DEVA Broadcast DB91-TX User manual

MAINTENANCE AND OPERATION
INSTRUCTION MANUAL
Publish Date: 03-Jan-2018
DB91-TX
Compact IP Audio Encoder

Contents
Introduction........................................................................................................................................ 4
Typographic conventions .................................................................................................................. 5
General Information.......................................................................................................................... 6
Product Features ................................................................................................................................ 7
Technical Specications..................................................................................................................... 8
Panel Indicators and Appointments............................................................................................... 10
Front Panel.................................................................................................................................... 10
Rear Panel..................................................................................................................................... 11
Block diagram .................................................................................................................................. 12
Before you start ................................................................................................................................ 13
Safety Warning .............................................................................................................................. 13
Operating recommendations ......................................................................................................... 13
Unpacking and inspection............................................................................................................. 13
Mounting........................................................................................................................................... 14
Heat Dissipation............................................................................................................................ 14
Radio Frequency Interference....................................................................................................... 14
Basic Setup........................................................................................................................................ 15
Analog Audio Inputs...................................................................................................................... 15
Digital Audio Inputs ...................................................................................................................... 15
LAN port........................................................................................................................................ 15
WEB Interface.................................................................................................................................. 16
Network Discovery ........................................................................................................................ 16
Access............................................................................................................................................ 16
WEB Interface Menu pages ............................................................................................................ 17
Status ............................................................................................................................................. 17
Settings .......................................................................................................................................... 18
Input .............................................................................................................................................. 19
Encoding ....................................................................................................................................... 21
Encoder Type MP3............................................................................................................... 21
Encoder Type HE-AAC ........................................................................................................ 22
IP Audio ........................................................................................................................................ 23
IP Audio Server.................................................................................................................... 23
IP Audio Sender 1/2/3.......................................................................................................... 24
General.......................................................................................................................................... 25
Network ......................................................................................................................................... 26
Network ............................................................................................................................... 26
E-mail ................................................................................................................................. 27
HTTP Server ....................................................................................................................... 27
FTP Server .......................................................................................................................... 27
SNMP Agent ........................................................................................................................ 27
Other ............................................................................................................................................. 28
Firmware Update................................................................................................................. 28
Storage................................................................................................................................. 28
Factory Defaults .................................................................................................................. 28
Reboot Device...................................................................................................................... 28
System Log .......................................................................................................................... 29
Hardware Reset ............................................................................................................................. 30
Network Default Settings ......................................................................................................... 30
WEB Server Default Settings ................................................................................................... 30
WARRANTY TERMS AND CONDITIONS................................................................................. 31
Product Registration Card.............................................................................................................. 32
APPENDIX B ................................................................................................................................... 33
How should I congure the connection between my DEVA Device and an FTP Client? 33

