Key digital KD-DA1x2DC 4K 18G HDMI Distribution Amplifier Instruction Manual

: June 6, 2024
: Key Digital

Key digital KD-DA1x2DC 4K 18G HDMI Distribution Amplifier Instruction Manual

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-DA1x2DC 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-DA1x2DC 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-DA1x2DC features L/R analog and optical digital audio de-embed ports, enabling ease of integration into amplifiers, distributed audio systems, or sound bars. KD-DA1x2DC 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 2 HDMI outputs/displays
Ultra HD/4K Support: 4096×2160 or 3840×2160 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-PS5V2ASC 5V/2A 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.

Begin with the KD-DA1x2DC unit and all input/output devices turned off with power and HDMI cables removed
Connect your HDMI source to the input port of KD-DA1x2DC unit
Connect your HDMI displays to the output ports of KD-DA1x2DC unit
Connect the analog and/or digital audio amplifiers/receivers via the analog 3.5mm and optical outputs
BEFORE connecting power supply to power outlet, screw-in the power supply to the KD-DA1x2DC unit
AFTER ALL CONNECTIONS ARE MADE, plug-in power supply to power outlet
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.

CONFIGURE

Application Example

Rack Mounting

In addition to mounting with the supplied L-Brackets, multiple KD-DA1x2DC may be mounted in KDSMS16 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”

Rack Mounting

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

REAR PANEL

2 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 and ARC are not supported
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

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

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

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

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

$Service $Factory$ USB$

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

Forced HPD Troubleshooting Tool

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 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
---|---|---
0|

Copy EDID from HDMI Output 1

|

_ EDID Rotary Note : Default position is “A”_

1

| 1080i, 2CH AUDIO
2|

1080i, DOLBY/DTS 5.1

3

| 1080i, HD AUDIO
4|

1080p, 2CH AUDIO

5

| 1080p, DOLBY/DTS 5.1
6|

1080p, HD AUDIO

7

| 4Kx2K@60, 10.2G, HDR, 2CH AUDIO
8|

4Kx2K@60, 10.2G, HDR, DOLBY/DTS 5.1

|

9

| 4Kx2K@60, 10.2G, HDR, HD AUDIO
A|

4Kx2K@60, 18G, HDR, 2CH AUDIO

B

|

4Kx2K@60, 18G, HDR, DOLBY/DTS 5.1

C|

4Kx2K@60, 18G, HDR, HD AUDIO

|

IMPORTANT: Please apply light pressure to the EDID rotary when making your selection.

D

|

1280x720p@60 DVI (no audio)

E|

1920x1080p@60 DVI (no audio)

F

|

4Kx2K@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

4K to 1080p Down Convert Tool

When set to AUTO, KD-DA1x2DC will down convert incoming 4K content to 1080p for an individual output only if the EDID file from that individual display informs KD-DA1x2DC that the connected displays supports 1080p (not 4K).
Down Convert works individually. KD-DA1x2DC 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-PS5V2ASC 5V/2A, 100-240VAC, 50-60Hz, Interchangeable head, screw-in connector

General:

Regulation: CE, RoHS, WEEE
Enclosure: Black Metal
Product Dimensions: 4.96” x 2.74” x 0.91”
Packaging Dimensions: 8.27” x 5.67” x 3.15”
Product Weight: 0.45 lb
Shipping Weight: 1.12 lb

Important Product Warnings

Connect all cables before providing power to the unit.
Test for proper operation before securing unit behind walls or in hard to access spaces.
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.

Read and follow all instructions.
Heed all warnings.
Do not use this device near water.
Clean only with dry cloth.
Install in accordance with the manufacturer’s instructions.
Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
Only use attachments/accessories specified by the manufacturer.
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.

Contacting Key Digital

Technical Support

For technical questions about using Key Digital® products, please contact us at:

Phone: 914-667-9700
E-mail: tech@keydigital.com

Repairs and Warranty Service

Should your product require warranty service or repair, please obtain a Key Digital® Return Material Authorization (RMA) number by contacting us at:

Phone: 914-667-9700
E-mail: rma@keydigital.com

Warranty Information

All Key Digital® products are built to high manufacturing standards and should provide years of trouble-free operation. They are backed by a Key Digital Limited 3 Year Product Warranty Policy.

http://www.keydigital.com/warranty.htm

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Key Digital®, led by digital video pioneer Mike Tsinberg, develops and manufactures high quality, cutting-edge technology solutions for virtually all applications where high-end video and control are important. Key Digital® is at the forefront of the video industry for Home Theater Retailers, Custom Installers, System Integrators, Broadcasters, Manufacturers, and Consumers.