Merging MERGING+NADAC Reference Manual
REFERENCE GUIDE
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Table of Contents
Important Safety and Installation Instructions .......................................................................................... 3
Declaration of Conformity ..................................................................................................................... 7
NADAC Warranty Information ................................................................................................................... 8
Before you do anything else please read this page ................................................................................... 9
MERGING+NADAC Network Attached D/A Converter ......................................................................... 9
What’s in the Box ................................................................................................................................... 9
Introduction to the MERGING+NADAC .................................................................................................... 10
The MERGING+NADAC Network Attached D/A Converter ................................................................ 10
Environmentally Friendly by Design .................................................................................................. 10
Key Features ........................................................................................................................................ 10
The MERGING+NADAC: Two Versions ............................................................................................... 10
About RAVENNA .................................................................................................................................. 11
MERGING+NADAC Hardware ............................................................................................................. 12
Front Panel ....................................................................................................................................... 12
Back Panel – 2-Channel version (ST2) .............................................................................................. 12
Back Panel – 8 Channel version (MC8)............................................................................................. 12
Specifications ...................................................................................................................................... 14
How to Connect the MERGING+NADAC .................................................................................................. 17
Connecting the RAVENNA Ethernet cable to the Network input .................................................... 17
Connecting the NADAC using AES/EBU and SPDIF digital interfaces ............................................... 17
Connecting the word clock input ..................................................................................................... 18
How to connect the balanced line output to an unbalanced input ................................................. 19
Power Supply ........................................................................................................................................... 20
Power supply options....................................................................................................................... 20
Using an AC power source ............................................................................................................... 20
Using a DC power source ................................................................................................................. 20
Switching on your MERGING+NADAC ......................................................................................................
21
MERGING+NADAC Front Panel Display Interface .................................................................................... 22
MERGING+NADAC Menu Tree ............................................................................................................ 22
Dual Zone Capability ........................................................................................................................... 25
Navigating the Menu .......................................................................................................................... 23
Rotary Control Function Overview ..................................................................................................... 23
Home Screen Explanation ................................................................................................................... 25
Screen item descriptions ..................................................................................................................... 25
The Quick Menu .................................................................................................................................. 25
The Main Menu .................................................................................................................................... 28
Sources menu .................................................................................................................................. 28
Trim/Polarity menu ......................................................................................................................... 30
System Menu ................................................................................................................................... 31
Network Menu ................................................................................................................................. 35
Info Menu......................................................................................................................................... 37
Exit Menu ......................................................................................................................................... 38
Synchronizing the MERGING+NADAC to an External Source .................................................................. 40
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Connecting the MERGING+NADAC to a Network .................................................................................... 41
Basic Network Configuration ............................................................................................................... 41
Advanced Network Configuration ....................................................................................................... 44
Home networks and Gigabit assistance .............................................................................................. 48
NADAC Driver Installation and Configuration .......................................................................................... 49
MERGING+NADAC ASIO Driver for Windows ...................................................................................... 49
MERGING+NADAC Core Audio Driver for MAC OS X ........................................................................... 53
The NADAC App: MERGING+NADAC Remote Control ............................................................................ 59
To launch the MERGING+NADAC Ap from Windows .......................................................................... 60
To launch the MERGING+NADAC Ap from Mac OS X .......................................................................... 61
To launch the MERGING+NADAC Ap from Apple iOS for iPad and iPhone ......................................... 62
Troubleshooting Guide ............................................................................................................................ 65
Media player configuration recommendations ................................................................................... 65
MERGING+NADAC Discovery or RAVENNA I/O connection problems ................................................ 65
Other trouble shooting information .................................................................................................... 65
Appendix 1. MERGING+NADAC Web Control Interface.......................................................................... 66
Appendix 2: MERGING+NADAC Firmware Update Guide ....................................................................... 69
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Important Safety and Installation Instructions
SAVE THESE INSTRUCTIONS
INSTRUCTIONS PERTAINING TO RISK OF FIRE, ELECTRIC
SHOCK, OR INJURY TO PERSONS
WARNING – when using electrical products, basic precautions should be followed, including the following:
1. Before using this product, read all of the safety and installation instructions and the explanation of graphic
symbols.
