Propagation of Radio Waves above 30MHz.
VHF versus UHF
Digital Versus Analogue transmission.
Advantages and disadvantages of digital systems, compared with analogue.
Digital Repeater standards (dPMR, DMR, Tetra etc)
Coaxial lines, and considerations
Impedance mismatch implications
Code Plugs and system programming
Designing a reliable communications repeater system.
Regulatory licensing (Ofcom)