Atlona AT-UHD-M2C-BAL User manual

4K/UHD HDMI Multi-Channel Digital
to Two-Channel Balanced Analog
Audio Converter
atlona.com Toll free: 1-877-536-3976
Local: 1-408-962-0515
Please check http://www.atlona.com/UHD-M2C-BAL.html
for the most recent firmware update or manual.
User Manual
AT-UHD-M2C-BAL

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
2
atlona.com Toll free: 1-877-536-3976
Local: 1-408-962-0515
Table of Contents

3
atlona.com Toll free: 1-877-536-3976
Local: 1-408-962-0515
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
Features
• 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
• 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

DC 5V ANALOG DEFAULT RS-232 LAN
ADJUST
HDMI OUT
R
++--
L
FW
HDMI IN
DC 5V ANALOG DEFAULT RS-232 LAN
ADJUST
HDMI OUT
R
++--
L
FW
HDMI IN
4
atlona.com Toll free: 1-877-536-3976
Local: 1-408-962-0515
Panel Description
Front Panel
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.
123 4 5 6789
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
123 4 5 6

5
atlona.com Toll free: 1-877-536-3976
Local: 1-408-962-0515
Tip (+)
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.
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
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.
XLR RCA
Sleeve ( Ground)
+
+
+
+
+
2 ( + )
3 ( - )
1 ( )
+
-
-
-
-
--
L / R
BALANCED UNBALANCED
L / R
+ +

6
atlona.com Toll free: 1-877-536-3976
Local: 1-408-962-0515
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”.
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.

7
atlona.com Toll free: 1-877-536-3976
Local: 1-408-962-0515
The home screen tab will
display the general system
information.
The network set up page will allow the IP information to be changed. When a change is made the
screen will grey and the ability to save or cancel will display at the bottom.
Note: When DHCP is on, the IP address cannot be configured. Turn DHCP off to enable IP configuration.
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.
Login Mode has been added to provide a secure telnet login. Once Login Mode has been turned on
a username and password will be required on all IP connections to the switcher.
Note: Login mode should be in off position when the M2C-BAL is used with control systems that do not
support passwords. If your control system supports password protection, you can turn login mode
on. The GUI always requires a password.
Note: The username and password used in IP Login Mode will be the same login information as the
WebGUI.

8
atlona.com Toll free: 1-877-536-3976
Local: 1-408-962-0515
1. HDMI Output Audio - Sets what audio is outputted on the HDMI port
Pass through - Passes multi-channel audio to the HDMI port (input audio)
Insert - Embeds the down mixed audio onto the HDMI output signal
2. Audio Adjust Mode
Default - Factory neutral settings, cannot be controlled by RS-232 or TCP/IP
*Output gain will be 0 and EQ flat
Adjust - Allows the M2C-BAL output volume and EQ to be controlled through RS-232 or
TCP/IP
3. Volume Mute Control - Mutes or unmutes the output audio
4. Audio Output Mode - Switch between 2 channel and 1 channel audio output
Stereo - 2 Channel audio
Mono - 1 Channel audio
5. Default Mode Audio Out - Adjust audio output between balanced and unbalanced values
Balanced - +4 dBu balanced audio out
Unbalanced - Default is -10 dBu
6. Volume - Set output volume level
Range from -80 to 6
7. Bass - Set bass boost or cut
Range from -15 to 15
8. Treble - Set treble boost or cut
Range from -15 to 15

9
atlona.com Toll free: 1-877-536-3976
Local: 1-408-962-0515
The config page will allow the admin password to be changed, users to be added, and the RS-232 port to be
configured.
Note: User information will display for the admin only. Up to 3 users other than admin can be added.
Note: Only the admin password can be changed. The username will always remain “root”. If the admin
password is lost the system must be returned to factory settings and setup repeated.

10
atlona.com Toll free: 1-877-536-3976
Local: 1-408-962-0515
The EDID page enables the input preferred timing to be selected and HDCP compliance reporting
to be set.
*Sink - selects the preferred video resolution from the display to the source
*The preferred timings all include multichannel audio
Note: M2C-BAL protects HDCP encoded content and will not pass HDCP content to a non-HDCP compliant
device.
Note: Some devices flag all content as protected when connected to an HDCP compliant display. This
prevents what should be non-protected content from reaching devices (i.e. teleconference system)
through the M2C-BAL.
Note: When HDCP reports as non-compliant, only user created content is transmitted. Protected content
from all sources (ex. BluRay, AppleTV, etc) is blocked.
This function is controllable through RS-232 and TCP/IP.