2. This product must be grounded otherwise it could malfunction or breakdown. Grounding provides a path of
least resistance for electric current to reduce the risk of electric shock. This product is equipped with a power
supply cable having an equipment-grounding conductor and a grounding plug. The plug must be plugged
into an appropriate outlet, which is properly installed and grounded in accordance with all local codes and
ordinances.
DANGER – Improper connection of the equipment grounding can result in a risk of electric shock. Do not
modify the plug provided with the product – if it will not fit the outlet have a proper outlet installed by a
qualified electrician. Do not use an adapter that defeats the function of the equipment-grounding conductor.
If you are in doubt as to whether the product is properly grounded, check with a qualified serviceman or
electrician.
3. Do not use this product near water or in a damp environment, for example, near a bathtub, washbowl,
kitchen sink, in a wet basement, or near a swimming pool, or the like.
4. This product, either alone or in combination with an amplifier and speakers or headphones, may be capable
of producing sound levels that could cause permanent hearing loss. Do not operate at a high volume level or
at a level that is uncomfortable. If you experience any hearing loss or ringing in the ears, you should consult an
audiologist.
5. The product should be located so that its location or position does not interfere with its proper ventilation.
6. The product should be located away from heat sources such as radiators or other products that produce
heat.
7. The product should be connected to a power supply only of the type described in the operating instructions
or as marked on the product.
8. The product’s power-supply cable should be unplugged from the outlet when it is to be left unused for a
long period of time. When unplugging the power supply cable, grasp it by the plug. Do not pull on the cable
itself.
9. Care should be taken so that objects do not fall on to the product and liquids are not spilled onto any part of
the enclosure.
10. The product should be serviced by qualified service personnel when: a. The power supply cable or plug
has been damaged. b. Objects have fallen onto the product, or liquid has spilled and may have leaked into the
product. c. The product has been exposed to rain. d. The product does not appear to be operating normally
or exhibits a marked change in performance. e. The product has been dropped, or the enclosure damaged.
11. Do not attempt to service the product beyond that described in the user maintenance instructions. All
other servicing should be referred to qualified service personnel.
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12. WARNING - Do not place any objects on the power supply cable, or place the product in a position where
anyone could trip over, walk on, or roll anything over the cable. Do not allow the product to rest on or be
installed over cables of any type. Improper installations of this type create the possibility of a fire hazard
and/or personal injury.
The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert
the user to the presence of uninsulated "dangerous voltage" within the product's enclosure
that may be of sufficient magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user to the presence
of important operating and maintenance (servicing) instructions in the literature
accompanying the product.
IMPORTANT NOTICE:
Please read the following information very carefully before attempting any installation. Failure to comply with
the precise instructions may result in damage to your Merging hardware. Please read this entire section of the
manual carefully before installation.
STATIC ELECTRICITY DANGER NOTICE:
Please note that the NADAC contains delicate electronic components that can be damaged or even destroyed
when exposed to static electricity. Take all necessary precautions not to discharge static electricity into the
equipment when touching any of the NADAC connectors.
Merging Technologies makes no warranties express or implied regarding the NADAC embedded software, its
quality, performance, merchantability or fitness for a particular purpose. The software is supplied “as is” and
you, the purchaser, are assuming the entire risk of the results of using this Merging Technologies software.
In no circumstances will Merging Technologies, its owners, directors, officers, employees or agents be liable to
you for any consequential, incidental or indirect loss or damages including loss of time, loss of business, loss of
profits, loss of data or similar resulting from the use of or inability to use the Merging Technologies hardware
and or software or for any defect in the hardware software or documentation.
© Copyright Merging Technologies Inc. 2016. All rights reserved.
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Product Regulatory Compliance
Product Safety and EMC Compliance
The Merging Technologies NADAC Network Converter is designed, tested and verified to comply with the
following Safety and EMC regulations:
FCC – Radiated and Conducted Emissions (USA).
CFR 47 Part 15 – Radiated and Conducted Emissions (Canada).
