ALFAtron ALF-WUK4A User manual

ALF-WUK4A
Full 4K Switcher

ALFATRON ALF-WUK4A
Preface
Read this user manual carefully before using the product. Pictures are shown in this
manual for reference only. Different models and specifications are subject to real
product.
This manual is only for operation instruction, please contact the local distributor for
maintenance assistance. In the constant effort to improve the product, we reserve the
right to make function or parameter changes without notice or obligation.
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.

ALFATRON ALF-WUK4A
SAFETY PRECAUTIONS
To ensure the best performance 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.
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 adequate ventilation to avoid damage caused by
overheating.
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 the 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 this as normal electrical wastes.

ALFATRON ALF-WUK4A
Table of Content
1. Product Introduction....................................................................................................1
1.1 Features ............................................................................................................1
1.2 Package List......................................................................................................2
2. Technical Specification................................................................................................3
3. Panel Description........................................................................................................4
3.1 Front Panel ........................................................................................................4
3.2 Rear Panel.........................................................................................................5
4. System Connection.....................................................................................................6
4.1 Usage Precaution ..............................................................................................6
4.2 System Diagram ................................................................................................6
5. Source Button Control.................................................................................................7
5.1 Manual Switching ..............................................................................................7
5.2 Automatic Switching ..........................................................................................7
6. IR Remote Control ......................................................................................................8
7. RS232 Control ............................................................................................................9
7.1 RS232 Control Software....................................................................................9
7.2 RS232 Commands .......................................................................................... 11
7.2.1 Signal Switching ....................................................................................11
7.2.2 Source Device Control........................................................................... 11
7.2.3 Display Device Control ..........................................................................12
7.2.4 Audio Selection......................................................................................13
7.2.5 System Control ......................................................................................13
8. EDID Management ...................................................................................................14
8.1 Predefined EDID Setting..................................................................................14
8.2 User Defined EDID Setting..............................................................................15
9. ARC Mode ................................................................................................................16
10. Firmware Upgrade ..................................................................................................17
11. Panel Drawing ........................................................................................................17
12. Troubleshooting & Maintenance .............................................................................18
13. Customer Service ...................................................................................................19

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1. Product Introduction
The ALF-WUK4A is an ultrathin auto switcher with four HDMI video inputs and one
HDMI output. This switcher supports HDMI video resolution up to 4Kx2K@60Hz 4:4:4
HDR and multichannel audio. Except passing EDID information from the display, there
are multiple built-in EDID settings to simplify an installation. The switcher will de-embed
digital stereo audio to provide an analog audio source for an existing audio system. The
switcher also supports audio return channel (ARC) for transmitting audio back to HDMI
input port from the connected display.
In auto-switch mode, it switches to an HDMI input as soon as a new source is
connected. When the active input is removed, the switcher will select the first source on
the lowest numbered input. The switcher may also be controlled via RS232, IR with the
included remote, or from the source button on the front of the switcher.
1.1 Features
Switches any one of four HDMI inputs to one HDMI output.
Supports video resolution up to 4Kx2K@60Hz 4:4:4 HDR.
18Gbps high bandwidth.
Fully compliant with the HDMI 2.0 and HDCP2.2 specifications.
Supports audio return channel (ARC).
Advanced EDID management: multiple preset and user defined allowed.
Controllable via RS232 and IR.
Supports CEC.
Provides seven LEDs to indicate the current operating status and to assist
troubleshooting an installation.
Firmware upgrade by Micro-USB port.

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1.2 Package List
1x HDMI2.0 4x1 Switcher
2x Mounting Ears
4x Mounting Screws
4x Plastic Cushions
1x RS232 Cable (3.5mm to DB9)
1x IR Remote
1x IR Receiver
1x Power Adapter (5V DC 1A)
1x User Manual
Note: Please contact your distributor immediately if any damage or defect in the
components is found.

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2. Technical Specification
Video Input
Input
(4) HDMI
Input Connector
(4) Female type-A HDMI
HDMI Input Resolution Up to 4Kx2K@60Hz 4:4:4
HDMI Standard
2.0
HDCP Version 2.2
Video Output
Output
(1) HDMI
Output Connector
(1) Female type-A HDMI
HDMI Output Resolution Up to 4Kx2K@60Hz 4:4:4
HDMI Standard
2.0
HDCP Version 2.2
Audio
Output
(1) AUDIO
Output Connector
(1) 3.5mm mini stereo audio jack
Audio Format PCM
Audio Output Impedance
70 Ohms
Frequency Response 20Hz to 20kHz, ±3dB
Control
Control
(1) IR IN; (1) RS232
Control Connector
(2) 3.5mm mini jack
General
Bandwidth
18Gbps
Operation Temperature -10℃~ +55℃
Storage Temperature
-25
℃
~ +70
℃
Relative Humility
10%-90%
Power Supply
Input:100V~240V AC; Output: 5V DC 1A
Power Consumption 5W(Max)
Dimension (W*H*D)
194mm x 15mm x 81mm
Net Weight 324g
Note: Please adopt high-qualified HDMI cable fully compliant with HDMI2.0 for reliable transmission and
connection.

