JAKARTA, Indonesia � The Digital Radio Mondiale Consortium and Indonesian public broadcaster RRI successfully demonstrated DRM for local coverage in a simulcast mode from the Indonesian island of Batam, overlooking the Singapore Straits, during May 16�18. �
The DRM signal was inserted into the existing and crowded FM local spectrum. The existing FM is at 105.1 MHz, and DRM was placed at 105.25 MHz. The current analog transmitter chosen for this has a power of 5kW, and 0.5KW DRM power was used. Good coverage area was achieved with only 10% of analog power.�
On May 17, participants representing the leadership of RRI, many RRI station managers and experts, the Ministry of Communications, the regulator, private broadcasters and the industry took a field trip to check the audio and coverage quality of the simulcast signal. Both the indoor and mobile reception were found to be good and no interference was noted to the neighboring FM stations at 105.1 MHz and 105.5 MHz.
During the three days of presentations, practical work, and questions and answer sessions, participants checked the benefits of digital radio for local coverage: excellent audio, multimedia features including Journaline, advanced text and images, good coverage and efficient energy use.
RRI is adding the Batam DRM demo to its list of successful demonstrations of DRM in the AM bands (medium wave) for large-area coverage in Bogor (2015) and in Bali (2016). Mr M Rohanudin, the RRI President, the RRI CTO and other participants welcomed the findings of the Batam demo, which is the first high power simulcast demo of DRM for local coverage in the Asia Pacific region.
The demo was supported by RRI, Fraunhofer IIs, GatesAir and RFmondial.