New Delhi / Jaipur - The international DRM Consortium has just concluded successfully the demonstration and trial of the DRM digital radio standard in the FM band in New Delhi and Jaipur on March 22th 2021.
As well as other members of the DRM Consortium like Fraunhofer IIS, Nautel or NXP, RFmondial gave its full support and provided its Monitoring Receiver RF-SE19 and the DRM Modulator RF-LV.
In Delhi, the trial demonstrated how to transmit a single DRM signal and multiple pure digital DRM signals side-by-side from the same transmitter, using also DRM`s simulcast option by putting on air both an analogue FM and a digital DRM signal from a single transmitter.
In Jaipur, the DRM Consortium showed on a separate antenna on the same tower for the first time in a live on-air environment, how Multi-DRM configurations with 4 and even 5 DRM blocks can efficiently use the white-spaces in-between two existing analogue FM services, while not effecting the reception of those ongoing FM services at all.
During the demonstration, DRM clearly showcased that the DRM standard used in the FM band is backward compatible. The DRM receivers in operation during the trial all supported DRM in both AM and FM bands. They comprised car receivers, DRM reception on mobile phones and tablets, portable and desktop radios as well as professional monitoring receivers.
For more details, please read Press Release.
The Russian television and Radio Broadcasting Network ordered and funded the effort with support by the russian transmitter manufacturer Triada-TV and some key members of the DRM Consortium. Also Dr. Albert Waal, Managing Director of RFmondial GmbH, helped enable the system to be tested in a real commercial environment with a wide variety of reception condition.
The objective of the simulcast DRM and analog FM demonstration was to measure the coverage performance of DRM in the FM band and to verify the predictions made for the coverage area. One of the main focus of the trial is to find out that there no interference to analog FM by DRM during simulcast transmission.
Overall coverage was measured by driving along all major routes through the region, around 1800 kilometers in total. One of the test vehicles was equipped with a RFmondial RF-SE19 professional monitoring receiver. Also the RFmondial DRM ContentServer and the RFmondial modulator RF-LV has been used for the transmission test equipment. The trial is continuing at the moment.
For further information concerning the first test results please visit the Digital Radio Mondial website.
The discontinuity of Flash Support will also affect the DRM / AM Monitoring Receiver Product Line RF-SE of RFmondial, for example the remote user interface will not work anymore, and no updates including any security patches can be performed anymore.
As a result, RFmondial has developed a fresh advanced user interface using state-of-the-art HTML5 technology, which natively runs in all major web browsers. The development based on RFmondial`s long-term experience in the design of graphical measurement interface and has already been applied in the DAB Monitoring Receiver Product Line RF-DAB.
One of the topics discussed was the future use of DRM in VHF band II to compensate the switching-off of FM broadcast. Concerning this issue, the participants of the meeting were informed about a field trial in Kopenhagen / Denmark starting in 2020. Further important topic was the DRM datacasting to critical infrastructure like hospitals or power stations.
It`s a good opportunity to showcase latest developments, new devices and their features and technical advances, to ask questions and connect with the global DRM familiy.
During the ZOOM broadcast, Dr. Albert Waal, Head of Hardware Development of RFmondial, will present the latest HTML5 Gui Update of DRM / AM Monitoring and Measuremnet Receiver Familiy RF-SE. He will also talk about the new product line DRM Exciter LVe and the extended DRM Multiplex.
For detailed information or for confirming the participation, please click here.
The ability to freely mix and combine analog and multiple digital DRM signals, in adjacent channels, with individually varying power levels, supporting single frequency networks, allows broadcasters, network regulators and frequency planners a new dimension of possibilities for planning and operating digital radio networks using established planning parameters for both DRM and FM services.
In an expertly article of the professional journal of IEEE (Institute of Electrical and Electronics Engineers) Philipp Schmid, chief technology officer at Nautel, and Stefan Galler, chief executive officer at RFmondial, report about the exciting development of this concept. Click here to read the whole article.
For these successful transmissions, they also use RFmondial DRM ContentServer, as well as the RFMondial Monitoring Receiver RF-SE12 and the RFmondial Livewire audio router RF-LW. The DRM shortwave transmissions are from USAGM`s Greenville, North Caroline, site.
The intension of USAGM for these tests is to gain experiences with dfferent modes and services available on DRM, as reported by the professional journal "Radio World". In addition, they also want to help to push the development of low-cost receivers.
BES India showcases DRM expansion plans.
At Delhi`s Broadcast Engineering Show (BES) in February 2020 there was a big contingent of companies showing DRM transmission and receiver technology. Also Dr. Jens Schroeder, CEO of RFmondial GmbH, presented successfully its professional products and services for the digital broadcasting industry, and gave a lecture concerning the DRM transmitter infrastructure.
The DRM Consortium exhibition stand was demonstrating convincingly AIR (All India Radio) broadcasts in pure DRM on the variety of receivers on display. They ranged from very low-cost type receivers to full-feature DRM sets complemented by automotive solutions.
One interesting development from DRM was the idea of a digital community notice board placed in a central location in a village which can play the radio to embedded speakers, display news, advertisement and short messages to a screen, and broadcast emergency warnings when required. For the public display signage demontration click here.
Another innovation was the online monitoring of the live DRM content of selected transmitters from all over India allowing both technical and editorial staff to monitor DRM in real time.
So on the last day of the conference, DRM-Chair Ruxandra Obreja summarized this successful event: "DRM is already in India in AM and the extension to FM, thus using the full, open DRM standard would create the largest digital market in the world."
The DRM Consortium (www.drm.org) and some of its Indian and international members and partners, including RFmondial, will welcome all visitors at Hall 7A -Booth 61, ready to present the latest DRM receiver models and solutions. They will highlight its recent achievements under the overarching theme "DRM for India - Smart radio for ALL".
The theme for the BES conference (in Halls 7ABC&E) is "Disruptive Technologies: Shaping Future Broadcasting". With more than 1.000 delegates, speakers and panelists from India an abroad, the conference is rated as the biggest in Asia. The conference will also include four DRM contributions. As part of this forum, Dr. Jens Schroeder, CEO of RFmondial GmbH, gives a lecture on "Shared DRM Transmitter Infrastructure - A Revolutionary Approach to FM Digitisation" (14 February 2020, 11:30h - 13:00h).
Please contact Jens Schroeder, CEO, for scheduling a meeting at BES EXPO 2020 (schroeder[at]rfmondial.de), +49 (179) 1232059
Islamabad, October 2019 - The public broadcaster in Pakistan, PBC, successfully demonstrated the first ever DRM for FM test transmission on a consumer receiver in Pakistan. The country joins thus Russia, Indonesia, South Africa that have been demonstrating very recently the quality and efficiency of DRM in the FM band.
For the current demo setup which is located at the National Broadcasting House PBC headquarters in Islamabad, they also used the RFmondial DRM ContentServer and the DRM+ Monitoring Receiver. The project also benefited from the support of Hedra Technology, Pakistan, Fraunhofer IIS, Germany and the DRM international Consortium.