PureTools PT-PSW-21C User manual

User Manual
PT-PSW-21C
User Manual
Teleconference Switcher 4K (60Hz 4:4:4) USB-C and HDMI
Model PT-PSW-21C
Designed in Germany
© 2020 PureLink GmbH All rights reserved. V1.3

User Manual
PT-PSW-21C
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-PSW-21C
REACH | 1907/2006/EU
ROHS | 2011/65/EU
PureLink hereby declares that this product PureTools PT-PSW-21C 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-PSW-21C 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/4251364718360_CE.pdf

User Manual
PT-PSW-21C
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-PSW-21C
Table of Content
1. Product Introduction....................................................................................................1
1.1 Features ............................................................................................................1
1.2 Package List......................................................................................................2
2. Specification ...............................................................................................................3
3. Panel Description........................................................................................................5
3.1 Front Panel........................................................................................................5
3.2 Rear Panel.........................................................................................................6
4. System Connection.....................................................................................................7
4.1 Usage Precaution..............................................................................................7
4.2 System Diagram................................................................................................7
5. Button Control.............................................................................................................8
5.1 Manual Switching ..............................................................................................8
5.2 Automatic Switching ..........................................................................................8
5.3 Display Control..................................................................................................9
5.4 EDID Setting......................................................................................................9
6. RS232 Control..........................................................................................................11
6.1 RS232 Control Software..................................................................................11
6.2 RS232 Command............................................................................................16
6.2.1 Device Control.......................................................................................16
6.2.2 Source Switching...................................................................................17
6.2.3 User-defined EDID ................................................................................17
6.2.4 CEC/RS232 Function Setting................................................................18
6.2.5 Display Control......................................................................................19
6.2.6 Switcher Baud Rate Setting...................................................................19
6.2.7 Third-party Device Control.....................................................................20
7. Panel Drawing ..........................................................................................................26

User Manual
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8. Troubleshooting & Maintenance ...............................................................................27
9. After-Sales Service...................................................................................................28

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PT-PSW-21C
1
1. Product Introduction
Thanks for choosing the HDMI 2.0 2x1 Presentation Switcher. The switcher is
designed to switch HDMI input or USB-C input to one HDMI output. It supports video
resolution up to 4Kx2K@60Hz 4:4:4 8bit, 1080P, and 3D. Besides passing EDID
information from the display, there are multiple built-in EDID settings which can be
selected by the 4-pin DIP switch on the front panel.
The switcher supports stereo and multichannel audio on the HDMI inputs. In addition
to the audio embedded in the HDMI output stream, the audio is simultaneously
de-embedded to a balanced analog audio output. It also supports device extension by
providing one type-B USB port for host connection, and two type-A USB ports for HID
devices such as camera, microphone, keyboard etc.
The switcher features multiple methods of control. When in the AUTO mode, the
switcher will automatically switch to the first detected source device. When the
active source is removed, the switcher will switch to the lowest numbered input. The
switcher can be manually controlled by the front panel buttons and RS232 command.
CEC allows the display device can be controlled by the front panel buttons and RS232
CEC commands.
1.1 Features
⚫18G 2x1 switcher with HDMI and USB-C inputs.
⚫Supports automatic switching.
⚫Controllable via front panel buttons and RS232.
⚫Supports HDMI 2.0, 4Kx2K@60Hz 4:4:4, HDR 10, Dolby Vision, HDCP 2.2.
⚫Provides charging on USB-C port up to 40W.
⚫Provides USB data (USB 3.0/2.0) and 4K video transmission on USB-C port.
⚫Balanced analog audio for audio de-embedding.
⚫Peripheral units (e.g. microphone and camera) can be connected by type-A USB
(USB 3.0/2.0) ports and automatically switched along with HDMI and USB-C input
as USB DEVICES for corresponding HOST.

