 margin. Therefore the mobile is still for a short time connected to the first cell while the dominant cell is already the second one. The theoretical calculation of coverage thresholds was explained earlier. The coverage thresholds are a way to analyse the coverage area in the planning phase and compare it to the planning requirements. Therefore it is useful to set the coverage thresholds used in the planning tool in line with the planning targets. Sometimes thresholds used in the printouts are separately agreed with the operator in order to make it easier to compare the different versions. There can also be several threshold sets, with the first one giving the thresholds for all the morphological types in the area. Separately there can be a threshold for different types of receivers, according to defined MS classes. One threshold is set to illustrate indoor coverage, SO that building and car, etc., penetration losses are taken into account. Careful coverage planning is important to encourage carefulness throughout the network planning process. The accuracy of the coverage plan is a sum of several factors. Map resolution and accuracy affect the propagation model as well as the accuracy of the model tuning measurements. Important factors during the coverage planning phase are accuracy of the link budget parameters, BTS coordinates and other coverage planning parameters. The measurable link budget parameters, cable loss and BTS Coverage Planning Table 2.10 Measured signal level mapping to RXLEV Signal level minimum Signal level maximum RXLEV 0 RXLEV 1 RXLEV 2 RXLEV 3 RXLEV 61 RXLEV 62 power need to be verified with measurements when possible. The parameters need to be verified SO that the same numbers are used from the planning through to the actual BTS. The coordinates measured for the actual BTS during site hunting are essential because they are used for coverage planning in the planning tool. Construction parameters related to the antenna are remarkable when talking about accuracy issues, actual antenna height 