A communication system is composed of a fixed-frequency transmitter T 1 and a fixed-frequency receiver R 1 . The fixed frequency is f 1 and both receiver and transmitter have constant hazards l. In...

A communication system is composed of a fixed-frequency transmitter T₁
and a fixed-frequency receiver R₁. The fixed frequency is f
₁
and both receiver and transmitter have constant hazards l. In order to improve the reliability, a second receiver and transmitter operating on frequency f
₂
are used to provide a redundant channel. Both channels are identical, except for frequency. Construct a reliability diagram for the system and write the reliability function. In order to improve reliability, a tuning unit is added to each receiver so that it can operate at frequency f
₁
or f
₂.