If your radio and TV reception is affected by amateur and citizen band (CB) operators you can take a number of steps to fix the problem.
Generally this interference will happen because:
In some cases, deficiencies in Amateur or CB transmitter systems can cause interference to radio and TV reception.
First identify whether the reception problems are due to:
The ACMA publication Better television and radio reception advises on the reception of analog TV and interference by Amateur and CB radio.
Identifying the source of disturbance to digital TV reception is more difficult. A TV antenna installer is able to diagnose reception problems.
Resolving the reception problem
Radio and TV interference involving Amateur and CB radio is a shared matter for:
In most cases, those involved need assistance from service professionals to resolve the matter.
You may need to consult a TV antenna supplier or antenna installer to choose a signal filter for your situation.
Operators whose transmitters are involved in an interference problem are encouraged to work with people affected by the interference to resolve the issue.
The ACMA may take appropriate regulatory action if a person causes substantial interference with radiocommunications.
The effect from Amateur and CB radio signals may be eliminated or minimised by:
ensuring the standard of the receiving installation provides adequate reception in the area
ensuring a suitably installed and maintained outdoor antenna and antenna cabling is used
ensuring masthead and distribution amplifiers, where used, are fitted with filters designed to reject unwanted signals
locating the outdoor antenna as far away as possible from the antenna of the Amateur or CB transmitter
fitting of appropriate interference filtering devices to the affected equipment
putting filters between the antenna and the television receiver or digital set-top box
putting filters in the electricity mains lead.
The operator of the Amateur or CB station involved can provide advice about their frequencies of operation when selecting an appropriate filter.
Warning: Under no circumstances should you attempt to repair or modify any electrical device unless you are qualified to do so.
Amateur or CB transmitter operators
Operators of Amateur or CB transmitters may be able to minimise the potential for interference by:
increasing the physical separation between the transmitting antenna and TV or radio receiver antenna and cabling
installing an effective earth or ground plane for the antenna
installing the transmitting antenna away from metal structures such as roofing, gutters and downpipes
using a balun transformer, common mode choke and ferrite beads on the antenna cable
running antenna cables down from vertical antennas and at right angles away from horizontal antennas
employing additional radio frequency filters appropriate for the frequencies of operation
using a different transmitting antenna type, location, and orientation
reducing the transmitter's output power—only use the power level that is necessary and not maximum power
selecting a frequency of operation compatible with broadcasting stations in the area—avoid the impact of harmonic related emissions
properly matching the transmitter to the antenna
using a low impedance radio frequency earth connection for the transmitter and associated equipmentusing transmitters other than during prime viewing or listening times.