DEVA Broadcast DB90-RX User manual

MAINTENANCE AND OPERATION
INSTRUCTION MANUAL
Publish Date: 21-Jul-2023
DB90-RX
IP Audio Decoder

Contents
Introduction........................................................................................................................................ 5
Typographic conventions .................................................................................................................. 6
General Information.......................................................................................................................... 7
Application ...................................................................................................................................... 7
Product Features ............................................................................................................................. 8
Technical Specications .................................................................................................................. 9
Block Diagram .............................................................................................................................. 10
Safety Warning................................................................................................................................. 11
Unpacking and inspection ............................................................................................................... 12
Mounting........................................................................................................................................... 12
Rack Requirements 1U .................................................................................................................. 12
Rack Requirements Compact Units............................................................................................... 12
Stand-Alone Devices ..................................................................................................................... 12
Getting Started ................................................................................................................................ 13
Connection .................................................................................................................................... 13
Network Settings............................................................................................................................ 14
Network Discovery ........................................................................................................................ 14
Network Security Recommendations ............................................................................................ 15
Panel Indicators and Appointments............................................................................................... 16
Front View ..................................................................................................................................... 16
Rear View ...................................................................................................................................... 17
Connecting of DB90-RX ................................................................................................................. 18
Analog Audio Outputs .................................................................................................................. 18
Digital Audio Output .................................................................................................................... 18
LAN Port ....................................................................................................................................... 18
Operation.......................................................................................................................................... 19
Status ............................................................................................................................................. 21
DB90-RX Conguration ............................................................................................................... 23
General Network Settings......................................................................................................... 23
IP Voice Annoucement .............................................................................................................. 23
Web Server Settings .................................................................................................................. 24
SNMP Settings .......................................................................................................................... 24
Other Settings .......................................................................................................................... 24
RTP Audio Player..................................................................................................................... 25
Icecast Audio Player................................................................................................................. 26
IP Audio Client ......................................................................................................................... 26
Analog Audio Output Settings .................................................................................................. 26
Audio Source Switching............................................................................................................ 26
Audio Loss ................................................................................................................................ 27
Audio Recover .......................................................................................................................... 27
Factory Defaults Settings ............................................................................................................. 28
Stream Default Settings ............................................................................................................ 29
Output Levels............................................................................................................................ 29
Network Default Settings.......................................................................................................... 29
WEB Server Default Settings ................................................................................................... 29
SNMP Default Settings ............................................................................................................. 29
Other Default Settings ............................................................................................................. 29

Hardware Reset ............................................................................................................................. 30
Network Default Settings.......................................................................................................... 30
WEB Server Default Settings.................................................................................................... 30
Rebooting ..................................................................................................................................... 31
Firmware Update ......................................................................................................................... 32
UPnP discovery in Local Networks ................................................................................................ 33
UPnP Activation ............................................................................................................................... 34
WARRANTY TERMS AND CONDITIONS................................................................................. 35
Product Registration Card.............................................................................................................. 36

THIS PAGE
IS INTENTIONALLY
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- 5 -
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 Broadcast 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-eective and innovative broadcast products.
Creativity and innovation are deeply woven into DEVA Broadcast 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 Broadcast 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 Broadcast enhances the reputation of our partners and clients alike.
Furthermore, we have already a proven merit as a credible partner provider.
Our portfolio oers 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 Broadcast products are their clear-cut, streamlined design, easiness of use and
cost-eectiveness: 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 Broadcast 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 Broadcast 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 Broadcast products are developed and produced in accordance with the latest ISO
9001 quality control standards.

