Gefen GTV-AUDDEC-N User manual

www.gefentv.com
4x1 HD Switcher
w/ Audio Decoding
GTV-AUDDEC-N
User Manual

ASKING FOR ASSISTANCE
Rev A2
Technical Support:
Telephone [phone]
[phone]
Fax [phone]
Technical Support Hours:
8:00 AM to 5:00 PM Monday through Friday, Pacific Time
Write To:
Gefen, LLC
c/o Customer Service
20600 Nordhoff St
Chatsworth, CA 91311
[email protected]
www.gefentv.com
Notice
Gefen, LLC reserves the right to make changes in the hardware, packaging, and
any accompanying documentation without prior written notice.
4x1 HD Switcher w/ Audio Decoding is a trademark of Gefen, LLC
HDMI, the logo, and High-Definition Multimedia Interface are
trademarks or registered trademarks of HDMI Licensing in the United States and
other countries.
Manufactured under license from Dolby Laboratories.
Dolby, Pro Logic, and the double-D symbol
are registered trademarks of Dolby Laboratories.
© 2011 Gefen, LLC. All rights reserved.
All trademarks are the property of their respective owners.

CONTENTS
1 Introduction
2 Operation Notes
3 Features
4 Front Panel Layout
5 Front Panel Descriptions
6 Back Panel Layout
7 Back Panel Descriptions
8 IR Remote Layout and Descriptions
10 IR Remote Installation
11 IR Remote Configuration
12 Connecting the 4x1 HD Switcher w/ Audio Decoding
12 Wiring Diagram
13 Operating the 4x1 HD Switcher w/ Audio Decoding
13 Status Screen
13 Standby Mode and Power the Switcher
15 Adjusting the Volume
16 Changing the Audio Processing Mode
16 Accessing the Menu System
17 Menu System
17 Setting the Speaker Size
19 Setting the Speaker Level
21 Setting the Speaker Distance
23 Adjusting the Tone Control
25 Saving Audio Processing Favorites
30 Dynamic Range Compression
32 Audio Enhancement Modes
34 Setting the Unit of Measure
36 Setting the EDID Mode
38 Setting the IR Channel
40 Resetting the Switcher to Factory Settings
42 RS-232 Serial Control
43 RS-232 Serial Commands
69 Menu System Summary
69 Main Menu
71 Speaker Size Menu
72 Speaker Level Menu
74 Speaker Distance Menu
76 Tone Control Menu
77 Audio Setup Menu
79 Misc Setup Menu
81 Specifications
82 Warranty

1
Congratulations on your purchase of the 4x1 HD Switcher w/ Audio Decoding.
Your complete satisfaction is very important to us.
Gefen TV
Gefen TV is a unique product line catering to the growing needs for innovative
home theater solutions. We specialize in total integration for your home theater,
while also focusing on going above and beyond customer expectations to ensure
you get the most from your hardware. We invite you to explore our distinct
product line and hope that you find your solutions. Don’t see what you are looking
for here? Please call us so we can better assist you with your particular needs.
The Gefen TV 4x1 HD Switcher w/ Audio Decoding
The GefenTV 4x1 HD Switcher w/ Audio Decoding is a must-have preamp for
anyone wanting to create surround sound audio using multiple audio/video
inputs. It offers an easy-to-use alternative to over-complicated Home Theater
Receivers, while supporting 3DTV and the latest Blu-ray audio features. It
decodes digital multichannel surround-sound from up to four HDMI sources, or
by using S/PDIF and optical digital audio sources. Audio is output on six discrete
analog RCA jacks, ready for any multichannel audio power amplifier.
Dolby® Digital 5.1 (AC3), Dolby® Pro Logic II, LPCM 5.1, Dolby® TrueHD and
DTS-HD Master Audio™, and HDMI stereo and multichannel surround sound
audio formats are supported with up to six discrete channels. The front left and
front right channels offer bi-amplification capability to satisfy the most discerning
listeners. Advanced audio pre-processing insures an optimal surround sound
signal, and a bright LCD display guides operation, using the front-panel controls,
the included IR remote, or by an external control system via RS-232 control.
How It Works
Users can select audio from any one of four connected HDMI sources, both
digital audio inputs and a 2-channel analog audio input. A Blu-ray player, gaming
console, set-top box, DVD player, CD player and more can all be connected at
the same time. If an HDMI source is selected, video is delivered in HDMI format
to any HDTV display, and audio is delivered as 5.1 channel audio using standard
RCA connectors. The HDMI output supports 3DTV pass-through, making it ideal
for forward-proofing systems. It also supports digital audio-only sources, using
the digital and analog audio inputs, offering 5.1 channel analog audio outputs,
for high quality surround sound. Users can control all audio features using the IR
remote or front-panel buttons. An RS-232 port and 12V triggers allow interaction
with any home automation system for added convenience. When not in use, the
GefenTV 4x1 HD Switcher w/ Audio Decoding has a standby mode, eliminating
excessive power consumption.
INTRODUCTION

