A method, performed by a network node , for providing a Radio Frequency, RF, model of a telecommunications system , wherein the telecommunications system comprises cells , wherein the method comprises: configuring (A030), for at least a set of the cells , reporting of call traces indicative of: a first type of measurement event relating to serving cell with a first time-to-trigger value and a first threshold value, and a second type of measurement event relating to neighbouring cells with respect to the serving cell with a second time-to-trigger value and a second threshold value, wherein the first time-to-trigger value is greater than the second time-to-trigger value, and wherein the method comprises: receiving (A090), from each cell of the set, a respective call trace representing a first reported measurement event of the first or second type for a connection in said each cell, processing (A100), for said each cell of the set, the respective call trace to extract an Reference Signal Received Power "RSRP" for said each cell of the set or to extract a Carrier-To-Interferer ratio "C/I" for said each cell of the set with respect to an interfering neighbouring cell, forming (A110) a first distribution of RSRP based on the extracted RSRP for said each cell of the set, forming (A120) a second distribution of C/I based on the extracted C/I, wherein the first and second distributions represent an RF model, and sending (A130) the RF model to a network management tool for managing performance of the telecommunications system . configuring (A030), for at least a set of the cells , reporting of call traces indicative of: a first type of measurement event relating to serving cell with a first time-to-trigger value and a first threshold value, and a second type of measurement event relating to neighbouring cells with respect to the serving cell with a second time-to-trigger value and a second threshold value, wherein the first time-to-trigger value is greater than the second time-to-trigger value, and a first type of measurement event relating to serving cell with a first time-to-trigger value and a first threshold value, and a second type of measurement event relating to neighbouring cells with respect to the serving cell with a second time-to-trigger value and a second threshold value, wherein the first time-to-trigger value is greater than the second time-to-trigger value, and receiving (A090), from each cell of the set, a respective call trace representing a first reported measurement event of the first or second type for a connection in said each cell, processing (A100), for said each cell of the set, the respective call trace to extract an Reference Signal Received Power "RSRP" for said each cell of the set or to extract a Carrier-To-Interferer ratio "C/I" for said each cell of the set with respect to an interfering neighbouring cell, forming (A110) a first distribution of RSRP based on the extracted RSRP for said each cell of the set, forming (A120) a second distribution of C/I based on the extracted C/I, wherein the first and second distributions represent an RF model, and sending (A130) the RF model to a network management tool for managing performance of the telecommunications system . <EOS>