Ingenieurbüro Mulka

The world of bit-streams is our business.

DABRF Receiver & Modulator

Professional DAB Receiver and DAB Modulator rolled into one.


DABRF - Core component for re-transmitters and tunnel break-in systems.
Key features
  • DAB test receiver and modulator rolled into one
  • RF recording with 1,6 MHz bandwidth
  • Can be combined with software components of the DAB-XPlorer family
  • COFDM modulator for simultaneous generation of up to four DAB ensembles
  • GPS receiver integrated
  • Gigabit Ethernet interface
Range of applications
  • DAB Signal Recorder / Player / Analyzer
  • Capturing of ETI files from on-air signals
  • Coverage measuring
  • SFN analysis
  • COFDM modulator for receiver testing
  • Core component for re-transmitters and tunnel break-in systems

The DABRF device was developed as core component of the patented tunnel break-in system, MAGIC TBR from AVT Audio Video Technologies GmbH, that, in the event of a disaster, allows to supply a street tunnel with live warning messages via digital radio. Those systems require the DAB signal containing the warning message transmitted within the tunnel to mimic the ensemble outside the tunnel, as well with regard to its multiplex structure as to its timing. If not doing so, when the emergency warning begins, the DAB receivers inside the tunnel would lose the signal, and would be required to perform a time consuming re-synchronisation.

The DABRF and the underlying techniques are covered by several patents, among others DE10134920B4, EP2846485B1 and DE102013109795B4.

In particular, since 2015, the DABRF replaces the established DAB test receiver, UEB400-DXP, within the DAB-XPlorer family of DAB analysing tools. In this application, the DABRF offers a great potential for future extensions of the collection of powerful analysis tools of the DAB-XPlorer suite.


ETI Stream Analyzer, Recorder, Player.


DAB-XPlorer - a set of tools to analyze DAB data streams.
Key features
  • Modular system consisting of hard- and software tools
  • Hardware ETI interface and receiver hardware available
  • Analysis of DAB multiplex on ETI, EDI and RDI signal
  • Analysis of FIC (Fast Information Channel) on bit level
  • Measuring of synchronism in SFNs
  • Recording of ETI files from on-air signals via RDI
Range of applications
  • ETI analysis for broadcasters
  • DAB Transmitter setup
  • DAB Coverage measuring
  • DAB SFN test
  • Test of DAB transmitter components
  • Test of DAB receivers in the laboratory

For historical reasons the term DAB-XPlorer stands for two things a) the DAB-XPlorer software suite providing a collection of software tools to analyze DAB data streams and b) for the DABXPlorer hardware providing an ETI/RDI-to-USB interface. Originally, both the software and the hardware have been one product, the DAB-XPlorer, developed and manufactured by Ingenieurbüro Mulka. In the course of the evolution of this product, the software was modified and extended to support additional hardware products from other vendors. At this time the DAB-XPlorer software suite supports and can be delivered with:

  • ETI/RDI-to-USB converter DAB-XPlorer
  • DAB test receiver and modulator DABRF
  • all Ethernet interfaces that can be used to receive EDI data streams
  • DAB test receiver UEB400-DXP provided under the trademark VAD
  • products of VDL’s DABSTOR family


Related to DABRF and DAB-XPlorer.