CISPR 22:2008 (class B) – Radiated and Conducted Emissions (International).
CISPR 32:2012 (class B) – Radiated and Conducted Emissions (International).
CISPR 24:2010 – Immunity (International).
EN 55022:2010 (class B) – Radiated and Conducted Emissions (European Union).
EN 55032:2012 (class B) – Radiated and Conducted Emissions (European Union).
EN 55024:2010 – Immunity (European Union).
EN61000-3-2 & -3 – (Power Harmonics and Fluctuation and Flicker).
Electromagnetic Compatibility Notices
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)
this device may not cause harmful interference and (2), this device must accept any interference received,
including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may cause harmful interference to
radio communications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the interference by
one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and the receiver.
Connect the equipment to an outlet on a circuit other than the one to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
Any changes or modifications not expressly approved by the grantee of this device could void the user’s
authority to operate the equipment. The customer is responsible for ensuring compliance of the modified
product.
Only peripherals (computer input/output devices, Ethernet switches, terminals, printers, etc.) that comply with
FCC Class B limits may be attached to this computer product. Operation with noncompliant peripherals is
likely to result in interference to radio and TV reception.
All cables used to connect to peripherals must be shielded and grounded. Operation with cables, connected
to peripherals that are not shielded and grounded, may result in interference to radio and TV reception.
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Environmental Limits
System Office Environment Parameter Limits
Operating Temperature +5 degrees C to +45 degrees C with the maximum rate of change not to exceed 10
degrees C per hour.
Non-Operating Temperature -40 degrees C to +70 degrees C
Non-Operating Humidity 95%, non-condensing @ 30 degrees C
Operating Shock No errors with a half sine wave shock of 2G (with 11-millisecond duration).
Package Shock Operational after a free fall, 60 cm depending on the weight.
ESD 8kV per Merging Technologies Environmental Test Specification
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Declaration of Conformity
According to
EMC Directive 2004/108/EC
Product MERGING+NADAC
Manufacturer Merging Technologies SA
Le Verney 4
CH-1070 Puidoux
Switzerland
Electrical Rating 90-260 VAC, 50/60 Hz, 0.2 A (at 230V)
Standards EN 55022:2010, EN 55032:2010, EN 55024:2010, EN61000-3-2 &
-3, CISPR 22:2008, CISPR 32:2012, CISPR 24:2010
Detailed specifications of the tested and certified product are shown in the following
Test Report:
Test report Ref No: 15-MO-0081.E01/E02
Issued Date: June 2015 by Electro Suisse | Montena EMC SA
The CE label is affixed on the bottom of the MERGING+NADAC unit as per below:
Date 19 June 2015
Claude Cellier
President
Merging Technologies S.A.
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NADAC Warranty Information
This product is warranted to be free of defects in materials and workmanship for a period of three years from
the date of purchase. Merging Technologies, Inc. extends this Limited Warranty to the original purchaser.
In the event of a defect or failure to confirm to this Limited warranty, Merging Technologies, Inc. will repair or
replace the product without charge within sixty (60) days. In order to make a claim under this limited
warranty, the purchaser must notify Merging Technologies, Inc. or their representative in writing, of the
product failure. In this limited warranty the customer must upon Merging Technologies, Inc. request, return
the product to the place of purchase, or other local designation, for the necessary repairs to be performed. If
the consumer is not satisfied with the repair, Merging Technologies, Inc. will have the option to either attempt
a further repair, or refund the purchase price.
This warranty does not cover: (1) Products which have been subject to misuse, abuse, accident, physical
damage, neglect, exposure to fire, water or excessive changes in the climate or temperature, or operation
outside maximum rating. (2) Products on which warranty stickers or product serial numbers have been
removed, altered or rendered illegible. (3) The cost of installations, removal or reinstallation. (4) Damages
caused to any other products. (5) Do not attempt to service the equipment. There are no user serviceable parts
inside*. Please refer all servicing to an authorized Merging Technologies sales partner. Any attempt to service
the equipment will expose you to a risk of electric shock, and will void the manufacturer’s warranty.
* Replacing or adding hardware components is permitted under the supervision of a Merging Technologies sales
partner. Any other modification will void the NADAC warranty.
