European (CE mark) testing requirements for 2.4 GHz devices have changed greatly with the introduction of EN300 328 v1.8.1 and v1.9.1. New, unique measurement techniques have been added for FHSS equipment. The standard has also been adapted to recognize technologies using MIMO such as WLAN and LTE. Additionally, the parameters of spurious emissions testing has changed from a constant resolution bandwidth to resolution bandwidths that vary by measurement frequency. The changes can affect the rating of harmonics when measuring above 1 GHz.