cooperation【↔↕ Zoom] to realize the
function of "move left / right / zoom in / zoom
out" of small window in picture
-
Cooperation【↔↕ Zoom] to realize the
function of "move left / right / zoom in / zoom
out" of small window in picture
↔↕ zoom
Picture in picture
Menu to move small window left & right
Menu to move small window up & down
Menu to zoom in & out for the small window
Four Pictures (Select the input source
displayed on the screen through the [Win /
Src] button
Double Screen: Left & Right →up & down
(Select the input source displayed on the
screen through the [Win / Src] button
Single screen rotation
HDMI 1 →HDMI 2 →HDMI 3 --< HDMI 4 →
DP
R90°
Rotate the whole input image 90 ° (only in
the case of single image)
R180°
First line output image rotated 180 ° (only in
case of 2 lines)
Clone
Clone mode: copy display (1x1) for each
output port

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Note 2: [Win] key meaning: The number of each screen (window) in the “whole screen”, the
corresponding position is as follows:
Single Screen Mode: There is only one screen, and the value is fixed as number 1, as shown below:
Double Picture (PIP Mode): The face value of the large picture is No.1, and the value of the small picture is
No. 2 as shown below:
Double Picture (Left Right Mode): The left screen value is No.1, and the right screen value is No.2 as shown
below:
Double Picture (Up Down Mode): The upper screen value is No.1, and the lower screen value is No. 2 as
shown below:
A
A
B
A
B
A
B

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Four Screen Mode: The value of the upper left screen is No. 1. The value of the lower left screen is No.2. The
value of the upper right screen is No. 3. The value of the lower right screen is No.4, as shown below:
2.3 Remote Control Operation Instructions
The adjustment of the following two groups of parameters needs to press the [Ent] confirmation key
to take effect, and the [Esc] cancel key can be pressed when the parameter setting needs to be
cancelled.
1. [ROW, COL] is a group to adjust the output splicing mode. You can confirm the value by viewing
the OSD display information in the upper left corner of the whole screen. For example: if you need to
adjust to 2x3 (two rows and three columns) splicing mode, you need to set [row] to 2, and [COL] to
3. Press [Ent] to confirm, and then the splicing mode will be changed to 2x3.
2. [Src, Win] is a group. The purpose is to arbitrarily specify the input source channel of each screen
(window) in the "whole screen". You can confirm the value by viewing the OSD display information in
the "upper left corner of the whole screen".
For example: Currently, it is [ ] PIP mode,HDMI is displayed in large screen window and DP is
displayed in small screen window by default.If you need to adjust the large screen window to DP and
the small screen window to HDMI,Then you need to set [Win] to “1”(window No. 1 means large
screen window), [Src] is “2” (2 means DP input)，After pressing the [Ent] confirmation key，The
large screen window can be switched to DP signal source.Set【Win】to “2”（window No. 1 means
small screen window），set【Src】to “1”（2 means HDMI input），After pressing the [Ent]
confirmation key，The small screen window can be switched to HDMI signal source.

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2.4 RS232 Control (Serial Port Instructions)
Parameter Settings:
Baud Rate: 9600bps
Data Bit: 8 bits
Stop Bit: 1 bit
Parity: None
Function
Byte 1
cmd head
Byte 2
cmd type
Byte 3
cmd_data1
Byte 4
cmd_data2
Byte 5
Check_sum
Splicing Mode
0x66
0x01
Row
Col
Byte 1 + Byte 2 + Byte
3 + Byte 4
Rotate 90°
0x66
0x02
Rotate90
0x00
Byte 1 + Byte 2 + Byte
3 + Byte 4
Rotate 180°
0x66
0x03
Rotate180
0x00
Byte 1 + Byte 2 + Byte
3 + Byte 4
Multi-Picture Mode
0x66
0x04
Mode
0x00
Byte 1 + Byte 2 + Byte
3 + Byte 4
Multi-Picture Window
specifying input source
0x66
0x05
Window Sel
Source
Channel
Byte 1 + Byte 2 + Byte
3 + Byte 4
PIP small window
position
0x66
0x06
Position
0x00
Byte 1 + Byte 2 + Byte
3 + Byte 4
PIP small window size
0x66
0x07
Size
0x00
Byte 1 + Byte 2 + Byte
3 + Byte 4
2.5 Description of Serial Port Instruction set:
•[Row]: Stitching mode: row [Col]: Stitching mode: column
•[Rotate90]: Rotate 90°, 0: do not rotate, 1: rotate (only supported in single-screen mode)
•[Rotate180]: Rotate 180°, 0: do not rotate, 1: rotate (only supported in stitching mode
behavior 2)
•[Mode]: Multi-picture mode: 0: single screen, 1: around double screen, 2: four picture
segmentation, 3: PIP double screen, 4: double screen up and down

