Better television and radio reception - Identifying your analog TV and radio interference problem

Better television and radio reception Identifying your analog TV and radio interference problem communicating | facilitating | regulating Canberra Purple Building Benjamin Offices Chan Street Belconnen ACT PO Box 78 Belconnen ACT 2616 T +61 2 6219 5555 F +61 2 6219 5353 Melbourne Level 44 Melbourne Central Tower 360 Elizabeth Street Melbourne VIC PO Box 13112 Law Courts Melbourne VIC 8010 T +61 3 9963 6800 F +61 3 9963 6899 TTY 03 9963 6948 Sydney Level 15 Tower 1 Darling Park 201 Sussex Street Sydney NSW PO Box Q500 Queen Victoria Building Sydney NSW 1230 T +61 2 9334 7700 1800 226 667 F +61 2 9334 7799 © Commonwealth of Australia 2010 ISBN 0642 78339 X This work is copyright. Apart from any use as permitted under the Copyright Act 1968, no part may be produced by any process without prior written permission from the Australian Communications and Media Authority. Requests and enquiries concerning reproduction and rights should be addressed to: Manager Communications and Publishing Australian Communications and Media Authority PO Box 13112 Law Courts Melbourne VIC 8010 The Australian Communications and Media Authority wishes to thank the Australian Broadcasting Corporation and Special Broadcasting Service for their assistance in compiling this booklet. The images and descriptions in this booklet identify only generic forms of interference to television and radio broadcasts and should not be associated with any particular television network, radio station or other organisation. No liability is or will be accepted by the Minister for Broadband, Communications and the Digital Economy, the Australian Communications and Media Authority, the Commonwealth of Australia, or its officers, servants, or agents for any loss suffered, whether arising directly or indirectly, due to the accuracy or contents of this booklet. Published by the Australian Communications and Media Authority Better television and radio reception Identifying your analog TV and radio interference problem Contents Important advice before you start 1 Getting started 1 Choosing a technician 1 Analog television reception 2 Reception problems 2 Ghosting 2 Weak signal 2 Co-channel interference 3 Radiofrequency interference 3 AM broadcast transmitter interference 4 FM broadcast transmitter interference 4 Two-way radio interference 4 Masthead amplifier interference 5 Power supply interference 6 Computer equipment interference 7 Electrical interference 7 Power line interference 7 Street lighting interference 8 Electrical appliance interference 8 Domestic equipment and appliances that can cause electrical appliance interference 8 Thermostat interference 8 Electric motor interference 9 Interference from digital television transmission 9 Digital television transmission interference 9 Antennas and masthead distribution amplifiers 10 Choosing the correct antenna 10 Installing a television antenna 10 Ancillary equipment for television antenna systems 11 Antenna availability: Channel groups 11 Polarisation 12 Major antenna characteristics 12 Pointing the television antenna in the correct direction 12 Correct antenna direction 12 Commonly used terms 13 Masthead and distribution amplifiers 13 Amplifier malfunction 14 Amplifier overload 14 acma | iii ... - tailieumienphi.vn