DEVA Broadcast DB4004, Инструкция по техническому обслуживанию и эксплуатации

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65 Aleksandar Stamboliyski Str., 8000 Bourgas, Bulgaria
Tel: +359 56 820027, Fax: +359 56 836700
E-mail: office@devabroadcast.com ,Web: www.devabroadcast.com
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General Information
The DB4004 is our second generation digital FM Radio Modulation Analyzer. It combines our
long term experience in FM Radio Monitoring and FM radio measurement “know how.” The RF
(IF) signal is digitalized as soon as it enters the device and all signal processing is then made through
DSP algorithms. Digitizing the signal in this way, at the input, gives the equipment measurement
reproducibility over time. The powerful accuracy of the digital filters used in this equipment
enables the FM multiplex signals components to be accurately and repeatedly reproduced from
one device to another. The incredible processing power in the device enables all measurements
to be refreshed simultaneously and synchronously, thereby allowing for detailed readings of
all the Multiplex FM signal components. The DB4004 has easy to read, high-resolution OLED
graphical display and ultra-bright bargraph LED 60 segment indicators that allow reading the main
signal parameters at a glance. The built-in DB4004 Oscilloscope representing the observed signal
change over time enables you to visualize the most important signals participating in the process
of demodulating and stereo decoding. Complimenting the Oscilloscope mode, the Spectrum
analyzer mode allows spectral analysis of the input signal and part of DB4004 features. Spectral
components of the selected signal are determined on the basis of Fast Fourier Transform. MPX
Power and all other level measurements are supported by measurement history data. In addition
to the list of DB4004 features, RDS information contained in the processed MPX signal is easily
visualized and represented as RDS/RBDS Data and detailed RDS/RBDS Statistics.
Dependable off-air monitoring lets you keep an eye on other stations in the market as well as
measuring the important parameters of your own signal. Adjustable Alarms enable alerting for
most the important signal components and parameters to be generated and are fed to the Rear
Panel Alarm Terminal for remote alarm notification. The DB4004 is designed to support USB and
LAN communication interfaces, allowing flexibility in remote connection and control of the unit.
The DB4004 is the most cost effective way for regular monitoring of the quality and continuity of
your station and up to 50 other FM Radio Stations, with many innovative features such as TCP/
IP connectivity, audio streaming, and automatic alerts for operation outside of predefined ITU-R
ranges. In case of transmission failure, maintenance staff will be immediately alerted via E-mail,
SNMP, or SMS which allows technicians to restore a normal service as soon as possible. This
tool instantly enhances the quality control management for radio stations. The DB4004 allows
you to monitor all RDS/RBDS and other signal parameters from anywhere via its communication
channels TCP/IP, and allows GSM Connectivity via the optional external GSM Modem. Easy
channel status monitoring or audio listening from anywhere uses your mobile phone. With the
Audio Stream Server you can even listen to, skim, and record the audio from another station.
All the channel measurements and logs are saved in internal device memory. The built-in FTP
system manages the files by an assigned schedule. All the collected information is centralized in a
database and can be revised, played back, and sent automatically to the qualified staff as needed.
The Interactive Software-based Log Viewer tool allows the very detailed control and analysis
of any station from the list of monitored channels. The Band Analyzer function in the DB4004
presents an overview of all FM signals available, plus the RF signal strength of these stations.
Scans are possible within any section of the band in the FM band in 3 different modes. The
generated spectrum diagram shows the RF Level vs. the Frequency. Scheduled Band Scans can
also be enabled for RF intruder or pirate transmissions detection. The Deva Broadcast’s DB4004 is
a superb monitoring system designed as a powerful tool for FM Radio signal analysis and regular
off-air monitoring of your stations.