Key Digital KD-DA1x4DC Manuale utente

4K/18G 1x4 HDMI Distribution Ampliﬁer /

4K to 1080p Down-converter with

L/R and Optical Audio De-Embedding

Operating Instructions

KD-DA1x4DC

Table of Contents

Introduction .................................................................... 1

Quick Setup Guide ............................................................... 2

Application Example .............................................................. 2

Front & Rear Panel Connections, Buttons, and LEDs ....................................... 3

Speciﬁcations ................................................................... 7

Important Product Warnings & Safety Instructions ......................................... 8

Contacting Key Digital ............................................................. 9

Warranty Information.............................................................. 9

Visit the product page for most recent

version of the manual, quick setup

guide, ﬁrmware, control drivers and

all additional downloads.

Always follow the instructions provided in this Operating Manual.

Please visit www.keydigital.com for the latest product documentation and software

downloads. Product features and speciﬁcations are subject to change without notice.

Introduction

Key Digital®KD-DA1x4DC is a 4K 18G HDMI Distribution Ampliﬁer with 4K to 1080p resolution

down conversion option to enable a single HDMI video source to be displayed on multiple video

displays, regardless of 4K or 1080p resolution support. KD-DA1x4DC is engineered to offer the

best quality, performance, and reliability at a cost-effective price point and has been designed for

professional audio video installations in digital signage, surveillance monitoring applications, and

more. KD-DA1x4DC features L/R analog and optical digital audio de-embed ports, enabling ease

of integration into ampliﬁers, distributed audio systems, or sound bars. KD-DA1x4DC supports

all video resolutions up to 4K/UHD, 4:4:4 chroma sub-sampling, 12bit deep color, and HDR.

EDID handshaking and Forced Hot Plug Detection professional tools help overcome common

HDMI handshaking and integration problems for ease of installation in any environment.

Key Features

›HDMI Signal Distribution: 1 HDMI source to 4 HDMI outputs/displays

›Ultra HD/4K Support: 4096x2160 or 3840x2160 24/25/30/60hz at 4:4:4

(signals up to 18Gbps bandwidth)

›HDCP Licensing: Fully licensed and compatible with HDCP 2.2

›HDR10 and Dolby Vision®: More life-like images through a greater range of luminance levels

›Resolution Support: Supports all SD, HD, and VESA (VGA, SVGA, XGA, WXGA, SXGA, UXGA)

up to 4096x2160p.

›4K to 1080p Down Convert: When enabled, resolution conversion is applied to individual output(s)

based on EDID from the connected display

›Deep Color Support: Up to UHD/4K 30Hz 4:4:4/12 bits or 60Hz 4:4:4/8 bit

›Audio De-embedding: Audio of the connected HDMI input is output at the digital Optical and analog

3.5mm stereo connectors.

›Full Buffer System™:Manages TMDS re-clocking / signal re-generation, HDCP authentication to

source & display, and EDID Control handshake

›EDID Management: Internal library with 15 internal EDID handshakes including 4K with HDR in

addition to native EDID data copied from output/display 1

›Digital Audio Format Support: DTS-HD Master Audio™, DTS:X®, Dolby®TrueHD, Dolby Atmos®

›CEC Disconnect: Prevents unwanted control of source

Included Accessories

›Power Supply: KD-PS5V1ASC 5V/1A DC power jack, screw-in type

›Mounting Brackets: 2 L-shaped

Quick Setup Guide

CONNECT:

Test for proper operation of the unit and cables in your system before permanently

securing the unit for ﬁnal installation. Ensure that you leave enough ventilation

space to provide sufﬁcient airﬂow and cooling.

