This part of IEC 315 gives methods of measurement for the more important characteristics of general-purpose communications receivers. it is intended to be used with Parts 1, 3, and 4 of IEC 315. In particular, frequent reference is made to Parts 1 and 3, rather than reproduce considerable amounts of text. This part does not specify pe rformance of receivers. As far as possible, this part is consistent with the relevant parts of IEC 489, but it does not apply to the receivers dealt with in IEC 489. This part of IEC 315 applies to the receiver part of a transceiver if it falls within the definition in 1.3.1