Safety precautions
To ensure 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 protrusion.
- Do not remove the housing of the device as opening or removing the housing may expose you to dangerous voltage or other hazards.
- Install the device in a place with sufficient 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.
Product Introduction
Thank you for choosing the PT-MA-HD42UHD 4x2 HDMI 2.0 presentation switcher with matrix outputs. The switcher consists of four HDMI inputs, two HDMI matrix outputs and full HDMI 2.0 support. The product offers SPDIF and 3.5mm output for dual HDMI OUT audio extraction and dual HDMI OUT ARC along with 4K to 1080p down-scaling functionality. The PT-MA-HD42UHD features a wide range of control flexibility via Web, RS232, IR and smart EDID management.
Features
- 4x2 HDMI presentation switcher with matrix outputs.
- HDMI 2.0b, 4K@60Hz 4:4:4 8bit, HDR 10, HDCP 2.2.
- 4K to 1080p down-scaling.
- SPDIF and 3.5mm output for dual HDMI OUT audio extraction and dual HDMI OUT ARC.
- RS232, IR and TCP/IP control.
- Smart EDID management.
Package List
- 1x PT-MA-HD42UHD
- 1 x Power Adapter (12V DC,1A)
- 2x Mounting Ears with 4 Screws
- 4x Plastic Cushions
- 1x IR Remote
- 1x IR Receiver
- 1x 3-pin Terminal Block
- 1x User Manual
Note: Please contact your distributor immediately if any damage or defect in the components is found.
Specification
| Video Input | |
|---|---|
| Video Input | (4) HDMI |
| Video Input Connector | (4) Type-A female HDMI |
| Video Input Video Resolution | Up to 4K@60Hz 4:4:4 8bit |
| HDMI Audio Format | Supports Dolby Atmos, Dolby TrueHD, Dolby Digital Plus, Dolby Digital, DTS-X, DTS-HD Master Audio, DTS 5.1, 2 - 8Ch PCM 32-192KHz 16-24 bits; 2 - 8Ch PCM 32-192kHz 16-24 bits. |
| HDMI Input Cable | 4K@60Hz 4:4:4 ≤ 3 meters, other ≤ 5 meters |
| Video Output | |
| Video Output | (2) HDMI |
| Video Output Connector | (2) Type-A Female HDMI |
| Video output Video Resolution | OUT A: Up to 4K@60Hz 4:4:4 8bit, HDR10, Dolby Vision, supports color space 4:2:2/4:2:0 to 4:4:4, 4K to 1080p down-scaling. OUT B: Up to 4K@60Hz 4:4:4 8bit, HDR, Dolby Vision |
| HDMI Output Cable | ≤ 5 meters |
| HDMI Version | Up to 2.0 |
| HDCP Version | Up to 2.2 |
| Digital SPDIF Audio Output | |
| Audio Output | (1) Digital SPDIF audio |
| Audio Output Connector | (1) Toslink connector |
| Output level | ±0.05dBFS |
| Frequency Response | 20Hz~20KHz, ±1dB |
| THD+N | < 0.05%, 20Hz~20KHz bandwidth, 1KHz sine at 0dBFS level (or max level) |
| SNR | > 90dB, 20Hz~20KHz bandwidth |
| Crosstalk isolation | < -70dB, 10KHz sine at 0dBFS level (or max level before clipping) |
| Noise Level | - 90dB |
| Unbalanced analog Audio Output | |
|---|---|
| Audio Output | (1) Unbalanced analog audio |
| Audio Output Connector | (1) 3.5mm jack |
| Frequency Response | 20Hz~20KHz, ±1dB |
| Max output level | 2.0Vrms ± 0.5dB. 2V=16dB headroom above-10dBV (316 mV) nominal consumer line level signal |
| THD+N | < 0.05%, 20Hz~20KHz bandwidth, 1KHz sine at 0dBFS level (or max level) |
| SNR | > 80dB, 20Hz~20KHz bandwidth |
| Crosstalk isolation | < -80dB, 10KHz sine at 0dBFS level (or max level before clipping) |
| L-R level deviation | < 0.05dB, 1KHz sine at 0dBFS level (or max level before clipping) |
| Output load capability | 1Kohm and higher (supports 10x paralleled 10Kohm loads) |
| Noise Level | -80dB |
| Control Part | |
|---|---|
| Control Port | (1) EDID Switch, (1) FW, (1) RS232, (1) IR IN, (1) TCP/IP |
| Control Connector | (1) 4-pin DIP Switch, (1) Micro-USB, (1) 3-pin terminal block, (1) 3.5mm jack, (1) RJ45 |
| General | |
|---|---|
| Bandwidth | 18Gbps |
| Operation Temperature | -5℃ ~ +55℃ |
| Storage Temperature | -25℃ ~ +70℃ |
| Relative Humidity | 10%-90% |
| External Power Supply | Input: AC 100~240V, 50/60Hz; Output: 12V DC 1A |
| Power Consumption | 7.5W (Max) |
| Dimension (W*H*D) | 200mm x 28.5mm x 100mm |
| Net Weight | 605g |
Front Panel
- ① Power LED: Illuminates solid red when the device is powered on.
