Panduit ATLONA AT-HDR-CAT-4ED User manual

Atlona Manuals
Distribution Ampliers
AT-HDR-CAT-4ED
HDMI to HDBaseT HDMI 1 x 4 Extended Distance
Distribution Amplier
TM
4K / HDR

AT-HDR-CAT-4ED 2
Version Release Date Notes
1 Jan 2023 Initial release
Version Information

AT-HDR-CAT-4ED 3
Sales, Marketing, and Customer Support
Operating Notes
IMPORTANT: Visit https://www.atlona.com/product/AT-HDR-CAT-4ED for the latest rmware
updates and User Manual.
Warranty
To view the product warranty, use the following link or QR code:
https://atlona.com/warranty/.
Main Oce
Atlona Incorporated
70 Daggett Drive
San Jose, CA 95134
United States
Oce: +1.408.962.0515
Sales and Customer Service Hours
Monday - Friday: 6:00 a.m. - 4:30 p.m. (PST)
https://atlona.com/
International Headquarters
Atlona International AG
Tdistrasse 18
8002 Zrich
Switzerland
Oce: +41.43.508.4321
Sales and Customer Service Hours
Monday - Friday: 09:00 - 17:00 (UTC +1)

AT-HDR-CAT-4ED 4
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this product near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in
accordance with the manufacturer’s instructions.
8. Do not install or place this product near any heat
sources such as radiators, heat registers, stoves, or
other apparatus (including ampliers) that produce
heat.
9. Do not defeat the safety purpose of a polarized
or grounding-type plug. A polarized plug has two
blades with one wider than the other. A grounding
type plug has two blades and a third grounding
prong. The wide blade or the third prong are
provided for your safety. If the provided plug does
not t into your outlet, consult an electrician for
replacement of the obsolete outlet.
10. Protect the power cord from being walked on
or pinched particularly at plugs, convenience
receptacles, and the point where they exit from the
product.
11. Only use attachments/accessories specied by
Atlona.
12. To reduce the risk of electric shock and/or damage
to this product, never handle or touch this unit or
power cord if your hands are wet or damp. Do not
expose this product to rain or moisture.
13. Unplug this product during lightning storms or when
unused for long periods of time.
14. Refer all servicing to qualied service personnel.
Servicing is required when the product has been
damaged in any way, such as power-supply cord or
plug is damaged, liquid has been spilled or objects
have fallen into the product, the product has been
exposed to rain or moisture, does not operate
normally, or has been dropped.
CAUTION: TO REDUCT THE RISK OF
ELECTRIC SHOCK
DO NOT OPEN ENCLOSURE OR EXPOSE
TO RAIN OR MOISTURE.
NO USER-SERVICEABLE PARTS
INSIDE REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
The exclamation point within an equilateral triangle is intended to alert the user to
the presence of important operating and maintenance instructions in the literature
accompanying the product.
The information bubble is intended to alert the user to helpful or optional opera-
tional instructions in the literature accompanying the product.
Safety and Certication
FCC Compliance
Copyright, Trademark, and Registration
FCC Compliance and Advisory Statement: This hardware device complies with Part 15 of the FCC rules. Operation is subject to the following two
conditions: 1) this device may not cause harmful interference, and 2) this device must accept any interference received including interference that
may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class A 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. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed or used in accordance with the instructions, may cause
harmful interference to radio communications. However there is no guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment o and on, the user
is encouraged to try to correct the interference by one or more of the following measures: 1) reorient or relocate the receiving antenna; 2) increase
the separation between the equipment and the receiver; 3) connect the equipment to an outlet on a circuit dierent from that to which the receiver
is connected; 4) consult the dealer or an experienced radio/TV technician for help. Any changes or modications not expressly approved by the
party responsible for compliance could void the user’s authority to operate the equipment. Where shielded interface cables have been provided
with the product or specied additional components or accessories elsewhere dened to be used with the installation of the product, they must be
used in order to ensure compliance with FCC regulations.
© 2023 Atlona Inc. All rights reserved. “Atlona” and the Atlona logo are registered trademarks of Atlona Inc. Pricing, specications and availability
subject to change without notice. Actual products, product images, and online product images may vary from images shown here.
Dolby, Dolby Atmos, and the double-D symbol are registered trademarks of Dolby Laboratories Licensing Corporation.
The terms HDMI, HDMI High-Denition Multimedia Interface, and the HDMI Logo are trademarks or registered trademarks of
HDMI licensing Administrator, Inc.
For DTS patents, see http://patents.dts.com. Manufactured under license from DTS, Inc. DTS, the Symbol, DTS and the Symbol together, and
Digital Surround are registered trademarks and/or trademarks of DTS, Inc. in the United States and/or other countries. © DTS, Inc. All Rights
Reserved.
All other trademark(s), copyright(s), and registered technologies mentioned in this document are the properties of their respective owner(s).

AT-HDR-CAT-4ED 5
Introduction 7
Features 7
Package Contents 7
Panel Description 8
Front Panel 8
Back Panel 9
Connection Instructions 10
Connection Diagram 11
IP Conguration 12
Setting the IP Mode 12
Setting the IP Address Using Commands 13
Auto IP (APIPA) Mode 14
Device Operation 15
LED Indicators 15
Logging in to the Web Server 16
Login Registration 16
Logging in after Registration 17
Locking / Unlocking the Front Panel 18
Using the Front Panel 18
Using the Web Server 18
EDID Management 19
Learning an EDID using the Front Panel 19
Learning the EDID using the Web Server 20
Locking the EDID 20
Selecting EDID Presets 21
Changing Login Credentials 22
Changing the Username and Password 22
Controlling Audio Output 23
Audio Port Wiring 23
De-Embedding Audio 24
Adjusting the Volume Level 24
RS-232 Control 25
RS-232 Port Wiring 25
Pass-through mode 27
Control mode 28
IR Control 29
Controlling Display Devices 29
Controlling Source Devices 30
Power Button Modes 31
Normal Operation 31
Powering Sink Devices 32
Powering Sinks and the AT-HDR-CAT-4ED 34
Setting the Host Name 35
Resetting to Factory-Default Settings 36
Conguration and Management Interfaces 38
Web Server 38
Register page 38
Login page 39
Info page 40
A/V Settings page 41
RS-232 page 42
EDID page 43
Cong page 44
HDBT page 45
System page 46
Table of Contents

AT-HDR-CAT-4ED 6
Table of Contents
Appendix 49
Updating the Firmware 49
Using the Web Server 49
Using USB 50
Default Settings 51
Specications 52

AT-HDR-CAT-4ED 7
The Atlona AT-HDR-CAT-4ED is a high dynamic range (HDR) distribution amplier with one HDMI® input and
four extended distance HDBaseT™ outputs. Each output transmits 4K/UHD video @ 60 Hz with 4:4:4 chroma
sampling plus support for HDR formats, multi-channel audio, Ethernet, control signals, and power up to 330 ft.
(100 m) over Category 6/6A cable. The HDR-CAT-4ED features sophisticated integration capabilities designed for
commercial AV distribution applications including HDMI pass-through, audio de-embedding, EDID management,
CEC display control, RS-232 and IR control extension, remote power for receivers, and HDBaseT link testing. It
oers compatibility with any TCP/IP or RS-232 control system and is housed in 1U, half-rack width enclosure with
external universal power supply. The HDR-CAT-4ED is ideal for sending HDR and 4K/60 4:4:4 content to AT-HDR-EX-
100CEA-RX receivers.
Introduction
Features
Package Contents
• 4K HDR extended distance distribution amplier with one HDMI input and four HDBaseT outputs.
• Pass-through HDMI output to support local monitor.
• 4K/UHD capability @ 60 Hz with 4:4:4 chroma sampling.
• Supports HDR10, HLG, and Dolby® Vision™ HDR formats.
• Features visually lossless compression with no latency to enable HDR and 4K/60 4:4:4 video signal extension
over HDBaseT.
• HDBaseT outputs extend HDMI, Ethernet, control signals, and power up to 330 feet (100 meters) for both 4K
HDR and 1080p with Category 6/6A.
• Bidirectional RS-232 and IR control extension for each output.
• Remotely powers compatible receivers over HDBaseT.
• CEC display control sends display power on/o commands over HDBaseT using the power button, IP, or RS-
232.
• Audio de-embedding to balanced analog output with volume control for integration with a separate audio system.
• HDBaseT link test veries cable, termination, and link quality for more reliable installations.
• Multi-channel audio pass-through.
• Cascade up to 8 units to expand system without compromising performance.
• Compliant with HDCP 2.2, the latest specication for passing protected content between devices.
• Manages EDID communications with the source through a display’s EDID or internally stored EDID.
• Intuitive GUI-based conguration using integrated web server.
• Flexible control options via TCP/IP, RS-232, and IR with Atlona Velocity™ or third-party control systems.
• Front panel includes LEDs for power, HDBaseT link, and HDMI signal status information as well as buttons for
power and EDID control.
• Compatible with HDR-EX-100CEA-RX receivers for 4K/60 4:4:4 HDR as well as AT-UHD-EX receivers for
resolutions up to 4K60 4:2:0.
• 1U, half rack width enclosure with surface and rack mounting hardware included.
1 x AT-HDR-CAT-4ED
6 x 5-pin captive screw connectors
1 x 2-pin captive screw connector
1 x 48 V / 2.08 A power supply
1 x AC cord
1 x Long rack ear
1 x Short rack ear
2 x Mounting plate
4 x Feet w/ rubber grips

AT-HDR-CAT-4ED 8
Panel Description
DC 48V
IRRS-232
RX TX RXTX
HDMI
IN OUT 1 2 3
HDBaseT OUT
LAN
4
IR
RX TX RXTX
RS-232
1
IR
RX TX RXTX
RS-232
2
IR
RX TX RXTX
RS-232
3
IR
RX TX RXTX
RS-232
4 AUDIO OUT
RL
AT-HDR-CAT-4ED
OUT
IN
HDMI
4321
HDBaseT LOCK INT LEARN
FWEDIDPOWER
1 HDMI Indicators
Displays the status of the HDMI IN and HDMI OUT
ports. When connected to a source or display (sink)
device, respectively, the LED indicator will be blue.
2 HDBaseT Indicators
Displays the status of the HDBaseT OUT ports.
When connected to an HDBaseT receiver, with an
active sink, the LED indicator will be blue. If no active
sink is connected, or the sink is powered o, then the
indicator will not be illuminated.
3 LOCK
This LED will be blue when the unit is locked.
4 POWER
Press this button to power-on or place the unit into
standby mode.
5 INT
This LED indicator will be blue when the unit is using
an internal EDID.
6 LEARN
This LED indicator will ash when a downstream
EDID is being read into memory.
7 EDID
Press this button to switch between the internal (INT)
and learned (LEARN) EDID modes.
8 FW
Connect a USB Type-A to USB-C cable from this
port, to a computer, to update the rmware. Refer
to Updating the Firmware (page 49) for more
information.
12 3 5 6
4 7 8
Front Panel

AT-HDR-CAT-4ED 9
DC 48V
IRRS-232
RX TX RXTX
HDMI
IN OUT 1 2 3
HDBaseT OUT
LAN
4
IR
RX TX RXTX
RS-232
1
IR
RX TX RXTX
RS-232
2
IR
RX TX RXTX
RS-232
3
IR
RX TX RXTX
RS-232
4 AUDIO OUT
RL
AT-HDR-CAT-4ED
OUTIN
HDMI
4321
HDBaseT LOCK INT LEARN
FWEDIDPOWER
Panel Description
2 3 76
1 4 85
Back Panel
1 HDMI IN
Connect an HDMI cable from this port to a source
device.
2 LAN
Connect an Ethernet cable from this port to the
network.
3 RS-232 / IR (MASTER)
Connect a control system or other DTE device to this
port to control the AT-HDR-CAT-4ED.
4 HDMI OUT
Connect an HDMI cable from this port to an HDMI
input on a local display or an additional AT-HDR-CAT-
4ED unit.
5 HDBaseT OUT
Connect Ethernet cables from these ports to PoE-
compatible receivers.
6 RS-232/IR 1 - 4
Connect a control system or other DTE device to
these ports for pass-through zone control. Each of
these ports uses the associated HDBaseT OUT port.
This allows RS-232 command data to be sent to a
display (sink) device connected to a PoE-comptible
receiver.
7 AUDIO OUT
Connect the included 5-pin captive screw connector
to this port and connect it to an audio amplifer, such
as an AT-GAIN-60. Refer to Controlling Audio Output
(page 23).
8 DC 48V
Connect the included power supply to this power
receptacle.

AT-HDR-CAT-4ED 10
4. Connect an Ethernet cable from the LAN port to the Local Area Network (LAN). This step will be required in order
to access the built-in web server.
5. Connect an RS-232 or IR cable from the control system to the RS-232/IR ports. Refer to RS-232 Control (page
25) and IR Control (page 29) for more information.
• MASTER RS-232/IR
Connecting to this port will provide direct control of the AT-HDR-CAT-4ED. Control can be performed using
either RS-232 or electrical IR.
• RS-232/IR 1 - RS-232/IR 4
Each of these ports is associated to the respective HDBaseT OUT port. This allows RS-232 pass-through
zone control of a display (sink) device that is connected to a PoE-compatible receiver. Control can be
performed using RS-232 or electrical IR.
6. Connect an audio output device to the AUDIO OUT port. Refer to Controlling Audio Output (page 23) for more
information.
7. Connect the included power supply to the DC 48V connector and connect the power cord to an available
electrical outlet.
1. Connect an HDMI cable from a source to the HDMI IN port.
2. Connect an HDMI cable from the HDMI OUT port to a local display.
3. Connect up to four category cables from the HDBaseT OUT ports to compatible PoE-capable receivers. Refer
to the table below for information on maximum cable length and supported resolutions.
Connection Instructions
IMPORTANT: Stranded or patch cable is not recommended due to performance issues.
Sheilded cables are strongly recommended to minimize signal noise and interference.
Cable 4K/UHD - Feet / Meters 1080p - Feet / Meters
HDMI 15 5 30 10
CAT5e/6 230 70 330 100
CAT6a/7 330 100 330 100
Installation

AT-HDR-CAT-4ED 11
Installation
Connection Diagram
HDMI
HDMI
HDMI
AT-HDR-CAT-4ED
Display
Display
Display
Display
HDMI
HDBaseT
HDMI HDBaseT
HDBaseT
HDBaseT
AT-HDR-EX-100CEA-RX
Display
HDMI
PC
AT-HDR-CAT-4ED
OUT
IN
HDMI
4
3
2
1
HDBaseT LOCK INT LEARN
FWEDIDPOWER
POWER
LINK
AT-HDR-EX-100CEA-RX
FW
AT-HDR-EX-100CEA-RX
POWER
LINK
AT-HDR-EX-100CEA-RX
FW
AT-HDR-EX-100CEA-RX
POWER
LINK
AT-HDR-EX-100CEA-RX
FW
AT-HDR-EX-100CEA-RX
POWER
LINK
AT-HDR-EX-100CEA-RX
FW

AT-HDR-CAT-4ED 12
Installation
IP Conguration
1. Make sure the AT-HDR-CAT-4ED is powered.
2. Connect an Ethernet cable between the LAN port of the AT-HDR-CAT-4ED and the Local Area Network (LAN).
3. Press and hold the POWER button for approximately 15 seconds. Release the POWER button once all the front-
panel LED indicators begin to ash. The number of ashes will indicate the currently selected IP mode. Refer to
the table, below.
POWER button ashes Description
Two Static IP mode IP address: 192.168.1.254
Netmask: 255.255.0.0
Gateway: 192.168.1.1
Four DHCP mode
Setting the IP Mode
NOTE: When switching between DHCP and static IP mode, the AT-HDR-CAT-4ED will retain the last
assigned IP address until it is changed manually (static IP mode) or assigned a new IP address by the
DHCP server.
The AT-HDR-CAT-4ED is shipped with DHCP enabled. Once connected to a network, the DHCP server (if available),
will automatically assign an IP address to the unit. If the AT-HDR-CAT-4ED is unable to detect a DHCP server within
15 seconds, then the unit will use a self-assigned IP address within the range of 169.254.xxx.xxx/16. If this
occurs, refer to Auto IP (APIPA) Mode (page 14).
Use an IP scanner, along with the MAC address on the bottom of the unit, to identify the unit on the network. If a
static IP address is desired, the unit can be switched to static IP mode.
Using the Front Panel
DC 48V
IRRS-232
RX TX RXTX
HDMI
IN OUT 1 2 3
HDBaseT OUT
LAN
4
IR
RX TX RXTX
RS-232
1
IR
RX TX RXTX
RS-232
2
IR
RX TX RXTX
RS-232
3
IR
RX TX RXTX
RS-232
4 AUDIO OUT
RL
AT-HDR-CAT-4ED
OUT
IN
HDMI
4321
HDBaseT LOCK INT LEARN
FWEDIDPOWER
LOCK LED indicator
POWER button

AT-HDR-CAT-4ED 13
Installation
IP address Subnet mask Gateway
• Setting static IP mode
1. Connect to the AT-HDR-CAT-4ED using RS-232 or Telnet.
2. Execute the IPStatic command. This command requires three arguments: the desired IP address of
the AT-HDR-CAT-4ED, the subnet mask, and the gateway address. All arguments must be entered in dot-
decimal notation. The following is an example:
IPStatic 192.168.1.112 255.255.255.0 192.168.1.1
IMPORTANT: Note that when switching between DHCP and static modes, within a Telnet session,
the connection will be terminated once the IPDHCP command is executed.
Use the IPStatic and IPDHCP commands to switch between DHCP and IP mode through RS-232 or Telnet. Refer
to API documentation for more information. All commands and their arguments are case-sensitive.
Setting the IP Address Using Commands
The IP mode of the AT-HDR-CAT-4ED can also be set using the built-in web server. In order to access the web
server, the IP address of the AT-HDR-CAT-4ED must be known. Refer to Logging in to the Web Server (page 16)
for more information.
1. Open the desired web browser and enter the IP address of the AT-HDR-CAT-4ED.
2. Log in using the required credentials.
3. Click System in the menu bar.
4. Click the IP Mode toggle to switch between the DHCP and STATIC IP setting. When set to STATIC IP, the IP,
Netmask, and Gateway elds can be modied.
5. Click the Save button to save the changes.
Using the Web Server

AT-HDR-CAT-4ED 14
Installation
• Setting DHCP mode
1. Connect to the AT-HDR-CAT-4ED using RS-232 or Telnet.
2. At the command line, execute the IPDHCP command using the on argument, as shown. All characters are
case-sensitive.
IPDHCP on
Once DHCP is enabled, the unit will be assigned an IP address by the DHCP server (if present).
Auto IP (APIPA) Mode
If the AT-HDR-CAT-4ED is unable to detect a DHCP server within 15 seconds, when set to DHCP mode, then the unit
will use a self-assigned IP address within the IPv4 address block 169.254.xxx.xxx/16. If this occurs, connect
an Ethernet cable directly from the LAN port of the AT-HDR-CAT-4ED to the LAN port of a computer, then do the
following:
1. Click Start > Settings > Control Panel > Network and Sharing Center.
2. Click Change adapter settings.
3. Right-click on the adapter that is used to establish a wired connection to the network, and select Properties
from the context menu.
4. Under the Ethernet Properties dialog box, select Internet Protocol Version 4 and then click the Properties
button. Click the Use the following IP address radio button.
IMPORTANT: Before continuing, write down the current IP settings in order to restore them, later.
If Obtain an IP address automatically and Obtain DNS server automatically are selected, then
this step is not required.
5. Enter the desired static IP address or the IP address provided by the network administrator. If the computer
does not require Internet access or if a statically-assigned IP address is being used, then an address within the
IPv4 address block 169.254.xxx.xxx/16 can be entered.
6. Set the subnet mask to 255.255.0.0.
7. Click the OK button then close all Control Panel windows.

AT-HDR-CAT-4ED 15
Device Operation
The LED indicators on the front/back of the unit provide basic information on the current status of the AT-HDR-CAT-
4ED.
LED Indicators
LED Description
POWER Blue Unit is powered and in normal operating mode.
Red Unit is in standby mode.
• Press the POWER button to place the unit in normal operating mode.
Off Unit is not powered.
• Check the power supply and make sure it is securely fastened to the
locking connector on the rear of the unit.
• Make sure that the power supply is connected to an available electrical
outlet and that the outlet is “live” (some outlets are controlled by a wall
switch).
HDMI
IN / OUT
Blue IN: Source is connected to the HDMI IN port.
OUT: Sink device is connected to the HDMI OUT port.
Off IN: No source device connected to the HDMI IN port.
OUT: No sink device is connected to the HDMI OUT port.
• Check the integrity of the HDMI cable; make sure a secure connection
exists between the HDMI port on the AT-HDR-CAT-4ED and the
source/display device.
• Try a dierent HDMI cable.
HDBaseT
1 / 2
Blue Normal operation. Signal integrity between the AT-HDR-CAT-4ED and the
connected receiver is good. Note that when connected to an HDBaseT
receiver, with an active sink, the LED indicator will be blue. If no active
sink is connected, or the sink is powered o, then the indicator will not be
illuminated.
Off No connection between the HDBaseT port on the AT-HDR-CAT-4ED and
the receiver unit.
• Check the Ethernet cable for a secure connection.
• Possible bad cable; try a dierent Ethernet cable.
LOCK Blue Front-panel buttons on the AT-HDR-CAT-4ED are locked. Refer to the API
or Locking / Unlocking the Front Panel (page 18) for more information.
Flashing Blue The number of ashes indicate whether the unit is in DHCP or static IP
mode. Refer to IP Conguration (page 12) for more information.
Off Front-panel buttons on the AT-HDR-CAT-4ED are unlocked.
INT Blue AT-HDR-CAT-4ED is using the internal EDID. Refer to EDID Management
(page 19) for more information on INT EDID mode.
Off AT-HDR-CAT-4ED is set to LEARN EDID mode.
LEARN Blue AT-HDR-CAT-4ED is in “learn” mode. Refer to EDID Management (page
19) for more information on LEARN EDID mode.
Flashing Blue AT-HDR-CAT-4ED is in the process of learning the downstream EDID.
Off AT-HDR-CAT-4ED is set to INT (internal EDID) mode.

AT-HDR-CAT-4ED 16
Device Operation
1. Launch the desired web browser and enter the IP address of the AT-HDR-CAT-4ED in the address bar.
2. The AT-HDR-CAT-4ED Register page will be displayed.
Logging in to the Web Server
Most of the AT-HDR-CAT-4ED operation is handled through the built-in web server. In order to access the web
server, the IP address of the unit must be known. Refer to IP Conguration (page 12) for more information.
Before the built-in web server can be accessed, a username and password must be created.
3. Enter the desired username in the Username eld. In the example above, the username admin is used.
4. Enter the desired password in the Password eld.
IMPORTANT: The password must contain a minimum of 8 characters, including: 1 uppercase
character, 1 lowercase character, and 1 number. Special characters are not permitted. Note that the
Password and Conrm elds will be masked when entering the password.
5. Verify the password by entering it in the Conrm eld.
6. Click the Submit button.
7. The Login screen will be displayed.
8. The login registration process is complete.
Login Registration

AT-HDR-CAT-4ED 17
1. Launch the desired web browser and enter the IP address of the AT-HDR-CAT-4ED in the address bar.
2. Enter the correct username and password in the respective elds.
3. Click the Submit button.
Logging in after Registration
4. The Info page will be displayed and the login process is complete. Refer to Info page (page 40) for more
information.
Device Operation

AT-HDR-CAT-4ED 18
DC 48V
IRRS-232
RX TX RXTX
HDMI
IN OUT 1 2 3
HDBaseT OUT
LAN
4
IR
RX TX RXTX
RS-232
1
IR
RX TX RXTX
RS-232
2
IR
RX TX RXTX
RS-232
3
IR
RX TX RXTX
RS-232
4 AUDIO OUT
RL
AT-HDR-CAT-4ED
OUT
IN
HDMI
4321
HDBaseT LOCK INT LEARN
FWEDIDPOWER
Device Operation
Locking / Unlocking the Front Panel
The buttons on the front panel can be locked or unlocked. Locking the front-panel buttons prevents accidental
pressing of the buttons, which may occur when the unit is mounted in a rack environment. Locking and unlocking of
the front-panel buttons is managed through the web server or by executing the Lock and Unlock API commands.
Refer to the API documentation for more information.
1. Make sure the unit is powered.
2. Press and hold the POWER button for ve seconds.
3. Release the POWER button. The LOCK LED indicator on the front panel will glow solid blue. The front panel
buttons are now locked.
4. To unlock the front-panel buttons, press and hold the POWER button for ve seconds, then release. The LOCK
LED indicator will no longer be illuminated.
Using the Front Panel
Using the Web Server
1. Log in to the web server.
2. Click System in the menu bar.
3. Locate the System section and click the Lock toggle button to switch between LOCK and UNLOCK states.
4. The LOCK LED indicator, on the front panel, will reect the current state. When the front-panel buttons are
locked, the LOCK LED indicator will glow solid blue.
NOTE: Locking the front-panel buttons will also lock the EDID, preventing the EDID mode from being
switched between INT and LEARN modes.
LOCK LED indicator
POWER button

