PureTools PT-PMS-42S User manual

User Manual
PT-PMS-42S
User Manual
4x2 HDMI 2.0 Seamless Matrix Switcher
Model PT-PMS-42S
Designed in Germany
© 2019 PureLink GmbH All rights reserved. V1.0

User Manual
PT-PMS-42S
Preface
Read this user manual carefully before using this product. Pictures shown in this
manual are for reference only. Different model layouts and specifications are subject
to the physical product.
This manual is for operation instructions only, not for any maintenance usage.
In the constant effort to improve our product, we reserve the right to make changes in
functions or parameters without prior notice or obligation.
Trademarks
Product model and logo are trademarks. 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 the 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.

User Manual
PT-PMS-42S
REACH | 1907/2006/EU
ROHS | 2011/65/EU
PureLink hereby declares that this product PureTools PT-PMS-42S complies with
Directives 1907/2006/EU und 2011/65/EU.
EMC / LVD (Electro Magnetic Compatibility / Low Voltage Directive)
PureLink GmbH hereby declares that this product PureTools PT-PMS-42S complies
with Directives 2014/30/EU and 2014/35/EU. The full text of the EU Declaration of
Conformity is available at the following Internet address:
http://www.purelink.de/ce/4251364718216_CE.pdf

User Manual
PT-PMS-42S
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.

User Manual
PT-PMS-42S
Table of Content
1. Product Introduction ..................................................................................................................1
1.1 Features ..............................................................................................................................1
1.2 Package List .......................................................................................................................2
2. Specification.................................................................................................................................3
2.1 Matrix Switcher................................................................................................................. 3
2.2 HDBaseT Receiver ............................................................................................................5
3. Panel Description........................................................................................................................7
3.1 Matrix Switcher Front Panel........................................................................................... 7
3.2 Matrix Switcher Rear Panel............................................................................................8
3.3 Receiver Front and Rear Panel ......................................................................................9
4. System Connection.................................................................................................................. 11
4.1 Usage Precaution............................................................................................................11
4.2 System Diagram..............................................................................................................11
4.3 RS232 Connection..........................................................................................................12
4.4 IR Connection ..................................................................................................................12
5. Button Control........................................................................................................................... 13
5.1 Manual Switching ...........................................................................................................13
5.2 Auto Switching................................................................................................................13
5.3 Switching Status Query.................................................................................................14
5.4 Resolution Selection .....................................................................................................14
5.5 Sound Volume Control..................................................................................................14
6. IR Remote Control.................................................................................................................... 15
7. GUI Control ................................................................................................................................ 16
7.1 Video Switching Tab ......................................................................................................17
7.2 Resolution Selection Tab..............................................................................................18
7.3 Audio Control Tab...........................................................................................................19
7.3.1 Audio Input.......................................................................................................... 19
7.3.2 Audio Output ...................................................................................................... 20

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7.4 Configuration Tab...........................................................................................................21
7.4.1 PoC Setting.......................................................................................................... 21
7.4.2 EDID Management............................................................................................. 22
7.5 CEC Control Tab ..............................................................................................................23
7.6 Tags Setting Tab..............................................................................................................26
7.7 RS232 Control Tab .........................................................................................................27
7.8 Network Setting Tab ......................................................................................................28
7.9 Security Setting Tab.......................................................................................................29
7.10 GUI Upgrade..................................................................................................................30
8. RS232 Control........................................................................................................................... 31
8.1 RS232 Control Software ...............................................................................................31
8.2 RS232 Command............................................................................................................35
8.2.1 System Control................................................................................................... 36
8.2.2 Video Switching ................................................................................................. 38
8.2.3 Preset Setting ..................................................................................................... 39
8.2.4 Audio Control...................................................................................................... 39
8.2.5 Output Resolution Setting............................................................................... 42
8.2.6 EDID Management............................................................................................. 43
8.2.7 CEC Control ......................................................................................................... 44
8.2.8 Third-party Device Control ............................................................................. 47
9. OSD Control............................................................................................................................... 52
10. Firmware Upgrade ................................................................................................................. 55
11. Panel Drawing......................................................................................................................... 56
12. Troubleshooting and Maintenance ................................................................................... 57
13. After-Sales Service ................................................................................................................ 58