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⚫Smart EDID management capable for various applications and customized setting.
⚫Front panel buttons trigger both CEC and RS232 commands for display control.
(ON, OFF, MUTE, VOL+, VOL -).
1.2 Package List
⚫1x PT-PSW-21C 18G 2x1 Presentation Switcher
⚫2x Mounting Ears with 4 Screws
⚫4x Plastic Cushions
⚫1x 5-pin Terminal Block
⚫1x Power Cord
⚫1x Power Adapter (24V DC, 2.71A)
⚫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
Video
Video Input
(1) HDMI, (1) USB-C
Video Input Connector
(1) Type-A female HDMI, (1) Type-C USB
HDMI Input Resolution
Up to 4Kx2K@60Hz 4:4:4 8bit
USB-C Input Resolution
Up to 4Kx2K@30Hz 4:4:4
Video Output
(1) HDMI
Video Output Connector
(1) Type-A female HDMI
HDMI Output Resolution
Up to 4Kx2K@60Hz 4:4:4 8bit
HDMI Version
2.0
HDCP Version
2.2
USB Version
3.0
HDR 10
Supported
CEC
Supported
HPD
Supported
Audio
Audio Output
(1) AUDIO OUT (Stereo balanced L/R)
Audio Output Connector
(1) 5-pin terminal block
HDMI Audio Format
LPCM 7.1 audio, Dolby Atmos® , Dolby® TrueHD, Dolby Digital®
Plus, DTS: X™, and DTS-HD® Master Audio™ pass-through
Stereo balanced L/R audio Format
PCM
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
>80dB, 20Hz ~ 20KHz 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)
Frequency Response Deviation
<±0.5dB 20Hz ~ 20KHz
Output Load Capability
1KΩ and higher (supports 10x paralleled 10KΩ loads)
Stereo Channel Separation
>70dB@1KHz

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Control Part
Control
(1) EDID, (1) FW, (1) RS232, (1) HOST, (2) DEVICE
Control Connector
(1) 4-pin DIP switch, (1) Micro-USB, (1) 3-pin terminal block, (1)
Type-B USB 3.0, (2) Type-A USB 3.0
General
HDMI 2.0 Cable Length
4K@60Hz 4:4:4 ≤ 5m,
4K@60Hz 4:2:0 ≤ 10m,
1080P ≤ 15m
Bandwidth
18Gbps
Operation Temperature
-10℃~ +55℃
Storage Temperature
-25℃~ +70℃
Relative Humility
10% ~ 90%
External Power Supply
Input: AC 100~240V, 50/60Hz, Output: 24V DC 2.71A
Power Consumption
54W (Max)
Dimension (W*H*D)
168.0mm x 24.5mm x 95.0mm
Net Weight
245g

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3. Panel Description
3.1 Front Panel
①Power LED: The LED lights up red when the device is power on.
②INPUT:
A. HDMI: The LED lights up green when the HDMI input is selected in AUTO mode,
or lights up orange when the HDMI input is selected in manual mode.
B. USB-C: The LED lights up green when the USB-C input is selected in AUTO
mode, or lights up orange when the USB-C input is selected in manual mode.
C. SELECT AUTO/3s: Press the button to select the next input source, or press
and hold the button at least 3 seconds to enable auto switching mode. Note
that the factory default switching mode is AUTO.
③DISPLAY:
A. Press ON to turn on the display.
B. Press OFF to turn off the display.
C. Press to mute/unmute display audio.
D. Press to decrease the audio volume gradually, or press and hold it to
decrease the audio volume constantly.
FW
EDID
ON
OFF 1
0
1 2 3 4
OFFONHDMI USB-C SELECT
AUTO/3s
INPUT DISPLAY
12
A A
B B
C C DE
345

