The methods of measurement described in the following sections of this part apply to subsystems including those which are not part of a simulated system (e.g. antennas). The methods are intended to cover those electrical characteristics which influence the performance of radio-relay systems and should be used in conjunction with Part 1 of this publication: Measurements Common to Sub-systems and Simulated Radio-relay Systems. Values for the various quantities to be measured are not specified since these should be given in the detailed equipment specification.