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1
1. Product Introduction
Thanks for choosing the PT-PMS-42S 4x2 multi-format seamless presentation matrix
switcher with one PT-HDBT-210-RX receiver! The matrix switcher simplifies meeting
room and presentation space system integration by providing three HDMI inputs, one
USB-C input, one HDMI output and one HDBaseT output with one HDMI loop output. It
also provides external one audio input to be embedded in the first HDMI input.
Moreover, it provides one MIX audio input and one MIC audio input for global audio.
The matrix switcher provides true 4K scaling up to 4K@60Hz@4:4:4. Both inputs and
outputs are capable of providing 4K@60Hz@4:4:4 signals. The HDBaseT output
provides an innovative solution allowing transmission of HDMI 2.0 signals over a
CATx cable while ensuring very high, original image quality. It is designed for use
with the PT-HDBT-210-RX receiver. The USB-C input is ideal for AV interfacing with
newer MacBook, Chromebook, and Windows PC, as well as smart phones and tablets.
The matrix switcher supports auto switching on HDMI, HDBaseT with HDMI loop
outputs based on TMDS activity signals sensing. It also allows users to control system
functionality via Web GUI, RS232, IR and CEC.
The matrix switcher is designed to be the central component of AV system. It is ideal
for applications where multiple signals with different resolutions must be optimized
for displays. It is also suitable for presentation spaces where two displays are
needed.
1.1 Features
4x2 HDMI 2.0 seamless presentation switcher with matrix outputs.
HDMI 2.0 and HDCP 2.2 compliant. The video resolution supports up to 4K@60Hz
4:4:4.
Supports video resolution down-scaling and up-scaling, 1080P, 1920x1200P,
4K@30Hz, 4K@60Hz can be selected for HDMI and HDBaseT outputs.
Supports auto switching.
Features a mirrored HDMI output for HDBaseT output.
Visually lossless video de-compression and compression for HDMI signals
transmission up to 40m at 4K and 70m at 1080P on HDBaseT output.

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HDBaseT output support 24V PoC.
One external L+R balanced audio input can be embedded in the first HDMI input.
One MIX input and one MIC input for audio mixing.
One L+R balanced audio output and one digital SPDIF audio output for audio
de-embedding.
MIX, MIC and output audio volume control.
Supports ARC.
Independent audio adjustment.
Smart EDID management.
Controllable via front panel buttons, RS232 local and pass-through, IR local and
pass-through, TCP/IP, CEC and on OSD.
1.2 Package List
Matrix Switcher
1x PT-PMS-42S 4x2 HDMI 2.0 Seamless Matrix Switcher
2x Mounting Ears with 6 Screws
4x Plastic Cushions
1x IR Remote
1x IR Receiver (for IR EYE)
1x 3-pin Terminal Block
3x 5-pin Terminal Blocks
1x Power Adaptor (24V DC 2.71A)
HDBaseT Receiver
1x PT-HDBT-210-RX HDBaseT Receiver
2x Mounting Ears with 4 Screws
4x Plastic Cushions
1x 3-pin Terminal Block
1x User Manual
Note: Please contact your distributor immediately if any damage or defect in the
components is found.

