DANSK DS/IEC/TR 62002-4 PDF

The purpose of this Technical Report is to serve as a standard method to test Total Radiated Sensitivity (TRS) of a category c) terminal specified in IEC 62002-1. This is a practical measure of the radiated sensitivity as it takes into account both the terminal antenna efficiency and possible terminal generated additional noise. Moreover it can be used directly in the link budget calculations for the network coverage predictions. The motivation for the TR has been the lack of suitable measurements methods to characterise the terminal antenna in common and practical way. As the 3GPP TR 25.914 method is in many ways suitable for the task, it was decided to develop a simplified version of this taking account the special requirements for the broadcast terminals. The test method applies to terminals in terminal category c) with either internal or external antenna. The effect of the user to the antenna radiation pattern is not taken account. The method is based on a 3-D radiation pattern measurement. First a full 3-D 4ð sensitivity measurement is performed at three frequencies with both polarisations. From this the TRS at these frequencies can be calculated. The best direction for sensitivity at the middle frequency is observed and then the Effective Isotropic Sensitivity (EIS) is measured to this direction at all specified reception channels. It is assumed that the average difference between the measured EIS and TRS is valid also for the other frequencies and thus the TRS at all specified channels can be calculated.