Contacting Merging Technologies
International Office:
Merging Technologies S.A.
Le Verney 4
CH-1070 Puidoux
Switzerland
Phone: +41 21 946 0444
Fax: +41 21 946 0445
For all documentation inquiries or suggestions for improvement:
www.merging.com
© 2016 All rights reserved. Merging Technologies and MERGING+NADAC are registered Trademarks of
Merging Technologies SA.
Product features and specifications are subject to change without notice.
Merging Technologies SA shall not be liable for technical or editorial errors contained herein, nor for incidental
or consequential damages resulting from the furnishing, performance or use of this manual.
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Before you do anything else please read this page
MERGING+NADAC Network Attached D/A Converter
Thank you for purchasing the MERGING+NADAC audiophile D/A converter. This high performance product
has a wide range of advanced features and has been designed to be as easy to use as possible. Before
attempting to use your MERGING+NADAC, we strongly recommend that you read this manual, as it will enable
you obtain the best performance from it.
What’s in the Box
If the shipping carton shows any signs of damage, please inform your Merging Technologies dealer, as the
product may also have sustained damage. Please retain all the packing, as this must be used should you need
to ship the unit in the future. The use of any other packing may result in the unit sustaining damage in transit,
which will not be covered by the warranty.
In addition to the user manual, the carton should contain the items shown in Figure 1. If any of these is
missing please contact your Merging Technologies dealer.
MERGING+NADAC
Quick Start Guide
RAVENNA Ethernet cable
Power cable
Please check that the power cable is fitted with the correct plug for the power outlet it will be
connected to. If the wrong cable has been supplied, do not attempt to modify it. Contact your
Merging Technologies dealer for a replacement.
Figure 1. Items inside the box.
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Introduction to the MERGING+NADAC
The MERGING+NADAC Network Attached D/A Converter
The MERGING+NADAC audiophile D/A converter has been developed from our professional high-resolution
D/A converter and shares the same technology. It was designed in Switzerland, where it is assembled and
tested to the same exacting standards as our professional products and is intended to deliver the same high
level of performance and reliability. It can accept PCM data at sample rates up to 384kHz and 24-bit resolution
and also DSD data, in DSD64, DSD128 and DSD256 formats. The NADAC+NADAC can function as a standalone D/A converter, but can also be connected to a network using Ethernet, where it can provide
considerable additional functionality and be remotely controlled via the network. The Ethernet interface is
exceptionally resistant to disturbances caused by RFI and EMI and has the additional advantage that cable
runs of up to 100m may be employed. It uses a professional protocol called RAVENNA to manage the data
transfer and this ensures a very high level of data integrity and a timing accuracy of 1 nanosecond.
Environmentally Friendly by Design
The MERGING+NADAC has been carefully designed in order to keep power consumption to a strict minimum.
Merging Technologies believes in a sustainable future and takes appropriate measures at all phases of a
product's design and manufacture to avoid wasting energy. This said, we will never compromise on sound
quality and electronic components are carefully selected based on their audio performance first and foremost.
The side benefit is that if equipment runs cool it is usually also guarantee of longevity and long-term reliability.
Key Features
• Accepts 44.1kHz – 384kHz PCM at 24-bit resolution, DXD, DSD64, DSD128 and DSD256.
• SPDIF (RCA and Toslink) and AES/EBU inputs for conventional digital sources.
• Ethernet with RAVENNA interface allows asynchronous data transfer with computer audio systems and
allows cable runs up to 100m with Cat6 cable.
• Connects from the computer using standard ASIO on Windows and Core Audio on Mac.
• Multiple MERGING+NADACs can be connected to the network.
• Web based remote control accessible via smartphone, tablet or computer.
• The remote allows control of volume level and source selection of any MERGING+NADAC on the network.
• Front panel multifunction Rotary Control allows easy adjustment of volume level.
• The Rotary Control also provides access to a comprehensive and intuitive menu.
• Two front panel mounted headphone sockets enable connection without the use of adapters.