2
READ THESE NOTES BEFORE INSTALLING OR
OPERATING THE 4X1 HD SWITCHER W/ AUDIO DECODING
• The Digital Audio Decoder for HDMI has 8 RCA outputs. A maximum of 6
discrete channels of audio can be output via these connectors. 2 connectors
are available for bi-amping the front left and right channels.
• This product was intended for use with a separate audio amplifier. The RCA
output connectors on the rear panel will require the use of an audio amplifier
to produce adequate volume output.
• This unit will support the following audio formats:
LPCM (up to 6 channels)
Dolby Digital (AC-3 up to 6 channels)
Dolby Pro Logic
Dolby Pro Logic II
• This unit features multiple EDID (display information) modes which will
determine what audio formats can be used. For more information please see
page 36.
• This unit will accept sources that use Deep Color.
OPERATION NOTES

3
Features
• Supports resolutions up to 1080p and 1920 x 1200
• Switch between four HDMI sources and a single HDTV display
• Supports Dolby Digital 5.1 (AC3), Dolby Pro Logic II, LPCM HDMI direct (up
to 6 channels)
• Extracts encoded digital audio from HDMI, TOSLINK, or S/PDIF inputs
• Front Panel push-button controls
• RS-232 control
• IR Remote control
• 12 V trigger input for power amplifiers (turns unit on when 12V is received)
• 12 V, 50 mA trigger output (output is 12V when unit is on, 0V when unit is off)
• Save and recall user settings for each input
• Line level volume control
• Standby Mode
• Enclosure provides excellent heat dissipation and quiet operation
Package Includes
(1) 4x1 HD Switcher w/ Audio Decoding
(1) 6 ft. HDMI cable (M-M)
(1) IR remote control
(1) 24V DC power supply
(1) AC power cord
(1) User manual
FEATURES

4
Front Panel
FRONT PANEL LAYOUT
1 2
11
3
10 9
4
8 7
5
6
  

5
1 IR
This IR receiver will accept commands from the included IR Remote Control
Unit.
2 Input ◄
This button cycles through all video and audio inputs. For each video input,
audio may be selected from the embedded HDMI audio, or the coax, optical, or
L/R analog audio inputs.
3 Volume ▼
This button is used to decrease the volume level of the audio outputs when
not in the Menu System. While in the Menu System this button will cycle down
through the current level’s options.
4 Mode / OK
This button will change the audio processing mode. This button serves as a
confirmation button when using the Menu System.
5 Exit
This button is used to exit the current menu level and return to the previous/
parent level. This button will exit the entire Menu System when on the top most
level.
6 Power
Press this button to power ON the Switcher or place it in Standby mode.
7 Power Indicator
This LED will indicate the current power state. When the LED is red, the unit is
in standby mode. When the LED is green, the unit is on.
8 Menu
This button will activate the Menu System which is where all adjustment and
settings will be made.
9 Main LCD Display
This display will show pertinent status information and will be used to make
adjustments to features in the Menu System.
10 Volume ▲
This button is used to increase the volume level of the audio outputs when not
in the Menu System. While in the Menu System this button will cycle up through
the current level’s options.
11 Mute ►
This button will cycles between Mute-On and Mute-Off modes. When the
Mute-On mode is enabled, all audio output will be ceased. While in the Menu
System this button will cycle through available options in the right direction when
a feature has been selected for adjustment.
FRONT PANEL DESCRIPTIONS

