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

Atlona Manuals
Distribution Ampliers
AT-UHD-CAT-4ED
HDMI to HDBaseT Distribution Amplier
4K / UHD
TM

AT-UHD-CAT-4ED 2
Version Release Date Notes
1 Mar 2019 New format
2 Mar 2021 Included instructions for Updating the Valens Firmware (page 39).
3 Apr 2022 Corrected wiring instructions for IR control of source and sink devices.
Version Information

AT-UHD-CAT-4ED 3
Sales, Marketing, and Customer Support
Operating Notes
IMPORTANT: Visit http://www.atlona.com/product/AT-UHD-CAT-4ED for the latest rmware updates
and User Manual.
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)
Warranty
To view the product warranty, use the following link or QR code:
https://atlona.com/warranty/

AT-UHD-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.
© 2022 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-UHD-CAT-4ED 5
Introduction 6
Features 6
Package Contents 6
Panel Description 7
Installation 8
Connection Instructions 8
Connection Diagram 9
IP Conguration 10
Setting the IP Mode 10
Setting the IP Address Using Commands 10
Setting the IP Address using the Web Server 11
Device Operation 12
LED Indicators 12
Locking the Front Panel 13
Using the Front Panel 13
Using the web server 13
EDID Management 14
Learning an EDID using the Front Panel 14
Learning the EDID using the web server 15
Locking the EDID 15
Selecting EDID Presets 16
Managing Users 17
Adding Users 17
Editing / Deleting Users 18
RS-232 Control 19
Determining the Port Type 19
Cable Assembly 20
Pass-through mode 21
Control mode 22
IR Control 23
Controlling Display Devices 23
Controlling Source Devices 24
Power Button Modes 25
Normal Operation 25
Powering Sink Devices 26
Powering Sinks and the AT-UHD-CAT-4ED 28
The Web Server 29
Introduction to the Web Server 29
Info page 31
RS-232 page 32
EDID page 33
Cong page 34
System page 35
Appendix 37
Updating the MCU Firmware 37
Using the Web Server 37
Using USB 38
Updating the Valens Firmware 39
Using the Web Server 39
Using USB 40
Cable Termination 41
Default Settings 42
Specications 43
Table of Contents

AT-UHD-CAT-4ED 6
The Atlona AT-UHD-CAT-4ED distribution amplier featuring pass-through HDMI input connections, four extended
distance, Ethernet-enabled HDBaseT outputs and display control capability. Each output transmits AV and control
signals up to 330 ft. (100 m). Features include 4K/UHD @ 60 Hz with 4:2:0 color subsampling, HDCP 2.2 compliance,
EDID management, and PoE for powering remote receivers. A wide variety of consumer displays may be controlled
by the UHD-CAT-4ED using CEC*. Designed for commercial distribution applications, the UHD-CAT-4ED is control
system-friendly and integrates with any TCP/IP, RS-232, or IR control system and features a 1U, half-rack width
enclosure with external, international power supply. Compatible Atlona receiver: AT-UHD-EX-100CE-RX.
Introduction
Features
Package Contents
• HDMI distribution amplier with built-in HDBaseT transmission
• Four HDBaseT outputs for transmission of HDMI, Ethernet, and control up to 330 feet (100 meters)
• 4K/UHD capability with HDCP 2.2 copy protection
• Power over Ethernet (PoE) for HDBaseT receivers
• CEC display control
• Multi-channel audio compliant
• EDID management
• Intuitive GUI-based conguration using integrated web server
• TCP/IP, RS-232, and IR control
• Easy to congure and manage with AMS (Atlona Management System)
• Field-updatable rmware
• Front panel power and signal status LEDs
• Rack-mountable 1U, half rack width enclosure
• Award-winning 10 year limited product warranty
1 x AT-UHD-CAT-4ED
1 x IR emitter (AT-IR-CS-TX)
3 x 5-pin captive screw connector
2 x Mounting Plates
1 x Rack Ear (long)
1 x Rack Ear (short)
4 x Screws (MAS-MF03+04D1 for Mounting Plate)
4 x Screws (MAS-MF04+06D for Rack Ear)
1 x 48 V / 2.08 A power supply
1 x AC cord
1 x Installation guide
*Consumer Electronics Control (CEC): Atlona has conrmed proper CEC functionality with several current models of Samsung, Panasonic, and
Sony displays. However, it is not guaranteed that CEC will work with all displays. Many manufacturers do not support the CEC “o” command,
and older displays use proprietary commands. Atlona only supports displays that use the CEC command structure dened in HDMI 1.2a. It is
recommended that dealers request an evaluation product from Atlona, before designing a system using the CEC protocol. If this is not possible,
then other control methods will need to be considered, in order to control displays using Atlona products.

