DSP-based FM Radio Monitoring Receiver with TCP/IP Connectivity

The Ultimate Award Winner

The DB4004 is second generation digital FM Radio Modulation Analyzer, built on DEVA’s long-standing expertise in the broadcasting equipment industry. This powerful monitoring system allows easy and reliable monitoring of the quality of up to 50 FM radio stations. With its TCP/IP and GSM (optional) connectivity, the DB4004 utilizes options and controls never seen before.

All measurements are refreshed simultaneously and synchronously due to the DB4004’s great processing power, thereby allowing detailed readings of all the multiplex FM signal components. The signal digitizing takes place at the input, processing the signal through DSP algorithms. Thus equipment measurement reproducibility over time is guaranteed. The powerful accuracy of the digital filters ensures that the FM multiplex signal components will be accurately and repeatedly transferred from one device to any another. In addition to the list of all the DB4004 features, the channel measurements and logs are saved in internal device memory, accessible via the built-in FTP system.

The Ultimate Award Winner
  • FM Band 65 ÷ 108 MHz Basic Spectrum Analyzer
  • Dual antenna ports with built-in RF attenuator
  • Up to 100 dBµV direct RF Antenna Input
  • Selectable wide range IF filter bandwidth
  • Fully DSP-based core
  • Bright, accurate bar graph LED metering of the Modulation and Pilot Levels
  • Total and independent Positive and Negative deviation bar graph
  • Left, Right, L+R, L-R bar graph LED audio level meters
  • Wide angle, easy to read OLED display
  • Very Intuitive Navigational Menu
  • Built-in Oscilloscope for IF, MPX, Pilot, RDS, Left & Right display
  • Levels measurement with data history
  • Spectrum analyzer allowing checking of the RF Carrier and MPX
  • Selectable De-emphasis - Off, 50µs and 75µs
  • Quick Station access via 4 Presets
  • Built-in Stereo Decoder
  • Real Time Audio Program Streaming
  • Remote Listening via optional GSM modem
  • Built-in 50 channel Data logger
  • Built-in WEB and FTP server
  • Easy to use WEB interface
  • Apple and Android devices support
  • SNTP for automatic synchronization of the built-in clock
  • RDS and RBDS decoder with BER meter
  • Alarm dispatch via E-mail, SMS, SNMP and GPO
  • Complete status reporting with SMS via optional GSM modem
  • Protected access to the device settings
  • Level Adjustable, Balanced Analog Audio Outputs on XLR Connectors
  • Professional AES/EBU, SPDIF and Optical Digital audio outputs
  • LAN port for full TCP/IP remote control and monitoring
  • Adjustable MIN/MAX alarms for RF, Pilot Left & Right Audio Levels
  • Adjustable MIN/MAX alarms for MPX, MPX Power & RDS
  • USB communication interface for local connectivity
  • Headphone output with front panel level control
  • Firmware updates will ensure improved operation
  • Accurate front-panel metering for local use
  • Restore Factory Parameters option
  • Easy Installation and Setup
  • Wide operating voltage range: 100-240V AC
  • 19" Professional Case for high RF immunity

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. The signal being digitalized in this way, at the input, the equipment acquires measurement reproducibility over time. The powerful accuracy of the digital filters used in this equipment enables the FM multiplex signal components to be accurately and repeatedly reproduced from one device to another. The incredible processing power of 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 an 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 represents the observed signal change, over time and helps you 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 some of DB4004 features likewise. 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 enables you to 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 of the important signal components and parameters to be generated and fed to the Rear Panel Alarm Terminal for remote alarm notification. The DB4004 is designed to support USB and LAN communication interfaces, allowing flexibility of the 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 signal the technicians to restore the normal service as soon as possible. This tool instantly enhances the quality control management of radio stations. The DB4004 allows you to monitor all RDS/RBDS and other signal parameters from everywhere via its communication channels TCP/IP, and allows GSM Connectivity via the optional external GSM Modem. Easy channel status monitoring or audio listening from everywhere could be done through your mobile phone. With the Audio Stream Server you can even listen to, skim through, and record the audio from another station.

All the channel measurements and logs are saved on 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 if need be. The Interactive Software-based Log Viewer tool allows very detailed control and analysis of any station from the list of the monitored channels. The Band Analyzer function of 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.

