DAB/DAB+

DAB (Digital Audio Broadcast) completes to today’s FM coverage management for quite a while and will replace it in the future. This transition period will last probably, depending on market development, between 7 to 12 years. The latest is estimated to happen in 15 years. England and several other European countries already have shown a strong growing demand and increasing population of DAB audience. With DAB the utilisation period can be increased and cost savings can be achieved on a long term basis

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DAB is the only digital radio system, which will be established in Europe and other continents. It already did in some cases. From the technical point of view, other system are possible, but still the biggest task it not the construction of new broadcast networks, but the expand the number radio receivers among the audience. Neither Switzerland as a broadcasting area nor single private radios can achieve this target. This very big project can only be achieved on a European level. Therefore any investments in other systems do not make sense from the economical point of view.

Compared to the other known systems such as DVB, IBOC or HD-Radio, DAB has true advantages which allow profitability perspectives. DAB gives you the better reception with less transmission sites, and gives the possibility of new expanding channels for extra programs or data services. Also DAB is the platform, which meets the broadcasting demands of the future. The opinion, that the Swiss radio stations can make own decisions on systems changes or have an influence on other systems, or new programs which will established on the market, are not correct. Satellite radio and multimedia programs (like XM-Radio in the US) for the future for mobile reception prove, that these questions are out of date. To change digital radio expands platform makes sense only, when there will be a long term benefit and if it gives advantages to the content providers (radio-stations and others) and the audience. At the same time comparing products and services like MP3 players and multimedia applications on GSM, Edge or UMTS should be monitored closely. At the moment the DAB can cover all these conditions.
Digital radio is not only a technical matter, but it is mainly the matter of financial fund raising, as well as new media law and the strategy of each radio station. Digital radio / DAB causes huge challenges to Swiss radio stations. One can use these facts with positive skills and if one is late it can be a threat. Also the change of structuring in the radio branch demands an active political dialog. This bears an opportunity to the private radio stations to recover reception quality versus the Swiss Broadcasting company (SRG/SSR), but also the risk to be put in to the status of second class radios. In any case new expanded channels for radio program – with or without private radios – will be established(also via Satellite for mobile receiver). Every private radio stations should initiate their own strategies to refer to the time, when up to one hundred of pan Europe radio programs will be received all over the country.

New products of transmission systems will be necessary. The very interesting thing is multimedia and DAB-ability automatic station program like DABIS. If there will be no change by tomorrow, or the day after tomorrow, the DAB market can now develop faster than up to now. The success in the UK has stimulated the invests and product suppliers. The big potential in other European countries is obvious.

SRG/SSR (Swiss Broadcasting Company) will continue to establish a demand for the DAB receivers. Therefore SRG/SSR will maintain the leadership for DAB in Switzerland.

DAB Repeater

In car parkings, shopping centers or offices the reception of DAB+ is by no means self-evident. Especially in buildings with thick concrete or metal facades there is often no DAB+ reception. The DAB-Repeater developed by SUMATRONIC solves this problem. Buildings can be retrofitted at low cost so that the reception can be guaranteed in best quality.

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DAB repeaters work like very small radio stations. For legal operations, these must meet a large number of technical quality specifications and guidelines required by the Federal Office of Communications (OFCOM). This includes not only the amplifier but also various technical elements that avoid the interference of other radio transmitters (e.g. fire brigade, emergency services, ambulances, the police etc.)

Systems that do not comply with the legal requirements of OFCOM (NT-3003 V1.0.0) can lead to a liability risk.

Sumatronic has been offering compliant systems for many years, which are usually installed and measured in close cooperation with your in-house electrician / antenna installer. Operation of the system is maintenance-free and does not incur any license fees.

The DAB-Repeater is:

  • A quality product "Made in Switzerland"
  • Affordable and maintenance-free
  • Easy to install (by the house electrician)
  • Available in various designs
  • No operating costs (no fees, very little power consumption).
  • Risk-free! Meets OFCOM guidelines (no disturbance of emergency frequencies / radio by emergency services)
Specifications

General information of the Swiss OFCOM:

Please note that our DAB-repeaters are manufactured according to the regulations for Switzerland and Liechtenstein and the proper operation of our products in these countries indoors is legal. In other countries, there may be other regulations or laws that may restrict or even prohibit the use. The purchaser and/or the user are fully responsible for the full compliance with the laws and regulations in his country. Sumatronic expressly disclaims any liability.

The DAB-Repeater is a cost effective solution and available in various versions. Would you like more information or a more detailed consultation? Please contact us.

“We can hardly imagine our everyday sales activities without an installed DAB-Repeater in our store. Showing customers DAB+ radios without the repeater, is like showing TVs without pictures.”

