DEVA Broadcast DB6400 User manual

MAINTENANCE AND OPERATION
INSTRUCTION MANUAL
Publish Date: 07-Jun-2016
DB6400
Advanced FM and Digital Radio
4-Band Audio Processor
with Backup Audio Player

Contents
Introduction........................................................................................................................................ 6
Typographic conventions .................................................................................................................. 7
General Information.......................................................................................................................... 8
Product Features ................................................................................................................................ 9
Technical Specications ................................................................................................................ 10
Front Panel ....................................................................................................................................... 12
OLED Display............................................................................................................................... 12
LED Meters ................................................................................................................................... 12
Context-sensitive Soft Buttons....................................................................................................... 12
Navigational Buttons..................................................................................................................... 12
Rear Panel..................................................................................................................................... 13
Rear Panel Alarm Terminal .......................................................................................................... 14
GPI Trigger Input Pins............................................................................................................. 14
Digital I/O Pins ........................................................................................................................ 14
Before you start ................................................................................................................................ 15
Safety warning............................................................................................................................... 15
Operating recommendations ......................................................................................................... 16
Unpacking and inspection............................................................................................................. 17
Radio Frequency Interference (RFI) ............................................................................................. 17
Mounting........................................................................................................................................... 18
Rack requirements ......................................................................................................................... 18
Heat Dissipation............................................................................................................................ 18
AC Mains Power .............................................................................................................................. 19
Fuse holder.................................................................................................................................... 19
Mains Voltage Selector.................................................................................................................. 19
Power cord .................................................................................................................................... 19
Ground Loops................................................................................................................................ 19
DB6400 Location.............................................................................................................................. 20
Source Material Quality.................................................................................................................. 20
Operation.......................................................................................................................................... 21
Processing path ............................................................................................................................. 21
Audio Processing Explained ......................................................................................................... 22
Basic Setup/Connection Example................................................................................................... 23
Referencing Analog and Digital Inputs level ................................................................................ 23
Referencing Analog and Digital Outputs level.............................................................................. 24
Setup with Analog Program Inputs ............................................................................................... 25
Setup with Digital Program Inputs ............................................................................................... 26
Analog connection with two transmitters...................................................................................... 27
Analog connection with DEVA SmartGen 6.0............................................................................... 28
Side-chain................................................................................................................................. 28
Loop through ............................................................................................................................ 29
OLED Display, Navigational & Soft Buttons ................................................................................ 30
OLED Display............................................................................................................................... 30
Header area.............................................................................................................................. 30
Main Screen working area........................................................................................................ 31

Soft Buttons............................................................................................................................... 31
Navigation Buttons ................................................................................................................... 31
Menu Pages .............................................................................................................................. 32
[Input].................................................................................................................................. 32
[Process].............................................................................................................................. 32
[Output] ............................................................................................................................... 32
[Presets]............................................................................................................................... 32
Settings.............................................................................................................................................. 38
Trigger ports.................................................................................................................................. 38
Keyboard lock................................................................................................................................ 39
Keyboard unlock ........................................................................................................................... 39
RDS ............................................................................................................................................... 40
Dayparting .................................................................................................................................... 40
Other sections ................................................................................................................................... 41
Stereo............................................................................................................................................. 41
Status ............................................................................................................................................. 41
Factory and User presets................................................................................................................. 42
Factory Presets.............................................................................................................................. 42
How to create and save a User Preset or How to customize your sound................................. 42
WEB Interface.................................................................................................................................. 44
Manual IP Address Identication.................................................................................................. 44
Network Discovery ........................................................................................................................ 45
Access............................................................................................................................................ 45
Status ............................................................................................................................................. 46
Settings .......................................................................................................................................... 47
General..................................................................................................................................... 47
Communication......................................................................................................................... 48
Network ............................................................................................................................... 48
SNMP Agent ........................................................................................................................ 48
E-mail .................................................................................................................................. 48
HTTP Server ....................................................................................................................... 49
FTP Server .......................................................................................................................... 49
Syslog .................................................................................................................................. 49
Dayparts ................................................................................................................................... 50
Other......................................................................................................................................... 51
Firmware Update ................................................................................................................ 51
Storage ................................................................................................................................ 51
System Log .......................................................................................................................... 51
Factory Defaults ................................................................................................................. 51
Reboot ................................................................................................................................. 51
Log............................................................................................................................................ 52
Presets ........................................................................................................................................... 53
How can a user preset be made?.............................................................................................. 53
Preset Lock ............................................................................................................................... 54
Presets Export........................................................................................................................... 54
Presets Import........................................................................................................................... 55
Presets Delete ........................................................................................................................... 55
Input .............................................................................................................................................. 56

