NEXUS in use at the Messe Duesseldorf

 

messe duesseldorf

The User: Andreas Noch talks about the new emergency-paging/public-address system at Messe Düsseldorf (Germany). He is the head of the audio/video department and was the driving force behind the renewal of the emergency paging system in Düsseldorf.

More than an Alarm System

»An emergency-paging system must work under any conditions – otherwise, lives are at risk. Imagine what happens if an evacuation notice cannot be understood,« says Andreas Noch, head of the audio/video department at Messe Düsseldorf. Therefore, his top priority for a new emergency-paging system was that it had to be absolutely fail-safe. With this in mind, the installation at Messe Düsseldorf saw the introduction of a novelty: continuous monitoring of all system components. The core of the system – the audio-signal distribution – is based on NEXUS; this is another evidence for the system's flexibility and reliability!

The Concept

A total of 17 networked NEXUS routers were installed in various locations around the park to ensure efficient emergency paging/public address in all of the 15 exhibition halls. Because this kind of installation requires features that are quite different to what one may come across in a NEXUS broadcasting or studio environment, the contractor SAAVS Friedrich Salzbrenner GmbH developed a special C.A.S. 200 controller for this particular application of a NEXUS-driven network. In this setup, NEXUS acts as an audio router for announcements via the installed 100V-line public-address system while being controlled and monitored by the C.A.S. 200.

Transparent Networking

Each hall and the main building have their own NEXUS router feeding the power amplifiers. Thanks to this decentralized setup, each hall can function independently in emergencies – a requirement imposed by the local fire brigade. To comply with this prerequisite, every hall must allow for paging and emergency announcements even if the connection to the central monitoring station at the main building is broken.
The digital architecture of NEXUS provides several advantages for paging and public-address systems. One of them is the significantly lower wiring overhead because a single optical cable can transfer up to 128 audio channels plus control signals. Another benefit of the system is that all NEXUS units can be connected to one another using a single optical cable. This brings the estimated 100,000 meters of copper wire for the transfer of individual signals down to a mere 6,500 meters of optical cables, saving 650,000 Euro.

Reliability

The C.A.S. 200 controller of the system continuously runs test routines on the entire network. In this way, possible failures can be pinpointed and located with utmost precision. One of the main monitoring routines that were implemented at Messe Düsseldorf's explicit request is the continuous and reliable monitoring of all of the 142 speaker lines. The routine identifies cable failure, accidental grounding, and shorts even while the system is in operation. The statuses of the optical-cable network, automatic system checks, and power-amp monitoring are available at any time. Any malfunctions are not only indicated but also bypassed wherever possible: if a component fails, the system will automatically enable a preset emergency routine. For example, if a power amplifier fails, the signal is immediately diverted to a second – redundant – power amplifier. A higher degree of safety is hard to imagine.

Flexibility

Compared with Messe Düsseldorf's previous analog system, the NEXUS network sets new standards in flexibility. Just one example: Düsseldorf hosts the annual BOOT fair (international consumer show for boats and water sports). Before the opening of the fair, the engineer will identify all required emergency-paging channels and announcement counters and will enter them into the C.A.S. 200 where the settings will be stored as a status. Such a status needs to be configured only once and can afterwards be loaded every time Düsseldorf plays host to the BOOT fair. The memory system allows Andreas Noch and his team to set up the paging circuits required for all of the 55 fairs held in Düsseldorf every year, and to recall the settings by the press of a button when the time of an event comes. For additional convenience, it is possible to make the system ensure perfect automatic line routing by entering the events into a system agenda.

Even Better than the CD

In professional recording circles, NEXUS is known for its superior audio quality. Likewise, all public announcements at Messe Düsseldorf are clearly understandable thanks to a 24-bit resolution and a sample rate of 48 KHz. This is not just easy on the ears but also a safety feature, for emergency announcements will be perceived as such – and be understood. The basic sound quality is further enhanced by selective filtering and delaying of all signals using NEXUS' internal processing circuits.