- ② Out A:
- 1-4: Four HDMI input LEDs, one of which illuminates green to indicate which source is selected.
- Auto LED: Illuminates green in auto switching mode.
- Select/Auto/3s: Press the button repeatedly to cycle through the four video inputs. Press and hold the button for 3 seconds to enter or exit auto switching mode.
- ③ Out B:
- 1-4: Four HDMI input LEDs, one of which illuminates green to indicate which source is selected.
- Auto LED: Illuminates green in auto switching mode.
- Select/Auto/3s: Press the button repeatedly to cycle through the four video inputs. Press and hold the button for 3 seconds to enter or exit auto switching mode.
- ④ Audio Out:
- De-embedded: Two HDMI de-embedded audio source LEDs, one of which illuminates green to indicate output A or output B de-embedded audio source is selected for audio output.
- ARC: Two ARC audio source LEDs, one of which illuminates green to indicate output A or output B ARC audio source is selected for audio output.
- Select: Press the button to select audio source.
- ⑤ EDID: 4-pin DIP switch for EDID setting.
- ⑥ FW: Micro-USB port for firmware upgrade.
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Rear Panel
- ① Inputs 1~4: Connects to HDMI sources.
- ② Outputs (ARC) A~B: Connects to display devices. They supports ARC, and only the output A port supports color space 4:2:2/4:2:0 to 4:4:4 and 4K to 1080p down-scaling function for compatibility with more display devices.
- ③ Audio Out: Toslink connector and 3.5mm jack for audio output. There are four audio can be selected: output A de-embedded audio, output B de-embedded audio, output A ARC audio or output B ARC audio.
- ④ RS232: Connects to control device (e.g. PC) to control the switcher by sending RS232 commands.
- ⑤ IR EYE: Connects to IR receiver to control the switcher by the IR remote.
- ⑥ TCP/IP: Connects to the control device (e.g. PC) to control the switcher by Web.
- ⑦ DC 12V: DC connector for the power adapter connection.
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System Connection
The following diagram illustrates the typical input and output connection of the switcher:


ARC Connection:
Outputs (ARC) Inputs
DC 12V Tx Rx RS232 TCP/IP Down-Scaler Audio Out 1 2 3 4 A B IR EYE OUT A AUTO 3 4 OUT B AUTO 3 4 1 2 1 2 AUDIO A B Game Console Game Console Blu-ray Laptop 4K TV 4K TV 1080p TV Laptop Down-scale ARC Soundbar Centre Control System Remote IR Receiver HDMI: Audio: RS232: IR: TCP/IP:

Outputs (ARC) Inputs DC 12V Tx Rx RS232 TCP/IP Down-Scaler Audio Out 1 2 3 4 A B IR EYE Amplifier Blu-ray 4K TV 4K TV ARC ARC ARC ARC Soundbar HDMI: ARC Audio:
Auto Switching
Press and hold Select button at least 3 seconds at Out A block to enable auto switching mode for output A, and then the Auto LED will turns green.
Press and hold Select button at least 3 seconds at Out B block to enable auto switching mode for output B, and then the Auto LED will turns green.
When in auto switching mode, the switcher will switch according to the following rules:
- The switcher will switch to the first available active input starting at input 1 to 4.
- New input: The switcher will automatically select the new input once detecting a new input.
- Reboot: If power is restored to the switcher, it will automatically reconnect the input before powered off.
- Source removed: When an active source is removed, the switcher will switch to the first available active input starting at HDMI input 1.
- Detection method: TMDS or 5V (The default is 5V and it can be selected by RS232 commands).
- Press the Select button can switch to next input source, and the switcher doesn’t exit the auto switching mode.
Note: In auto switching mode, press and hold the Select button at least 3 seconds to enable manual switching mode, but the input source will not be switched.
