Calculation of the field strength of an interfering signal to produce 3dB reduction of 46 dB4W s/n ratio for 15 kHz AF bandwidth FM link
The aim of this Tech. Mem. is to produce an expression for the field strength of an interfering signal which provides a 3 dB loss of signal to noise ratio in an FM channel delivering 46 dB4W in the absence of interference. The FM channel is taken as having 75 kHz peak programme deviation and 15 kHz audio bandwidth. The receiver aerial is assumed to be a half wavelength dipole for the purpose of the calculation.
White Paper copyright
© BBC. All rights reserved. Except as provided below, no part of a White Paper may be reproduced in any material form (including photocopying or storing it in any medium by electronic means) without the prior written permission of BBC Research except in accordance with the provisions of the (UK) Copyright, Designs and Patents Act 1988.
The BBC grants permission to individuals and organisations to make copies of any White Paper as a complete document (including the copyright notice) for their own internal use. No copies may be published, distributed or made available to third parties whether by paper, electronic or other means without the BBC's prior written permission.