Thanks to its audio quality, a similar C.A.S. 200 system at Neuen Messe München (New Fairgrounds in Munich) is used not only for emergency paging and public address but also as sound-reinforcement system for various events – an idea that was also implemented by Messe Düsseldorf. Therefore, an audio line runs from the C.A.S. 200 to the onsite recording studio. The first sound-reinforcement tests proved conclusive. Says Andreas Noch: »We use the system for three applications: emergency paging, announcements, and background music/musical sound bites, though it must be said that emergency announcements will remain our top priority. They can override and mute any other signal.«

It is no coincidence that one of the most advanced and reliable emergency-paging and public-address systems was built in Düsseldorf. The recent fire disaster at the airport still haunts people's memories. »The reliability aspect alone was not sufficient as we demanded more from an entirely new system such as a high degree of concurrency and a flexibly programmable system hierarchy,« says Noch. »We ended up with a solution that provides a lot more than we bargained for. After all, we can now tailor the address system to our customers' needs, thereby contributing to the success of a show.«

TV and Radio Broadcast

AVATUS & NEXUS/NEXUS STAR

  • HSE24 Home Shopping Europe AG  Ismaning, Germany
  • RSI Broadcast Center  Lugano, Switzerland
  • tpc Metechno, Broadcast Center  Zurich, Switzerland

AURUS & NEXUS/NEXUS STAR

  • Antena 3 Madrid (TV)  Madrid, Spain
  • ASTRO (Malaysian satellite television) Kuala Lumpur, Malaysia  weiterlesen blau 2019
  • Anhui TV  Hefei-Anhui, China
  • Auditorium Rai di Napoli  Naples, Italy
  • BBC Scotland Glasgow, United Kingdom weiterlesen blau 2019
  • BR Bayerischer Rundfunk  Munich, Nuremberg, Germany weiterlesen blau 2019
  • Canal 9  Valencia, Spain
  • CCTV  Beijing, China weiterlesen blau 2019 weiterlesen blau 2019
  • Crow TV-Studio  Tokyo, Japan
  • Deutschlandradio  Berlin, Cologne, Germany
  • Deutsche Welle TV  Berlin, Germany weiterlesen blau 2019
  • FM 802 Radio  Osaka, Japan weiterlesen blau 2019
  • FRANCE 2  Paris, France
  • Fuji TV  Tokyo, Japan  weiterlesen blau 2019
  • HSE24 Home Shopping Europe AG  Ismaning, Germany
  • HR Hessischer Rundfunk Frankfurt, Germany
  • J.V.E. facilities   Almere, The Netherlands  weiterlesen blau 2019
  • MDR Mitteldeutscher Rundfunk  Leipzig, Germany weiterlesen blau 2019
  • NDR 2  Hannover, Germany
  • NDR Norddeutscher Rundfunk Hamburg, Hannover, Kiel, Schwerin, Germany
  • Plazamedia TV&Film Produktion  Ismaning, Germany
  • Phoenix TV Station  Bonn, Germany
  • RAI  Rome, Milan, Naples, Torino, Italy  weiterlesen blau 2019
  • Radio Bremen  Bremen, Germany  weiterlesen blau 2019
  • RAI Radio  Rome, Italy  weiterlesen blau 2019
  • Rom TV  Rome, Italy
  • RTS Radiotelevisione svizzera  Geneva, Switzerland  weiterlesen blau 2019
  • RTBF Brussels, Belgium  weiterlesen blau 2019
  • RTM Kuala Lumpur  Kuala Lumpur, Perdana, Seremban, Malaysia  weiterlesen blau 2019
  • RSI - Radiotelevisione svizzera  Lugano, Switzerland
  • TAI Television News Agency  Warsaw, Poland
  • Television de Galicia  Galicia, Spain
  • TVP Telewizja Polska  Warsaw, Poland  weiterlesen blau 2019
  • Tianjin Radio Station  Tianjin, China
  • tpc zürich ag  Zurich, Switzerland  weiterlesen blau 2019
  • TSR Télévision Suisse Romande  Geneva, Switzerland
  • TVE Radio Televisión Espanola  Madrid, Spain
  • WDR Westdeutscher Rundfunk  Cologne, Bocklemund, Dusseldorf,  Germany  weiterlesen blau 2019

CRESCENDO & NEXUS/NEXUS STAR

  • ASTRO  Kuala Lumpur, Malaysia  weiterlesen blau 2019
  • Anhui TV  Hefei-Anhui, China
  • CCTV  Beijing, China
  • CBC Cologne Broadcasting Center  Cologne, Germany
  • Formosa TV  Taipei, Taiwan  weiterlesen blau 2019
  • Fujian tv  Beijing, China
  • Hangzhou TV  Hangzhou, China
  • HR Hessischer Rundfunk  Frankfurt/Main, Kassel, Germany
  • HSE24 Home Shopping Europe AG  Ismaning, Germany
  • HBTV Hubei Broadcasting Group  Wuhan, China
  • HNTV  Zhengzhou, China
  • JiangSu Broadcasting Corporation (JSBC)  Nanjing, China
  • Korean Broadcasting System (KBS) Yeongdeungpo District, Seoul, Korean
  • Life News TV, Moscow, Russia
  • M6 TV  Paris, France
  • Media Prima Berhad  Kuala Lumpur, Malaysia
  • NDR  Hamburg, Germany
  • NOSPR Narodowa Orkiestra Symfoniczna Polskiego Radia  Katowice, Poland
  • ONE TV / Dorna Sports Management Rome, Italy
  • Plazamedia TV&Film Produktion  Ismaning, Germany
  • Rede Bahia de Televisao  Salvador, Brazil
  • RTBF  Brussels, Belgium
  • RTM  Kuala Lumpur, Malaysia
  • RTS Radiotelevisione svizzera  Geneva, Switzerland
  • SBT Sistema Brasileiro de Televisao Sao Paulo, Brazil  weiterlesen blau 2019
  • Shenzhen TV  Shenzhen, China
  • Sveriges Radio  Stockholm, Sweden
  • tpc zürich ag  Zurich, Switzerland
  • TSR Télévision Suisse Romande  Geneva, Switzerland
  • TVE Radio Televisión Espanola  Barcelona, Spain
  • Vatican Radio  Vatican, Italy  weiterlesen blau 2019
  • Videohouse  Brussels, Belgium
  • VRT Brussels, Belgium

AURATUS & NEXUS

  • ASTRO TV  Kuala Lumpur, Malaysia
  • Bernama News TV  Kuala Lumpur, Malaysia  weiterlesen blau 2019
  • BR Bayerischer Rundfunk  Nuremberg, Germany
  • CCTV  Beijing, China
  • CJ E&M Brodcasting Centre  Seoul, Korea
  • EPTV  Campinas, Brazil
  • FFS Film- & Fernseh-Synchron  Berlin, Germany  weiterlesen blau 2019
  • Henan  Zhengzhou, China
  • HBTV Hubei Broadcasting Group  Wuhan, China
  • Moscovia Broadcasting Company  Moscow, Russia
  • OMTV - Olympic Marseille Football Team  Marseille, France
  • Plazamedia TV&Film Produktion  Ismaning, Germany
  • Radio Kuwait  Kuwait
  • RTBF Brussels, Charleroi, Belgium
  • RTL Radio  Paris, France
  • RTM TV  Sarawak, Malaysia weiterlesen blau 2019
  • RTM TV  Kuala Lumpur, Sarawak, Malaysia
  • SBT Sistema Brasileiro de Televisao  Sao Paulo, Brazil  weiterlesen blau 2019
  • Shenzhen TV  Shenzhen, China
  • Tele M1  Aarau, Switzerland
  • Tele 1  Luzern, Switzerland
  • VRT  Brussels, Belgium
  • WDR Westdeutscher Rundfunk Siegen, Bonn, Cologne, Essen, Wuppertal, Aachen, Münster, Bielefeld, Dortmund, Duisburg weiterlesen blau 2019  Germany