1. Begin with the KD-DA1x4DC unit and all input/output devices turned off with power and HDMI

cables removed

2. Connect your HDMI source to the input port of KD-DA1x4DC unit

3. Connect your HDMI displays to the output ports of KD-DA1x4DC unit

4. Connect the analog and/or digital audio ampliﬁers/receivers via the analog 3.5mm and optical outputs

5. BEFORE connecting power supply to power outlet, screw-in the power supply to the KD-DA1x4DC

unit

6. AFTER ALL CONNECTIONS ARE MADE, plug-in power supply to power outlet

7. Power on input and output devices

CONFIGURE:

›The default position of the Down-Convert switch is OFF. If sending 4K content to 4K and 1080p

displays, set to the AUTO position.

Application Example

4K Video Source Down-Convert Applied

KD-DA1x4DC

HDMI

Optical Audio

HDMI

Rack Mounting:

In addition to mounting with the supplied L-Brackets, multiple KD-DA1x4DC may be mounted in

KD-SMS16 using the side mounting screws. KD-SMS16 is a mounting shelf for Key Digital units with

side mounting screw spacing of 2.912”, 2.582”, or 2.252”

Do NOT exceed 12 units as doing so will result in unit damage by overheating.

Front & Rear Panel Connections, Buttons, and LEDs

REAR PANEL

HDMI Inputs

›The HDMI input is located on the left side of the back panel.

›Blue LED illuminates solid to indicate an active HDMI signal is incoming.

HDMI Outputs

›4 HDMI outputs are located on the center to right side of the back panel.

›Blue LED illuminates solid when Hot Plug Detection (HPD) is received from the connected display/

output device

HDMI Input/Output Port Speciﬁcations

›Supports up to UHD/4K @ 50/60 fps [4:4:4], 18Gbps signals

›Supports HDR10. Compliant with HDCP 2.2 and previous.

›Supports lossless compressed audio formats including Dolby®TrueHD, Dolby®Digital Plus,

Dolby Atmos®, and DTS-HD Master Audio™

›CEC Channel is not connected within unit, which prevents the source from receiving CEC commands

from displays. This is non-adjustable.

›For Display Port sources/monitors, use active converters

Supported standard 4K Video Formats:

Resolution Bandwidth

1 4K@24/25/30 [4:4:4] 8bit < 10.2Gbps

2 4K@24/25/30 [4:2:2] 8/10/12bit < 10.2Gbps

3 4K@50/60 [4:2:0] 8bit < 10.2Gbps

4 4K@24/25/30 [4:4:4] 10/12bit < 18Gbps

5 4K@50/60 [4:2:2] 8/10/12bit < 18Gbps

6 4K@50/60 [4:2:0] 10/12bit < 18Gbps

7 4K@50/60 [4:4:4] 8bit < 18Gbps

Analog L/R Audio Output

›3.5mm stereo jack with de-embedded audio from the selected HDMI source

›Automatically mutes if audio formatting is not PCM 2ch

Optical Audio Output

›Optical audio output with de-embedded audio from the selected HDMI source

›SPDIF IEC 60958 format

›Supports multi-channel Dolby®and DTS™surround formats up to 5.1

›Automatically mutes if audio formatting is not PCM, Dolby®, or DTS™

Audio Ports Speciﬁcations

›Each audio output drives audio signals up to 2VRMS with a sampling rate of 192KHz

›There are no volume or tone control features

›There are no DSP features

Audio Input Signal Format Audio L/R Output Digital Audio Output (Optical)

2ch PCM Pass-Through Pass-Though

Multi-Channel PCM Front L/R Pass-Through MUTE

Dolby DTS MUTE Pass-Though

HD Audio MUTE MUTE

FRONT PANEL

Input Active LED

»1 blue LED illuminates solid to indicate an active incoming HDMI signal

»LED blinks steadily if there is no active incoming signal.

Output Active LED

»2 blue LEDs illuminate solid when Hot Plug Detection (HPD) is received from the connected display/

output device and there is an active incoming HDMI signal from video source.

Service (Factory) USB

»This port is for factory servicing only. Does not have standard USB functionality.

Forced HPD Troubleshooting Tool

»When ON, Hot Plug Detection voltage is ﬁxed on to the connected display

»Standard HPD behavior when set to OFF position

EDID Handshaking Rotary

»EDID authentication is provided from the unit to the connected inputs/sources.