AGC............................................................................................................................................... 58
Equalizer ....................................................................................................................................... 59
Enhancer ....................................................................................................................................... 60
Multiband 1 (Multiband Limiter) .................................................................................................. 61
Multiband 2 (Multiband Limiter) .................................................................................................. 63
Final Limiter ................................................................................................................................. 64
MPX............................................................................................................................................... 65
RDS Data ...................................................................................................................................... 66
Basic RDS................................................................................................................................. 66
Output............................................................................................................................................ 68
WARRANTY TERMS AND CONDITIONS................................................................................. 69
Product Registration Card.............................................................................................................. 70
APPENDIX A ................................................................................................................................... 71
RDS: Europe vs America .............................................................................................................. 71
The RDS System ........................................................................................................................... 71
APPENDIX B ................................................................................................................................... 72
How should I congure the connection between my DEVA Device and an FTP Client? 72
1. FTP Server Settings ......................................................................................................... 72
2. IP Router and Port Translation Settings.......................................................................... 72
3. Example of FTP Client (FileZilla) Settings .................................................................... 73
APPENDIX C.1................................................................................................................................ 74
PTY Code Description Used in RBDS Mode – North America..................................................... 74
APPENDIX C.2................................................................................................................................ 75
PTY Code Description Used in RDS Mode – Europe, Asia .......................................................... 75

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IS INTENTIONALLY
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- 6 -
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.

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- 7 -
Typographic conventions
This manual uses the following typographic conventions:
Style Used for
NOTE Important notes and recommendations
Example Used when example text is cited
0 dB Menu element value
“Menu” on page XX. References
[OK] Front panel navigation and soft buttons.
WEB Interface interactive buttons.
Settings Menu element and soft button name. Menu path are represented as
follows: Settings> Security> Front Panel> Access control

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- 8 -
General Information
The long years of experience at the top level of broadcasting technologies, as well as the
undisputable expertise of our engineering team have brought forth a brand new audio processing
tool - the DB6400 FM and Digital Radio 4-Band Audio Processor.
The DSP-based Stereo Encoder guarantees precision of the MPX signal with advanced peak
control and two independently-congurable composite MPX outputs. The DB6400 offers perfect
audio clarity no matter what the source material is. A complete processing architecture: Wide
band AGC with “Intelligent Gating”, 4-band Parametric EQ, Advanced Bass and Treble Controls,
4-Band High Quality Sound processor with Fidelity control and Sound Impact, 4-Band Limiter,
FM Limiter with advanced distortion & pre-emphasis control and HD Lookahead Limiter.
Another feature that distinguishes the DB6400 from other products of its category is its Fallback
function. This cutting-edge device is able to detect signal loss. In the case of silence at the main
audio input, it automatically switches over to a backup source, thus ensuring a constant audio feed.
What is more, an e-mail notication is immediately sent which allows for an instant response on
the part of your technical support team. Through the use of a standard FTP client, you have the
opportunity to update the backup content at will via any PC. An additional asset is the automatic
return to the main audio source as soon as the default input is restored. All silence sense parameters
are user-dened.
Needless to say, the DB6400 comes with a user-friendly, comprehensive and well-organized
user interface. Access is available through the front panel, remotely via TCP/IP and by using the
WEB interface through iOS, Android or any other mobile device.
This one-of-a-kind device is the peak of DEVA’s engineering achievements combining simplicity
of use, affordability of price and top performance and employing an array of technical parameters
not found in any other device of its class.

