Official aerial installers guide to the TV spectrum future
This is an excellent resource if you are involved in an amateur or professional way. It includes the upcoming 700MHz clearance, Radio Equipment Directive (starts June 2016), TV White Space, Local TV as well as Interference mitigation help and details about the future of DTT.
To download go to this DTG page and click "Download" next to "An installers' guide to the future of UHF spectrum (8 October 2015)"
Phil: Is your aerial horizontally polarised (elements pointing side to side) or vertically polarised (elements going up and down)? Rowridge is unusual in that it broadcasts in both polarities, with the commercial multiplexes at much higher power in vertical than horizontal. If your aerial is currently horizontal, rotating it to vertical should significantly improve reception for you. It will also help reduce the amount of co-channel interference you're getting from Crystal Palace, which uses the same frequencies as Rowridge for COM4-6 and is predicted to have a weak signal present at your postcode.
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Tim Austin: The TV is working fine - its telling you you have a problem with your aerial system, and if you look at your manual it will guide you to the most common problems. Classic problem is the cable at the back of the TV has become loose or come out. Check all your cables, and if still no joy, then you might need a professional.
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