EDID Setting
The Extended Display Identification Data (EDID) is used by the source device to match its video resolution with the connected display. The 4-pin DIP switch on the front panel can be used to set the EDID to a fixed value to ensure the compatibility in the video resolution.
The switch represents “0” when in the lower (OFF) position, and it represents “1” while putting the switch in the upper (ON) position. Switch 1~3 are used for built-in EDID setting, and switch 4 is used for mode setting. The DIP switch status and its corresponding setting are shown as below chart.
| Switch 1~3 Status | Video Resolution | Audio Format |
|---|---|---|
| 000 | Pass-through | Pass-through |
| 001 | 1920x1080@60Hz 8bit | Stereo |
| 010 | 3840x2160@30Hz 8bit | Stereo |
| 011 | 3840x2160@30Hz 8bit HDR | Stereo |
| 100 | 3840x2160@30Hz Deep Color HDR | PCM 5.1 |
| 101 | 3840x2160@60Hz 8bit | Stereo |
| 110 | 3840x2160@60Hz Deep Color HDR | PCM 5.1 |
| 111 | User-defined EDID |

| Switch 4 Status | Mode |
|---|---|
| 0 | Global Mode. |
| 1 | Out B Private Mode. |
EDID setting rules:
When switching one input to output A and output B, the switcher is used as a 1x2 splitter, the input source device obtains its EDID from the output display with priority output B>output A. If video switching fails in EDID pass-through mode, set the built-in EDID to 1080p.
- When the specifications of output A and output B display devices are same, set the EDID to Global Mode. When switch same input to output A and output B, because the supported resolution (4K@60Hz 4:4:4) of two outputs are same, the input source device will not reread the EDID of display device to ensure non-flash screen.
- When the specifications of output A and output B display devices are different, set the EDID to Out B Private Mode, and the Out A is in Pass-through mode. When switching the input source of output A to output B, because the input source device will first learn the EDID from output B, so the two output displays will flash before the image appears. When switching the input source of output B to the output A, because the input source device will first learn the EDID from output B, so the display device of output B doesnt flash, but the display device of output A will flash before the image appears.
IR Remote Control
Connect IR receiver to the IR EYE port, the switcher can be controlled by the following IR remote.
- 1-4: Press 1-4 button to select corresponding input source for OUT A. AUTO: Press the button to enable auto switching mode for OUT A.
- 1-4: Press 1-4 button to select corresponding input source for OUT B. AUTO: Press the button to enable auto switching mode for OUT B.
- De-embedded: Press A or B button to select output A or output B de-embedded audio for audio output. ARC: Press A or B button to select output A or output B ARC audio for audio output.
Web Control
The switcher can be controlled via TCP/IP. The default IP settings are:
IP Address: 192.168.0.178
Subnet Mask: 255.255.255.0
Type 192.168.0.178 in the internet browser, it will enter the below log-in webpage:
Username: admin
Password: admin
Type the user name and password, and then click Login to enter the below control tab.
- Matrix Switch: Select Input 1~4 for output A or output B to build matrix switching. Select AUTO to enable auto switching mode for output A or output B.
- Audio Out: Select output A de-embedded audio, output B de-embedded audio, output A ARC audio or output B ARC audio for Toslink and 3.5mm jack audio outputs.
RS232 Control
Connect the RS232 port to control device (e.g. PC) with RS232 cable. The switcher can be controlled by sending RS232 commands.
RS232 Control Software
Here take the software docklight as an example.
Installation
Please download the latest Software Version from the link below:
https://docklight.de/download/Docklight.zip
Then follow the installation wizard for installation on Windows 7 and 10. After the installation, Docklight can be run for the first time and should look like the below screen shot: Registration is not necessary unless you wish to save settings on exit, so unless you wish to register click on "OK" to close the window.

The next pop-up window can also be closed with "Continue". An empty project is enough to send and receive commands easily (The default setting is always “Start with a blank project / blank script“)

close this window.
Click “OK” to close this window.
Now you are in the main view, where commands are sent and feedback is received. The next step is to select the correct COM port of the PC. To do this, double-click on "COM1" in the corresponding setup window.
In the following window, select the drop-down menu labeled "Send / Receive on Comm Channel", select the appropriate COM port and then click on "OK" at the bottom right corner.
All other settings can be left at default for most applications, but refer to device RS232 settings to be sure.

Double click on “COM1” to change to the right COM port.