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- 9 -
Product Features
• Ultra low latency, all-digital DSP based design
• Advanced Wide Band AGC
• 4-Band Parametric EQ
• Advanced Bass & Treble Controls
• 4-Band Limiter
• FM Controlled distortion Limiter
• 4-Band Dynamic Processor with Fidelity and Sound Impact System
• HD Lookahead Limiter
• Extensive set of factory presets and several customizable user presets
• L/R Analog inputs and outputs and two independent Composite MPX outputs.
• Integrated digital stereo generator with advanced peak control
• Built-in web server for remote control access via TCP/IP connection
• Software Control (over local network or the Internet using any Windows® PC)
• Built in DSP-based RDS/RBDS encoder
• Bright, wide view angle OLED and full-time LED meters
• Easy setup and control via the front panel
• Remotely upgradable rmware to ensure improved operation
• Headphone output with front panel level control
• Externally synchronized output sample rate
• Tight peak control at all outputs
• EMI-suppressed XLR connectors
• Stereo encoder integrated with audio processing
• Bypass and Test tone Mode
• Embedded SNMP agent permitting full device management
• Easy to use WEB interface
• Apple and Android devices support
• SNTP for automatic synchronization of the built-in clock
• Notications on input/preset change via E-mail and SNMP
• Protected access to the device settings
• Professional AES/EBU, SPDIF and Optical Digital audio inputs
• Level Adjustable, Balanced Analog and Digital Audio Outputs
• LAN port for full TCP/IP remote control and monitoring
• USB communication interface for local connectivity
• Easy Installation and Setup
• Wide operating voltage range: 100-240V AC
• 19” Professional Case for high RF immunity

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- 10 -
TECHNICAL SPECIFICATIONS
ANALOG AUDIO INPUT
Connectors Main - Two XLR, EMI suppressed, electronically balanced; Auxiliary
- DB9, EMI suppressed, electronically balanced
Conguration Stereo
Input level (0 dBFS) Software selectable -8 dBu to +24 dBu peak
Impedance Jumper selectable 600Ω / >10kΩ
A/D Conversion 24 bit; 48 kHz sample rate; Differential inputs
ANALOG AUDIO OUTPUT
Connectors Two XLR, EMI suppressed, electronically balanced
Conguration Stereo. Software selectable at, pre-emphasized or de-emphasized
Output Level (0 dBFS) Software selectable -12 dBu to +24 dBu peak into >= 600Ω load
Source Impedance 20Ω
Load Impedance >= 600Ω, balanced/unbalanced
Signal-to-Noise >= 110 dB unweighted (Bypass mode, digital input, at, 20Hz-
15kHz bandwidth, referenced to +12 dBu output level)
Distortion <= 0.01 THDN (Bypass mode, digital input, at, 20Hz-15kHz
bandwidth, referenced to +12 dBu output level)
D/A Conversion 24 bit; 192 kHz sample rate; Differential outputs
DIGITAL AUDIO INPUT
Connectors Main - XLR, EMI suppressed, transformer balanced and oating;
110Ω impedance; Auxiliary - DB9, EMI suppressed, transformer
balanced and oating; 110Ω impedance
Conguration Stereo AES3 standard, up to 24 bit resolution
Sampling Rate 22 kHz to 192 kHz
Input Gain -20 dB to 20 dB, referenced to 0 dBFS, software selectable
DIGITAL AUDIO OUTPUT
Connector XLR, EMI suppressed, transformer balanced and oating; 110Ω
impedance
Conguration Stereo AES3 standard, 24 bit resolution. Software selectable at,
pre-emphasized or de-emphasized
Sample Rate Internal - 32, 44.1, 48, 88.2, 96, 176.4, 192 kHz. Externally synced
to Main AES3 digital input at 32 to 192 kHz. Software selectable.
Word Length 24 bit
Output Reference Level -20 to 0 dBFS software selectable