AT-UHD-CAT-4ED 7
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, the LED
indicator will be blue.
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 EDID
Press this button to switch between the internal (INT)
and learned (LEARN) EDID modes.
7 LEARN
This LED indicator will ash when a downstream
EDID is being read into memory.
8 HDMI IN
Connect an HDMI cable from this port to a source
device.
9 LAN
Connect an Ethernet cable from this port to the
network.
10 HDMI OUT
Connect an HDMI cable from this port to a
condence monitor.
11 RS-232 / IR (MASTER)
Connect a control system to this port to control the
AT-UHD-CAT-4ED.
12 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.
13 HDBaseT OUT 1 - 4
Connect Ethernet cables from these ports to PoE-
compatible receivers.
14 FW
Connect a mini USB-to-USB cable from this port, to
a computer, to update the rmware of the AT-UHD-
CAT-4ED.
15 DC 48V
Connect the included power supply to this power
receptacle.
4321OUT
IN
HDMI HDBaseT LOCK
EDIDPOWER
AT-UHD-CAT-4ED
INT LEARN
TX TXRX RX
432
432
1
1
RS-232
MASTER
IN OUT
LAN
HDMI HDBaseT OUT DC 48V
IR FW
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
4321OUT
IN
HDMI HDBaseT LOCK
EDIDPOWER
AT-UHD-CAT-4ED
INT LEARN
TX TXRX RX
432
432
1
1
RS-232
MASTER
IN OUT
LAN
HDMI HDBaseT OUT DC 48V
IR FW
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
Panel Description
129 11 14
1
13 15810
2 3
46
5 7

AT-UHD-CAT-4ED 8
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 the included power supply to the DC 48V connector and connect the power cord to an available
electrical outlet.
6. Connect an RS-232 or IR cable from the control system to the RS-232/IR ports. Refer to RS-232 Control (page
19) and IR Control (page 23) for more information.
• MASTER RS-232/IR
Connecting to this port will provide direct control of the AT-UHD-CAT-4ED using a control system. Control
can be performed using either RS-232 or electrical IR.
• RS-232/IR 1 through 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.
1. Connect an HDMI cable from a UHD/HD source to the HDMI IN port.
2. Connect an HDMI cable from the HDMI OUT port to a display (sink) device.
3. Connect up to four Ethernet 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.
Installation
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

AT-UHD-CAT-4ED 9
Connection Diagram
Installation
Display
HDMI
Ethernet
AT-UHD-CAT-4ED
HDBaseT
HDMI
HDBaseT
HDBaseT
HDBaseT
LAN
Display
Display
Display
Display
HDMI
POWER
LINKFW
AT-UHD-EX-70C-RX
AT-UHD-EX-70C-RX
HDMI
POWER
LINKFW
AT-UHD-EX-70C-RX
AT-UHD-EX-70C-RX
HDMI
POWER
LINKFW
AT-UHD-EX-70C-RX
AT-UHD-EX-70C-RX
HDMI
POWER
LINKFW
AT-UHD-EX-70C-RX
AT-UHD-EX-70C-RX
Laptop
432
1OUT
IN
HDMI HDBaseT LOCK
EDID
POWER
AT-UHD-CAT-4ED
INT LEARN

