Assmann Digitus DS-55509 User manual

4x2 HDMI Matrix Switch,
4K/60Hz
Manual
DS-55509

2
Table of Contents
1. Introduction ............................................................................... 2
2. Main Features ............................................................................ 3
3. Package Contents ....................................................................... 3
4. Specification............................................................................... 4
5. Operating Controls and Functions............................................... 5
5.1 Front Panel.................................................................................5
5.2 Rear Panel..................................................................................7
6. IR Remote .................................................................................. 9
7. Application Example................................................................. 11
8. FAQ.......................................................................................... 12
1. Introduction
The Digitus® HDMI 4x Matrix Switch, 4K/60Hz distributes media
content from up to 4 HDMI sources on up to 2 recording devices
(e.g. hard drive recorder) or playback devices (TV, monitor, projector,
etc.), simultaneously and independently. Convenient switching via
remote control between the HDMI sources and output devices,
independently and without the trouble of replugging cables. Thanks to
4K UHD support, you can experience your media content in ultra-high
resolution. The perfect and complete HDMI distributor solution
whether for professional or commercial use.

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2. Main Features
•Supports 4K2K/60Hz (4:4:4)
•Video bandwidth: 18 Gbps
•HDCP 2.2 / 1.4
•HDMI 2.0
•EDID management
•ARC (Audio Return Channel)
•Supports downscaling of 4K contents on Full HD (1080p) displays
•Supports Dolby Vision, HDR10+, HLG
•Audio extractor (connection of audio output device via
optical/analog connection)
3. Package Contents
•1x 4x2 HDMI Matrix Switch
•1x Power adapter (DC 12V/1A, 1.45 m)
•1x IR remote control
•2x Mounting plate
•1x User manual

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4. Specification
Technical
HDMI Compliance
HDMI 2.0
HDCP Compliance
HDCP 2.2 and HDCP 1.4
Video Bandwidth
18 Gbps
Video Resolution
Up to 4K2K@50/60Hz (YCbCr 4:4:4),
4K2K@30Hz. All HDMI 3D TV format,
etc.
Color Space
RGB, YCbCr 4:4:4, YCbCr 4:2:2,
YCbCr 4:2:0
Color Depth
8-bit, 10-bit, 12-bit
[1080P, 4K30Hz, 4K60Hz (YCbCr 4:2:0)]
8-bit [4K60Hz (YCbCr4:4:4)]
HDMI Audio Formats
PCM2.0/5.1/7.1CH, Dolby
Digital/Plus/EX, Dolby True HD,
DTS, DTS-EX, DTS-96/24, DTS High Res,
DTS-HD Master Audio, DSD
Optical Audio Formats
PCM2.0, Dolby Digital / Plus, DTS
L/R Audio Formats
PCM2.0CH
(Note: If ARC function is turned on,
the audio port will mute.)
ESD Protection
Human-body Model:
±8kV (Air-gap discharge),
±4kV (Contact discharge)
Connections
Input Ports
4× HDMI Type A [19-pin female]
Output Ports
2× HDMI Type A [19-pin female]
1× L/R audio out
[3.5mm Stereo Mini-jack]
1× OPTICAL audio out [S/PDIF]

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Mechanical
Housing
Metal Enclosure
Color
Black
Dimensions
251mm (W) × 105mm (D) × 20mm (H)
Weight
620g
Power Supply
Input: AC100~240V 50/60Hz
Output: DC12V/1A
Power Consumption
3.8W (max)
Operating
Temperature
0°C ~ 40°C / 32°F ~ 104°F
Storage Temperature
-20°C ~ 60°C / -4°F ~ 140°F
Relative Humidity
20~90% RH (non-condensing)
5. Operating Controls and Functions
5.1 Front Panel
No.
Name
Function description
1
Power LED
The blue LED will illuminate when the
product is connected power supply
2
IR
IR receiver window. It only receives
IR remote signal from this product.