Our product DB4004 is a powerful monitoring system built on our long-standing expertise in the broadcasting equipment industry. We have created this product in adherence to the latest DSP technologies and in the passionate spirit of innovation. We pride ourselves on this product, developed to meet the needs of the most demanding professional radio broadcasting operators and regulatory authorities.

The Ultimate Award Winner
RF Input
Tuning RangeUser selectable, 87.1-108 MHz (CCIR), 65-74 MHz (OIRT), 76-95 MHz (Japan)
Tuning Step10, 20, 50, 100 kHz
Tuner Sensitivity30 dBµV
Antenna PortsDual, 2 x BNC Connectors, 50Ω
Antenna Ports Isolation> 40 dB
Internal Attenuator0, 10, 20 and 30 dB
Dynamic range100 dB
FM Demod
IF Filter Bandwindth15 Increments (27kHz - 157kHz, Auto)
Frequency Response±0.1 dB, 10 Hz to 86 kHz
MPX Power±12 dBr, 20 sec. integration
Dynamic range90 dB
Stereo Decoder
Frequency Response (L and R)±0.1 dB, 10 Hz to 15 kHz
SNR (Stereo)60 dB, 50 µs de-emphasis
THD0.15% @ 1kHz, 0.4% from 10 Hz to 15 kHz, 50 µs de-emphasis
Separation50 dB, 50 Hz to 10 kHz, 50 µs de-emphasis
Crosstalk52 dB
RDS Decoder
StandardsEuropean RDS CENELEC; United States RBDS NRSC
Error Correction & CountingYes
AF DecodingYes
CT (Time/Date)Yes
RT (Radio Text), RT+Yes
PS (Program Service name)Yes
Group AnalyzerYes
BER AnalyzerYes
Group Sequence DisplayYes
RDS RAW Data DisplayYes
FFT Spectrum Analysis (RF, Composite, Audio)
Signal SourcesRF (IF), MPX, Left, Right
FFT length2048 points
Dynamic range90 dB
Scope Analysis (RF, Composite, Audio)
Signal SourcesRF (IF), MPX, Pilot, RDS, Main, Sub, Left, Right
Record length4096 points
Dynamic range90 dB
Metering Accuracy
RF Level±1 dB, 0 to 100 dBµV
MPX Power±0.2 dBr, -12 to 12 dBr, 0.1 dBr resolution
Total, Pos, Neg±2 kHz, 10 to 100 kHz, 1 kHz resolution
Pilot, RDS±0.5 kHz, 1 to 12 kHz, 0.2 kHz resolution
Audio±1 dB, +10.0 to -55.0 dB, 0.1 dB resolution
Composite3.5 Vp-p @ 75kHz, 75Ω, unbalanced BNC Connector
Audio (L, R)+6 dBu, 600Ω, balanced XLR Connector
AES3 (L, R)5.0 Vp-p, 110Ω, balanced XLR Connector
SPDIF (L, R)3.0 Vp-p, 110Ω, unbalanced BNC Connector
Optical (L, R)Transmitter, TOSLINK
AlarmsProgrammable terminals on rear panel, optoisolated
Headphone6,3mm (1/4") Phone Jack
Communication Interfaces
USBB-type Connector
Ethernet 10/100 Base-TRJ45 Connector
GSM Modem15 pin Male D-Sub Connector
Measurement Storage
Storage16GB Build-in Memory Card
Data formatText, CSV
Voltage100-240V / 50-60 Hz
Power Consumption20VA
ConnectorIEC320, Fused and EMI-suppressed
Size and Weight
Dimensions (W;H;D)485 x 44 x 180 mm
Shipping Weight540 x 115 x 300 mm / 2.700 kg
HS Code8527212000
Frequently Asked Questions
  • How can I lock the front panel keyboard?
    To prevent unauthorized local access, the unit offers password protected keyboard locking. By default the keyboard is unprotected. To enable this function, using the front panel navigational menu, go to Settings > Security > Front Panel, then press OK and ENABLE the Access Control function. Set the preferred 4 digit password and access timeout.
    Once the keyboard lock function is enabled, every attempt to use it will require a password: ENTER PASSWORD:0***. Access will be denied upon false entry.
  • How to unlock the front panel keyboard? I have forgotten the password / I have enabled the function unintentionally.
    If the “Keyboard unlock” function has been activated by mistake, try to unlock it using the default password 01234. In order to deactivate the code protection, once the front panel menu is unlocked follow the menu path Menu > Settings > Security > Front Panel > Access control and then select Disable.
    If you do not manage to unlock the front panel with the default password, nevertheless whether it has been changed intentionally or not, the unit should be returned to its factory defaults in order for the password security to be disabled.
  • I forgot the master password for the DEVA Device Manager Software, what should I do?
    If due to any reason you have forgoten your Master Password, contact us at support@devabroadcast.com for detailed instructions on the reset procedure.
  • I have forgotten my password for the WEB Interface. What should I do?
