As a region with volcanic activity, Indonesia has mountain ranges, with its highest peak on Papua, with Puncak Jaya, standing 4,884 meters (16,024 feet) above sea level. Major rivers in Indonesia include the Mahakam and Barito rivers, and the country's largest lake is Lake Toba in Sumatra.
To compensate, analog signals are amplified, ad digital signals are regenerated through repeaters. In a Half-duplex transmission, signals can travel in both directions over a medium BUT in only one direction at a time. When signals can travel in both directions over a medium simultaneously, the transmission is considered full duplex. A form of transmission that allows multiple signals to travel simultaneously over one medium is known as multiplexing. In multiplexing, the single medium is logically separated into multiple channels, or sub channels. Throughput is the amount of data that the medium can transmit during a given period of time.
An AM signal encodes the information onto the carrier wave by varying its amplitude in direct sympathy with the analogue signal to be sent. There are two methods used to demodulate AM signals 1  : The envelope detector is a very simple method of demodulation that does not require a coherent demodulator.here are several ways of demodulation depending on how parameters of the base-band signal such as amplitude, frequency or phase are transmitted in the carrier signal. For example, for a signal modulated with a linear modulation like AM (amplitude modulation), we can use a synchronous detector.