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3. Panel Description
3.1 Front Panel
①Auto/Source Button:
Press to switch to next input source.
Press and hold at least three seconds to switch between manual mode and
auto mode.
②Power LED: The LED illuminates red when power is applied.
③Audio Mode LED:
Illuminates green when de-embedding audio.
Illuminates yellow when in ARC mode.
④Switching Mode LED:
Illuminates green in manual switch mode.
Illuminates yellow in auto-switch mode.
⑤Input 1~4 LED: The LED illuminates green when there is HDMI input on the
corresponding channel.
FIRMWARE
AUTO
SOURCE AUDIO MODE 1234
123456

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3.2 Rear Panel
①IN 1~4: Four type-A female HDMI input ports to connect HDMI sources. The input 4
port supports ARC.
②OU T: Type-A female HDMI output port to connect HDMI display.
③AUDIO: 3.5mm mini jack for analog audio output.
④RS232: 3.5mm mini jack to connect control device (e.g. PC).
⑤IR IN: 3.5mm mini jack to connect the included IR remote.
⑥EDID: 4-pin DIP switch for EDID setting.
⑦DC 5V: DC port to connect a 5V DC AC power adapter.
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.
DC 5VEDID
IR INRS232AUDIOOUT
IN 1 IN 2 IN 3
1234567

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4. System Connection
4.1 Usage Precaution
Make sure all components and accessories are included before installation.
System should be installed in a clean environment with proper temperature and
humidity.
All of the power switches, plugs, sockets, and power cords should be insulated and
safe.
All devices should be connected before power on.
4.2 System Diagram
The following diagram illustrates typical input and output connections that can be
utilized with this switcher:
Game Console Laptop
STB
5 6 7
Receiver Remote
Central Control
System
Ray-Blu DVD
TV Speaker
HDMI:
Control:
Audio:
RS232:

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5. Source Button Control
5.1 Manual Switching
When the switcher is in manual switching mode, the Switching Mode LED will be green.
Press Auto/Source button to switch to the next input.
5.2 Automatic Switching
To enable automatic switching, press and hold the Auto/Source button for three
seconds. The Switching Mode LED will turn to yellow.
When in auto-switch mode, the switcher follows the rules in the certain circumstances:
New Input: Upon detecting a new input, the switcher will automatically select the
new source.
Reboot: Once power is restored to the switcher, if the last selected source is still
available, the switcher will still output this signal, otherwise, the switcher will switch
to the first available active input starting at HDMI Input 1.
Source Removed: When an active source is removed, the switcher will switch to the
first available active input starting at HDMI Input 1.

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6. IR Remote Control
Please connect an IR receiver to the IR input port; the IR remote is used for signal
switching and it can also be used to control source and display devices based on CEC
function.
Note:
Due to the HDMI input 4 port does not support CEC, the source device connected
to this port cannot be controlled by IR remote.
The source and display devices are required to support CEC when the IR remote is
used to control them.
INPUTS:
1~4: Select the corresponding input source.
MANUAL/AUTO: Switch Auto or manual mode.
SOURCE: Control the input source (e.g. DVD).
DISPLAY: Control the display (e.g. HDTV).

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7. RS232 Control
Connect the switcher to the control device (e.g. PC) with RS232 cable and set the
parameters in this manner, the control device can control this switcher by RS232
commands.
7.1 RS232 Control Software
Installation: Copy the control software file to the computer connected with this
switcher.
Uninstallation: Delete all the control software files in corresponding file path.
Basic Settings
First of all, please connect all input devices and output devices, then connect to
computer which has the RS232 control software installed
Below take the software CommWatch.exe as example.
Double-click the following icon:

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The interface of the control software is shown as below:
Please set the parameters of COM number, bound rate, data bit, stop bit and the parity
bit correctly, then the RS232 commands can be sent in Command Sending Area.
Baud rate: 9600;
Data bit: 8;
Stop bit: 1;
Parity bit: none.
Parameter configuration area
Monitoring area, indicates if
the command sent works.
Command sending area

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7.2 RS232 Commands
Note: All commands must be ended with “<CR><LF>”.
7.2.1 Signal Switching
Function
Command
Feedback Example
Switch to HDMI input 1. >>HDMI1 <<HDMI1
Switch to HDMI input 2. >>HDMI2 <<HDMI2
Switch to HDMI input 3. >>HDMI3 <<HDMI3
Switch to HDMI input 4. >>HDMI4 <<HDMI4
Enable auto-switching mode. >>AUTO <<AUTO Switch
Enable manual switching mode. >>MANUAL <<MANUAL Switch
7.2.2 Source Device Control
Note:
The input source device is required to support CEC.
Due to the HDMI input 4 port does not support CEC, the source device connected
to this port cannot be controlled by IR remote.
Function
Command
Feedback Example
Turn on the input source device,
e.g. Blue-ray DVD. >>SRCOn <<SRCOn
Turn off the input source device,
e.g. Blue-ray DVD. >>SRCOff <<SRCOff
Play >>SRCPlay <<SRCPlay
Pause >>SRCPause <<SRCPause
Stop >>SRCStop <<SRCStop
Fast Forward x1 >>SRCForward >>SRCForward
Fast Rewind x1 >>SRCBackward <<SRCBackward