AT-UHD-CAT-4ED 10
Installation
IP Conguration
The AT-UHD-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. Use an IP scanner, along with the MAC address on the back of
the unit, to identify both the unit and its IP address on the network. If a static IP address is desired, the unit can be
switched to static IP mode. Use one of the following procedures to switch between DHCP and static IP mode.
The default static IP address of the AT-UHD-CAT-4ED is 192.168.1.254.
If the AT-UHD-CAT-4ED is unable to detect a DHCP server within 15 seconds, then the unit will set all IP settings to
zero.
IMPORTANT: If the AT-UHD-CAT-4ED is receiving a DHCP IP address, and the IP mode is changed
to static, then Telnet and web server communication will be lost.
1. Make sure the AT-UHD-CAT-4ED is powered.
2. Connect an Ethernet cable between the LAN port of the AT-UHD-CAT-4ED and the Local Area Network (LAN).
3. Press and hold the POWER button for approximately 15 seconds. Release the POWER button once the LOCK
LED indicator begins to ash. The number of ashes will indicate the currently selected IP mode.
Setting the IP Mode
TX TXRX RX
432
432
1
1
RS-232
MASTER
IN OUT
LAN
HDMI HDBaseT OUT DC 48V
IR FW
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
4321OUT
IN
HDMI HDBaseT LOCK
EDIDPOWER
AT-UHD-CAT-4ED
INT LEARN
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 static IP mode
1. Connect to the AT-UHD-CAT-4ED using RS-232 or Telnet.
2. At the command line, execute the IPDHCP command using the o argument, as shown.
IPDHCP o
Setting the IP Address Using Commands
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.
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
LOCK LED indicator
POWER button

AT-UHD-CAT-4ED 11
Installation
3. Execute the IPStatic command. This command requires three arguments: the desired IP address of the AT-
UHD-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
• Setting DHCP mode
1. Connect to the AT-UHD-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).
The System page (page 35), in the web server, allows the AT-UHD-CAT-4ED to use either DHCP or static IP mode.
In order to access the web server, the IP address of the AT-UHD-CAT-4ED must be known. Refer to Introduction to
the Web Server (page 29).
1. Open the desired web browser and enter the IP address of the AT-UHD-CAT-4ED.
2. Log in using the required credentials. The factory-default username and password are listed below:
Username: root
Password: Atlona
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.
Setting the IP Address using the Web Server
5. Click the Save button to save the changes.
IP address Subnet mask Gateway

AT-UHD-CAT-4ED 12
Device Operation
The LED indicators on both the front of the unit provide basic information on the current status of the AT-UHD-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-UHD-CAT-4ED and the
source/display device.
• Try a dierent HDMI cable.
HDBaseT
1 - 4
Blue Normal operation. Signal integrity between the AT-UHD-CAT-4ED and the
connected receiver is good.
Off No connection between the HDBaseT port on the AT-UHD-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-UHD-CAT-4ED are locked. Refer to the API
or Locking the Front Panel (page 13) 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 10) for more information.
Off Front-panel buttons on the AT-UHD-CAT-4ED are unlocked.
INT Blue AT-UHD-CAT-4ED is using the internal EDID.
Off EDID is in “learn” mode.
LEARN Blue AT-UHD-CAT-4ED is in “learn” mode. Refer to EDID Management (page
14) for more information.
Flashing Blue AT-UHD-CAT-4ED is in the process of learning the downstream EDID.
Off AT-UHD-CAT-4ED is set to INT (internal EDID) mode.

AT-UHD-CAT-4ED 13
Device Operation
Locking 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
TX TXRX RX
432
432
1
1
RS-232
MASTER
IN OUT
LAN
HDMI HDBaseT OUT DC 48V
IR FW
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
4321OUT
IN
HDMI HDBaseT LOCK
EDIDPOWER
AT-UHD-CAT-4ED
INT LEARN
1. Login to the web server. Refer to Introduction to the Web Server (page 29) for more information.
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-UHD-CAT-4ED 14
Device Operation
EDID Management
The AT-UHD-CAT-4ED provides two EDID modes: INT and LEARN. The default EDID mode is INT mode. In this
mode, the AT-UHD-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 16 EDID presets. Refer to Selecting EDID Presets (page 16) 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-UHD-CAT-4ED.
2. Connect an Ethernet cable from the HDBaseT OUT 1 port on the AT-UHD-CAT-4ED to a receiver (e.g. AT-UHD-
EX-100CE-RX).
3. Connect an HDMI cable from the receiver to the display (sink) device. Make sure that the sink device is powered.
Learning an EDID using the Front Panel
HDBaseT OUT 1 HDMI
Display
AT-UHD-CAT-4ED
AT-UHD-EX-100CE-RX
4321OUT
IN
HDMI HDBaseT LOCK
EDID
POWER
AT-UHD-CAT-4ED
INT LEARN
DC 48V RS-232 HDBaseTIN HDMI OUT
RX TX
4. Press and hold the EDID button on the AT-UHD-CAT-4ED. Release the EDID button once the LEARN LED
indicator begins to ash rapidly.
NOTE: If the AT-UHD-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.
TX TXRX RX
432
432
1
1
RS-232
MASTER
IN OUT
LAN
HDMI HDBaseT OUT DC 48V
IR FW
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
4321OUT
IN
HDMI HDBaseT LOCK
EDIDPOWER
AT-UHD-CAT-4ED
INT LEARN
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