6
BACK PANEL LAYOUT
Back Panel
11
2 31
12
4 65 7 8 9
10

7
BACK PANEL DESCRIPTIONS
1 Line Out (Front Bi-Amp)
Two RCA audio output connectors available for front-channel bi-amping
purposes. The output signal is identical to the Front L/R outputs.
2 Line Out (Surround, Sub, Front)
8 RCA-type audio outputs are available for connection to a separate amplifier.
Up to 6 discrete channels can be utilized.
3 Line In
L/R RCA-type audio inputs for analog audio.
4 Optical In
Use an optical cable to connect an external digital audio source to this TOSLINK
connector.
5 RS-232
This port is used to control functions and features using serial communications.
For more information on this feature please see page 42.
6 Ext IR
Connect an IR extender (Gefen Part No. EXT-RMT-EXTIR) to this port to
extend the IR range if this product.
7 Trigger Out
Provides 11.5 V DC when the Switch is powered ON. This trigger can be used
to control an external power amplifier, lights, curtains, etc.
8 Trigger In
Used to externally power the unit ON or OFF. This trigger will power ON the
Switcher when a 3 V - 12 V DC voltage is applied. If the existing voltage is
removed, then the Switcher is placed in Standby Mode (consumes less than <
1 W).
9 24V DC
Connect the included 24 V DC power supply to this power receptacle. Only use
the power supply that is included with this product.
10 HDMI In (1 - 4)
Use these ports to connect and switch between four HDMI devices.
11 HDMI Out
Connect an HDMI output device to this port.
12 Coax In
Use a coax audio cable to connect an external digital audio source to this
S/PDIF connector.

8
GTV-AUD-NIR IR Remote Control Unit
1 Mute
This button cycle between mute on and mute off modes. When mute is applied
there will not be any audio output.
2 Mode
This button functions the same as the Mode button on the front panel.
3 Enter
Confirms the current selection setting.
4 ◄(Cursor Left)
This button will navigate left when using the Menu System.
5 Exit
This button functions the same as the Exit button on the front panel.
6 ▼(Cursor Down / Decrease Volume)
This button will navigate down through options when using the Menu System
and will increase the volume when not in the Menu System.
7 L/R
Press this button to select the analog L/R audio input source. The current video
source will not change.
IR REMOTE DESCRIPTION
116
17
2
15
3
14
413
5 12
6
11
7
10
8
9

9
IR REMOTE DESCRIPTION
8 Coax
Press this button to select the S/PDIF audio input source. The current video
source will not change.
9 Optical
Press this button to select the S/PDIF audio input source. The current video
source will not change.
10 HDMI 1234
Press this button cycle between each of the HDMI input sources. The audio
output will follow the HDMI source.
11 Info / Test Tone
This button will display a series of information messages on the LCD screen
when pressed. When adjusting the Speaker Level, this button will activate
a test tone that is useful for adjusting the volume level of each speaker.
12 Enhance
This button will cycle through audio enhancement presets. See page 32 for
details on the available presets.
13 ►(Cursor Right)
This button will navigate right when using the Menu System.
14 Menu
This button will activate the Menu System which is where all adjustment and
settings will be made.
15 ▲(Cursor Up / Increase Volume)
This button is used to increase the volume level of the audio outputs when not
in the Menu System. While in the Menu System this button will cycle up through
the current level options.
16 Power
This button will toggle between the ON and STANDBY power states. An LED
status indicator will signify the current power state. A RED LED will be active
when the unit is in Standby power state. A GREEN LED will be active when the
unit is in the ON power state.
17 Activity Indicator
This LED will be activated momentarily each time a button is pressed.
NOTE: An Activity Indicator that flashes quickly while holding
down any one of the 16 buttons indicates a low battery. Replace
the IR Remote Control battery as soon as possible.

