Atlona AT-O-451 User manual

4K HDR Four-Input HDMI Switcher
with Auto-Switching and Return
Optical Audio
atlona.com Toll free: 1-877-536-3976
Local: 1-408-962-0515
User Manual
AT-JUNO-451

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Local: 1-408-962-0515
Table of Contents
1. Introduction ................................................................................................... 3
2. Package Contents ................................................................................................... 3
3. Features ................................................................................................... 3
4. Mounting ................................................................................................... 3
5. Panel Descriptions ................................................................................................... 4
6. ARC ................................................................................................... 4
7. Captive Screw ................................................................................................... 5
8. Remote Control ................................................................................................... 5
9. WebGUI ................................................................................................... 6-9
10. RS-232 & TCP/IP
a. Terminal ................................................................................................... 10
b. Connection ................................................................................................... 10
c. Commands ................................................................................................... 11
d. IP Commands ................................................................................................... 12
11. Connection Diagram ................................................................................................... 13
12. Specifications ................................................................................................... 14
13. Safety ................................................................................................... 15
14. Warranty ................................................................................................... 16-17
15. Registration ................................................................................................... 17

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AT-UHD-HDVS-300-TX
• 1 x Unit
• 1 x Female captive screw connector
5 pin: RS-232 and IR IN
• 2 x Mounting plates
• 4 x Rubber feet
• 4 x Screws
• 1 x IR remote control
• 1 x Installation guide
• 4 input, 1 output HDMI switcher
• Passes resolutions up to 4K@60Hz 4:4:4, including HDR
• ARC capable from compatible displays
• Auto switching using both Hot Plug Detect and video detecting technology
• Flexible control options using IR, front panel, RS-232, TCP/IP, webGUI, or AMS
• Easy firmware updating using USB, webGUI, or AMS
• Multiple EDID options using internal, pass through, or learned EDIDs
• HDCP 2.2 compliant
Introduction
Features
Package Content
The Atlona JunoX™ 451 (AT-JUNO-451) is a 4x1 HDMI switcher for high dynamic range (HDR)
formats. It is HDCP 2.2 compliant and supports 4K/UHD video @ 60 Hz with 4:4:4 chroma
sampling, as well as HDMI data rates up to 18 Gbps. The JunoX 451 is ideal for residential
applications with the latest as well as emerging 4K/UHD and HDR sources and displays. It is
compatible with all video resolutions, audio formats, and color space formats supported in the
HDMI 2.0a specification, plus the ability to pass metadata for HDR content. The JunoX 451 includes
EDID management features and automatic input switching. It also supports the HDMI Audio Return
Channel for receiving digital audio from a television, and includes a TOSLINK digital audio output
for sending this audio to an AV receiver or soundbar. This JunoX Series HDMI switcher can be
controlled via Ethernet, RS-232, and IR. A handheld IR remote control is included.
Mounting
Mounting bracket x 2
The JunoX comes with mounting brackets that can be used to affix the unit to a table, desk, etc.
To affix the mounting brackets to the unit, use the four included screws. The bracket can be
affixed with the oval holes pointing to the bottom (for against the wall - picture A) or the oval holes
facing the top (for under tables - picture B).
Larger oval
hole will be
attached to
the wall/table.
Circular holes
will always be
attached to the
unit.
AB

