Over deze norm
|Commissie||Geluid, beeld en multimedia-apparaten en -systemen|
This part of IEC 62002 gives 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 measurement methods to characterise the terminal antenna in a 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 method by taking into account the special requirements for broadcast terminals. The test method applies to terminals in terminal category c) with either internal or external antennas. The effect of the user on the antenna radiation pattern is not taken into account. The method is based on a 3-D radiation pattern measurement. At first a full 3-D 4π sensitivity measurement is performed at three frequencies with both polarisations. From this measurement 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 in 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.
|Nederlandse titel||Mobiele en draagbare DVB-T/H radio toegang - Deel 4: Meetmethoden voor "total radiated sensitivity" bij in de hand gehouden zendapparatuur (TA1)|
|Engelse titel||Mobile and portable DVB-T/H radio access - Part 4: Measurement methods for total radiated sensitivity in hand-held broadcast terminals|