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2. Specification
2.1 Matrix Switcher
Video Input
Video Input
(3) HDMI, (1) USB-C
Video Input Connector
(3) Type-A female HDMI, (1) Type-C USB 3.0
Video input Video
Resolution
HDMI: Up to 4Kx2K@60Hz 4:4:4 8bit
USB-C: Up to 4Kx2K@30Hz
Video Output
Video Output
(1) HDMI, (1) HDBaseT with (1) HDMI loop
Video Output Connector
(2) Type-A Female HDMI, (1) RJ45
Video output Video
Resolution
HDMI: Up to 4Kx2K@60Hz 4:4:4, supports 4K to 1080P down-scaling.
HDBaseT: Up to 4Kx2K@60Hz 4:4:4
HDMI Version
Up to 2.0
HDCP Version
Up to 2.2
Audio Input
Audio Input
(1) External balanced audio (L+R) for 1.HDMI input port,
(1) Balanced MIX audio, (1) MIC audio,
Audio Input Connector
(2) 5-pin terminal blocks, (1) 3-pin terminal block
HDMI Input Audio Stream
PCM 7.1 audio, Dolby Atmos® , Dolby® TrueHD, Dolby Digital® Plus,
DTS:X™, and DTS-HD® Master Audio™ pass-through.
Frequency Response
20Hz~20KHz, ±3dB
Max Input Level
2.0Vrms±0.5dB. 2V=16dB headroom above-10dBV (316mV) nominal
consumer line level signal.
L-R Level Deviation
<0.3dB, 1KHz sine at 0dBFS level (or max level before clipping).
Input Impedance
>10KΩ
Audio Output
Audio Output
(1) Digital SPDIF audio, (1) Balanced audio (L+R)
Audio Output Connector
(1) Toslink connectors, (1) 5-pin terminal block
HDMI Output Audio Stream
PCM 2.0
SPDIF/Stereo Output Audio
PCM 2.0

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Audio Output
Frequency Response
20Hz~20KHz, ±1dB
Max Output Level
SPDIF:±0.05dBFS.
L+R: 2.0Vrms ± 0.5dB. 2V=16dB headroom above -10dBV (316mV)
nominal consumer line level signal.
THD+N
<0.05% (-80dB), 20Hz~20KHz bandwidth, 1KHz sine at 0dBFS level (or
max level)
SNR
SPDIF: >90dB, 20Hz~20 kHz bandwidth.
L+R: >80dB, 20Hz~20KHz bandwidth.
Crosstalk Isolation
SPDIF: <-70dB, 10KHz sine at 0dBFS level (or max level before clipping).
L+R: <-80dB, 10KHz sine at 0dBFS level (or max level before clipping).
L-R Level Deviation
L+R: < 0.05dB, 1KHz sine at 0dBFS level (or max level before clipping)
Frequency Response
Deviation
<±0.5dB 20Hz~20KHz.
Output Load Capability
L+R: 1KΩ and higher (Supports 10x paralleled 10KΩ loads).
Stereo Channel Separation
>70dB@1KHz.
Noise Level
SPDIF: -90dB; L+R: -85dB
Control Part
Control Port
(1) Phantom (48V) Switch, (1) IR IN, (1) IR OUT, (1) IR EYE, (1) FIRMWARE,
(1) RS232, (1) TCP/IP
Control Connector
(1) 2-pin DIP Switch, (3) 3.5mm jacks, (1) Type-A USB, (1) 3-pin terminal
blocks, (1) RJ45
General
Transmission Mode
HDBaseT
Transmission Distance
HDBaseT Output:
1080P@60Hz ≤ 230 feet (70 meters),
4K@60Hz ≤ 131 feet (40 meters)
Bandwidth
18Gbps
Operation Temperature
-5℃~ +55℃
Storage Temperature
-25℃~ +70℃
Relative Humidity
10%-90%

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General
External Power Supply
Input: AC 100~240V, 50/60Hz; Output: 24V DC 2.71A
Power Consumption
55W (Max)
Dimension (W*H*D)
436.4mm x 44mm x 265mm
Net Weight
2.15KG
2.2 HDBaseT Receiver
Video
Input
(1) HDBT
Input Connector
(1) RJ45
Input Resolution
Up to 4Kx2K@60Hz 4:2:0
Output
(1) HDMI
Output Connector
(1) Type-A female HDMI
Output Resolution
Up to 4Kx2K@60Hz 4:4:4 8bit
Audio
Input
(1) ARC Audio In
Input Connector
(1) Toslink Connector
Output
(1) Audio Breakout
Output Connector
(1) Toslink connector
Audio Format
Supports PCM, Dolby Digital, Dolby True-HD, DTS and DTS-HD.
Frequency Response
20Hz~20KHz, ±3dB
Max Output Level
2.0Vrms±0.5dB. 2V=16dB headroom above -10dBV (316mV) nominal
consumer line level signal
THD+N
<0.05% (-80dB), 20Hz~20KHz bandwidth, 1KHz sine at 0dBFS level (or
max level)
SNR
>85dB, 20Hz~20 kHz bandwidth
Crosstalk Isolation
>70dB, 10KHz sine at 0dBFS level (or max level before clipping)
L-R Level Deviation
<0.3dB, 1KHz sine at 0dBFS level (or max level before clipping)