In order to be able to send commands, open communication with the device by clicking on "Play". (1) Then the keyboard function must be activated, so that commands can be written in the "communication window". (2) Finally enter the command, for example "50701%". This is then confirmed by pressing "Enter" to send. Any response from the connected device will appear in red. (3)
Select the right COM port.

RS232 Communication Command
Communication protocol: RS232 Communication Protocol
Baud rate: 9600 Data bit: 8 Stop bit: 1 Parity bit: none
Note: All commands needs to be ended with “”. In the commands, “[”and “]” are symbols for easy reading and do not need to be typed in actual operation. Type the command carefully, it is case-sensitive.
Click “Play” to open the communication. Enable the keyboard type in function. Command sending area. Monitoring area, indicates if the command sent works.
System Control Commands
| Command | Description | Command Example and Feedback |
|---|---|---|
| >SetPowerOn Dis | System standby. | <PowerOn False |
| >SetPowerOn En | System on. | <PowerOn True |
| >GetPowerOn | Get the system power status. | <PowerOn False |
| >GetFirmwareVersion | Get firmware version. | <V1.0.0 |
| >SetFactoryReset | Reset to factory default. | <FactoryReset_True |
| >SetReboot | System reboot. | <Reboot_True |
| >GetStatus | Get device status. | |
| >SetIpAddr XXX.XXX.XXX.XXX | Set static IP address to XXX.XXX.XXX.XXX | <IpAddr 192.168.0.178 |
| >GetIpAddr | Get IP address. | <IpAddr 192.168.0.178 |
| >SetRS232Baudrate [PARAM] | Set the baud rate of switcher to [PARAM]. [PARAM]=1~7. [PARAM] Baud Rate 1 115200 2 57600 3 38400 4 19200 5 9600 6 4800 6 2400 | >SetRS232Baudrate 5 <RS232Baudrate 9600 |
| >GetRS233Baudrate | Get the baud rate of switcher. | <RS232Baudrate 2400 |
| >SetKeyboardLock [PARAM] | Unlock/lock front panel buttons and IR remote buttons. [PARAM]=Dis, En Dis: Unlock; En: Lock | >SetKeyboardLock Dis <KeyboardLock False |
| Command | Description | Command Example and Feedback |
|---|---|---|
| >GetKeyboardLock | Get the buttons locking status. | <KeyboardLock True |
| >SetDhcp [PARAM] | Enable or disable DHCP. [PARAM]=En, Dis En: Enable DHCP, the switcher automatically get IP. Dis: Disable DHCP, Manually set the IP of switcher. After reset the switcher, the DHCP is enabled, and the switcher will automatically get IP again. | >SetDhcp En <Dhcp True |
| >GetDhcp | Get DHCP status. | <Dhcp True |
| >SetSubnetMask XXX.XXX.XXX.XXX | Set subnet mask to XXX.XXX.XXX.XXX. | <SubnetMask 255.255.255.0 |
| >GetSubnetMask | Get subnet mask. | <SubnetMask 255.255.255.0 |
| >SetGateWay XXX.XXX.XXX.XXX | Set gateway to XXX.XXX.XXX.XXX. | <GateWay 192.168.0.1 |
| >GetGateWay | Get gateway. | <GateWay 192.168.0.1 |
| >SetMacAddr XX:XX:XX:XX:XX:XX | Set the MAC address to XX:XX:XX:XX:XX:XX. | <MacAddr 1A:23:34:45:56:67 |
| >GetMacAddr | Get the MAC address. | <MacAddr 1A:23:34:45:56:67 |
Signal Switching Commands
| Command | Description | Command Example and Feedback |
|---|---|---|
| >SetAV [PARAM1] [PARAM2] | Switch HDMI input [PARAM2] to output [PARAM1]. [PARAM1]=A, B [PARAM2]=H1, H2, H3, H4 | >SetAV B H1 <AV OutB H1 |
| >GetAV | Get the input channel on output channel one by one. | <AV OutA H1 <AV OutB H1 |
| >SetAutoSwitch [PARAM1] [PARAM2] | Enable/disable the auto switching mode for the output A or output B. [PARAM1]=A,B [PARAM2]=En, Dis En: Enable auto switching mode. Dis: Disable auto switching mode. | >SetAutoSwitch B En <AutoSwitch OutB True |
| >GetAutoSwitch | Get the auto switching mode of output A and output B. | <AutoSwitch OutA False <AutoSwitch OutB True |
| >SetSignalDet [PARAM] | Set the signal auto detection method to [PARAM]. [PARAM]=5V, TMDS. The default detection method is 5V. | >SetSignalDet 5V <SignalDetMode 5V |
| >GetSignalDet | Get the signal auto detection method. | <SignalDetMode 5V |
| >SetDownScaler [PARAM] | Enable/disable down-scaling function of output A. [PARAM]=En, Dis En: Enable down-scaling function. Dis: Disable down-scaling function. | >SetDownScaler En <Downscale True |
| >GetDownScaler | Get the down-scaling function of output A. | <Downscale True |
EDID Setting Commands