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Typographic conventions
The following table describes important conventions used in the manual.
Convention and Style Description Examples
Menu > Sub Menu >
Menu Command
A menu item(s) and menu
command that you need to click
in sequence
Click Settings > General
[Button] Interface Interactive buttons Press [OK] to save the changes
NOTE Important notes and
recommendations
NOTE: The notication will appear
only once
“Reference Name” on
Page XXX
References and links refer to “New Connection”
(see “Monitoring” on page 56)
Example Used when example text is cited Example for E-mail Notication:
Date: 04 Nov 2013, 07:31:11

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General Information
Designed for high-quality audio decoding, DB90-RX supports HE-AAC versions 1 and 2,
MPEG-1 Layer 3 compressed audio streams and PCM uncompressed audio stream. The powerful
DSP processor and either the digital or the analog outputs allow the decoding process to be
accomplished in real time.
This high-tech device comes in a small and compact form, providing quick and eortless
integrating of the existing audio systems to the Internet Situated on thousands of locations all over
the world, DB90-RX allows management by any kind of web browser from your PC, PDA or any
kind of mobile device. That is what makes it the best choice for professional and consumer use.
Along with its main IP audio source DB90-RX comes with backup audio sources for higher
stability. If the audio signal of the main source disappear, the device will switch to the rst available
backup source. While when the main audio signal is recovered, DB90-RX will automatically
switch back to it. Depending on your needs, the sequence of the backup audio sources can be
easily changed.
DB90-RX in combination with the HTML 5 based WEB Interface can be used for Broadcast,
Internet Radio, Studio to Transmitter Link as well as VoIP applications. It is compatible with every
online radio system, including Icecast and Shoutcast, and also supports low latency Real Time
Protocol (RTP) connection.
In line with the latest technology, one or more DB90-RX devices in combination with an
encoder, (such as DB90-TX and DB9000-TX, for an instance) is a complete solution for long
distance audio-transmission applications.
APPLICATION
• Audio Transmission over IP-based networks.
• Point-to-Point Audio Transfer.
• MultiPoint Audio Transmission over IP-based networks.
• Low delay Real time Audio Transmission.
• Suitable for professional and consumer use.

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PRODUCT FEATURES
• High Quality HE-AAC (v.1 and v.2), MPEG-1 and MPEG-3 Decoding
• 32 kHz, 44.1 and 48 kHz sample rates support
• Support of all standard bitrates and VBR as well
• 6 LEDs and Phones output for quick diagnostics
• IP address pronunciation at startup (through the headphones)
• DHCP Client automatically assigning Network Settings
• Easy setup via a standard web browser
• UPnP for easy discovery in Local Networks
• Shoutcast / Icecast compatible TCP/IP stream
• Auto switching to another server in the event of a connection loss
• Analog Audio Output (2 x RCA connectors)
• Digital Audio Output (RCA Connector)

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TECHNICAL SPECIFICATIONS
Audio decoder
Decoder HE-AAC (v.1 and v.2), MPEG-1 Layer 3 or raw PCM
Sample rates 32, 44.1 and 48 kHz
Bit Rates All standard bitrates, including VBR
Analog audio output
Connector 2 x RCA, stereo
Type Unbalanced
Level +9dBu @ 0dBFs
Sample rate Same as the source stream
Dynamic range 101 dB
Digital audio output
Connector RCA
Type S/PDIF (IEC 60958)
Sample rate 48 kHz
Resampling Thru build-in sample rate converter
Stream client
Type Shoutcast/Icecast compatible TCP/IP client
Codec Support AAC, MP3, PCM
Servers Up to 3 with auto-switch on failure
RTP Receiver
Type Unicast RTP/UDP compatible receiver
Codec AAC, MP3
Count 1
Phones audio output
Connector 1/8” (3.5mm) jack, stereo
Type Headphones
User interface
Indicators 6 LEDs on front panel
Web interface Full control and status information
Network
Connector RJ-45
Type Ethernet
Device discovery UPnP support
Operating conditions
Temperature 10ºC - 45ºC
Humidity < 75%, non-condensing
Power requirements
Connector Power Jack 1/4” (6,3 mm)
Power supply 12V DC, 1A
Size and weight
Dimension (W x H x D) 4,17” x 1,3” x 5” (106 x 33 x 128 mm)
Weight 0,44 lbs (0,2 kg)

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BLOCK DIAGRAM
A simplied block diagram of DB90-RX IP Audio Decoder is shown below
D/A
ANALO
G
AUDIO
L
R
WEB SERVER
STREAM CLIENT
MP3 DECODER
HE-AAC v2 DECODER
POWER
LAN
DIGITAL
AUDIO
S/PDIF
TX
PHONES
DSP
Because of the all-digital, minimalist-discrete-component nature of device circuitry, we have not
provided schematic diagrams of the DB90-RX in this Manual. As they say on the back of TV sets:
NO USER-SERVICEABLE COMPONENTS INSIDE.
REFER ALL SERVICING TO
QUALIFIED TECHNICAL PERSONNEL.

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Safety Warning
ALWAYS OBSERVE THE SAFETY PRECAUTIONS.
Careful observance of the safety precautions will help prevent physical injury, damage of the
equipment, and extend the equipment life.
• The servicing of electronic equipment should be performed only by qualied personnel;
• Before removing the covers the unit must be switched o 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.
• Do not remove the factory sticker from the equipment. It contains information as regards
the name, serial number and MAC address of the device.
• To join the equipment to the mains supply, use the power cord purchased with the equipment.

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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!
The packing material (plastic bags, polystyrene, nails, etc.) must never be left within reach
of children, as these items are potential sources of danger.
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.
Mounting
RACK REQUIREMENTS 1U
The unit mounts in a standard 19-inch equipment rack and requires only 1¾ inches (1U) of
vertical rack space. In order the painted nish around the mounting holes to be protected, the use
of plastic washers is recommended.
RACK REQUIREMENTS COMPACT UNITS
Our customized 1U 19-inch rack accessory provides a professional mounting option for up to
three compact size DEVA units. It is made of milled aluminum and nished in black powder coat.
Two extra blanking panels and set of mounting screws are provided with each rack bracket kit.
STAND-ALONE DEVICES
DEVA’s stand-alone units (Radio Explorer series, BandScanner series, DVB Explorer) do not
require additional tools or installation brackets.

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Getting Started
In order for the normal operation of the DB90-RX to be guaranteed, you will need fulll the
following conditions:
1. Standard Ethernet 10/100M connection;
2. Correctly assigned Network conguration and device settings.
To make sure that all the conditions are fullled please, follow the instructions below.
CONNECTION
1. Install the unit on its operation place;
2. Using the provided power cable, connect the unit to the power supply network;
3. Connect the antenna cable to the RF antenna input connector located on the rear panel of
the device;
4. Connect the DB90-RX to the TCP/IP network using direct network cable;
5. IF GSM OPTION IS SUPPORTED - Using the connection cable provided, connect the
optional GSM modem. In order for better GSM network coverage to be achieved, please
select proper place for the GSM antenna.
NOTE: The GSM antenna must be installed far enough from the monitoring devices. The
GSM modem radiates RF signal that may cause spurious emissions that will may interfere with the
accuracy of the measurements.

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NETWORK SETTINGS
After connecting the network cable the Led ‘LAN’ located on the rear panel must be ON or
ashing. The next and most important step for conguration is the adjustment procedure of the
Network Communication. The settings shown below are Default Network Settings:
DHCP Enabled
IP Assigned by DHCP
Mask Assigned by DHCP
Gateway Assigned by DHCP
DNS Assigned by DHCP
HTTP Port 80
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 DB90-RX 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.
NOTE: If the port is dierent than the default one (80), it is necessary to specify it, for example:
http://192.168.1.2:9000
ATTENTION: Depending on Internet Protocol Settings, the assigned IP address may not be
visible outside your local network, thus the device may be accessed only within that network.
Consult with your network administrator for the appropriate IP settings.

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NETWORK SECURITY RECOMMENDATIONS
1. It is not recommended the DB90-RX to be directly connected to the Internet. This may
lead to unregulated access and/or problematic operation of the device. To ensure secure
connection, we recommend the device to be installed behind a router with an active rewall.
2. If remote access to the device is needed, we recommend using VPN to the router or the port
of the relevant service (WEB, SNMP, Application, etc.) to be properly NAT forwarded.
3. If NAT forward is used, it is highly recommended random ports of your choice to be used.
Not the standard ones (80 for WEB, 161 for SNMP, etc.).
4. Using DMZ connection is not recommended.
5. Make sure to change the standard access credentials (usernames and passwords, SNMP
communities).
For detailed information as regards the recommendations listed above or need of further
instructions, please contact your network administrator.

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Panel Indicators and Appointments
FRONT VIEW
PHONES LANPWR BUSY
LR
1
2345
6
78
1 - Phones Output. The following audio signals are reproduced through the headphones:
Voice Announcement of DB90-RX IP Audio Decoder IP address upon startup;
Audio signal identical to that of the outputs audio;
2 - Left Channel Level LED Indicator. This LED can be in one of the following states:
O - the channel level is within norms;
Blinking – indication of low signal level;
Constantly lit – indication of high signal level;
3 - Right Channel Level LED Indicator. This LED can in one of the following states:
O - the channel level is within norms;
Blinking – indication of low signal level;
Constantly lit – indication of high signal level;
4 - Status LED Indicator. Blinking frequency of this LED is indication of DB90-RX state:
Fast blinking – in process of connection;
Approximately once per second – data buering;
Approximately once per 2 seconds – DB90-RX is connected and operating normally;
5 - Power LED Indicator.
6 - LAN Port / Internet Input – standard RJ-45 port;
7 - Network Activity LED Indicator (RJ-45 built-in);
8 - Network Availability LED indicator (RJ-45 built-in);

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REAR VIEW
TCP/IP M
INI
A
UDIO
T
OOL
LEFT RIGHT S/PDIF
POWER
12V /2A
12345
1 - Left Line Analog Output – standard RCA female jack;
2 - Right Line Analog Output – standard RCA female jack;
3 - Factory Defaults Reset button;
4 - S/PDIF Output – standard RCA female jack;
5 - Power Supply (12V, 1A);

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Connecting of DB90-RX
ANALOG AUDIO OUTPUTS
Using a cable ending with two standard RCA jacks connect DB90-RX analog signal outputs to
the analog audio inputs of your equipment.
DIGITAL AUDIO OUTPUT
Using a cable ending with a standard RCA jacks connect DB90-RX S/PDIF output to the digital
audio input of your equipment.
LAN PORT
To ensure normal operation of the DB90-RX, its is necessary the device to it is necessary the
device to be connected to a local network or Internet by cable with RJ-45 connector.

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Operation
DB90-RX is controlled through the built-in web server and a standard web browser can be used
to monitor its status or make some adjustments. To connect to the device you need to know its IP
address and follow the next steps:
• Open a WEB Browser.
• Enter the device IP address in the browser’s address eld.
• Press <ENTER>.
If you do not know the device’s IP address, you can hear it through the headphones when you
turn on the device. The other option to nd out the IP address is using UPnP discovery in local
networks (see “UPnP discovery in Local Networks” on page 33).
The web interface consists of the following pages:
• Status
• Conguration
- Network
- IP Audio
- Backup Audio
• Factory Defaults
• Reboot
• Firmware Update
The Navigational menu and its options are available at the top part of the WEB Interface. The
settings window below is divided into two sections - settings (on the left) and help section with
brief explanation of the settings. Pointing the mouse cursor on any of the elds in the left part of
the screen will open a new window with additional and useful information.

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Upon entering the WEB Interface, this is how the main page will look like:
Username and Password may be requested if the Access Control is enabled and a page other
than STATUS is selected (see “Web Server Settings” on page 24). Defaults values are user and
pass.