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Audio
Frequency Response
Deviation
< ±0.5dB 20Hz~20KHz
Output Load Capability
1KΩ and higher (Supports 10x paralleled 10KΩ loads)
Stereo Channel Separation
>70dB@1KHz
Control
Control Part
(1) ARC Mode button, (1) FW, (1) IR In, (1) IR Out, (1) RS232
Control Connector
(1) Micro-USB port, (2) 3.5mm jacks, (1) 3-pin terminal block
General
Bandwidth
18Gbps
HDMI Standard
2.0
HDCP Version
2.2, 1.4 compliant
CEC
Pass-through
Bidirectional PoC
Supported
HDMI 2.0 Cable Length
4K@60Hz 4:4:4 ≤ 5m, 4K@60Hz 4:2:0 ≤ 15m, 1080P ≤ 20m
Transmission Standard
HDBaseT
Transmission Distance
1080P@60Hz ≤ 230 feet (70 meters),
4K@60Hz ≤ 131 feet (40 meters)
Operation Temperature
-5℃~ +55℃
Storage Temperature
-25℃~ +70℃
Relative Humidity
10%-90%
Power Supply
Input:100V~240V AC; Output:24V DC 1.25A
Power Consumption
12W (Max)
Dimension (W*H*D)
40mm x 19.5mm x 84mm
Net Weight
290g