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- 11 -
COMPOSITE BASEBAND OUTPUT
Connectors BNC unbalanced, chasis oating, EMI suppressed
Conguration Two outputs. Independent level control. MPX+MPX, MPX+PILOT
or BYPASS mode
Source impedance 75Ω
Load impedance 50Ω or greater
Output level -18dBu to +18dBu
Pilot level 0% to 15%
D/A conversion 24 bit, differential
SNR >80 dB (Bypass mode, at, 20Hz - 15kHz bandwidth, Digital input
referenced to -10dBFS, unweighted)
THD < 0.01% (Bypass mode, at, 20Hz - 15kHz bandwidth, Digital input
referenced to -10dBFS, unweighted)
Stereo Separation >60dB
Crosstalk >70dB
Pilot protection >90dB relative to 9% pilot injection, ±250 Hz
38 kHz suppression >80dB (referenced to 100% modulation)
REMOTE ACCESS INTERFACE
Conguration TCP/IP via USB or Ethernet interface
USB Connector USB type B connector
Ethernet Connector Female RJ45 shielded connector for 10/100 Mbps CAT5 ethernet
networks
REMOTE CONTROL INTERFACE (GPI)
Connector DB-9 male
Conguration Eight LED optocoupler, current limited cathode inputs. Anodes are
connected to VCC internally.
Control Selects corresponding user preset if connected to GND
POWER
Voltage 100-240 VAC, 50-60 Hz, 30VA
Connector IEC, Fused and EMI-suppressed. Detachable 3-wire power cord
supplied
ENVIRONMENTAL
Operating Temperature 0° to 50°C / 32° to 122°F
Humidity 0–95% RH, non-condensing
SIZE AND WEIGHT
Dimensions (W;H;D) 483 x 44 x 180 mm / 19 x 1.875 x 7”
Shipping Weight 540 x 115 x 300 mm / 2.6kg

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Front Panel
OLED DISPLAY
DB6400 has easy to read, high-resolution OLED graphical display that visualizes all
measurements of the received signal and DB6400’s settings.
LED METERS
The full-time LED meters allow quick and easy monitoring of the metering, making the setup,
adjustment and programming easy.
CONTEXT-SENSITIVE SOFT BUTTONS
Used for navigation through the menus, quick access to the parameters, modes, functions and to
alter their values. The Soft Buttons indicators are placed on the bottom side of the OLED display.
Depending on the currently selected menu context the indicators change their function. The Soft
Buttons will be referred as (left-to-right) [SB1], [SB2], [SB3] and [SB4].
NAVIGATIONAL BUTTONS
[UP], [DOWN], [LEFT], [RIGHT] and [OK] buttons, as the Soft Buttons, are used to navigate
through the menus selecting various functions and parameters of DB6400.

- 13 -
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REAR PANEL
1
2
3 4
56 7 8
9
10
11 12
13 14 15
1. Mains connector, 100-240 VAC, 50-60 Hz, 30VA, IEC-320 C14 type, EMI-suppressed;
2. Fuse holder;
3. MPX Output 1 - BNC;
4. MPX Output 2 - BNC;
5. Analog Audio Left Input - XLR;
6. Analog Audio Right Input - XLR;
7. Analog Audio Left Output - XLR;
8. Analog Audio Right Output - XLR;
9. GPI
10. DIGITAL I/O
11. Digital Audio Input - XLR;
12. Digital Audio Output - XLR;
13. Ethernet T-BASE10/100 - RJ45;
14. USB – type B;
15. MICRO SD

