KD-X444SP 4K 18G HDMI Over Extender Set

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Product Information: KD-X444SP

Specifications:

• 4K 18G HDMI over 164ft / 50m CAT5e/6 Extender Set (Tx +
  Rx)

• Supports HDR, Power over CAT, HDMI Pass-through, IR or
  RS-232

• Video Resolutions: Up to 4096×2160 at 60Hz with 4:4:4 chroma
  sub-sampling

• 1080p Resolutions: Up to 230ft / 70m

• Features Key Digital’s Full Buffer Technology software
  suite

Product Usage Instructions:

About KD-X444SP:

KD-X444SP extends video resolutions up to 4096×2160 at 60hz with
4:4:4 chroma sub-sampling over a single CAT5e/6 cable up to 164ft
(50m). It also supports 1080p resolutions up to 230ft / 70m. The
Transmit unit features an HDMI pass-thru port for integration with
local monitors or AV Receivers. In addition, it carries IR or
RS-232 for controlling remotely located equipment and features
Power over CAT (PoC) for easy installation.

Key Features:

• 4K/UHD (18G): Up to 164ft / 50m
• 1080p and lower resolutions: Up to 230ft / 70m
• Supports Full Buffer Technology software suite
• EDID handshake management, hot plug detection, HDCP
  authentication, and TMDS signal reclocking

Product Usage:

1. Connect HDMI source to Tx unit input port.

2. Connect HDMI display to Rx unit output port.

3. Connect local monitor/AV Receiver to HDMI pass-through port on
   Tx unit.

4. Connect CAT5e/6 cable between Tx and Rx unit using 568-B
   termination.

5. Connect IR emitter from IR Out port of Tx or Rx unit to the
   device you wish to control.

6. Connect RS-232 from control system or computer to the
   extender.

7. Power on source and display after all connections are
   made.

FAQ:

Q: What is the maximum video resolution supported by

KD-X444SP?

A: KD-X444SP supports video resolutions up to 4096×2160 at 60Hz
with 4:4:4 chroma sub-sampling.

Q: How far can the extender set transmit video signals?

A: The extender set can transmit video signals up to 164ft / 50m
for 4K/UHD resolutions and up to 230ft / 70m for 1080p and lower
resolutions.

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Rev 1.4 ­ Nov, 2023
KD-X444SP
4K 18G HDMI over 164ft / 50m CAT5e/6 Extender Set (Tx + Rx) with HDR, Power over CAT, HDMI Pass-through, IR or
RS-232

521 East 3rd Street Mt. Vernon, NY 10553 · www.keydigital.com

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Table of Contents
About KD-X444SP Application Diagram Quick Connection Guide Connections, LEDs, Rotaries & Switches Rack Mounting Specifications Product Warnings & Safety Instructions

Rev 1.4 ­ Nov, 2023
3 4 5 6 11 11 12

Operation Manual
Please visit www.keydigital.com for the latest product documentation, firmware, control drivers and software downloads. Product features and
specifications are subject to change without notice
Always follow the instructions provided in this Operation Manual.

IMPORTANT NOTE:
KD-X444SP units with serial numbers ending in BB feature an HDMI pass-through port on the Transmitter unit. This manual applies to those units.
KD-X444SP units with serial number ending in AA do not include HDMI pass- through port on Transmitter. All other features are identical.

521 East 3rd Street Mt. Vernon, NY 10553 · www.keydigital.com

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Rev 1.4 ­ Nov, 2023
About KD-X444SP
Key Digital® KD-X444SP is a 4K/UHD 18Gbps, HDCP2.2 compliant HDMI over CAT5e/6 Transmitter plus Receiver set for extension of digital video signals with the latest standards in resolution, HDR, and Chroma over a single CAT cable.
KD-X444SP extends video resolutions up to 4096×2160 at 60hz with 4:4:4 chroma sub-sampling over a single CAT5e/6 cable up to 164ft (50m). 1080p resolutions are extended up to 230ft / 70m. The Transmit unit features an HDMI pass-thru port for integration with local monitors or AV Receivers.
In addition to HDMI AV, KD-X444SP carries IR or RS-232 for controlling remotely located equipment. An IR sensor and IR emitter are included, and the Tx unit’s IR Input port supports Serial IR input directly from a control system / IR block. With Power over CAT (PoC), only one power supply is needed, and it may be connected at either unit for ease of installation.
KD-X444SP features Key Digital’s proprietary Full Buffer Technology software suite, with EDID handshake management, fixed hot plug detection, HDCP authentication to the connected source, and TMDS signal reclocking for installation with long cabling or many connectivity layers.

Key Features
· Single CAT5e/6 UTP/STP Extension: Fully automatic equalization, and amplification depending on cabling length.
· 4K Resolution Support: 4096×2160 or 3840×2160 24/25/30/60hz at 4:4:4 (signals up to 18Gbps bandwidth).
· Flexible Power over CAT (PoC): Only one power connection needed. Tx may power Rx, or Rx may power Tx.
· Signal Extension via CAT5e/6:
o 4K/UHD (18G): Up to 164ft / 50m
o 1080p and lower resolutions: Up to 230ft / 70m
· HDMI Pass-Thru Port: For connecting local monitors, AV surround receivers, and more.
· HDR (High Dynamic Range): More life-like images through a greater range of luminance.
· HDCP 2.2: Compliancy up to HDCP 2.x and backward compliant
· Deep Color Support: Up to UHD/4K 30Hz 4:4:4/12 bits or 60Hz 4:4:4/8 bit
· IR Sensor: Sensor powering via +5V on IR In ports collects line-of-sight IR from remote(s) without external IR connecting block.
· Up/Down IR: Two channels of IR enable control to/from devices or control systems connected to Tx and Rx units.
· RS-232: Bi-Directional control to/from Tx and Rx unit on Phoenix connector..

521 East 3rd Street Mt. Vernon, NY 10553 · www.keydigital.com

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Rev 1.4 ­ Nov, 2023

· Surround Audio Support: On HDMI pass-thru and UHDoTP outputs:
o HDMI Pass-Thru: Supports Dolby®, Dolby® TrueHD, DTSTM and DTS-HDTM (formats up to 7.1) o CAT5e/6 Output: Supports Dolby®, DTSTM (formats up to 5.1/6.1)
· Full Buffer Technology: Key Digital’s proprietary suite of EDID, HDCP, TMDS, and HPD management to overcome Pro AV installation obstacles.
· EDID Management: Internal library with 14 internal EDID handshakes including 4K with HDR in addition to native EDID data copied from CAT5e/6 or HDMI pass- thru outputs.
· HDCP Authentication: HDCP sources are authenticated by HDCP key on transmit unit, for one-to-one topology.
· Hot Plug Detection Control: Enables integrator to choose if active signal voltage is forced to connected display/output device.
· TMDS Re-Clocking: Re-generation of TMDS (AV signal) channel data at Transmit unit for brand new AV signal.
· Visually Lossless Compression: 18G enabling technology applied to all video formats exceeding 10.2Gbps to accommodate transmission channel.
· 10G Pass-thru: Mode enables uncompressed 10.2Gbps signal extension.
· Low Profile: Super slim chassis design.

Accessories

· 1x 12V/2A, 24W DC Power Supply (ScrewIn Type). SKU: KD-PS12V2ASC
· 4x Mounting Brackets

· 1x IR Emitter · 1x IR Sensor

521 East 3rd Street Mt. Vernon, NY 10553 · www.keydigital.com

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Application Diagram

Rev 1.4 ­ Nov, 2023

Quick Connection Guide
Begin with the Tx and Rx units and all input / output devices turned off with power cables removed
1. Connect your HDMI source to the input port of the Tx unit. 2. Connect your HDMI display to the output port of the Rx unit. 3. Connect your local monitor / AV Receiver to the HDMI pass-through port of the Tx unit. 4. Connect a CAT5e/6 cable between Tx and Rx unit. Use 568-B termination. 5. Connect IR emitter from the IR Out port of the Tx or Rx unit and mount over the IR receptor of the
device you wish to control. 6. IR Input is specific on the Tx and Rx unit.
a. The Tx unit only supports hard-wired / serial IR connections (the IR sensor may not be connected into the TX unit) with the following pinout:

b. The Rx units supports connection with the included IR Sensor only (hard- wired / serial IR inputs are not supported). Mount the sensor in a location to easily collect line of sight IR signals from remotes.
7. Connect RS-232 from your control system or computer.
a. TxD from the Controller connects into RxD of the extender

521 East 3rd Street Mt. Vernon, NY 10553 · www.keydigital.com

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Rev 1.4 ­ Nov, 2023
b. RxD from the Controller connects into TxD of the extender c. Ground from the Controller connects into Ground of the extender 8. BEFORE connecting power supply to power outlet, screw-in the power supply to the Tx or Rx unit. AFTER all connections are made, plug-in power supply to power outlet 9. Power on source and display

521 East 3rd Street Mt. Vernon, NY 10553 · www.keydigital.com

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Connections, LEDs, Rotaries & Switches
HDMI Input, Pass-through, and Output

Rev 1.4 ­ Nov, 2023

HDMI Input: Using a short HDMI cable, connect your source device.
HDMI Pass-through: Using a short HDMI cable, connect to a surround receiver or local monitor. KD-X444SP units with serial numbers ending in BB feature an HDMI pass-through port on the Transmitter unit. KD-X444SP units with serial number ending in AA do not include HDMI pass-thru port on Transmitter. All other features are identical.
HDMI Output: Using a short HDMI cable, connect your display device.
· For DVI-D/DVI-I sources or monitors, use appropriate adapters. For Display Port, use active converters.
· Supports up to UHD/4K @ 50/60 fps [4:4:4], 18Gbps signals. See Supported standard 4K Video Formats table
· Supports HDR · Compliant with HDCP 2.2 and previous · Supports CEC and ARC pass thru from
HDMI Input to HDMI Pass-through port. · HDMI Input & Pass-thru ports support
Dolby®, Dolby® TrueHD, DTSTM and DTS-HDTM formats up to 7.1ch

521 East 3rd Street Mt. Vernon, NY 10553 · www.keydigital.com

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CAT6/A Output and Input

Rev 1.4 ­ Nov, 2023

Connect Tx unit’s CAT6/A Output port to Rx unit’s CAT6/A Input port using CAT5e/6 UTP or STP in 568-B termination.
· 4K/UHD (up to 18Gbps) extension up to 164ft / 50m · 1080p and lower resolutions extended up to 230ft / 70m · Supports Dolby®, DTS (5.1 formats max) · Connect to KD-X444SP only. Damage will occur if connected to non-KD- X444SP products and warranty
will be void.
IR, RS-232 Ports and Selection Switch

Select RS-232 or IR control extension as desired. RS-232 and IR may not be extended simultaneously.
· If IR is selected, both IR In and IR Out ports may be utilized simultaneously. · The Tx unit’s IR In supports a hard-wired / Serial IR from a control system / IR block only (the IR sensor
may not be connected into the TX unit). The incoming IR signal is output on the Rx unit’s IR Out port. o Use a 3.5mm Mono cable to connect into the Tx unit’s IR In port:

· The RX units IR In supports connection with the included IR sensor only (hard-wired / serial IR input signals are not supported). The incoming IR signal is output on the Tx unit’s IR Out port. o The IR Sensor receives signals from a 90° angle at up to 30 ft. away. It accepts a maximum IR burst frequency of 55kHz.

521 East 3rd Street Mt. Vernon, NY 10553 · www.keydigital.com

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Rev 1.4 ­ Nov, 2023
· TX & Rx unit IR Out Port outputs IR signal with a driving power of 5V with 32mA minimum current. · RS-232 control extension:
o TxD from the Controller connects into RxD of the extender o RxD from the Controller connects into TxD of the extender o Ground from the Controller connects into Ground of the extender
EDID Management Rotary
Use the EDID rotary if you wish for your source to output a different video resolution and audio format
· The default EDID handshake setting is “1” (1920x1080p, 2ch audio).
· If setting 0 is selected, the Rx unit collects the EDID handshake from the connected display and a handshake is provided to the source that is similar to the EDID file of the display, but within KD-X444SP’s capabilities.
· Although it is not necessary, power cycling the Tx unit and HDMI source may help the detection of the newly selected handshake.