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3. Panel Description
3.1 Matrix Switcher Front Panel
①Power LED: The LED illuminates red when the device is powered on.
②SOURCE: Total five buttons with blue backlight.
1.HDMI input selector / Left Key for On Screen Display control (OSD).
2.HDMI input selector / Right Key for OSD.
3.HDMI input selector / Up Key for OSD.
4.USB-C input selector / Down Key for OSD.
Auto switching mode selector. Press this to enter or exit auto switching mode.
/ Press and hold it at least 2 seconds to enable OSD menu.
③OUTPUTS: Two buttons with blue backlight.
1.HDMI output selector.
2.HDBT output selector.
④RESOLUTION: Two output video resolution selectors. Press the 1.HDMI or 2.HDBT
button repeatedly to cycle through the four video resolutions. A series of four
LEDs, one of which illuminates blue to indicate which resolution is selected.
⑤VOLUME:
Press the volume knob in to toggle among MIX, MIC and AUDIO OUT audio
control, and the corresponding LED will illuminate blue.
Rotate the knob to increase or decrease the volume of the selected audio.
Press and hold the knob at least three seconds to mute the selected audio.
Rotate the knob to unmute.
1. HDMI 2. HDMI 3. HDMI
SOURCE OUTPUTS RESOLUTION VOLUME
PT-PMS-42S
Presentation Matrix
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3.2 Matrix Switcher Rear Panel
①INPUTS: Total four video inputs and one audio input.
1.HDMI: Type-A female HDMI port to connect the HDMI source. One external
balanced audio input (5-pin) can be embedded in the HDMI input.
2.HDMI: Type-A female HDMI port to connect the HDMI source.
3.HDMI: Type-A female HDMI port to connect the HDMI source.
4.USB-C: Type-C USB port to connect the device with SlimPort output, e.g.
MacBook.
②OUTPUTS:
1.HDMI: Type-A female HDMI port to connect the display device.
2.HDBT: RJ45 port to connect the PT-HDBT-210-RX receiver to transmit AV
signal, IR and RS232 control signal. The HDBT output supports 24V PoC.
2.HDMI: Type-A female HDMI loop output port to connect the display device.
Note: The 2.HDMI and 2.HDBT ports output the same signal.
SPDIF: Toslink connector to connect speaker or amplifier for HDMI OUT
(default) or HDBT OUT audio de-embedding, or it is used for ARC audio output
from PT-HDBT-210-RX receiver.
AUDIO: 5-pin terminal block to connect speaker or amplifier for HDMI OUT
(default) or HDBT OUT audio de-embedding.
③AUDIO INPUTS:
MIX: 5-pin terminal block to connect the audio source for global audio mixing.
MIC: Microphone audio input for global audio mixing.
Put the Phantom (48V) switch in ON position, the 3-pin terminal block to
connect condenser microphone.
Put the Phantom (48V) switch in OFF position, the 3-pin terminal block to
connect dynamic microphone.
DC 24 V1.H DM I 2.H DM I 3.H DM I 4. USB -C 1.H DM I
Phantom (48V)
ON OFF
MIC FIR MWA RE R S2 32
Tx Rx
2.H DB T
L R
AUD IOSPD IF IR EY EIR IN I R OUT
OUTPUTS AUDIO INPUTS CONTROL
2.H DM I
L R
MIX
L R
AUD IO
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④CONTROL:
IR IN: 3.5mm jack to connect the IR receiver for IR pass-through.
IR OUT: 3.5mm jack to connect the IR emitter for IR pass-through.
IR EYE: 3.5mm jack to connect IR receiver to control the switcher by the IR
remote.
FIRMWARE: Type-A USB port for firmware upgrade.
RS232: 3-pin terminal block to connect the control device (e.g. PC) to control
the switcher by sending RS232 commands. It also supports RS232
pass-through control.
TCP/IP: RJ45 port to connect the control device (e.g. PC) to control the
switcher by GUI.
⑤DC 24V: DC connector for the power adapter connection.
3.3 Receiver Front and Rear Panel
①Power LED: The LED illuminates red when power is applied.
②ARC Mode: Press the button with paper clip or other sharp tool to enable the ARC
mode, and then the left LED illuminates blue. Press it again to exit the ARC mode
and the LED is off. The ARC mode also be enabled/disabled by sending RS232
command.
③ARC Audio In: Toslink connector to connect ARC audio source device (e.g.TV).
④FW: Micro-USB port for firmware upgrade.
⑤HDMI Out: Type-A female HDMI output port to connect HDMI display (e.g.TV).
⑥Audio Breakout: If the ARC mode is OFF, the Toslink connector is connected to
speaker or amplifier for HDMI source audio de-embedding. Note that if the ARC
mode is ON, this port has no audio output.
⑦IR In: 3.5mm jack to connect the IR receiver for IR pass-through.
⑧IR Out: 3.5mm jack to connect the IR emitter for IR pass-through.
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⑨RS232: 3-pin terminal block to connect the RS232 control device (e.g. PC) or a
third-party device to be controlled.
⑩HDBT In: RJ45 port to connect the HDBT output port of switcher/transmitter by
CATx Ethernet cable. The LINK LED illuminates orange when there is a valid
HDBaseT link between the switcher/transmitter and the receiver. The HDCP LED
illuminates green when the video contains HDCP content.
⑪DC 24V: DC connector for the power adapter connection. If the
switcher/transmitter is connected to the power adaptor, the receiver doesn’t
need to connect power adaptor due to the HDBT output port of
switcher/transmitter supports 24V PoC output.

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4. System Connection
4.1 Usage Precaution
Make sure all components and accessories 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 the typical input and output connection of the
switcher:
Tx Rx
LINKHDCP
DC 24V1.HDM I 2.HDM I 3.H DMI 4. USB- C 1.HDM I
Phantom(48V)
ON OFF
MIC FIRMW ARE RS 232
Tx Rx
2.HDB T
L R
AUDIOSPDIF IR EYEIR IN I R OUT
OUTPUTS AUDIO INPUTS CONTROL
2.HDM I
L R
MIX
L R
AUDIO
Game C ons ole
Lapto p
Mac BooK R S232
Tx Rx
IR
STEREO BRIDGE
MONO
LR
MIC
LINE
48V
MIC 1 2
INPUTS
Aud io Play er
Speaker
Ampl ifi er
Soundbar
4K T V
Pro je ct or
HDMI 2.0 Receiver
IR Rec eiv er Remo te
Central
Cont rol Sys tem
HDM I:
Con tr ol :
Eth er ne t:
Aud io :
HDB as eT:
USB -C :
Blu -R ay
4K T V
5.HDMI
4.HDMI 6.VGA
OK
2.HDBT BLACK
Wire less Ro ute r iP ad
MIC