AT-UHD-CAT-4ED 15
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 14).
2. Login to the web server. Refer to Introduction to the Web Server (page 29) for more information.
3. Click EDID in the menu bar.
1. Login to the web server. Refer to Introduction to the Web Server (page 29) for more information.
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-UHD-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.

AT-UHD-CAT-4ED 16
Device Operation
Selecting EDID Presets
The AT-UHD-CAT-4ED comes with a default EDID plus 16 pre-programmed EDID selections. When selecting the
default or one of the pre-programmed EDID selections, the EDID mode must be set to INT (internal) mode.
Available EDID selections are presented in the table below.
1. Login to the web server. Refer to Introduction to the Web Server (page 29) for more information.
2. Click EDID in the menu bar.
3. Make sure the EDID lock toggle switch is set to UNLOCK.
4. Click the EDID mode drop-down list and select INT.
5. Select the desired EDID from the INT EDID settings drop-down list.
The selected EDID will be used by the source, before sending A/V data to the display (sink) device.
NOTE: If the resolution and timing limitations of all displays, connected to the HDBaseT OUT ports,
are unknown, then select the STD EDID for the best compatibility. The STD EDID will automatically
build an EDID based on the capabilities of all connected displays. When selecting an EDID, make
sure all connected displays can support the resolution and timing information. Otherwise, loss of
picture and/or audio may result.
EDID
STD ATL 1280x800 RGB 2CH
ATL 1080P 2CH ATL 1366x768 RGB 2CH
ATL 1080P Multi CH ATL 1080P DVI
ATL 1080P DD ATL 1280x800 RGB DVI
ATL 1080P 3D 2CH ATL 3840x2160@30 2CH
ATL 1080P 3D Multi CH ATL 3840x2160@30 Multi CH
ATL 1080P 3D DD ATL 3840x2160@60 2CH
ATL 720P 2CH ATL 3840x2160@60 Multi CH
ATL 720P DD

AT-UHD-CAT-4ED 17
Managing Users
The AT-UHD-CAT-4ED allows the admin user to create, edit, and remove additional TCP/IP users. All users have the
same level of access to control the AT-UHD-CAT-4ED. However, only the admin user is allowed to manage other
users. Up to three additional users can be created.
Adding Users
1. Open the desired web browser and enter the IP address of the AT-UHD-CAT-4ED.
2. Log in as the admin user with the required credentials. The factory-default username and password for the
admin user are listed below:
Username: root
Password: Atlona
3. Click the Cong tab.
4. Click the Add button, under the Edit column.
5. Enter the desired username and password in the Username&Password Edit dialog box.
6. Click the Save Change button to commit changes or click the Cancel button to return to the Cong page
without adding the user.
Once created, the new user and the associated password will appear under the All User Login Settings section.
To login with the new username, click Logout in the upper-right corner of the screen, then enter the login
credentials for the user on the Login page.
Device Operation

AT-UHD-CAT-4ED 18
Editing / Deleting Users
1. Open the desired web browser and enter the IP address of the AT-UHD-CAT-4ED.
2. Log in as the admin user with the required credentials. The factory-default username and password for the
admin user are listed below:
Username: root
Password: Atlona
a. Click Cong in the menu bar.
b. Click the Edit button next to the user to be changed.
c. Enter the new information for the user in the Username&Password Edit dialog box.
d. Click the Save Change button to commit changes or click the Cancel button to return to the Cong page
without making changes.
a. Click the Remove button next to the user to be deleted.
The username and password of a user can be changed using this method.
Editing Users
Deleting Users
Device Operation