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- 14 -
REAR PANEL ALARM TERMINAL
9876
5 4 3 2 1
1 2 3 4
56789
GPI Trigger Input Pins
Trigger Input Pin User Preset Number
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
NOTE: Pin 9 is connected to GND.
PIN 1
GND
PIN 1
GND
Digital I/O Pins
Pin Signal
1 Right Aux In - positive
2 Right Aux In - negative
3 Right Aux In - GND
7 Left Aux In - positive
8 Left Aux In - negative
6 Left Aux In - GND
4 Digital Aux In - positive
5 Digital Aux In - negative
9 Digital Aux In - GND

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- 15 -
Before you start
SAFETY WARNING
• The servicing of electronic equipment should be performed only by qualied personnel;
• Before removing the covers DB6400 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: DB6400 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.

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- 16 -
OPERATING RECOMMENDATIONS
For normal operation of DB6400, we recommend following the instructions listed below.
• Install the unit in places with good air conditioning. DB6400 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 DB6400 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 DB6400 to a good quality Internet
connection;
• For the normal operation of DB6400, check if the network settings past through all the
required data trafc.

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- 17 -
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” on page 70 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.
RADIO FREQUENCY INTERFERENCE (RFI)
Although we have made provision for DB6400 installation in the immediate proximity of
broadcast transmitters, please do practice some care using the unit near abnormally high RF elds.

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- 18 -
Mounting
RACK REQUIREMENTS
The DB6400 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.
HEAT DISSIPATION
Having very low electricity consumption, the DB6400 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.

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- 19 -
AC Mains Power
FUSE HOLDER
The fuse holder is placed inside the unit, next to the voltage selector. Apply downward pressure
and pull the cap outward to access the 5mm mains fuse. The reverse process will release the cap.
MAINS VOLTAGE SELECTOR
Before connecting the AC Power, make sure that the internal Power Switch and the fuse rating
are in accordance with the mains supply at your location.
DB6400 Power Supply Factory Settings are:
- 100 - 240 VAC
- 1 Amp Fuse
CAUTION: Permanent damage will result if improper AC supply voltage is applied to DB6400
device. Your warranty does not cover damages caused by applying improper supply voltage, or use
of an improper fuse.
POWER CORD
The detachable IEC-type power cord is supplied with the unit. The individual cord conductors
may be color-coded in either of two ways:
1) In accordance with US standards:
BLACK = AC “HOT”
WHITE = AC NEUTRAL
GREEN = EARTH GROUND
2) To European CEE standards:
BROWN = AC “HOT”
BLUE = AC NEUTRAL
GREEN/YELLOW = EARTH GROUND
GROUND LOOPS
Because the unbalanced MPX OUTPUTS of the DB6400 are chassis-ground-referenced, a
mains frequency or RF ground loop could be formed between the input or output cable shield
grounds and the AC power cord ground. A ‘ground-lifting’ AC adapter may well remedy such a
situation, although the chassis somehow must be returned to earth ground for safety. Generally,
being screwed-down in the equipment rack will satisfy the safety requirement.

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DB6400 Location
The best location for DB6400 is as near as possible to the transmitter, so that its stereo encoder
output can be linked to the transmitter through a circuit path. It is mandatory that the cable used for
connection between DB6400’s MPX output, and the MPX input of the transmitter be as short as
possible. This will prevent any face distortion. If this conguration is not possible, the DB6400’s
AES3 digital audio output can be fed through an all-digital, uncompressed path to the transmitter
exciter.
The usage of left and right analog audio outputs is recommended in the situations when the
stereo encoder and exciter are under the jurisdiction of an independent transmission authority, and
the programming agency’s jurisdiction ends at the interface between the audio facility and the link
connecting the audio facility to the transmitter. (The link might be telephone / post lines, analog
microwave radio, or various types of digital paths.)
Source Material Quality
The DB6400 is designed to achieve perfect sound quality, regardless of the source material.
Though, it is very important that the source audio to be as clean as possible, as upon processing the
poor-quality source material will cause distortion and unpleasant audio defects.