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Next Section >>SRCSkipForward >>SRCSkipForward
Previous Section >>SRCSkipBackward <<SRCSkipBackward
Open the menu setting >>SRCMenu >>SRCMenu
Go back >>SRCBack >>SRCBack
Confirm (OK) >>SRCOk >>SRCOk
Exit >>SRCExit >>SRCExit
Up direction >>SRCUp >>SRCUp
Down direction >>SRCDown >>SRCDown
Left direction >>SRCLeft >>SRCLeft
Right direction >>SRCRight <<SRCRight
7.2.3 Display Device Control
Note:The display device is required to support CEC.
Function Command Feedback Example
Turn on the display device, e.g.
HDTV. >>TVOn >>TVOn
Turn off the display device, e.g.
HDTV. >>TVOff >>TVOff
Volume up. >>TVVOL+ >>TVVOL+
Volume down. >>TVVOL- >>TVVOL-
Mute. >>TVMUTE >>TVMUTE
Unmute <<TVUNMUTE <<TVUNMUTE

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7.2.4 Audio Selection
Function Command Feedback Example
Select ARC audio channel.
>>AUDExternal <<AUDExternal
Select the HDMI audio input
channel. >>AUDInternal >>AUDInternal
7.2.5 System Control
Function Command Feedback Example
System reset.
>>RESET >>RESET
Get system information. >>SYSInfo
<<AUDExternal
<< ALF-WUK4A
<< V1.0.0
<< --------
<<HDMI1
<<Auto Switch
<<AUDExternal
<<EDID0

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8. EDID Management
8.1 Predefined EDID Setting
The rear panel boasts a 4-pin DIP switch to set the predefined EDID. The ten types of
embedded EDID and their corresponding switch status are shown in the below list.
When in the lower
position, the switch
represents “ON”,
while putting the
switch in the up
position, it
represents “OFF”.
ID
Switch
Status Video Audio
0
0000
Pass though
Pass though
1 0001
1920x1080p@60Hz 4:4:4
RGB 8bit Stereo
2 0010 1920x1080p@60Hz 4:4:4
RGB 8bit High Definition
3 0011
1920x1080p@60Hz 4:4:4
RGB 12bit Stereo
4 0100 1920x1080p@60Hz 4:4:4
RGB 12bit High Definition
5 0101 3840x2160p@60Hz 4:2:0
RGB 8bit Stereo
6 0110
3840x2160p@60Hz 4:2:0
RGB 8bit High Definition
7 0111 3840x2160p@60Hz 4:4:4
RGB 10bit HDR Stereo
8 1000
3840x2160p@60Hz 4:4:4
RGB 10bit HDR High Definition
9 1001 1280x800@60Hz Stereo
10 1010 1920x1200@60Hz Stereo

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8.2 User Defined EDID Setting
Except directly invoking the embedded EDID, the specific EDID can be customized.
There are five EDID that can be customized following the below operations.
1) Rename the user defined EDID according the following format.
EC_xx_xxxx_xxx.bin
EC: Represents EDID.
xx: Represents EDID ID. It is 11~15.
xxxx: Represents the video parameter.
xxx: Represents the audio format.
Example: EC_11_720P_LPCM.bin
2) Power on the switcher, and then connect the switcher to the PC with USB cable.
The PC will automatically detect a U-disk named “BOOTDISK”.
3) Double-click the U-disk, a file named “READY.TXT” will be showed.
4) Copy the user defined EDID (such as EC_11_720P_LPCM.bin) to the
“BOOTDISK” U-disk.
5) Reopen the U-disk to check the filename “READY.TXT” which automatically
becomes “SUCCESS.TXT”, if yes, the user defined EDID was imported into the
switcher and saved as its corresponding EDID ID successfully.
6) Repeat the above third to fifth step to copy other user defined EDIDs to the
“BOOTDISK” U-disk.
7) Remove the USB cable, connect the adaptor to power on the switcher.
8) The new EDID also can be invoked via the 4-pin DIP switch directly. The EDID ID
and its corresponding switch status are shown in the below list.
ID Switch Status
11
1011
12 1100
13
1101
14 1110
15 1111

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9. ARC Mode
Audio Return Channel (ARC) allows audio from a display to pass “upstream” through
an HDMI cable to an audio processing device, such as an AV amplifier. When ARC
mode is active on the switcher, the ARC stream will pass to the active HDMI source
device if it can process the signal.
Only the HDMI input 4 port features ARC, when the display and AV amplifier support
ARC, the audio connection diagram is shown below:
DC 5V
EDIDIR IN
RS232
AUDIO
OUT
IN 1 IN 2 IN 3
Speaker
Speakers
Amplifier
TV
ARC AUDIO: