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V G Malagi, who is in the R and D division of AIR, New Delhi, was in Ahmedabad for monitoring the DRM signals transmitted from AIR, Khampur. He said the digital technology was launched after a series of tests and trails over the past two years.
He explained that the existing Short Wave (SW) transmitter at Khampur Delhi had been modified for DRM broadcasting and radiating at frequency 6100 Khz from 2.30 pm to 5.30 pm daily on 100 KW power. The primary expected coverage area of this system is in the radius of 800 kilometer.
BES honorary secretary, Gujarat Chapter, and the Station Engineer of AIR-Ahmedabad Meenakshi Singhvi said the DRM was a consortium of about 75 broadcast-related organisations, which had worked to develop a digital transmission system for the current AM broadcast bands. “The DRM system provides a universal, non-proprietary, digital transmission system designed to replace, eventually, the current analogue transmissions in the LW, MW and SW bands."
She said DRM offers great advantages for listeners like excellent reception quality, no more fading, noise or interference. Experts present believed that DRM would slowly replace AM broadcastings to become the "digital AM" by using the existing band and infrastructure with little modification in the transmitter and with the present listening habits.
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