It is always interesting to watch TV or listen to radio programs from across the border. If a transmitter in a neighbouring country broadcasts at the same frequency as one in your country however, the pleasure may be short-lived, since reception will be disturbed by interference. So it is indispensable to coordinate allocation of transmitter frequencies - a job for national regulatory authorities. In Sri Lanka,
for instance, Rohde & Schwarz has installed a nationwide Spectrum Monitoring and Management System ARGUS-IT that is described here. This system is suitable for the mission of regulatory authorities.
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