| Command | Description | Command Example and Feedback |
|---|---|---|
| >SetUpdateEdid | Upload user-defined EDID. The EDID DIP switch should be set as “1111”. | <User EDID ready Please send EDID data within 10 seconds ... <UpdateEdid True |
Audio Setting Commands
| Command | Description | Command Example and Feedback |
|---|---|---|
| >SetAudioSrc [PARAM] | Set the audio source of analog audio and SPDIF audio. [PARAM]=1, 2, 3, 4 1: OUTA de-embedded 2: OUTB de-embedded 3: OUTA ARC 4: OUTB ARC | >SetAudioSrc 1 <AudioSrc OutA De-embedded |
| >SetSpdif [PARAM] | Mute/unmute the SPDIF audio output. [PARAM]=Mute, UnMute. | >SetSpdif Mute <Spdif Mute |
| >SetIis [PARAM] | Mute/unmute the analog audio output (3.5mm jack). [PARAM]=Mute, UnMute. | >SetIis UnMute <Iis UnMute |
| >GetAudioSta | Get audio status. | <AudioSrc OutA De-embedded <Iis UnMute <Spdif Mute |
Firmware Upgrade
Please follow the steps below to upgrade the firmware by the FW port on the front panel:
- Prepare the latest upgrade file (.bin) and rename it as FW_MERG.bin .
- Connect the switcher to the PC with USB to Micro USB cable, and then power on the switcher. The PC will automatically detect a U-disk named of BOOTDISK .
- Double-click the U-disk, a file named of READY.TXT would be showed.
- Directly copy the latest upgrade file (.bin) to the BOOTDISK U-disk.
- Reopen the U-disk to check the filename READY.TXT whether automatically becomes SUCCESS.TXT , if yes, the firmware was updated successfully, otherwise, the firmware updating is fail, the name of upgrade file (.bin) should be confirm again, and then follow the above steps to update again.
- Remove the USB to Micro USB cable after firmware upgrade, and reboot the switcher.
Legal & Compliance
Product identification
Model: PT-MA-HD42UHD – manual version 1.0
Warranty and liability
The manufacturer grants the full statutory warranty on all new devices. As the manufacturer has no influence on installation, the warranty only applies to the product itself. If you detect a fault or damage, please contact your dealer and provide your sales slip or invoice as proof of purchase.
The manufacturer is not liable for damage to persons or property caused by improper installation, operation or maintenance not described in this manual. Do not alter or modify the product or its accessories. Any use other than described in this manual is not permitted and voids warranty and guarantee.
Trademarks and disclaimer
Product model and logo are trademarks. All other company and product names mentioned are trademarks of their respective owners. All rights reserved. No part of this publication may be copied or reproduced without prior written permission. We reserve the right to make changes to the device, packaging or manual and accept no liability for misprints.
EU conformity
PureLink hereby declares that this product PureTools PT-MA-HD42UHD complies with Directives 1907/2006/EU und 2011/65/EU. PureLink GmbH hereby declares that this product PureTools PT-MA-HD42UHD complies with Directives 2014/30/EU and 2014/35/EU.
| Directive / Regulation |
|---|
| 1907/2006/EU |
| 2011/65/EU |
| 2014/30/EU |
| 2014/35/EU |
The full text of the EU Declaration of Conformity is available at: http://www.purelink.de/ce/4251364718353_CE.pdf
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.
Disposal of electrical and electronic equipment
WEEE reg. no.: DE 93847290
The crossed-out wheelie bin symbol on the product, packaging or in this manual means that electrical and electronic equipment must not be disposed of with household waste at the end of its life. Hand in old devices free of charge at a public collection point or return them to a distributor obliged to take them back. Remove batteries and lamps that can be removed without destroying the device before handing it in, and delete any personal data stored on the device. Details are regulated by national law. By returning old devices you help protect the environment.
Packaging
Dispose of packaging separately by material (paper/cardboard, plastics) via the local collection systems. Keep packaging material away from children – risk of suffocation. Packaging register LUCID: DE5958616449295.
