ALFAtron WUH4 User manual

Preface
Read this user manual carefully before using this product. Pictures shown in this manual
is for reference only, different model and specifications are subject to real product.
This manual is only for operation instruction only, not for any maintenance usage.
Please refer to the dealers for the latest details.
Trademarks
Product model and logo mentioned in this manual are trademarks of our company. Any
other trademarks mentioned in this manual are acknowledged as the properties of the
trademark owner. No part of this publication may be copied or reproduced without prior
written consent.
FCC Statement
This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference
to radio communications. It has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed
to provide reasonable protection against harmful interference in a commercial
installation.
Operation of this equipment in a residential area is likely to cause interference, in which
case the user, at their own expense, will be required to take whatever measures may be
necessary to correct the interference.
Any changes or modifications not expressly approved by the manufacture would void
the user’s authority to operate the equipment.

4K HDMI Switcher 4x1
SAFETY PRECAUTIONS
To insure the best from the product, please read all instructions carefully before using
the device. Save this manual for further reference.
Unpack the equipment carefully and save the original box and packing material for
possible future shipment
Follow basic safety precautions to reduce the risk of fire, electrical shock and injury
to persons.
Do not dismantle the housing or modify the module. It may result in electrical shock
or burn.
Using supplies or parts not meeting the products’ specifications may cause damage,
deterioration or malfunction.
Refer all servicing to qualified service personnel.
To prevent fire or shock hazard, do not expose the unit to rain, moisture or install this
product near water.
Do not put any heavy items on the extension cable in case of extrusion.
Do not remove the housing of the device as opening or removing housing may
expose you to dangerous voltage or other hazards.
Install the device in a place with fine ventilation to avoid damage caused by
overheat.
Keep the module away from liquids.
Spillage into the housing may result in fire, electrical shock, or equipment damage. If
an object or liquid falls or spills on to the housing, unplug the module immediately.
Do not twist or pull by force ends of the optical cable. It can cause malfunction.
Do not use liquid or aerosol cleaners to clean this unit. Always unplug the power to
the device before cleaning.
Unplug the power cord when left unused for a long period of time.
Information on disposal for scrapped devices: do not burn or mix with general
household waste, please treat them as normal electrical wastes.

4K HDMI Switcher 4x1
Contents
1. Introduction.................................................................................................................1
1.1 Introduction to 4K HDMI Switcher 4x1...............................................................1
1.2 Features ............................................................................................................1
1.3 Package List......................................................................................................1
2. Panel Description........................................................................................................3
2.1 Front Panel........................................................................................................3
2.2 Rear Panel.........................................................................................................4
3. System Connection.....................................................................................................4
3.1 Usage Precautions............................................................................................4
3.2 System Diagram................................................................................................4
3.3 Connection Procedures.....................................................................................5
3.4 ARC Solution.....................................................................................................5
3.5 Application.........................................................................................................6
4. System Control...........................................................................................................6
4.1 Front Panel Control ...........................................................................................6
4.2 IR Control ..........................................................................................................7
4.3 RS232 Control...................................................................................................7
4.3.1 Installation/uninstallation of RS232 Control Software..............................7
4.3.2 Basic Settings..........................................................................................8
4.3.3 RS232 Communication Commands ........................................................9
4.4 EDID Management..........................................................................................10
5. Firmware Upgrade....................................................................................................11
6. Specification..............................................................................................................12
6.1 Supported Input Video Formats.......................................................................13
7. Panel Drawing ..........................................................................................................14
8. Troubleshooting & Maintenance .................................................................................1
9. After-sales Service......................................................................................................2

4K HDMI Switcher 4x1
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1. Introduction
1.1 Introduction to 4K HDMI Switcher 4x1
4K HDMI Switcher 4x1 is a HDMI switcher accommodating 4 HDMI inputs.
Select any of the inputs by front panel button or IR Remote, the corresponding indicator
on the front panel will illuminate to show real-time I/O connection status. Compliance
with HDMI 1.4& HDCP1.4, 4K HDMI Switcher 4x1 can transmit un-compressed 4K (at
max) signal.
4K HDMI Switcher 4x1 boasts comprehensive audio capacities including PCM, Dolby
Digital, DTS, and DTS-HD. Besides, it provides an ARC audio output socket to transfer
ARC audio to ARC speakers like Yamaha.
Moreover, 4K HDMI Switcher 4x1 supports convenient online firmware update through
USB port.
1.2 Features
4 HDMI inputs
Support Hot-plug
Compliant with HDMI 1.4, capable to transmit 4K signal
High bandwidth: 10.2Gbps
HDCP1.4 compliant, support auto-detecting for input HDCP compliant status
Support EDID management, including 5 embedded EDID data, 10 (max)
user-definable EDID data, and EDID data automatically captured and copied
Intuitive indicators for power, switch mode, I/O connection status and audio output
signal
Convenient online firmware update
1.3 Package List
1 x 4K HDMI Switcher 4x1
2 x Mounting ears (separate from 4K HDMI Switcher 4x1)
4 x Screws
4 x Plastic cushions
1 x IR Receiver
1 x RS232 Cable
1 x IR Remote
1 x Power Adapter (DC 5V 1A)
1 x User Manual

4K HDMI Switcher 4x1
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Notes：Confirm all the accessories are included, if not, please contact the dealers.

4K HDMI Switcher 4x1
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2. Panel Description
2.1 Front Panel
No.
Name
Description
①
Power
Illuminate red once powered on
②
AUDIO
Bi-colored LED indicator for audio source
illuminate green when the audio is de-embedded from
HDMI signal
illuminate yellow when the audio is ARC
③
Mode
Bi-colored indicator for present switch mode
illuminate yellow when in auto-switch mode
Illuminate green in manual switch mode.
④
Input
Indicate the present input source, 4 in total, the indicator of the
present input source illuminate green
⑤
SOURCE/
AUTO
Used as video source selection button, press to switch
among the 4 inputs source circularly
Used as switch mode selection button, press and hold for 3
seconds or more to switch between auto-switch mode and
manual switch mode.
⑥
FIRMWARE
USB port, used for firmware update & powering
Note: Output HDCP compliant status depends on input signal. When the input signal is
with HDCP, then output signal is with HDCP and vice versa.

4K HDMI Switcher 4x1
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2.2 Rear Panel
No.
Name
Description
①
IN
HDMI input ports. 4 in total, connect with HDMI or DVI
source device such as DVD/ Blue-ray, supports input
signals up to 4k& 1080p 3D
ARC audio output ports, connect with ARC speakers
②
OUT
HDMI output port, connect to HDMI display
③
AUDIO
Audio output port, connect with speaker to repeat HDMI audio
signal or output ARC audio
④
RS232
Serial control port, connect with control device (e.g. a PC) to
control 4K HDMI Switcher 4x1
⑤
IR IN
Connect with IR receiver to collect infrade signal
⑥
EDID
4-pin EDID DIP switchers to set EDID data, “1”stands for “On”,
“0”stands for “Off”. Dial the switchers to change EDID data
refering to the explainations in 4.4 EDID Management.
⑦
DC 5V
Power port, plug a DC 5V power adapter into this port
Note: Pictures shown in this manual are for reference only; different model and
specifications are subject to real product.
3. System Connection
3.1 Usage Precautions
1) System should be installed in a clean environment
2) All of the power switches, plugs, sockets and power cords should be insulated and
safe.
3) All devices should be connected before power on.
3.2 System Diagram
The following diagram illustrates typical input and output connections that can be utilized
with 4K HDMI Switcher 4x1:

4K HDMI Switcher 4x1
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DVD HDTV
Speaker
PC
IR Remote
HDMI Signal ：
Audio Signal ：
IR Signal ：
Control Signal ：
Figure 3- 1 Connection Diagram
3.3 Connection Procedures
Step1.Connect HDMI/ DVI source device(s) (e.g. Blue-ray DVD) to the HDMI INPUT
ports of 4K HDMI Switcher 4x1 with HDMI cable.
Step2.Connect HDMI displays to HDMI OUTPUT ports of 4K HDMI Switcher 4x1 with
HDMI cable.
Step3.Connect an amplifier to the audio output.
Step4.Connect an IR Receiver to the IR IN to enable IR control.
Step5.Connect the control device (e.g. a PC) to the RS232 port to enable RS232
control.
Step6.Plug a DC 5V power adapter to the power port of 4K HDMI Switcher 4x1.
Note: All the ports support hot-plug.
3.4 ARC Solution
The ARC (Audio Return Channel) enables a display, via a single HDMI cable, to either
send or receive audio via HDMI, upstream or downstream, depending on system set-up
and user preferences, increasing user flexibility. Connect the devices abiding by the
following figure:

4K HDMI Switcher 4x1
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HDTV
Speaker
Speaker
ARC Audio：
Note: All utilized devices including the HDMI cable should support Audio Return
Channel functionality when connected to Audio Return Channel-enabled devices.
3.5 Application
4K HDMI Switcher 4x1 has a good application in various occasions, such as computer
realm, monitoring, conference room, big screen displaying, television education,
command & control center and smart house etc.
4. System Control
4.1 Front Panel Control
SOURCE/AUTO button on the front panel can be used to change input source and
switch mode.
Switch input source: Press the button to switch circularly among input 1~4, the
corresponding indicator illuminate green synchronously for easy recognition.
Change switch mode: Input signal supports auto-switch and manual switch. Press
and hold SOURCE/AUTO button for 3 seconds or more to switch between the two
modes. (Default: Manual switch.)
In auto-switch mode, source selection abides by the following principles:
New input principle
Once detecting a new input signal, 4K HDMI Switcher 4x1 switch to this new
signal automatically.
Power rebooting principle
Once rebooted, 4K HDMI Switcher 4x1 will automatically select input 1 as input
source even though there is no connection in input 1.
Signal removing principle
Once removed the current display signal, 4K HDMI Switcher 4x1 will detect all

4K HDMI Switcher 4x1
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input signals with priority from INPUT 1 to INPUT 4. It will transfer the first
available source to the output device.
In manual-switch mode, once rebooting, WUH4Awill output the source signal before
rebooting.
4.2 IR Control
Connect an IR receiver to the IR IN port; users can control the device via the included IR
remote. Here is a brief introduction to the IR remote:
4.3 RS232 Control
4K HDMI Switcher 4x1 provides with 1 3.5mm RS232 port for serial port control.
Connect 4K HDMI Switcher 4x1 to the control device (e.g. a PC) with RS232 cable and
set the parameters in the right manner, the control device is capable to control 4K HDMI
Switcher 4x1 via designed software.
4.3.1 Installation/uninstallation of RS232 Control Software
Installation: Copy the control software file to the computer connected with 4K HDMI
Switcher 4x1.
Uninstallation: Delete all the control software files in corresponding file path.
MENU:
Mute: press to switch on/offAudio&
Video output
Audio: switch between HDMI signal
and ARC audio
Source/Auto: share the same
function with SOURCE/AUTO button
on the front panel
INPUTS:
1~4: press to switch input source,
correspond to input 1~4 separately
Prev/ Next: switch to the previous/
next input source abiding by the
order 1~4

4K HDMI Switcher 4x1
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4.3.2 Basic Settings
Firstly, connect 4K HDMI Switcher 4x1 with an input device and an output device. Then,
connect it with a computer which is installed with RS232 control software. Double-click
the software icon to run this software.
Here we take the software CommWatch.exe as example. The icon is showed as below:
The interface of the control software is showed as below:
Please set the parameters of COM number, bound rate, data bit, stop bit and the parity
bit correctly, only then will you be able to send command in Command Sending Area.
Parameter
Configuration area
Monitoring area,
indicates whether
the command
sent works.
Command
Sending area
Parameter
Configuration area
Monitoring area,
indicates whether
the command
sent works.
Command
Sending area

4K HDMI Switcher 4x1
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4.3.3 RS232 Communication Commands
Baud rate: 9600; Data bit: 8; Stop bit: 1; Parity bit: none.
Command
Function
Feedback Example
[x]B1.
Switch audio and video signal of input
x synchronously, x=1~4
AV: x -> 1
0B0.
Switch off output
Mute On
0B2.
Switch on output
Mute Off
600%
Inquire operation status, including I/O
connection, switch mode, and ARC
mode
AV: x -> 1
Manual/ Auto Switch
Switch Device System/
Switch Device System
601%
Activate auto switch mode to detect all
input signals with priority from INPUT
1 to INPUT 4 and transfer the first
available signal to the output device.
Auto Switch
602%
Activate manual switch
Manual Switch
EDIDUpgrade
[x].
Upgrade EDID data via serial port, x
stands for the serial number of the
DIP switcher status
x=1~5, correspond to embedded
EDID 1~5 separately
x=6~15, correspond to the 10 custom
EDID
EDID Upgrade OK!
ARC [x]&
Switch on/off ARC audio output
x=1, switch on ARC audio output
x=0, switch off ARC audio output
Audio Return System (x=1)
Switch Device System (x=0)
Note:
1. In above commands, “[”and “]” are symbols for easy reading and do not need to be
typed in actual operation.
2. Type in the complete commands including ending symbol “.”.
3. Load the desired EDID file to the RS232 control software after sending command
EDIDUpgrade[x]. , it will show “EDIDUpgrade OK!”after the upgrade is completed.

4K HDMI Switcher 4x1
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4.4 EDID Management
4K HDMI Switcher 4x1 provides with convenient EDID management to create effective
communication between the display and sources.
In factory default status (Status: 0000), 4K HDMI Switcher 4x1 pass through the signals
directly, input& output device process the signal automatically. You can change the
EDID data by adjusting the 4-pin EDID DIP switcher.
Invoke EDID data:
Here is an introduction to the EDID data to be utilized:
Embedded EDID data: 5 sets in total, the chart below illustrates the 5 Embedded
EDID data:
No.
Switcher Status
(From right to left)
EDID information
1
0001
1080P 3D 2CH
2
0010
1080P 3D Muiltichannel
3
0011
1080P 2D 2CH
4
0100
1080P 2D Muiltichannel
5
0101
3840x2160 2D (30Hz)
Custom EDID data: max at 10 sets, custom EDID data (.bin) and program the data
into the device by sending command EDIDUpgrade[x]..
To get the corresponding switcher status of a serial number for EDID data, convert
the decimal number to binary one first. The chart below shows switcher status for
6~15 (serial numbers for custom EDID data):
No.
Switcher Status
No.
Switcher Status
6
0110
11
1011
7
0111
12
1100
8
1000
13
1101
9
1001
14
1110
10
1010
15
1111
EDID Copy: automatically capture the EDID data of the display and copy to input
devices

4K HDMI Switcher 4x1
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Upgrade EDID data:
EDID data supports upgrade via serial port. Follow these steps to upgrade EDID:
Send command to upgrade the saved EDID data one by one.
Step1.Copy the upgrade file (.bin) to PC.
Step2.Send command EDIDUpgrade[x]. Via the RS232 control software.
x is the serial number of EDID data
x=1~5, correspond to the 5 embedded EDID data listed on the above chart
separately;
x=6~15, correspond to the 10 custom EDID separately;
Step3.Click Load File and select the desired upgrade file (.bin). Press Send to start
upgrade.
It will return “EDID Upgrade OK!” when the upgrade finishes. Reboot the unit, users can
adjust the dip switchers on rear panel to invoke the upgraded EDID.
5. Firmware Upgrade
4K HDMI Switcher 4x1 boasts a USB port for online firmware upgrade on the front panel.
Follow these steps to upgrade firmware:
Step1.Copy the upgrade software and the latest upgrade file (.bin) to PC.
Step2.Connect the USB ports of 4K HDMI Switcher 4x1 and the PC via USB cable.
Step3.Double-click the update software icon (see as below).
It will enter the upgrade interface shown as below:
Step4.Click Connect USB.
Step5.Click Open to load the upgrade file, and then click Updata to start firmware
upgrading.
Note: 1. The USB port can also be used to energize the device.
2. The COM number connected with PC is available only when from 1 to 9.

4K HDMI Switcher 4x1
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6. Specification
Product Model
4K HDMI Switcher 4x1
HDMI Standard
HDMI 1.4, support HDMI Deep Color, full 3D & 4Kx2K@30Hz
HDCP
HDCP 1.4 compatible
Video Signal
Support VESA and SMPTE Video
480p/1024x768/720p//1280x800/1080p/3840x2160@30Hz
ARC
HDMI support ARC function
Bandwidth
10.2Gbps
IR Control
IR IN, DC 5V,connect to the IR receiver and receive the IR
signal of IR remote
Input
HDMI x 4
3.5mm(IR IN) x 1
Output
HDMI x 1
3.5mm(audio) x 1
Other Connector
RS232(3.5mm
) x 1
DIP(EDID for
4P) x 1
Power Connector x 1
HDMI Connector
Type A
3.5mm Connector
IR IN x1 / audio x 1 /RS232 x 1
Chassis Dimension
W194xH11.4xD80(mm), ultra thin
Raw Materials
Aluminum chassis
Weight
About 160g
Power Supply
DC 5V 1A
Consumption
4.2W
Temperature
﹣10 ～﹢40℃
Reference Humidity
10%-90%

4K HDMI Switcher 4x1
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6.1 Supported Input Video Formats
Note: 4K HDMI Switcher 4x1 supports 4k&1080p 3D HDMI signal, please adopt quality
HDMI cables compliant with HDMI1.4 for reliable transmission when connecting.
Video Format
Resolution
HDMI
480I
480P
576I
576P
720P
1080I
1080P
4Kx2K
DVI
640*480@60 hz
640*480@72 hz
640*480@75 hz
800*600@60 hz
800*600@72 hz
800*600@75 hz
1024x768@60Hz
1024x768@70Hz
1024x768@75Hz
1280x1024@60Hz
1280x1024@75Hz
1600x1200@60Hz
1920x1080@60Hz
1920x1200@60Hz

4K HDMI Switcher 4x1
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7. Panel Drawing

4K HDMI Switcher 4x1
8. Troubleshooting & Maintenance
Problems
Causes
Solutions
Color losing or no video
signal output in HDMI
display
The connecting cables may
not be connected correctly
or it may be broken.
Check whether the cables
are connected correctly
and in working condition.
No HDMI signal output in
4K HDMI Switcher 4x1
while local HDMI input is in
normal working state
Splash screen in output
devices
Poor quality of the
connecting cable
Change for another cable
of good quality.
Cannot control 4K HDMI
Switcher 4x1 by control
device (e.g. a PC) through
RS232 port
Wrong RS232
communication parameters
Make sure the RS232
communication parameters
are correct.
4K HDMI Switcher 4x1 is
broken
Send it to authorized
dealer for repairing.
Static becomes stronger
when connecting the video
connectors
Bad grounding
Check the grounding and
make sure it is connected
well.
If your problem persists after following the above troubleshooting steps, seek further
help from authorized dealer or our technical support.

4K HDMI Switcher 4x1
9. After-sales Service
If there appear some problems when running the device, please check and deal with the
problems reference to this user manual.
1) Product Limited Warranty: ALFATRON warrants that its products will be free from
defects in materials and workmanship for five years, which starts from the first day
the product leaves warehouse (check the SN mark on the product).
Proof of purchase in the form of a bill of sale or receipted invoice must be presented
to obtain warranty service.
2) What the warranty does not cover:
Warranty expiration.
Factory applied serial number has been altered or removed from the product.
Damage, deterioration or malfunction caused by:
Normal wear and tear
Use of supplies or parts not meeting our specifications
No certificate or invoice as the proof of warranty.
The product model showed on the warranty card does not match with the
model of the product for repairing or had been altered.
Damage caused by force majeure.
Servicing not authorized.
Other causes which does not relate to a product defect
Delivery, installation or labor charges for installation or setup of the product
3) Technical Support: Email to our after-sales department or make a call, please
inform us the following information about your cases.
Product version and name.
Detailed failure situations.
The formation of the cases.
.
Remarks: For any questions or problems, please try to get help from your local
distributor.
1. Limited warranty in respect of Alfatron Products Only
1.1 This limited warranty covers defects in materials and workmanship in this product.
1.2 Should warranty service be required, proof of purchase must be presented to the
Company. The serial number on the product must be clearly visible and not have been
tampered with in any way whatsoever.
1.3 This limited warranty does not cover any damage, deterioration or malfunction
resulting from any alteration, modification, improper or unreasonable use or
maintenance, misuse, abuse, accident, neglect, exposure to excess moisture, fire,
improper packing and shipping (such claims must be presented to the carrier), lightning,