AT-UHD-CAT-4ED 19
RS-232 Control
The AT-UHD-CAT-4ED provides two methods of RS-232 control: Pass-through mode and control mode. The master
RS-232 / IR port, allows the unit to be directly controlled using a control system. In addition four pass-through RS-
232 / IR ports allow sink devices, at the viewing location, to be controlled using a control system.
RS-232 is serial data protocol that allows Data Terminal Equipment (DTE) devices, such a computer or control
system, to communicate with Data Communication Equipment (DCE) devices, such as the AT-UHD-CAT-4ED or a
display. Although IP control is available, RS-232 still plays an integral part of many control systems.
The 25-pin D-type connector (DB-25) was dened as the RS-232 standard, but is now commonly implemented in a
nine-pin (DE-9) connector package. Each pin is numbered, as shown below.
Most DTE devices provide a male connector, while DCE devices have a female connector. However, this is not
always the case. If the port type is unknown, then a multimeter can be used to determine whether the port is DTE or
DCE:
Determining the Port Type
1. Turn on the multimeter and set it to measure DC voltage.
2. Connect the positive and negative leads to pins 3 and 5, respectively.
3. Check the voltage reading:
If the voltage is between -3 V DC and -15 V DC, then the device is DTE.
Otherwise, it is DCE.
Voltage levels between -3 V and -15 V DC represent a logic “1”.
Voltage levels between +3 V and +15 V DC represent a logic “0”.
1 2
Multimeter
345
6789

COM
+
12345
6789
54321
9876
DE-9 (male) DE-9 (female)
12345
6789
54321
9876
Device Operation
DTE Pin Descriptions DCE Pin Descriptions
Pin Signal Description
1 DCD Data Carrier Detect
2 RxD Receive Data
3 TxD Transmit Data
4DTR Data Terminal Ready
5 GND Ground (Signal)
6DSR Data Set Ready
7RTS Request to Send
8CTS Clear to Send
9 RI Ring Indicator
Pin Signal Description
1 DCD Data Carrier Detect
2 TxD Transmit Data
3 RxD Receive Data
4 DSR Data Set Ready
5 GND Ground (Signal)
6DTR Data Terminal Ready
7CTS Clear to Send
8RTS Ready to Send
9 RI Ring Indicator

AT-UHD-CAT-4ED 20
Device Operation
1. Identify the DE-9 connector that will be attached to the control system or computer (DCE) equipment.
2. Remove the DE-9 connector at the opposite end of the cable with wire cutters.
3. Remove at least 1” of the cable insulation to expose each of the nine wires.
4. Locate a multimeter and set it to the “continuity” function.
5. Attach one of the leads from the multimeter to pin 2 on the DE-9 connector.
6. Take the other lead and probe each of the wires on the opposite end of the cable. When the wire connected to
that pin is detected, the multimeter will emit an audible tone. Once this occurs, identify the current wire, and
move it to the side.
7. Repeat step 6 for pin 3 and pin 5 on the DE-9 connector.
8. Group the remaining wires and pull them aside. Electrical tape can be use to secure the wires to the outside of
the RS-232 cable.
9. Remove at least 3/16” (5 mm) of insulation from the TxD, RxD, and GND wires.
Cable Assembly
When connecting a DTE device to a DCE device, a straight-through cable should be used. A straight-through cable
is wired in such a way that the pins on one side of the cable are connected to the corresponding pins on the opposite
side of the cable, as shown in the table below. However, the AT-UHD-CAT-4ED will use only TxD, RxD, and GND
signals when communicating with a control system or computer.
GND
TxD
RxD
10. Locate the included 5-pin captive screw block and open each of the terminals by
turning the screws counter-clockwise, using a small regular screwdriver.
11. Insert the TxD, RxD, and GND wires into correct terminal, as shown, and tighten the
screws to secure each wire. Do not overtighten.
4321OUT
IN
HDMI HDBaseT LOCK
EDIDPOWER
AT-UHD-CAT-4ED
INT LEARN
TX TXRX RX
432
432
1
1
RS-232
MASTER
IN OUT
LAN
HDMI HDBaseT OUT DC 48V
IR
FW
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
TX TXRX RX
RS-232 IR
Pin Signal Signal Pin
1 DCD DCD 1
2 RxD TxD 2
3 TxD RxD 3
4DTR DSR 4
5 GND GND 5
6DSR DTR 6
7RTS CTS 7
8CTS RTS 8
9 RI RI 9
Straight-Through Cable