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3
OUT A button
and LED
Press the OUT A button to select an
input source to OUT A output, the
corresponding blue LED will illuminate
AUTO LED
The blue AUTO LED will illuminate and
the AUTO function will be turned on
when you press the OUT A button up to
3 seconds, press the OUT A button up
to 3 seconds again will turn off the
AUTO function.
AUTO function: Detect input signal
source. The AUTO function is turned
on, if an or a few HDMI IN ports are
connected source device, OUT A port
will output the signal from the last
connected input source
4
OUT B button
and LED
Press the OUT B button to select an
input source to OUT B output, the
corresponding blue LED will illuminate
AUTO LED
The blue AUTO LED will illuminate and
the AUTO function will be turned on
when you press the OUT B button up to
3 seconds, press the OUT B button up
to 3 seconds again will turn off the
AUTO function
AUTO function: Detect input signal
source. The AUTO function is turned
on, if an or a few HDMI IN ports are
connected source device, OUT B port
will output the signal from the last
connected input source

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5
AUDIO button
•Press AUDIO button to select
extract the input source audio
from OUT A port or OUT B port to
optical and analog L/R output, the
corresponding blue LED will
illuminate.
•If ARC function is turned on, press
AUDIO button to select return the
audio signal from OUT A or OUT B
display device to optical output,
the corresponding blue LED will
illuminate. At this time, the analog
L/R port is mute
6
4k→1080P
button
Press the button to select OUT A or
OUT B 4k→1080P downscale function,
the corresponding blue LED will
illuminate. For example, if source is 4K
but TV only supports 1080P, at this
time the input resolution with 4K
will downscale to 1080P to TV output
7
ARC button
Turn on / off ARC function. The blue
ARC LED will illuminate when you turn
on the ARC function
5.2 Rear Panel

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No.
Name
Function description
1
HDMI IN port
HDMI input ports, connect to HDMI
source device such as DVD or PS4 with
an HDMI cable
2
HDMI OUT A /
OUT B port
HDMI output ports, connect to HDMI
display device such as TV or Projector
with an HDMI cable
3
OPTICAL / L/R
port
Connect to audio output device such as
amplifier or speaker with optical and
analog audio cable
4
EDID AUTO /
COPY / STD
AUTO: Compare with Out A and Out B
display device’s EDID information, and
then sending the best EDID information
to source device of Out A and Out B.
The source device of Out A and Out B
will send the EDID information again to
Out A and Out B display device output
COPY: Copy Out A display device’s EDID
information to source device of Out A
and Out B. Then the source device of
Out A and Out B will send the EDID
information again to Out A and Out B
display device output.
STD: Out A and Out B display device
output default 1080P
5
SERVICE port
Firmware update port
6
DC 12V
Plug in 12V/1A adapter to AC wall
outlet for power supply

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6. IR Remote
Power on the product or set it
to standby mode
Output A (Output B)
1/2/3/4
Select input source signal to
Out A port output, the
corresponding blue LED on
the front panel will illuminate
Select the last or next input
source signal to OUT A port
output, the corresponding
blue LED on the front panel
will illuminate
AUTO
Turn on or off AUTO
function. The Auto function
is turned on, if an or a few
HDMI IN ports are connected
source device, Out A port will
output the signal from the
last connected input source
4K/HD
Select Out A 4k→1080P
downscale function. For
example, if source is 4K but
TV only supports 1080P, at
this time the input resolution
with 4K will downscale to
1080P to TV output

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Audio function
ARC
Turn on / off ARC function
Audio A / B
•If ARC function is turned on, press Audio A
or B button to select return the audio signal
from Out A or Out B display device to
optical port (TOSLINK) output. At this time,
the analog L/R port (Audio out) is mute
•If ARC function is turned off, press Audio A
or B button to select extract the input
source audio from Out A port or Out B port
to optical port (TOSLINK) and analog L/R
port (Audio out) output