 area is defined by an administrive boundary (state, region, province or city) and the services are defined by the possible use of the radio terminal, e.g. inside the buildings or outside the buildings or a mix of them. When the objectives are clear the radio base station configuration and its antenna system must be defined. The network planner should know the various radio base station configurations (e.g. indoor base station, operational frequency band, maximum output power, diversity system, etc.) and the available antenna systems. According to the scope of the project and specific requirements, the proper radio base station configuration and antenna system will be selected. For each selected system and each radio terminal type, a radio link power budget must be calculated. The radio link budget analyses the gains and losses between the base station transmitter and the mobile receiver (downlink) and between the mobile station transmitter and the base station receiver (uplink) in order to calculate the path loss in the uplink and downlink. The path loss in the uplink should be the same as that of the downlink in order to calculate correctly the allowable base station EIRP. The main parameters to be taken into account in the radio link power budget are: Maximum output power of the radio base station and mobile terminal Receiver sensitivity of the radio base station and mobile terminal Cables losses Antenna gains Other losses, such as human body or combiner, duplexer, etc. The ETR-300-1 shown in figure D.8 is an example of a radio link power budget. The scope is to calculate the equal propagation loss for the uplink (mobile station->radio base station) and downlink (radio base station->mobile station) by modulating the output power of the radio base station within its limits. When the base station EIRP has been calculated, using the proper radio propagation mode the theoret- ical cell range can be calculated in the different environments composing the area of interest (e.g. urban, Introduction to TETRA Network Pl