Atlona AT UHD M2C BAL User Manual
4K/UHD HDMI Multi-Channel Digital
to Two-Channel Balanced Analog
Audio Converter
AT-UHD-M2C-BAL
User Manual
Please check http://www.atlona.com/UHD-M2C-BAL.html
for the most recent firmware update or manual.
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Toll free: 1-877-536-3976
Local: 1-408-962-0515
Table of Contents
1. Introduction ........................................................................ 3
2. Package Contents ........................................................................ 3
3. Features ........................................................................ 3
4. Panel Descriptions
a. Front Panel ........................................................................ 4
b. Rear Panel ........................................................................ 4
5. Audio ........................................................................ 5
6. WebGUI ........................................................................ 6-10
7. RS-232 ........................................................................ 11-13
8. Specifications ........................................................................ 14
8. Safety Information ........................................................................ 15
9. Warranty ........................................................................ 16
10. Atlona Product Registration ........................................................................ 17-18
11. Trademark Acknowledgement ........................................................................ 18
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Introduction
The Atlona 4K HDMI Multi-channel to Two Channel Balanced Audio Converter accepts up to Dolby
TrueHD and DTS-HD Master Audio then down converts it to two channel or one channel +4dBu
balanced audio. With built in RS-232, TCP/IP, and GUI control for audio mode switching, volume,
bass, and treble adjustment, the M2C-BAL provides an easy interface to control systems.
Package Contents
• 1 x AT-UHD-M2C-BAL
• 1 x 5 pin female captive screw connector
• 1 x 3.5mm to DB9 adapter
• 1 x Locking 5V DC adapter
• 1 x User Manual
Features
• Converts multi-channel audio into two/one channel audio
• Switch allows volume settings to be externally controlled (adjust) or force volume to factory
settings (default= 0 gain and flat EQ)
• RS-232, TCP/IP, and webGUI control options
• +4 dBu balanced analog audio output
• Compatible with all digital audio formats including lossless and lossy
• Audio EDID - Replaces the 2Channel audio portion of a display’s EDID with EDID that accepts all
PCM, LPCM, Dolby® and DTS® audio formats (including Dolby® Digital, Dolby® Digital Plus,
Dolby® TrueHD, DTS Digital Surround™ and DTS-HD Master Audio™)
• LED audio status lights for all audio formats to determine incoming audio signals
• Up to 4K/UHD @ 30Hz pass through
• Control volume, bass, and treble using webGUI, TCP/IP, or RS-232
• HDCP management
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FW
HDMI IN
Panel Description
Front Panel
HDMI IN
1
FW
2
3 4 5
7 8
6
9
1. HDMI Input port: Connect HDMI source here
2. Mini USB port: Firmware update port, connect a Mini USB to USB A cable to a computer
3. Red LED: Illuminates when receiving power
4. Green LED: will illuminate when a PCM audio signal is detected
5. Green LED: illuminates when a Dolby® Digital signal is identified
6. Green LED: Dolby® Digital Plus signal indicator
7. Green LED: illuminates when receiving a Dolby® TrueHD signal
8. Green LED: light will illuminate when a DTS Digital Surround™ is present
9. Green LED: signal light will turn on when DTS-HD Master Audio™ signal is received
NOTE: LED signifies incoming digital audio signal type only. The M2C-BAL does not decode
Dolby or DTS signals on pass through. The M2C-BAL will decode Dolby and DTS, down
mix it to one/two channel, and send that signal to either the HDMI output or the analog
output.
Back Panel
1. DC 5V: Connect included locking 5V DC power supply here.
2. L/R audio port: Connect to an amplifier, mixer, DSP, or other audio input
3. Control Switch: Switch between adjust and default modes
Adjust - Allows the M2C-BAL volume to be controlled through RS-232 or TCP/IP
Default - Factory neutral settings, volume cannot be controlled by RS-232 or TCP/IP
*Gain will be set to 0 and EQ will be flat
4. RS-232 port: Connect control system to RS-232 port
3.5mm pin out - Tip: 2 (TX), Ring: 3(RX), Sleeve: 5 (Ground)
5. LAN port: Connect network switch or router to this port for TCP/IP or WebGUI control
6. HDMI out port: Connect to an HDMI display, extender, or switcher
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R
DC 5V ANALOG
1
2
+
--
ADJUST
L
DEFAULT
3 4 5 6
RS-232 LAN
HDMI OUT
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Analog Audio
A captive screw analog audio connector is provided to ensure a more reliable and secure
connection. The captive screw connector supports balanced and unbalanced audio output.
Balanced audio connections use two signal wires and a ground to ensure the least amount of
interference to an audio signal over longer cable runs. Unbalanced audio connections use two wires
for shorter audio runs.
XLR
1 ( )
3 ( - )
2 ( + )
Note: Pin outs may vary, please refer to the audio device’s manual to ensure a correct connection.
Important! When terminating cables, please ensure exposed adjacent wires do not touch. This may result in
a short that can damage connected devices.
BALANCED UNBALANCED
L / R
+
-
+
-
Tip (+)
Sleeve ( Ground)
L / R
+
-
+
RCA
-
Important! With unbalanced connections a jumper is needed between ground and negative to reduce noise
Note: Set the unbalanced output level in the webGUI to reduce or prevent distortion
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+
-
+
-
+ +
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TCP/IP
For convenience, the M2C-BAL comes with DHCP on. This enables the switcher to be connected
to a network or network device the preset IP matches. If your network does not allow dynamic IP
addresses, this feature may be turned off and set using RS-232 commands.
TCP/IP WebGUI
Atlona has created an easy to use WebGUI for initial setup and later changes to the configuration
of the M2C-BAL.
To begin, plug a LAN cable into the LAN port of the M2C-BAL and your network, then type the IP
address of the M2C-BAL into a web browser of a PC connected to the same network (as seen below).
To find the switcher IP: use RS-232 command “IPCFG”
Important: If any stability issues are experienced, disable any anti-virus or firewall that may interfere with
network communication to the switcher. Once set up is done and the switcher GUI is no
longer used, the firewall and anti-virus can be re-enabled.
A login screen will appear (this is the same log in for admin and general users). For the first log in
(and future admin changes) the username is “root” and password is “Atlona”.
Note: Only the admin password can be changed (see page 12). The username will always remain
“root”.
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