AT-HDR-CAT-4ED 19
DC 48V
IRRS-232
RX TX RXTX
HDMI
IN OUT 1 2 3
HDBaseT OUT
LAN
4
IR
RX TX RXTX
RS-232
1
IR
RX TX RXTX
RS-232
2
IR
RX TX RXTX
RS-232
3
IR
RX TX RXTX
RS-232
4 AUDIO OUT
RL
AT-HDR-CAT-4ED
OUT
IN
HDMI
4321
HDBaseT LOCK INT LEARN
FWEDIDPOWER
Device Operation
EDID Management
The AT-HDR-CAT-4ED provides two EDID modes: INT and LEARN. The default EDID mode is INT mode. In this
mode, the AT-HDR-CAT-4ED will automatically create an EDID based on the capabilities of all connected displays.
INT mode is recommended for the best results when the capabilities of all connected displays are unknown. INT
mode can also be used to select any of 9 EDID presets. Refer to Selecting EDID Presets (page 21) for more
information on this topic. LEARN mode can be used to capture an EDID from any sink device. Once the EDID is
learned, it will be used by the connected source device to determine what video and audio formats can be sent to
the sink device.
1. Power the AT-HDR-CAT-4ED.
2. Connect an Ethernet cable from the HDBaseT OUT 1 port on the AT-HDR-CAT-4ED to a receiver (e.g. AT-HDR-
EX-100CEA-RX).
Learning an EDID using the Front Panel
HDBaseT OUT 1 HDMI
Display
AT-HDR-CAT-4ED
AT-HDR-EX-100CEA-RX
AT-HDR-CAT-4ED
OUT
IN
HDMI
4
3
2
1
HDBaseT LOCK INT LEARN
FWEDIDPOWER
POWER
LINK
AT-HDR-EX-100CEA-RX
FW
4. Press and hold the EDID button on the AT-HDR-CAT-4ED. Release the EDID button
once the LEARN LED indicator begins to ash rapidly.
NOTE: If the AT-HDR-CAT-4ED is accidentally switched to INT mode, quickly press and release the
EDID button to switch back to LEARN mode. Switching back and forth between INT and LEARN
mode will not erase the “learned” EDID. In addition, switching to LEARN mode cannot be performed
if an EDID has not been learned.
IMPORTANT: In order for EDID learning to take place, a display must be connected to HDBaseT
OUT 1.
Once the EDID is learned, it will be used by the connected source device to determine what video and audio
formats can be sent to the sink device(s). To switch back to INT mode, quickly press and release the EDID
button.
EDID button
3. Connect an HDMI cable from the receiver
to the display (sink) device. Make sure
that the sink device is powered.

AT-HDR-CAT-4ED 20
Device Operation
Learning the EDID using the Web Server
Locking the EDID
1. Follow steps 1 through 3 under Learning an EDID using the Front Panel (page 19).
2. Log in to the web server.
3. Click EDID in the menu bar.
1. Log in to the web server.
2. Click EDID in the menu bar.
3. Click the EDID lock toggle button to switch between LOCK and UNLOCK states.
4. Click the EDID mode drop-down list and select LEARN.
5. Click the COPY button to copy the downstream EDID to memory.
The AT-HDR-CAT-4ED will now use the EDID of the downstream sink. To switch back to the INT mode, click the
EDID mode drop-down list and select INT.
4. The LOCK LED indicator, on the front panel, will reect the current state. When the EDID is locked, the LOCK
LED indicator will glow solid blue. This also serves to indicate that all front-panel buttons are locked.
To prevent accidental switching between INT and LEARN modes, the EDID can be locked.
NOTE: Locking the EDID will also lock all front-panel buttons.
NOTE: The COPY button will be disabled if there is no display connected to HDBaseT OUT 1.