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E. Press to increase the audio volume gradually, or press and hold it to
increase the audio volume constantly.
④EDID: 4-pin DIP switch for EDID setting.
⑤FW: Micro-USB port for firmware upgrade.
3.2 Rear Panel
①HDMI IN: Type-A female HDMI input port to connect HDMI video source.
②USB-C IN: Type-C USB with charging capability to connect the Macbook or other
device with SlimPort output.
Note: The USB 3.0 cable is recommended to be used to ensure optimal machine
performance.
③HDMI OUT: Type-A female HDMI output port to connect video display.
④AUDIO OUT: 5-pin terminal block for balanced audio output.
⑤RS232: 3-pin terminal block to connect control device (e.g. PC) or third-party
device for RS232 control.
⑥HOST: Type-B USB ports for host connection.
⑦DEVICES: Two type-A USB ports to connect HID devices (e.g. microphone and
camera). The HID devices are used to control the HOST when the HDMI input has
been selected, or to control the USB-C source device (e.g. Macbook) when the
USB-C input has been selected.
⑧DC 24V: DC barrel port for power adapter connection.
HDMI IN USB-C IN HDMI OUT AUDIO OUT DEVICES
1 2
RS232 HOST
L R Tx Rx DC 24V
12345678

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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

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5. Button Control
5.1 Manual Switching
When the switcher is in the manual switching mode, press the SELECT AUTO/3s
button repeatedly to cycle through the two video inputs, and the corresponding
source LED lights up orange immediately.
5.2 Automatic Switching
Press and hold the SELECT AUTO/3s button at least three seconds to enable automatic
switching. The current input source will not be changed, and its source LED will turn
green.
When in the AUTO mode, the switcher will switch according to the following rules:
⚫ Press and hold the SELECT AUTO/3s button at least three seconds again can exit
AUTO mode, but the input source will not be changed, and the corresponding
source LED will turn orange.
⚫ New input: Upon detecting a new input, the switcher will automatically select the
new input.
⚫ Press the SELECT AUTO/3s button also can forcibly change the input source.
⚫ Reboot: Once 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
other active input.

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5.3 Display Control
The switcher supports CEC, and the DISPLAY buttons on the front panel are designed
for Display On/Off and volume adjustment.
⚫ ON:Display On.
⚫ OFF: Display Off.
⚫ : Mute/unmute display audio.
⚫ : Volume down display audio.
⚫ : Volume up display audio.
5.4 EDID Setting
The Extended Display Identification Data (EDID) is used for the source device to
match its video resolution with the connected display. By default, the source device
obtains its EDID from the first connected display. Meanwhile, since the displays with
different capabilities are connected to the switcher, the 4-pin DIP switch on the front
panel can be used to set the EDID to a built-in fixed value. Use the following table to
determine the setting for the 4-pin DIP switch for specific video resolution and audio
capabilities.
The switch represents “0” when in the lower (OFF) position, and it represents “1”
while putting the switch in the upper (ON) position.

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Switch Status
Video Resolution
Audio Format
0000 (Default)
EDID pass-through
0001
1280x720@60Hz RGB 4:4:4
Stereo
0010
1920x1080@60Hz
DVI
0011
1920x1080@60Hz 2D
PCM 2.0
0100
1920x1080@60Hz RGB 4:4:4
Stereo
0101
1920x1080@60Hz RGB 4:4:4
High Definition
0110
1920x1200@60Hz RGB 4:4:4
Stereo
0111
3840x2160@60Hz RGB 4:2:0 HDR
Stereo
1000
3840x2160@60Hz RGB 4:2:0 HDR
High Definition
1001
3840x2160@60Hz RGB 4:4:4
Stereo
1010
3840x2160@60Hz RGB 4:4:4
High Definition
1011
User-define EDID (Please refer to the 6.2.3 User-defined EDID )
1100
1101
1110
1111
Note: The EDID DIP switch only used for setting the EDID of HDMI source device, and
the EDID of USB-C source device automatically follows the HDCP version of display
device.

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6. RS232 Control
Connect the RS232 port to control device (e.g. PC) with RS232 cable. The switcher can
be controlled by sending RS232 commands.
6.1 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.

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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 “)
Click “Continue” to
close this window.
Click “OK” to
close this
window.

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13
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.

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14
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.