ON AIR flex & NEXUS/NEXUS STAR

  • ABC Australian Broadcast Corporation  Sydney, Canberra, Hobart, Brisbane, Perth, Melbourne, all Australia
  • Al-Watan Radio Kuwait  weiterlesen blau 2019
  • ASTRO (Malaysian satellite television)  Cyberjaya, Malaysia
  • CCTV Movie Channel  Beijing, China
  • HR Hessischer Rundfunk  Frankfurt, Germany
  • HSE24 Home Shopping Europe AG  Ismaning, Germany
  • NDR (tv station) Kiel, Hannover, Germany
  • Plazamedia TV&Film Produktion  Ismaning, Germany
  • Radio Pilatus   Lucerne, Switzerland  weiterlesen blau 2019
  • SDTV QILU Channel  Beijing, China
  • Shanghai Education Television  Shanghai, China
  • tpc Zürich  Zurich, Schwitzerland
  • WDR  Duisburg, Dusseldorf, Wuppertal, Germany
  • Xiamen Travel Channel  Xiamen, China

NEXUS/NEXUS STAR

  • All India Radio New Delhi, India  weiterlesen blau 2019
  • Antena 3  Madrid, Islas Baleares, Spain
  • BBC  London, United Kingdom
  • BBC North Manchester, United Kingdom  weiterlesen blau 2019
  • BR Bayerischer Rundfunk Freimann, Germany  weiterlesen blau 2019
  • Cadena SER  Madrid, Barcelona, Valencia, Spain  weiterlesen blau 2019
  • Canal Mundo Radio  Madrid, Spain
  • Canal+: Paris, France  weiterlesen blau 2019
  • 20th Century Fox  Los Angeles, USA
  • CBS  New York, USA
  • ESPN  Bristol, Los Angeles, USA
  • ETABETA  Rome, Italy
  • Eurosport 2  Paris, France
  • HR Hessischer Rundfunk Gießen, Fulda, Darmstadt, Wiesbaden, Kassel, Germany weiterlesen blau 2019
  • HR Hessischer Rundfunk  TR 3  Frankfurt, Germany  weiterlesen blau 2019
  • IRT Project Hybnet  Munich, Germany
  • NBC  New York, USA
  • NHK  Tokio, Japan
  • n-tv  Berlin, Germany
  • ORB/DVB-FSZ Ostdeutscher Rundfunk  Potsdam, Germany
  • ORF Eisenstadt, Dornbirn, Austria
  • Onda Cero Radio  Madrid, Spain
  • ONE TV / Dorna Sports Management Rome, Italy
  • Polskie Radio S.A.  Warsaw, Poland weiterlesen blau 2019
  • Portuguese Broadcasting Service  Lisbon, Portugal
  • PTT  Madrid, Spain
  • Public Radio of the Ukraine  Kiew, Ukraine
  • Radio Caracol  Bogota, Colombia
  • Radio Cope  Madrid, Spain
  • Radio 9  Valencia, Spain
  • Radio France  Paris, France
  • Radio Traffic  Paris, France
  • Radio Marca  Madrid, Spain
  • RBB FS Berlin, Germany
  • RPP Radio Programas del Peru  Peru
  • RTS Radiotelevisione svizzera  Geneva, Switzerland   weiterlesen blau 2019
  • RTL Berlin, Germany
  • SAT 1  Zurich, Switzerland
  • SFB Sender Freies Berlin  Berlin, Germany
  • Staatlicher Rundfunk Usbekistan  Uzbekistan
  • Studio Hamburg  Hamburg, Germany
  • SWR Südwestrundfunk Stuttgart, Baden-Baden, Germany  weiterlesen blau 2019
  • Tele 5  Madrid, Spain
  • Televisión de Galicia  Santiago de Compostela, Spain
  • TF 1  Paris, France  weiterlesen blau 2019
  • TV 1 Napoli  Naples, Italy
  • Unitel  Unterföhring, Germany
  • Vatican Radio Vatican, Italy  weiterlesen blau 2019
  • Yunnan TV  Kunming, China
  • ZDF Mainz, Berlin, Germany
OB Trucks
Theatres and Operas
Live
Exhibitions, Conventions, Art Centres
Film Studios
Public Buildings
Universities
Sports Venues
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