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4.3 RS232 Connection
The switcher supports RS232 local control and RS232 pass-through, and the receiver
supports RS232 pass-through. There are five modes of RS232 control connection as
below:
①Connect PC to the RS232 port of switcher to control the switcher by sending
RS232 commands. Please refer to the chapter 8.RS232 Control for more details.
②Connect PC to the RS232 port of receiver to control the switcher by sending
RS232 commands.
③Connect PC to the RS232 port of switcher to control the far-end third-party
device (e.g. Projector) which is connected to the RS232 port of receiver by
sending RS232 commands.
④Connect PC to the RS232 port of receiver to control the local third-party device
which is connected to the RS232 port of switcher by sending RS232 commands.
⑤Connect a third-party device to the RS232 port of switcher, the third-party device
can be controlled by sending RS232 commands via the RS232 Control tab of GUI.
Please refer to the chapter 7.7 RS232 Control Tab for more details.
4.4 IR Connection
The switcher provides IR EYE port for switcher control, and provides IR IN and IR OUT
ports to be used together with the IR In and IR Out ports of receiver for source or
display device control.
①Connect the IR receiver to the IR EYE port of switcher to control the switcher by
the IR remote.
②Control the far-end display device: Connect the IR receiver to the IR IN port of
switcher, and then connect the IR emitter to the IR Out port of receiver. The
display device which is connected to the receiver can be control by its IR remote
from the local switcher position.
③Control the local source device: Connect the IR receiver to the IR In port of
receiver, and then connect the IR emitter to the IR OUT port of switcher. The
source device which is connected to the switcher can be control by its IR remote
from the far-end receiver position.

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5. Button Control
5.1 Manual Switching
When the switcher is in manual switching mode, the AUTO button LED goes out.
Please follow the below steps to switch input source to output channel.
1) Press any one of four input buttons to select input source, and the corresponding
button LED turns blue.
2) Press either 1.HDMI or 2.HDBT output button to select output channel, and the
corresponding button LED turns blue.
3) Press the input button again to confirm switching setting, otherwise, it will
automatically confirm after three seconds.
5.2 Auto Switching
Please follow the below steps to enable auto switching mode for 1.HDMI or 2.HDBT
output.
1) Press AUTO, and the button LED turns blue.
2) Press either 1.HDMI or 2.HDBT output button, and the corresponding button LED
turns blue.
3) Press AUTO button again to confirm the setting, otherwise, it will automatically
confirm after three seconds.
4) Repeat the above three steps can exit auto mode, but the input source will remain
the current setting.
Note: The AUTO button LED illuminates blue when the 1.HDMI output is in auto mode or
the 2.HDBT output in auto mode.
When in auto 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.

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Source removed: When an active source is removed, the switcher will switch to the
first available active input starting at 1.HDMI input.
In auto mode, the input source also can be switched by the manual switching steps.
5.3 Switching Status Query
Press any input button can get its corresponding output channel.
Press any output button can get its corresponding input channel.
Example: 2.HDMI input is switched to the HDMI OUT.
Press 2.HDMI input button, and then the 2.HDMI source button and the 1.HDMI output
button illuminate blue and last for 3 seconds.
Press 1.HDMI output button, and then the 2.HDMI source button illuminates blue and
last for 3 seconds.
5.4 Resolution Selection
Press the 1.HDMI or 2.HDBT button on RESOLUTION area repeatedly to cycle through
the four video resolutions. A series of four LEDs, one of which illuminates blue to
indicate which resolution is selected.
5.5 Sound Volume Control
Press volume knob to choose MIX, MIC or AUDIO OUT audio needs to be adjusted, the
corresponding LED will turn blue and keep on.
Adjusting the knob in clockwise direction to increase sound volume.
Adjusting the knob in anti-clockwise direction to decrease sound volume.
Press and hold the knob at least three seconds to mute the selected audio. Rotate the
knob to unmute.