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•[WindowSel]: Window selection, the value depends on the setting of multi-screen mode:
[Mode]=0, WindowSel=0 (current screen)
[Mode]=1, WindowSel=0 (left picture), WindowSel=1 (right picture)
[Mode]=2, WindowSel=0 (upper left screen), WindowSel=1 (lower left screen)
WindowSel=2 (upper right screen), WindowSel=3 (lower right screen)
[Mode]=3, WindowSel=0 (large picture), WindowSel=1 (small picture)
[Mode]=4, WindowSel=0 (upper screen), WindowSel=1 (lower screen)
[SourceChannel]: Input source channel selection: 0 is HDM I, 1 is HDMI 2, 2 is HDMI 3,3
is HDMI 4,4 is DP 5.
•[Position]: Choose the position of the small window in the picture-in-picture mode: 0:
center, 1: upper left corner, 2: upper right corner, 3bottom left corner, 4: Bottom right
corner (only supported in PIP double screen mode)
•[Size]: Choose the size of the small window in the picture-in-picture mode: 0~10, the
larger the value, the larger the window supported in PIP double screen mode).

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3. Product Connection Diagram
3.1Instructions for a single unit
Taking 3x3 as an example: Front panel wiring diagram
The Board ID of the DIP switch on the front panel of the current device needs to be set at:

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3.2Instructions for cascading two units
Take the output 3x6 image as an example: front panel wiring diagram
When cascading, the board ID of the 1 / 2 front panel dial switch of the device needs to be set:

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Note: When the devices are cascaded, the image rank (MxN rank) must be the same.
3.3 Instructions for cascading three units
Take the output of 3x9 as an example:
When cascading, the board ID of the 1 / 2 / 3 front panel dial switch of the devices needs to be
set:

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3.2Definition of Rows and Columns
4. Supported Resolutions
Note: The support of equal scale mode and resolution is not limited to the following tables.
Table 1: Equal proportion mode supported by video card application
Mode
Full Screen Input
Resolution
Full Screen Output
Resolution
Single Screen
Resolution
1x2
3840x1080@30Hz
3840x1080@60Hz
1920x1080@60Hz
1x3
3840x720@30Hz
5760x1080@60Hz
1920x1080@60Hz
1x4
3840x540@60Hz
7680x1080@60Hz
1920x1080@60Hz
1x5
3840x432@60Hz
9600x1080@60Hz
1920x1080@60Hz
1x6
3840x360@60Hz
11520x1080@60Hz
1920x1080@60Hz
2x1
1920x2160@30Hz
1920x2160@60Hz
1920x1080@60Hz
2x2
3840x2160@30Hz
3840x2160@60Hz
1920x1080@60Hz
2x3
3840x1440@30Hz
5760x2160@60Hz
1920x1080@60Hz
2x4
4096x1152@30Hz
7680x2160@60Hz
1280x720@60Hz
3x1
1920x3240@30Hz
1920x3240@60Hz
1920x1080@60Hz

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3x2
2816x2376@30Hz
3840x3240@60Hz
1920x1080@60Hz
3x3
3840x2160@30Hz
3840x2160@60Hz
1280x720@60Hz
4x1
1776x3996@30Hz
1920x4320@60Hz
1920x1080@60Hz
4x2
2560x2880@30Hz
2560x2880@60Hz
1280x720@60Hz
5x1
1408x3960@30Hz
1920x5400@60Hz
1920x1080@60Hz
6x1
1184x3996@30Hz
1920x6480@60Hz
1920x1080@60Hz
7x1
992x3906@30Hz
1280x5040@60Hz
1280x720@60Hz
8x1
880x3960@30Hz
1280x5760@60Hz
1280x720@60Hz
9x1
784x3969@30Hz
1280x6480@60Hz
1280x720@60Hz
Table 2: JTECH-VWM90 Cascade Mode-Supported Resolution Summary
Mode
Full Screen Input
Resolution
Full Screen Output
Resolution
Single Screen
Resolution
2x5
4080x918@30Hz
6440x1440@60Hz
1280x720@60Hz
2x6
4080x765@30Hz
7680x1440@60Hz
1280x720@60Hz
2x8
4096x576@30Hz
10240x1440@60Hz
1280x720@60Hz
2x10
4032x504@30Hz
12800x1440@60Hz
1280x720@60Hz
2x12
4032x378@30Hz
15360x1440@60Hz
1280x720@60Hz
3x4
4096x1728@30Hz
5120x2160@60Hz
1280x720@60Hz
3x5
4080x1377@30Hz
6400x2160@60Hz
1280x720@60Hz
3x6
4032x1134@30Hz
7680x2160@60Hz
1280x720@60Hz
3x8
4096x864@30Hz
10240x2160@60Hz
1280x720@60Hz
4x4
4096x2304@30Hz
5120x2880@60Hz
1280x720@60Hz
4x5
4080x1836@30Hz
6400x2880@60Hz
1280x720@60Hz
4x6
4032x1512@30Hz
7680x2880@60Hz
1280x720@60Hz
5x2
2048x2880@30Hz
2560x3600@60Hz
1280x720@60Hz