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Panel Descriptions
INPUT POWER INPUT FW
1 2 3 4
AT-JUNO-451
HDMI IN HDMI OUT OPTICAL RS-232 IR IN LAN DC 5V
RX TX S
321 4
JUNOXTM
5 76 8 9
3 42
10
1
1. INPUT LEDs - LED will illuminate to display the currently selected input
2. POWER button - Turns switcher on or places the unit in standby mode
3. INPUT button - Use to switch between inputs
4. FW port:Firmware update port, connect a mini USB to USB A cable to a computer
Firmware is downloadable through http://www.atlona.com/product/AT-JUNO-451/
5. HDMI IN - Connect HDMI sources to these ports
6. HDMI OUT - Connect HDMI display to this port
7. OPTICAL port - Connect audio cable here for output to an AVR
8. RS-232 / IR IN - Connect to 3rd party control system for control
9. LAN port - Connect network switch or router here for Ethernet, TCP/IP, or webGUI control
10. DC 5V port - Connect included 5V power supply
ARC enables a source connected to a display to route audio back to the
switcher and send the de-embedded audio out the S/PDIF output.
1. Check to be sure the display supports ARC
2. Enable ARC on the HDMI output of the switcher through RS-232
(command ARC on), TCP/IP, or webGUI
3. Connect the HDMI output port of the switcher to the ARC labeled
input port on the display
Note: The switcher must be connected to the display’s HDMI ARC input
Note: Works well with audio from ARC enabled smart televisions
4. Connect the source to a non ARC HDMI input port on the display
5. Connect the S/PDIF port to an AVR or Zone Amp
Audio Return Channel (ARC)
Steps
INPUT POWER INPUT FW
1 2 3 4
AT-JUNO-451
HDMI IN HDMI OUT OPTICAL RS-232 IR IN LAN DC 5V
RX TX S
321 4
JUNOXTM
HDMI
Audio loop-out
S/PDIF audio loop-out
Bidirectional HDMI ARC signal
HDMI
Game Console

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Captive Screw
The captive screw connectors allow you to cut cables to a suitable length, reducing cable clutter
while providing a more reliable connection.
Connecting
The captive screw connectors have
a contact bar that is adjusted to
compress the wire against the top
contact plate. Use the screws at the
top of the connector to compress
the wire against the contact plate.
When connecting the cables to the female captive screw connector it is important that the wires be
terminated correctly. The female captive screw connector has a contact plate at the top and must
have the wires touching it for signal to pass. When wired correctly (see picture A) the signal will pass,
incorrectly (see picture B) no signal will pass.
A female captive screw connector
is included: RS-232/IR (see picture 1
& 2).
RS-232 IR
Clockwise Counter
Clockwise
Turn the screws clockwise to
raise the contact bar to the
upper contact plate and hold
the wires in place.
Turn the screws counter
clockwise to lower the
contact bar to release the
wires.
AB
1
RS-232 pin out will be
determined by the RS-232
cable and will connect as
Rx (receiver), Tx (transmitter),
and (ground). (See picture 2)
The IR IN is connected by a ground and
a signal cable. The recommended use of
this port is with a 3rd part control system.
Atlona recommends using a AT-LC-CS-IR-
2M (sold separately) for easy connection.
Typical pin out:
2 - TX - Transmitter
3 - RX - Receiver
5 - GND - Ground
Pin out color will differ per RS-232
cable.
2
54 3 2
9876
1
Signal (S)
Ground ( )
S
IR IN
S
RS-232
RX TX
1
2
Remote Control
1. Power On/Off: Turn switcher power on and off
2. Input selection: Selects source
Note: On/off video, audio, and setup buttons are not
functional for the JUNO-451 switcher
SW-R1
Video 1
Video
Video 2
All On
Power
Vol +
Vol
-
Mute
1
3
2
4
5
Input Audio
On Off
On Off
On Off

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AMS & webGUI
Atlona provides two simple solutions for setup and control: a built in webGUI and the free software
AMS (AMS functionality coming soon).
To download AMS, go to http://atlona.com/product/at-sw-ams/
To get to the log in screen of AMS: type localhost:8080 into the web browser on the computer AMS is
running on. It will go straight to the log in for AMS.
GUI IP Address: may be found using an IP scanner software (e.g. Advanced IP Scanner)
*Atlona does not assume responsibility for damage caused by other programs installed into a computer, verify programs before installing*
A login screen will appear (this is the same log in for admin and general users). For the first login to AMS,
the username is “admin” and password is “admin123”. The login for the webGUI will be username
“root” and password “Atlona”.
Ethernet
Note: Press and hold the input button on the front panel to switch between static and DHCP IP address.
Two button flashes means the unit is in static mode and four button flashes means the unit is DHCP.
Static IP configuration will be: 192.168.1.254 - 255.255.255.0
For convenience, the JunoX comes with DHCP on. This enables the switcher to be
connected to a network without knowing available IP addresses. If your network does not allow
dynamic IP addresses or if you are using the switcher with a TCP/IP control system, this feature may
be turned off and the IP address set using front panel.