521 East 3rd Street Mt. Vernon, NY 10553 · www.keydigital.com

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Forced HPD Switch

Rev 1.4 ­ Nov, 2023

Troubleshooting tool to help overcome installation obstacles. · In cases of many connectivity layers or use with non-standard devices, hot plug detection (HPD) voltage may be lost or drop below detectable levels and lead to a “no source connected” error message and/or no image on the connected display. · If set to ON, Hot Plug Detection (HPD) voltage is fixed at the HDMI connection of the Rx unit. The connected display will be fed a constant voltage to inform the device that a partner is always connected and active. · If set to OFF, Hot Plug Detection (HPD) voltage is passed thru from connected source to the display
USB Service Port, Operate / FW Load Switch
Used for firmware updates only. · Ensure that the Firmware Mode switch is set to Operate on the Tx and Rx units for proper functionality. · Consult with Key Digital Technical Support (tech@keydigital.com) before upgrading firmrware. · USB to RS-232 interface required. Not included.

521 East 3rd Street Mt. Vernon, NY 10553 · www.keydigital.com

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Power Connection

Rev 1.4 ­ Nov, 2023

· 12V/2A (24W) power supply · Only one power connection needed. May be connected at Tx or Rx unit · Flexible Power over CAT (PoC). Tx may power Rx, or Rx may power Tx. · Not compatible with third-party PoC devices
LED Indicators

· Power (Blue) o Solid illumination during power on state, as provided by healthy connection with power supply and healthy PoC extension. o Steady blink if unit has a power short
· HDMI Link (Blue) o Tx Unit HDMI Input: Solid illumination from active signal from connected source o Tx Unit Pass-Through: Solid illumination from active Hot Plug Detection voltage with connected display/output device. o Rx Unit: Solid illumination from active incoming signal from the connected TX and active Hot Plug Detection voltage from connected display/output device.
· Live (Green) o Steady blink from healthy unit CPU state
· Video (Orange) o Illumination with active TMDS (video + audio) signal is extended o Off with no TMDS (video + audio) signal

521 East 3rd Street Mt. Vernon, NY 10553 · www.keydigital.com

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Rev 1.4 ­ Nov, 2023
Rack Mounting
In addition to mounting with the supplied L-Brackets, multiple KD-X444SP units 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.

Specifications
Technical
· Inputs Tx (Each): 1 HDMI, 1 IR, 1 RS-232 · Outputs Tx (Each): 1 CAT6/6A, 1 HDMI
pass-through, 1 IR, 1 RS-232 · Inputs Rx (Each): 1 UHDoTP, 1 IR, 1 RS-
232 · Outputs Rx (Each): 1 HDMI, 1 IR, 1 RS-232 · Bandwidth: TMDS bandwidth 18Gbps · Deep Color Support: Digital video formats in
Deep Color Mode up to 12 bits per color · DDC Communication: EDID and HDCP Bi-
directional buffering from Display to Source
General
· Regulation: CE, RoHS, WEEE, EAC · Enclosure: Black Metal · Product Dimensions (ea) (LxWxH): 4.3″ x
4.12″ x 0.82″ (109.2 x 104.6 x 20.8mm)

· HDMI Connector: Type A, 19 Pin Female · RJ45 Connector: Shielded Link Connector,
Proprietary TMDS, IR, RS-232 extension technology · IR In & Out Connectors (Each): 3.5mm · RS-232 Connector: 3-pin phoenix · Power: (1) 12V/2A, 24W DC Power Supply (Screw-In Type). 100-240VAC, 50-60Hz. Interchangeable transformer plug with screw-in connector. SKU: KD-PS12V2ASC
· Product Weight (ea): 0.595 lbs (0.27 KG) · Package Dimensions (LxWxH): 10.24″ x
5.67″ x 3.15″ (260 x 144 x 80mm) · Package Weight: 2.34 lbs (1.06 KG)

521 East 3rd Street Mt. Vernon, NY 10553 · www.keydigital.com

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Rev 1.4 ­ Nov, 2023
Product Warnings & Safety Instructions
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: o Damage to the power supply or power plug o 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.

521 East 3rd Street Mt. Vernon, NY 10553 · www.keydigital.com

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Rev 1.4 ­ Nov, 2023

521 East 3rd Street Mt. Vernon, NY 10553 · www.keydigital.com

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References

• keydigital.com
• keydigital.com/

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