Reto Roos, Leiter Sparte melectronics, Genossenschaft MIGROS Luzern

DAB Playout

The DAB playout consists in particular of the DAB ensemble multiplexer and the audio encoders. In the ensemble multiplexer, all the contents and control data of a DAB ensemble are coming together, receive their bandwidths and are packaged in the ETI signal, which is then routed to the broadcasters.

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Especially in the mountains, the topology often has a few unpredictable surprises. It is not uncommon that transmitters generates enough field strength but reflections of the waves on steep rock faces, water surfaces of lakes or in winter on snowy slopes significantly weaken the quality of the reception. In analog transmissions such as FM broadcasting, such interference are audible (especially in stereo reception). In digital systems (e.g. cellular phones, DAB, DVB...), the reception has high bit error rates which can maim or even break the connection.

Only the right design and the optimal location of the transmitter and the check with measurements ensure that your investment later can fulfill the most great expectations.

DAB Playout

DAB Tunnel Rebroadcasting System

The VDL Digital Radio Rebroadcast System for Tunnels enables tunnel operators to replace audio programmes with live or prerecorded announcements, providing information and instructions in the event of an emergency. The system monitors the live Ensemble for all current audio service configurations and automatically manages the replacement of normal programmes with the emergency announcement using the same audio bit-rate. This ensures a seamless transition and avoids receiver reconfigurations, which would otherwise lead to a delay in the reception of announcements. To prevent the need for receivers to re-tune, the system maintains RF frame synchronisation when switching between live programmes and announcements, thereby avoiding disruption to the digital radio signal. Systems can be configured for multiple languages and for separate announcements in each tunnel bore.

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The scalable design ensures that additional ensembles, audio channels and languages can be supported when new services are introduced into the transmission area. The system is equally suited to new installations, or updating existing AM/FM tunnel announcement systems. VDL’s Digital Radio Rebroadcast System is capable of meeting the requirements to rebroadcast DAB/DAB+ Ensembles and insert emergency messages. The system’s seamless break-in of announcements and synchronisation of transmission framing ensures that listeners can be made aware of emergency situations with the minimum possible delay This application provides a Graphical User Interface (GUI) to control and configure the VDL Tunnel Rebroadcasting System.

DAB-Repeater by Sumatronic

DAB Laboratory

We have a own DAB/DAB+ lab, where we can test receivers for their operational stability and radio automation systems for their ability to send multimedia content via DAB/DAB+.

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Wir können einerseits DAB-Ensembles aufzeichnen oder solche aus verschiedenen Ländern "abspielen" und via DAB-COFDM Modulator an einen Empfänger geben. Andererseits können wir auch praktisch beliebige DAB-Dienste inklusive Multimedia-Funktionen kreieren und Radio-Automatisationssysteme oder andere Zuspielsysteme auf deren Kompatibilität austesten. So können wir testen, ob und wie z.B. Bilder welche zusammen mit einem Radioprogramm verschickt werden, auf dem Empfangsgeräten dargestellt werden. Damit lassen sich Funktionstest und Optimierungen der Darstellungen durchführen, ohne dass diese Versuche "On Air" erfolgen müssen.

DAB-Repeater by Sumatronic
DAB-Repeater by Sumatronic

DAB+ Transmitter Antenna (DAB-ANT TX5)

In order to cope with the frequency spectrum of DAB Digital Radio, Sumatronic has developed a broadband transmitting antenna. Designed for small applications, the antenna can be installed inconspicuously with a magnetic base. The antenna is the ideal supplement for your indoor repeater system.

Specifications

Frequency range: 174 - 230 MHz
Cable length: 2.5m
Connection type: BNC
Length: 330mm + magnetic base 35mm
Weight: approx. 110g with magnetic base
Material: PTFE (Teflon)

DRR-2T Dual Tuner Digital Radio Receiver

The Digitalview DRR-2T Dual Tuner Digital Radio Receiver supports the latest advances in digital and analog radio reception and is designed specifically for commercial and large domestic installations. The DRR-2T provides two independent Digital (DAB+) and Analog (FM/RDS) tuners and is an ideal solution for multi-room radio distribution.

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Connecting the DRR-2T to an existing audio system is easy. The user has a choice of using analog or digital audio formats. All information related to reception and the operation of the DRR-2T is provided on a large high contrast LCD display. Where system integration is a requirement the DRR-2T offers both RS232 and IR control interfaces. The DRR-2T is designed for installation into an 1U/19″ rack. Overall construction is of the highest quality, with all mechanical and electronic parts selected to provide long term reliability.

Find out more: www.digitalview.ch

Main features

• Two Independent DAB+ and FM/RDS Tuners
• 20 User Assignable Presets
• FM Radio Reception with RDS
• Digital Audio Output – S/PDIF Optical and Coaxial
• Analog Audio Output – L&R Channels (RCA)
• Home Automation Control Interface – RS232 and IR with 3.5mm RTS Socket
• Designed for EIA 19 inch Rack Mounting
• Complies with MEPS for low power (< 1W) in Standby mode