10
IR REMOTE INSTALLATION
Installing the Battery
1. Remove the battery cover on the back of the IR Remote Control Unit.
2. Insert the included battery into the open battery slot. The positive (+) side of
the battery should be facing up.
3. Replace the battery cover.
The Remote Control unit ships with two batteries. One battery is required for
operation and the other battery is a spare.
WARNING: Risk of explosion if battery is replaced by an
incorrect type. Dispose of used batteries according to the
instructions.
Battery Slot
(shown with battery)

11
IR REMOTE CONFIGURATION
Corresponding DIP Switch Settings for each IR Channel
It is important that the IR channel on the Remote Control unit, matches the IR
channel set on the 4x1 HD Switcher w/ Audio Decoding. For example, if both
DIP switches on the IR Remote Control unit are set to IR channel 0 (both DIP
switches down), then the 4x1 HD Switcher w/ Audio Decoding must also be set
to IR channel 0. See page 38 on how to change the IR channel on the 4x1 HD
Switcher w/ Audio Decoding.
IR Channel 0
(default)
1 2
ON
How to Resolve IR Code Conflicts
In the event that IR commands from other remote controls interfere with the
supplied IR Remote Control unit, changing the IR Remote Control’s IR channel
will fix the problem. The IR Remote Control unit has a bank of DIP switches used
for setting the IR channel. The DIP switch bank is located underneath the battery
cover.
Left: Picture of the
opened rear battery
compartment of the IR
remote showing the
exposed DIP Switch
bank between the
battery chambers.
IR Channel 2
1 2
ON
IR Channel 3
1 2
ON
IR Channel 1
1 2
ON
1 2
Le
op
co
r
e
m
ex
ba
b
a

12
CONNECTING THE
4X1 HD SWITCHER W/ AUDIO DECODING
How to Connect the 4x1 HD Switcher w/ Audio Decoding
1. Connect up to four HDMI source devices to the HDMI input ports of the
4x1 HD Switcher w/ Audio Decoding using the included HDMI cables.
2. Optionally, connect additional audio sources to the Switcher using Optical,
Coaxial, and L/R RCA cables.
3. Connect the Digital Audio Decoder to an amplifier using the RCA connectors
on the rear panel. The following RCA connectors are available:
• Front Left
• Front Left (for bi-amping)
• Front RIght
• Front Right (for bi-amping)
• Center
• Left Surround
• Right Surround
• Subwoofer
4. Connect an HDMI output device to the HDMI output using an HDMI cable.
5. Connect the included 24 V DC power supply to the power receptacle on the
Switcher. Connect the AC power cord to an available electrical outlet.
Wiring Diagram for the 4x1 HD Switcher w/ Audio Decoding
HDMI CABLE
L/R STEREO AUDIO CABLE
TOSLINK AUDIO CABLE
S/PDIF AUDIO CABLE
RS-232 CABLE
SPEAKER CABLE
TRIGGER CABLE
GTV-AUDDEC-N
SL
Subwoofer
EXT-PACS
(Professional Automation Control System)
Amplifier HDMI Display
Electronic Screen
Digital Audio CD Player
MP3 Player
Home Theater PC
Game Console
Cable Box
Blu-ray Player
GTV-AUDDEC-N
L
C
R
SR
STOP 1080p [DII]
SURROUND SOUNd
chp 4
VIDEO GAME MODE
Playing: SCALER WARS
LEVEL: 22
VIDEO GAME MODE
Playing: SCALER WARS
LEVEL: 22
Playing: SCALER WARS
LEVEL: 22
EISBRECHER
TRACK 2
GTV-AUDDEC-N
EXT PA
CS
ATTENTION: This product should always be connected to a
grounded electrical socket.

13
OPERATING THE 4X1 SWITCHER W/ AUDIO DECODING
Status Screen
The Status Screen displays information regarding the current settings of the
Switcher. The Status Screen is also used in conjunction with navigating the
built-in Menu System.
After powering on the Switcher, the Standby Screen will be displayed. The
Standby Screen indicates the currently selected A/V input, the current volume
setting, the audio input format, and the audio processing mode:
Standby Mode and Powering the Switcher
Once the power supply is connected and the AC power cord is connected to an
available electrical outlet, the Power Indicator will glow bright red. When the
Power Indicator is red, the Switcher is Standby Mode.
To power-on the Switcher, press the Power button on the front panel or use the
Power button on the IR Remote Control. The power indicator, next to the Power
button, will glow bright green.
A/V Input
Displays the currently selected
Audio and Video inputs
Audio Gain
Displays the audio
gain (volume)
Audio Mode
Displays the current audio
processing mode
Input Format
Displays the
audio input format