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5x3
3024x2835@30Hz
3840x3600@60Hz
1280x720@60Hz
5x4
3008x2115@30Hz
5120x3600@60Hz
1280x720@60Hz
5x5
4080x2295@30Hz
6400x3600@60Hz
1280x720@60Hz
6x2
1920x3240@30Hz
2560x4320@60Hz
1280x720@60Hz
6x3
2640x2970@30Hz
3840x4320@60Hz
1280x720@60Hz
6x4
3072x2592@30Hz
5120x4320@60Hz
1280x720@60Hz
8x3
2160x3240@30Hz
3840x5760@60Hz
1280x720@60Hz
5. Common Problems
1. What is the output resolution of the loop-out interface?
If the loop-out interface of the first device outputs 3840x2160 resolution, the resolution of the
DP input signal of the second device is 3840x2160 resolution.
2. Sometimes, the dial code or remote-control switch does not respond.
Because the setup involves resolution switching, it takes a certain time (1s). If the display does
not meet expectations, it can be restored by power off again.
3. Is there a flash line in cascade mode?
Please use DP cable provided by the manufacturer to connect the cascaded DP port.
4. What is the order of the output screen?
Top to bottom, left to right.
5. There are errors in remote control when cascading. Some devices respond to the remote-
control commands normally, and some devices don’t.
It is recommended to put the equipment together when using remote control in cascade.
6. How to recover when an error occurs?
Press the clone key, then press the key. Return to [output copy mode, input single picture]
status. When the cascade device settings are synchronized, continue with other settings.
7. What is the default IP address and web login password?
The default IP address is 192.168.1.192 and the default web login password is admin1

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6. Appendix
When the image is not rotated, the output interface is first up and then down, first left and then
right. Please refer to the picture below showing 3x9 mode:
When the image is rotated 90°, the output interface is first up and then down, first left and then
right as shown below in 2x9 example:

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7. Product Service
1) Damage requiring service: The unit should be serviced by qualified service personnel if:
(a) The DC power supply cord or AC adapter has been damaged;
(b) Objects or liquids have gotten into the unit;
(c) The unit has been exposed to rain;
(d) The unit does not operate normally or exhibits a marked change in performance; (e) The unit
has been dropped or the cabinet damaged.
2) Servicing Personnel: Do not attempt to service the unit beyond that described in these
operating instructions. Refer all other servicing to authorized servicing personnel.
3) Replacement Parts: When parts need replacing, ensure that the servicer uses parts specified
by the manufacturer, or parts that have the same characteristics as the original parts.
Unauthorized substitutes may result in fire, electric shock, or other hazards.
4) Safety check: After repairs or service, ask the servicer to perform safety checks to confirm that
the unit is in proper working condition.
8. Warranty
If your product does not work properly because of a defect in materials of workmanship, our
company (referred to as “the warrantor”) will, for the length of the period indicated as below,
“Parts (1) Year, Labor (90) Days”, which starts with the date of original purchase (“Limited
Warranty period”), at its option either (a) repair your product with new or refurbished parts, or (b)
replace it with a new or a refurbished product. The decision to repair or replace will be made by
the warrantor.
During the “Labor” limited warranty period, there will be no charge for labor. During the “Parts”
warranty period, there will be no charge for parts. You must mail-in your product during the
warranty period. This Limited Warranty is extended only to the original purchaser and only covers
products purchased as new. A purchase receipt or other proof of original purchase date is
required for Limited Warranty service.
9. Mail-In Service
When shipping the unit, carefully pack and send it prepaid, adequately insured, and preferably in
the original carton. Include a letter detailing the complaint and provide a day time phone and/or
email address where you can be reached.