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Once login is complete, the webGUI will display the JUNO-451 status information
Once logged in, select each page from the bar across the top
Video
Input Selection
Displays current input and allows the input to be selected manually
Auto Switch
Auto Switch: Toggles auto switching on/off
Audio
Output 1
Turns output audio on/off
ARC
Turns audio return channel on/off

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RS-232 parameters
Set the baud rate, databit, parity, and stop bit of the system
The EDID tab enables the EDID settings to be changed or output EDIDs to be saved to memory.
Note: To ensure compatibility, it is best to set the EDID to match the native resolution of the connected display and the
audio format of the connected sound system
Note: STD passes the display’s EDID to the source
EDID Saved
Saves any connected display’s EDID to one of the four EDID memories of the JUNO-451
-Select the memory number to save the current output’s EDID to and press the save button
at the bottom of the page.
41080p 3D 2CH 51080p 3D MCH 61080p 3D DD 7720p 2CH
8720p DD 9 1280x800 2CH 10 1366x768 2CH 11 1080p DVI
12 1280x800 DVI 13 1920x1200 2CH 14 3840x2160@60 4:2:0 2CH
15 3840x2160@60 4:2:0 MCH 16 3840x2160@30 4:4:4 2CH 17 3840x2160@30 4:4:4 MCH
18 4096x2160@60 4:2:0 2CH 19 4096x2160@60 4:2:0 MCH 20 3840x2160@60 4:4:4 2CH
21 3840x2160@60 4:4:4 MCH
0STD 11080p 2CH 2 1080p MCH 3 1080p DD

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The Users tab/page will allow users and passwords to be added/changed.
Network: IP address, netmask, gateway, and telnet port can be set to any settings compatible
with your network. The Netmask and Gateway must match your existing network
settings
IP Mode -
Static: Set a fixed IP address
Note: For a stable connection when using a control system, it is best to set up a static IP. As you select
an IP address, make certain no other devices on your network are using that IP address
DHCP: Dynamic Host Configuration Protocol will automatically select an IP address
on the network that is not already in use
Telnet Login Mode - Turn on/off - requires a password to adjust settings
Telnet Timeout - Set the auto log-off time between 1 and 3600 seconds
Broadcast - Turn on and off the feedback through all control ports
System:
Power - Turn the switcher on and off
Lock - Locks/unlocks the front panel buttons
Reset to Default - Reset the device to factory settings
Firmware Update - Use this feature to find and load the MCU firmware to the switcher
Note: Firmware can be found and downloaded from http://www.atlona.com/product/AT-JUNO-451/
page under the firmware tab

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Local: 1-408-962-0515
RS-232 & TCP/IP
To set up the RS-232 terminal the first thing needed is to find the RS-232 communications port
under the computer’s device manager. Once there, right click the port and select “Properties”.
Under the properties menu select the port settings tab and set the menu to the switcher default:
Bits per second: 115200, Data bits: 8, Parity: None, Stop bits: 1 and Flow control: None.
Terminal
Connection
RS-232 is connected through a 9-pin female D connector. Three pins will have specific functions
associated with them, some are unassigned.
No. Pin Function
1 ---- Not used
2 Tx Transmit
3 Rx Receive
4 ---- Not used
5 Gnd Ground
6 ---- Not used
7 ---- Not used
8 ---- Not used
9 ---- Not used
54 3 2
9 8 7 6
1
B
A
C