 
Standby Mode
(Red LED)
Switcher Active
(Green LED)



14
OPERATING THE 4X1 SWITCHER W/ AUDIO DECODING
Selecting the Input Source
Press the Input ◄button to cycle through each input source. The table below
lists which inputs are active for each selection.
This Switcher has four HDMI inputs (1 - 4) and three options for audio (coax,
optical, and analog stereo). The following table lists the available video and
audio inputs.
Display Video Audio Display Video Audio
H1_HD HDMI In 1 HDMI H3_HD HDMI In 3 HDMI
H1_CX Coax H3_CX Coax
H1_OT Optical H3_OT Optical
H1_LR Analog L/R H3_LR Analog L/R
H2_HD HDMI In 2 HDMI H4_HD HDMI In 4 HDMI
H2_CX Coax H4_CX Coax
H2_OT Optical H4_OT Optical
H2_LR Analog L/R H4_LR Analog L/R
The currently displayed A/V input is abbreviated in the Status Screen, using the
following form:
[HDMI Input_Audio Source], where:
H1, H2, H3, and H4 is an HDMI input on the back panel of the Switcher.
And CX = Coax (S/PDIF), and OT = Optical (TOSLink) are audio inputs on the
back panel of the Switcher. The HD suffix means that the embedded HDMI audio
is being used.
A/V Input
Displays the currently
selected A/V input

 

15
OPERATING THE 4X1 SWITCHER W/ AUDIO DECODING
Adjusting the Volume
Use the Volume ▲and Volume ▼buttons to increase or decrease the audio
output gain. The ▲or ▼buttons on the IR Remote Control can also be used to
control the audio output gain. Audio gain can be reduced to a minimum of -60 dB
and to a maximum of +10 dB. Each time these buttons are pressed, the volume
is increased or decreased by 1 dB.
To increase or decrease the audio gain at a faster rate, press and
hold down either of these buttons until the desired volume is
achieved.
Muting the Audio Output
Use the Mute button on the front panel or on the IR Remote Control to mute the
audio output. The display will indicate if the audio is muted. To disable the mute
function, press the Mute button again. The Volume ▲and Volume ▼buttons
can also be used to disable muting.
Indicates
Audio is muted
Mutes
Audio Output

 
Current
Volume
Increase
Volume
Decrease
Volume

 

16
OPERATING THE 4X1 SWITCHER W/ AUDIO DECODING
Changing the Audio Processing Mode
Successively press the Mode / OK button on the front panel to cycle through the
different audio processing modes. The Mode button on the IR Remote Control
can also be used to cycle through the audio modes.
See page 25 for a description of each of the available audio processing modes.
Main Menu
To access the Menu System, press the Menu button on the front panel. The
front-panel display will change:
Press the Volume ▲or Volume ▼button to cycle through the different sub-
menus. Press the Mode / OK button to access the currently displayed
sub-menu. Press the Exit button to return to the Main Menu.
Displays
current audio
mode
Press to change
audio mode

 
Press to display
Menu system
Current
Sub-menu
Press to
access
sub-menu
Press to
return to
Main Menu



17
MENU SYSTEM
Using the Menu System
The 4x1 HD Switcher w/ Audio Decoding comes with a built-in menu system
which provides control over additional audio features. The following examples
demonstrate some of the more common features of the Switcher.
Setting the Speaker Size
Adjusting the speaker size determines how each speaker handles low frequency
bands. All speakers except the front left and right channels have an option
to disable the use of that channel. If the center, read surround, or subwoofer
channels are not going to be used there speakers should be set to the OFF
setting. Source audio that uses these channels will be properly mixed to the
other available speakers. A full summary of the Menu System can be found
starting on page 69.
Using the front-panel buttons
1. Press the Menu button. The front-panel display will change to display the
Speaker Size menu:
2. Press the Mode / OK button. The front-panel display will show the Front
Left / Front R speaker size:
3. Press the Mute ►or Input ◄button to change the speaker size.
4. Use the Volume ▲or Volume ▼buttons to change the size of the Center,
Surround Left / Surround Right, and Subwoofer speakers.
5. Press the Exit button to save the changes and return to the Speaker Size
menu.