The MERGING+NADAC: Two Versions
STEREO (ST2)
This employs an ESS Sabre ES9008S Reference D/A converter IC, which contains 8 individual D/A converters. In
the stereo unit 4 of these converters are merged to drive each output channel, providing improved linearity,
greater dynamic range and a lower noise floor.
MULTICHANNEL- 8 (MC8)
In this version, each of the ESS Sabre ES9008S IC’s D/A converters drives an individual output channel. A
simple menu setting allows this unit to be configured to work as a stereo unit in exactly the same way as the
ST2 version, with the same advantages in performance.
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About RAVENNA
RAVENNA is the name of the protocol that manages the data transfer between the MERGING+NADAC and a
computer or other hardware when the Ethernet interface is used. This open and published IP network
technology had been created to meet the demands of national broadcasters and focused on the essential
requirements of extremely accurate clocking, high resistance to packet loss and very low latency i.e. getting
the data to where it needs to be, intact and at the right time.
Initially it did not encompass high PCM sampling rates and certainly not DSD. However, it was not difficult to
make changes to allow that, so Merging Technologies worked closely with the developers to make sure that
sufficient channels for the requirements of our professional equipment, with the very high data rate required
by DSD256, could be handled with an accuracy that exceeded anything previously available. It remains the
only logical choice for the professional and the audiophile and is now available in the MERGING+NADAC. The
added bonus to using an advanced networking solution is being able to send and receive control information
as well as audio data. This opened up exciting possibilities in the studio and now you can enjoy these same
benefits in your own home, as in a networked system using multiple MERGING+NADACs, the remote control
command data, as well as the audio data are passed to the units via the network.
COMPATIBILITY
The RAVENNA protocol comes with absolutely standard drivers for any computer operating system. ASIO for
Windows, Core Audio with DoP support for MacOS and ALSA for Linux. As easily installed and configured as
any other driver for USB or Firewire, the MERGING+NADAC RAVENNA driver allows use of any application of
your choice to playback your music files, Emotion, Roon, JRiver, Audirvana, iTunes, etc., as well as any music
server or streamer able to communicate through those standard ASIO or Core Audio drivers.
Using RAVENNA IP audio, the MERGING+NADAC can connect to a standard network, using off the shelf Gigabit
switches and other IT technology to become a node on a LAN. From that point, any other RAVENNA node can
receive information from and deliver information to, any combination of RAVENNA devices on the network.
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MERGING+NADAC Hardware
Front Panel
Back Panel – 2-Channel version (ST2)
Back Panel – 8 Channel version (MC8)
Figure 3. 2-Channel version (ST2) back panel.
Figure 2. MERGING+NADAC front panel.
Figure 4. 8-Channel version (MC8) back panel.
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Note: The back panel of the stereo version (ST2) is identical to the MC8 with the exception that it only has 2 sets of
balanced and unbalanced analogue outputs instead of 8.
Figure 6. MERGING+NADAC (MC8) back panel detail.
Figure 5. MERGING+NADAC front panel detail.
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Specifications
Enclosure Specifications
Case Material Premium machined and anodized aluminium
Weight 11 kg / 33 lbs
Dimensions 435 x 435 x 95 mm
Power Supply Voltage (AC) 100V–240V, 47–63 Hz
Power Supply Voltage (DC) 10-14V (via Hirose HR10A-7R-4S connector)
Power Consumption (Max) < 30 Watts
Front Panel Display OLED (160 x128 pixels)
Balanced Analog Outputs
Connector type Gold plated male XLR
Max output Level +18.0 dBu (6.1 Vrms)
Output Impedance 40 Ω
Dynamic Range - ST 2 130 dB (A-weighted, typ.)
Dynamic Range - MC 8 124 dB (A-weighted, typ.)
THD+N @1 kHz - ST 2 -116 dB (0.00016 %)
THD+N @1 kHz - MC 8 -113 dB (0.00022 %)
Gain Range (software controlled) - ∞ dB to 0 dB
Gain Step/Precision 1dB / ±0.05 dB
Unbalanced Analog Outputs
Connector type Gold plated RCA jack
Max output Level +8.8 dBu (2.1 Vrms)
Output Impedance 20 Ω
Dynamic Range - ST 2 123dB (A-weighted, typ.)