»The EDID ﬁle (AKA “handshake”) is selected using the EDID rotary on the unit and provides a list

of compatible video and audio formats as well as digital data, informing the source device what it

should output.

»Most sources will comply with a new EDID ﬁle without a power-cycle, but devices do behave

differently

»Adjustments may speed up sync time during source selection.

Position EDID Handshake Description EDID Rotary

0Copy EDID from HDMI Output 1

Note: Default position

is “A”

11080i, 2CH AUDIO

21080i, DOLBY/DTS 5.1

31080i, HD AUDIO

41080p, 2CH AUDIO

51080p, DOLBY/DTS 5.1

61080p, HD AUDIO

74Kx2K@60, 10.2G, HDR, 2CH AUDIO

84Kx2K@60, 10.2G, HDR, DOLBY/DTS 5.1

94Kx2K@60, 10.2G, HDR, HD AUDIO

A4Kx2K@60, 18G, HDR, 2CH AUDIO

B4Kx2K@60, 18G, HDR, DOLBY/DTS 5.1

C4Kx2K@60, 18G, HDR, HD AUDIO IMPORTANT: Please

apply light pressure

to the EDID rotary

when making your

selection.

D1280x720p@60 DVI (no audio)

E1920x1080p@60 DVI (no audio)

F4Kx2K@30, 10.2G, HDR, 2CH AUDIO

»Note: For Dolby Vision®, you must connect the Dolby Vision®supported display/device to

Output 1, and the EDID rotary must be set to 0. Dolby Vision®signals may not be down-converted.

Black image / no image will result.

4K to 1080p Down Convert Tool

»When set to AUTO, KD-DA1x4DC will down convert incoming 4K content to 1080p for an individual

output only if the EDID ﬁle from that individual display informs KD-DA1x4DC that the connected

displays supports 1080p (not 4K).

»Down Convert works individually. KD-DA1x4DC can apply resolution down conversion to any output

without affecting the other output.

Speciﬁcations

Technical:

»Input: HDMI Connector, Type A, 19 Pin Female

»Output (Each): HDMI Connector, Type A, 19 Pin Female

»Bandwidth: TMDS bandwidth 18 Gbps

»DDC Signal (Data): Input DDC Signal - 5 Volts p-p (TTL)

»HDMI Video/Audio Signal: Input Video Signal - 1.2 Volts p-p

»Power Supply: KD-PS5V1ASC 5V/1A, 100-240VAC, 50-60Hz,

Interchangeable head, screw-in connector

General:

»Regulation: CE, RoHS, WEEE

»Enclosure: Black Metal

»Product Dimensions: 7.4” x 2.72” x 0.78” (188 x 69.2 x 19.9mm)

»Packaging Dimensions: 9.44” x 5.67” x 3.15” (240 x 144 x 80mm)

»Product Weight: 0.7 lb

»Shipping Weight: 1.4 lb

Important Product Warnings:

1. Connect all cables before providing power to the unit.

2. Test for proper operation before securing unit behind walls or in hard to access spaces.

3. If installing the unit into wall or mounting bracket into sheet-rock, provide proper screw support

with bolts or sheet-rock anchors.

Safety Instructions:

Please be sure to follow these instructions for safe operation of your unit.

1. Read and follow all instructions.

2. Heed all warnings.

3. Do not use this device near water.

4. Clean only with dry cloth.

5. Install in accordance with the manufacturer’s instructions.

6. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus

(including ampliﬁers) that produce heat.

7. Only use attachments/accessories speciﬁed by the manufacturer.

8. Refer all servicing to qualiﬁed service personnel. Servicing is required when the device has been

damaged in any way including:

»Damage to the power supply or power plug

»Exposure to rain or moisture

Power Supply Use:

You MUST use the Power Supply PROVIDED with your unit or you VOID the Key Digital®Warranty

and risk damage to your unit and associated equipment.

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