Atlona AT-JUNO-451 Installation Manual
atlona.com
Toll free: 1-877-536-3976
Local: 1-408-962-0515
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.
• 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
Package Content
4K HDR Four-Input HDMI Switcher
with Auto-Switching and Return
Optical Audio
AT-JUNO-451 Installation Guide
Please check http://www.atlona.com/product/AT-JUNO-451
for the most recent firmware update or manual.
2
atlona.com
Toll free: 1-877-536-3976
Local: 1-408-962-0515
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
JUNOX
TM
5 76 8 9
3 42
10
1
Panel Descriptions
Front Panel
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
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
324
5
Input
Audio
On
Off
On
Off
On
Off
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
JUNOX
TM
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
HDMI
Audio loop-out
S/PDIF audio loop-out
Bidirectional HDMI ARC signal
HDMI
Game Console
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