The mast amplifier for DTT is installer in single installation. This must installer with a power supply for amplifier antenna mast.
The Headends amplifier is always installed in on the mast where the antenna is installed DTT, about one meter away from it. Instead, the power supply is always installed inside at house and sent via coaxial cable needed (usually 12 or 24 Vdc) voltage amplifier mast.
The most important parameter or an amplifier mast is the gain, also it is so important the noise figure.