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IS INTENTIONALLY
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- 4 -
Introduction
DEVA Broadcast Ltd. is an international communications and high-technology manufacturing
organization, its corporate headquarters and facility located in Burgas, Bulgaria. The company
serves the broadcast and corporate markets worldwide – from consumers and small businesses to
the largest global organizations. It is dedicated to the research, design, development and provision
of advanced products, systems and services. DEVA launched its own brand back in 1997 and has
nowadays evolved to become known as a market leader and internationally reputed manufacturer
of user-friendly, cost-effective and innovative broadcast products.
Creativity and innovation are deeply woven into DEVA corporate culture. Through successful
engineering, marketing and management our team of dedicated professionals creates future-
oriented solutions to improve customers’ performance. You may rely that all issues communicated
to our crew would be addressed accordingly. We pride ourselves on our pre and post-sales support
and purchase services, which along with the outstanding quality of our radio gear have won us due
respect and the market authority position.
DEVA best-of-breed solutions have become the best sellers for our partners. The strategic
partnerships which have been formed with industry leaders during all these years that we have been
operating on the broadcasting market, have proved us a reliable business partner and a valuable
asset, as our dealers worldwide would conrm. In constant pursuit of precision and long-term
satisfaction, DEVA enhances the reputation of our partners and clients alike. Furthermore, we have
already a proven merit as a credible partner provider.
Our portfolio offers complete line of high quality and competitive products for FM and Digital
Radio, Radio Networks, Telecommunication Operators and regulation authorities. For almost
two decades of intensive software and hardware development, we have achieved a unique price-
performance and endurance of our product lines. Our company’s multitude of equipment and
services is in line with the latest technologies and key trends. The most recognizable characteristics
attributed to DEVA products are their clear-cut, streamlined design, easiness of use and cost-
effectiveness: simplicity of forms but multiplicity of functions.
For us there is no stage when we deem that we have reached the most satisfactory level in our
work. Our engineers are in constant pursuit of new ideas and technologies to be captured in DEVA
solutions. Simultaneously, a strict control is being exercised at each step of any new development.
Experience and hard work are our fundament but the continuous improving process is what we
never leave aside. DEVA participates on a regular basis in all landmark broadcasting events, not
only to promote its products, but to exchange valuable know-how and experience. We are also
engaged in international large-scale projects involving radio and audio solutions which makes us
even more competitive on the global market.
All DEVA products are developed and produced in accordance with the latest ISO 9001 quality
control standards.

65 Aleksandar Stamboliyski Str., 8000 Bourgas, Bulgaria
Tel: [phone], Fax: [phone]
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- 5 -
Typographic conventions
This manual uses the following typographic conventions:
Style Used for
NOTE Important notes and recommendations
Example Used when example text is cited
“Menu” on page XX. References
[OK] Interface Interactive buttons.
Settings Menu paths are represented as follows: Settings> General> Backup

65 Aleksandar Stamboliyski Str., 8000 Bourgas, Bulgaria
Tel: [phone], Fax: [phone]
E-mail: of[email protected] ,Web: www.devabroadcast.com
- 6 -
General Information
DEVA’s in-depth expertise in IP Audio technologies meets cutting-edge trends in DB91-TX,
designed to guarantee you outstanding performance. This second generation IP Audio encoder
converts the audio signal into high quality compressed audio stream, and transmits the output signal
directly over IP-based networks. To ensure audio transmission without quality loss, DB91-TX also
supports uncompressed PCM audio stream.
Small and compact, this high-tech device enables quick incorporation in the existing audio
systems and their respective effortless integration to the Internet. The front panel’s audio level bar
graphs and LED indicators allow for reading at a glance the current state of the device. In line with
DEVA’s very essential brand characteristics - easy set-up and monitoring, the DB91-TX could be
managed through a simple and intuitive HTML5 interface and any kind of web browser, be it your
PC, smart phone or tablet, remotely or locally.
To unit ensures premium broadcasting experience as once the audio source is selected, the
encoded in real time audio is immediately transmitted over IP-based networks. The enhanced
DB91-TX can act simultaneously as an Icecast/SHOUTcast compatible Server, Icecast source
client or Real Time Protocol (RTP) sender. The audio stream can be spread over an IP-based
network to one or more DB90-RX, DB91-RX or other compatible IP audio decoders. To address
the evolving customer needs, the DB91-TX IP Audio Encoder can also send audio to a number of
clients simultaneously, provided that a multicast address is being entered as a client address.
Decades of experience to our credit, expanded tech expertise and understanding of customer’s
needs have resulted in agiler, trusted and cost-efcient solutions that improve broadcasters’
performance. DB91-TX, with its compact form, wide array of enviable features and intuitive
control interface is the valuable asset to any enterprise in need of preeminent broadcasting systems
and services.

65 Aleksandar Stamboliyski Str., 8000 Bourgas, Bulgaria
Tel: [phone], Fax: [phone]
E-mail: of[email protected] ,Web: www.devabroadcast.com
- 7 -
Product Features
• High Quality HE-AAC (v.1 & 2) and MPEG-1 Layer-3 Compression
• 32 kHz, 44.1 and 48 kHz sample rates support
• Up to 88 kbps bitrate for HE-AAC
• Up to 320 kbps bitrate for MPEG-1 Layer-3
• Up to 1536 kbps for PCM
• Analog Audio Input (2 x RCA connectors)
• Digital Audio Input (RCA Connector)
• SHOUTcast / Icecast compatible TCP/IP stream server
• Up to 10 simultaneously connected clients
• SHOUTcast v1 Source
• Icecast Source Client
• Multicast RTP Sender
• 2 x 5 LED front panel audio level bar graphs
• 4 x Status LEDs
• Phones output for quick diagnostics
• IP address pronunciation at startup (through the headphones)
• Full Control and easy setup via a standard web browser
• UPnP for easy discovery in Local Networks

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- 8 -
Technical Specications
AUDIO ENCODER
Count 2 user selectable plus 1 xed (PCM)
Codec HE-AAC (v.1 and v.2), MPEG-1 Layer 3 or raw PCM
Sample rates 32 kHz, 44.1 kHz and 48 kHz
Channels 1 or 2
Bit Rates Up to 88 kbps (HE-AAC);
Up to 320 kbps (MPEG-1);
Up to 3072 kbps (PCM);
MPEG-1 LAYER 3 SPECIFIC
Encoding mode Mono and Stereo, Joint Stereo or Dual Channel
Emphasis 50µs, CCITT J.17 or none
IP AUDIO SERVER
Type SHOUTcast/Icecast compatible TCP/IP stream server
Codec Any of the available
Count Up to 10 simultaneously connected clients
ICECAST SOURCE CLIENT
Type Icecast Source Client
Codec Any of the available
Count Up to 3 independent streams
SHOUTCAST SOURCE
Type SHOUTcast v1Source
Codec Any of the available
Count Up to 3 independent streams
RTP SENDER
Type Unicast/Multicast RTP Sender
Codec Any of the available
Count Up to 3 independent streams
ANALOG AUDIO INPUT
Connector 2 x RCA, stereo
Type Unbalanced
Level +6 dBu (max. +8dBu), user selectable
Sample rate 32 kHz, 44.1 kHz and 48 kHz
Dynamic range 102 dB
DIGITAL AUDIO INPUT
Connector RCA
Type S/PDIF (IEC 60958)
Resampling Thru build-in sample rate converter

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FRONT PANEL
Level indicators 2 x 5 LED bar graphs
Status Indicators 4 LEDs
Headphones 1/8” (3.5mm) phones jack
SD Card microSD card slot
USER INTERFACE
Indicators 14 LEDs on front panel
Web interface Full control and status information
NETWORK
Connector RJ-45
Type Ethernet
Device discovery UPnP support
OPERATING CONDITIONS
Temperature 10°C - 45°C
Humidity < 75%, non-condensing
POWER REQUIREMENTS
Connector Power Jack 5.5mm
Power supply 12V DC, 1A
SIZE AND WEIGHT
Dimensions (W;H;D) 106 x 33 x 128 mm
Shipping Weight 230 x 54 x 172 mm / 0.7kg

65 Aleksandar Stamboliyski Str., 8000 Bourgas, Bulgaria
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Panel Indicators and Appointments
FRONT PANEL
1. SD Card
2. L & R LED Meters – The full-time LED meters allow quick and easy monitoring of the Left
and Right Audio channels.
3. MEM LED – microSD card status indicator.
4. LAN LED – Network status indicator
5. LINK LED – Connection status Indicator. This LED can be in one of the following states:
- Off – NO active IP connection;
- Blinking – at least one IP connection is active;
6. PWR LED Meter – Power LED Indicator
7. Phones Output – The following audio signals are reproduced through the headphones:
- Voice Announcement of DB91-TX IP Audio Encoder’s IP address upon startup;
- Audio signal from the currently active audio source.

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REAR PANEL
1. Power Supply (12 V, 1A);
2. Left Line Analog Output – standard RCA female jack;
3. Right Line Analog Output – standard RCA female jack;
4. Factory Defaults Reset button;
5. S/PDIF Output – standard RCA female jack;
6. LAN Port – standard RJ-45 port.

65 Aleksandar Stamboliyski Str., 8000 Bourgas, Bulgaria
Tel: [phone], Fax: [phone]
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Block diagram
A simplied block diagram of DB91-TX IP Audio Encoder is shown below:
NO USER-SERVICEABLE COMPONENTS INSIDE.
REFER ALL SERVICING TO QUALIFIED TECHNICAL PERSONNEL

65 Aleksandar Stamboliyski Str., 8000 Bourgas, Bulgaria
Tel: [phone], Fax: [phone]
E-mail: of[email protected] ,Web: www.devabroadcast.com
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Before you start
SAFETY WARNING
• The servicing of electronic equipment should be performed only by qualied personnel;
• Before removing the covers DB91-TX must be switched off and the mains cable unplugged;
• When the equipment is open, the power supply capacitors should be discharged using a
suitable resistor;
• Never touch the wires or the electrical circuits;
• Use insulated tools only;
• Never touch the metal semiconductor. They might carry high voltages;
• For removing and installing electronic components, follow the recommendations for
handling MOS components.
ATTENTION: DB91-TX has an internal Lithium battery. Do not try to re-charge this battery!
Please contact us for detailed instructions in case the battery should be changed.
OPERATING RECOMMENDATIONS
For normal operation of DB91-TX, we recommend following the instructions listed below.
• Install the unit in places with good air conditioning. DB91-TX is designed to operate within
the ambient temperature range of 10 to 50°C. The equipment rack should be ventilated
in order for the device to keep its internal temperature below the maximum ambient
temperatures;
• We do not recommend installation in rooms with high humidity, dusty places or other
aggressive conditions;
• Locate the device away from abnormally high RF elds;
• Use only checked power supply cables. We strongly recommend the usage of shielded
cables;
• Connect DB91-TX only to reliable power supply sources. In case of unstable power supply,
please use Uninterruptible Power Supply (UPS);
• Use the device only with its top cover on to avoid electromagnetic anomalies. Otherwise,
this may cause problems with the normal functionality of the unit;
• For the normal remote operation of the unit, connect DB91-TX to a good quality Internet
connection;
• For the normal operation of DB91-TX, check if the network settings past through all the
required data trafc.
UNPACKING AND INSPECTION
Upon receipt, the equipment should be inspected for possible shipping damages. If such are
found or suspected, notify the carrier at once and contact DEVA Broadcast Ltd. The original
shipping carton box and packing materials should be kept for possible reuse, in case of return for
Warranty repair, for example. Shipping damages as a result of improper packing for return may
invalidate the Warranty!
IT IS VERY IMPORTANT that the “Product Registration Card” included in the Manual be
completed accurately and returned. This will assure coverage of the terms of the Warranty and it will
provide a means of trace in case of lost or stolen equipment. In addition, the user will automatically
receive SERVICE OR MODIFICATION INSTRUCTIONS from DEVA Broadcast Ltd.

65 Aleksandar Stamboliyski Str., 8000 Bourgas, Bulgaria
Tel: [phone], Fax: [phone]
E-mail: of[email protected] ,Web: www.devabroadcast.com
- 14 -
Mounting
HEAT DISSIPATION
Having very low electricity consumption, the DB91-TX, itself generates negligible heat. The
unit is intended for operation within an ambient temperature range, extending from freezing to
120°F/50°C. But because adjacent, less efcient equipment may radiate substantial heat, be sure
that the equipment rack is adequately ventilated to keep its internal temperature below the specied
maximum ambient.
RADIO FREQUENCY INTERFERENCE
Although we have made provision for DB91-TX, installation in the immediate proximity of
broadcast transmitters, please do practice some care using the unit near abnormally high RF elds.