    The WEB Interface password could be viewed/changed via the front panel navigational menu. The menu path is Menu > Settings > Security > Remote Access.
  • I have forgotten both – the front panel and WEB Interface passwords. What should I do?
    If due to any reason you have forgoten both passwords - the one for the front panel and the one for the WEB Interface, please contact us at support@devabroadcast.com
  • My Logger/PI Campaign is not running. What might be the problem?
    When the campaign settings are applied, you will have to specify not only the PI/CALL or Frequency, but also the Acquisition time / Campaign's start time delay. In order for a Campaign to be commenced, the device should be inactive for the specified time. It is very important, during the campaign the front panel navigational menu, WEB interface or SNMP not to be used; otherwise the campaign will not be properly performed.
    Prior to the set-up procedure, you will have to note that the campaigns (PI and Logger) cannot be performed simultaneously. The PI campaign is with higher priority, thus in order for a Logger mode campaign to be performed you will have to make sure that the PI Campaign is disabled.
  • How can I switch between %/KHz (RDS/RBDS Mode)?
    The mode could be changed via the front panel menu and via the WEB Interface.
    The menu path when the WEB Interface is used is : Settings > Tuner > section “ RDS/RBDS Mode”.
    The menu path when the change is made via the front panel menu is: Settings > Tuner > RDS Mode.
  • I cannot receive E-mails from the monitoring equipment. How can I configure the E-mail client?
    The unit should be configured according to the e-mail provider’s specifications. Otherwise, messages to your e-mail account will not be received. The configuration is made through the WEB Interface, Settings > Comm > E-mail section.
    Enter the desired alarm recipients in e-mail 1 and/or e-mail 2 fields. Fill in your e-mail account settings: Sender, Username and Password, Server, SMTP port and connection type. You can also change the host name if necessary or otherwise leave it as it is.
    We recommend you to use the ‘Test’ button and generate a test e-mail, which upon success will be delivered to the specified E-mail 1 and/or E-mail 2.
    Example of Test E-mail Message:
    DB4004 Test Message.
    Please do not reply to this e-mail.
    Note that the “Network” section should also be correctly configured, most importantly the “DNS” parameter if you want to use server names (ex: “smtp.yourdomain.com”).
  • I cannot receive SMS from the monitoring equipment. How can I configure the GSM modem?
    First, you will have to make sure that the GSM modem is properly connected to the device.
    Then enter the device via the WEB Interface and go to Settings > Comm > GSM Modem section. Check the baud rate, as it is mandatory for the proper operation of the GSM Modem. You will also have to make sure that the PIN security of the used SIM card is disabled.
    If the above conditions are fulfilled you could proceed with the next step. Up to four numbers for SMS alarm notifications could be set. We recommend a test SMS to be generated (via pressing the ‘Test’ button), once all needed settings are applied. Upon success, the SMS will be delivered to all specified GSM numbers.
    Example of Test SMS Message:
    DB4004 Test Message.
    The current condition of the GSM Modem could be checked in the “Status Screen”.
  • I do not hear the audio from the ‘Listen’ button of the WEB Interface.
    Please verify that your speakers/headphones are connected and the audio is not muted. Also, there is some buffering performed by the web browser before the audio starts. This process may take about 20 seconds or more for some browsers. Another important condition is that the connection bandwidth should be high enough; otherwise the audio will skip or become choppy.

DB4004 Demo Devices

Click on the buttons with the selected Demo Devices below and take a closer look at the available features.

Use the following credentials when necessary:
User: admin         Password: pass

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