Dynamic Range - MC 8 120 dB (A-weighted, typ.)
THD+N @1 kHz - ST 2 -114 dB (0.0002 %)
THD+N @1 kHz - MC 8 -113 dB (0.00022 %)
Gain Range (software controlled) - ∞ dB to 0 dB
Gain Step/Precision 1dB / ±0.05 dB
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Headphone Monitor Outputs
Headphone Jacks 6.3 mm(1/4”) x 1 and 3.5mm x 1
Max output Level (Unbalanced) Load = 300 Ohms: +14.4 dBu
Output Impedance 40 Ω
Dynamic Range (A-weighted, typ.) 123 dB
THD+N (1 kHz) @ -2 dBFS < -111 dB (0.00028 %)
Gain Range (software controlled) - ∞ dB to 0 dB
Gain Step/Precision 1dB / ±0.05 dB
RAVENNA module
RAVENNA (GbE) RJ45
Sample Rates 44.1 kHz – 384 kHz, DSD64, DSD128 and DSD256
AES-EBU input
Connector Gold plated female XLR
AES Input Grounded and transformer coupled
Input Impedance 110 Ω
Sample Rates 44.1 kHz – 192 kHz
SPDIF inputs
Optical Connector Toslink
Coaxial Connector Gold plated RCA
Coaxial Input Impedance 75 Ω
Sample Rates 44.1 kHz – 96 kHz
Wordclock Input
Connector BNC
Input Impedance 75 Ω
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Software Specifications
Windows Driver/OS ASIO 2.2
Win7-64bit / Win8.1-64bit / Win10-64bit
Mac Driver/OS NADAC Core Audio.
MacOS 10.8.5 or higher (Intel)
Linux Driver/OS ALSA
Please contact Merging Technologies for detail
on supported specific Linux versions and build
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How to Connect the MERGING+NADAC
Connecting the RAVENNA Ethernet cable to the Network input
The Network input uses an RJ45 female receptacle with an EtherCon locking connector - Figure 7. A standard
Cat5e or Cat6 cable can be used, however we recommend that the EtherCon cable provided with the
MERGING+NADAC be used. If a longer cable is required this can be ordered from your Merging Technologies
dealer. To connect the cable to the unit, align the cable with the Network input so that the small slot in the
EtherCon connector body is facing upwards, then push the connector home until the lock clicks. The remove
the cable, grasp the EtherCon cable connector body and push the tab above the Network input connector
down to release the lock, then withdraw the connector. Do not pull on the cable. If the lock release tab is not
pushed down sufficiently, the cable cannot be removed
.
Connecting the NADAC using AES/EBU and SPDIF digital interfaces
The NADAC also has one AES/EBU and two SPDIF digital interfaces to allow it to be connected to sources such
as CD players and CD transports. These inputs are on the rear panel adjacent to the Network input - Figure 6.
The AES/EBU input uses an XLR type connector. One SPDIF input uses an RCA type connector and the other a
TOSLINK type optical connector.
When using the electrical inputs, for the best results only cables that have been specifically designed to
comply with the AES/EBU or SPDIF standards should be used. Other cables will probably work, but may not
give the best performance.
Figure 7. Ravenna Ethernet cable.
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Connecting the word clock input
All of the MERGING+NADAC’s digital processes have to work in synchronization to ensure their proper
function. In the normal mode of operation this is achieved using a synchronizing signal generated by the
unit’s own internal clock circuit. The MERGING+NADAC may also be used with an external synchronization
source, which is called a Word Clock generator. This is connected to the Word Clock input connector located
on the rear panel just below the AES/EBU digital input - Figure 6.
To connect the MERGING+NADAC to a word clock generator you will require a cable fitted with male BNC to
BNC connectors. The cable should also have a characteristic impedance of 75 Ω.
To connect the cable, offer it up so that the two diametrically opposed pins on the outside of the rear panel
connector, fit into the corresponding grooves in the inside of the cable connector’s locking ring. Push the
cable in and turn the locking ring clockwise so that it locks firmly. To remove the BNC cable, push the cable
connector forward slightly and turn it anti-clockwise as far as it will go. The cable may now be removed from
the unit.