65 Aleksandar Stamboliyski Str., 8000 Bourgas, Bulgaria
Tel: [phone], Fax: [phone]
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Basic Setup
ANALOG AUDIO INPUTS
Using a cable ending with two standard RCA jacks connect DB91-TX analog signal outputs to
the analog audio inputs of your equipment.
WARNING: Do not exceed maximum input level. This may permanently damage the device.
DIGITAL AUDIO INPUTS
Using a cable ending with a standard RCA jacks connect the S/PDIF signal source to the digital
audio input of DB91-TX.
NOTE: As only one input can be managed by the encoder at certain point of time, please select
the preferred signal source input – either analog or digital one. Selecting the preferred input can be
performed under CONFIGURATION menu (see “Input” on page 19).
LAN PORT
For normal operation it is necessary the device to be connected to a local network or Internet
by cable with RJ-45 connector.

65 Aleksandar Stamboliyski Str., 8000 Bourgas, Bulgaria
Tel: [phone], Fax: [phone]
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WEB Interface
DB91-TX is controlled trough a build in WEB Server and a standard web browser can be used
to monitor its status or to make some adjustments. To operate the device you need to know its IP
Address. In case you are not aware of it, you can hear it through the headphones when you turn on
the device. Alternatively, use the Network discovery feature at Local networks. Then open a new
WEB Browser and enter the device IP address in the address eld then press [Enter].
NETWORK DISCOVERY
This is a network setting that denes whether your computer can see (nd) other computers and
devices on the network and whether other computers on the network can see your computer. By
default, Windows Firewall blocks network discovery but you can enable it.
1. Open Advanced sharing settings by clicking the Start button, and then on “Control Panel”.
In the search box, type “network”, click “Network and Sharing Center”, and then, in the left
pane click “Change advanced sharing settings”;
2. Select your current network prole;
3. Click Turn on network discovery, and then click save changes.
NOTE: If you’re prompted for an administrator password or conrmation, type the password,
provide conrmation or contact your system administrator.
If you have already enabled this function on your computer DB91-TX will be automatically
added to the Device list section. The device will be ready for usage and no additional adjustments
will be required except user name and password.
ACCESS
DB91-TX provides you with a protected access to the device settings. To make the necessary
adjustments to the device, please log in as an ADMINISTRATOR. The default values being
username: admin, password: pass.

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WEB Interface Menu pages
STATUS
Upon opening the WEB interface, the main Status window will appear. The page contains
information on the device’s current status - the LED bar-graph representation of the left and right
Digital and Analog audio levels in dBFS, as well as the Active connections - Type, Status, Remote
Peer and Codec.
At the top of the control window is placed a constant section, containing information about the
input in use, Date/Time and session timeout.
At the bottom of the control window is an information bar, gathering all the important connection
parameters – rmware version in use, serial number, IP Address, and etc.
Upon change of the Web Interface screens, the main status window will resize automatically
and become a constant part of each tab. Thus, allowing reading at a glance of all the mandatory
parameters.

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SETTINGS
DB91-TX provides you with a protected access to the device settings. To make the necessary
adjustments to the device, please log in as an ADMINISTRATOR. The default values being
username: admin, password: pass.

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- 19 -
INPUT
Input – select analog or digital input to be used as Main or Backup audio source. It is not
mandatory Backup input to be specied. An option Not used is also available from the drop down
menu.
Headphones - the interactive slider allows you to control the volume of the headphones from
-30dB to 0dB.
Audio Loss and Recovery – The conditions when backup source has to be used should also be
specied (loss and recovery threshold and timeout).
NOTE: In order the applied settings to be used press the [Save] button, placed on the bottom
right part of the screen.

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If the Backup audio source is activated, the following message will appear on the main screen.