I’m new in BTS field and I’d like to earn my knowledge toward this field. May anyone give me Info. about how the system works? how the RF signals flow in and out? Input/Output power levels, receive sensitivity level, how to set up and commission to get the BTS up and running? What should I look for as the testing standpoint? and ect. (Nokia, Errission, motorola). anything would be appreciated. Thank you you all.