Before attempting to use the unit with an external clock source please see the section Synchronizing the
MERGING+NADAC to an External Source on page 40. Please also be aware the word clock input has a 75Ω
terminating resistor that can be switched in and out of the circuit via the WCK Termination page in the System
menu – see page 33. Failing to set this appropriately may compromise the unit’s performance.
Figure 8. BNC to BNC cable.
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How to connect the balanced line output to an unbalanced input
We strongly recommend that you use the RCA output connectors when connecting the MERGING+NADAC to
an unbalanced input.
If you must connect the MERGING+NADAC to an unbalanced input using the balanced outputs, you must do
so as shown in Figure 9 below.
Never attempt to short pin 3 (or pin 2) to Ground on the MERGING+NADAC’s balanced output, as the
balanced output circuit is symmetrical, but not floating. Failure to observe this instruction may result
in damage to the MERGING+NADAC, which will not be covered by the warranty.
Note: As unbalanced inputs are usually more sensitive than balanced inputs, the 6dB drop in signal level that
results when using only one half of the balanced output will reduce the likelihood of overdriving the unbalanced
input of the device that the MERGING+NADAC is connected to. This could otherwise cause distortion.
Figure 9. Correct balanced output to unbalanced input connection method.
Figure 10. Incorrect balanced output to unbalanced input connection method.
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Power Supply
Power supply options
Your MERGING+NADAC can be powered from a standard domestic AC supply, or an external DC power source
such as a battery.
Using an AC power source
The MERGING+NADAC can be run from any AC power source that supplies 100-240V at 50-60 Hz. Ensure that
the maximum power supply voltage is not exceeded, as excessive voltages can seriously damage the unit. We
recommend that you use the power supply cable supplied with the unit and this must be plugged into a
grounded outlet.
For safety and EMC reasons, and to prevent audio hum, the system must be properly grounded. If
your power source does not have a standard three-prong socket, the system must be grounded in
another appropriate manner. Please consult an appropriately qualified electrician if you are unsure about the
suitability of the power outlet you propose to use.
Using a DC power source
The MERGING+NADAC may also be run from a DC power source. This should be connected to the DC Input
connector on the rear panel, immediately to the left of the AC power inlet – Figure11. The mating part for this
connector is a Hirose HR10-7P-4P, which can be ordered separately from your Merging Technologies reseller.
The pinout of this connector is:
• Pin 1: Ground
• Pin 4: 12V
• Pins 2 and 3: Not connected
The DC power input accepts voltages from 10V to 14V, with a maximum power consumption of 30W.
Do not exceed the maximum DC input voltage or the unit may be damaged.
The DC power supply input can be used in two ways
1. DC power as the main source using a battery or other suitable DC source.
2. Backup power supply: The unit is operated with both AC and DC supplies connected. Should either
fail or be disconnected, the unit will carry on working without any disturbance to its operation.
Figure 11. DC power input connector.
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Switching on your MERGING+NADAC
1. Make sure that the switch on the unit’s rear panel power inlet is set to the On position, as shown in
Figure 12.
2. Briefly press the front panel power button – Figure 13.
3. The periphery of the power button will light up in white and the unit will commence the boot-up
sequence, which will take approximately 60 seconds. During this time the unit will perform a series of
self-test and initialization routines.
Note: If the front panel power button light isn’t steady, but appears to flicker, this may indicate a fault condition and
the unit should be switched off. If you cannot switch the unit off using the Shutdown command in the Exit menu
(page 38), press and hold down the power button until the unit switches off.
4. When the display shows the Main output home screen, the unit is ready for use. Figure 14 shows an
example of the Main output home screen. The sample rate, volume level and input source indicated
will depend on the settings when the unit was last shut down.
Figure 12. Setting the power inlet switch to the On position.
Figure 14. Main output home screen example.
Figure 13. Front panel power button.
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MERGING+NADAC Front Panel Display Interface
MERGING+NADAC Menu Tree
Figure 15. MERGING+NADAC menu tree.
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