An MF/HF Coast radio is built with an operator position, a transmitter site and a receiver site. The reason for parting transmitter and receiver on separate sites and antennas, is to avoid the transmitter signal to block the receiver signal. The longer distance between the two sites, the better. The communication between the operator and the transmitter/receiver sites are mainly by telephone cable (fibre optic) or microwave link. Connection between transmitter/receiver and antennas are coax cables.
MF/HF radios integrate an MF/HF DSC Controller. The DSC functions via the DSC Controller or Modem, which simply sends a burst of digital code on the MF/HF DSC frequencies, and will automatically “call” another MF/HF radio. This is feasible because each MF/HF DSC Controller has been allocated a unique MMSI number that acts like a telephone number.
- DSC Modem
- Transmitter Antennas
- Receiver Antenna
- Operator Control Unit
- Fundaments and infrastructure
- Extended Warranty