Conducted Measurements to Quantify DVB-T Interference into DTT Receivers

No part of this document may be copied or otherwise reproduced without the prior written permission of ERA Technology Limited. If received electronically, recipient is permitted to make such copies as are necessary to: view the document on a computer system; comply with a reasonable corporate computer data protection and backup policy and produce one paper copy for personal use. If no restrictive markings are shown, the document may be distributed freely in whole, without alteration, subject to Copyright. Summary In December 2006 ERA Technology Ltd undertook a measurement programme on behalf of Ofcom to quantify 3G and WiMAX mobile interference into DVB-T receivers [2]. Following on from this work, additional measurements have been undertaken to enable Ofcom to gain a fuller picture of the performance of a large range of digital terrestrial television (DTT) receivers that are available in the UK market, and the likely performance of these receivers against digital video broadcast – terrestrial (DVB-T) interference. A total of fifteen DTT receivers were tested to determine their required carrier-to-interference (C/I) protection ratios in the presence of DVB-T interference for a range of channel separations from N-11 to N+11 channels away. DVB-T interference into fifteen DTT receivers The test results for the measured C/I protection ratios for DVB-T interference into fifteen DTT receivers showed that: • Receivers 1, 3 and 4 were considered as having the worst performance.