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06-10-2009, 10:23 AM
| #1 (permalink) |
| Administrator  Join Date: Aug 2008 Posts: 249
|  DIY: How to Install a TV Aerial Installing a TV Aerial Note that you are not likely to get a good reception if you live more than 20 miles from a UHF TV transmitter, and the local terrain like the presence of trees or a blocking building, can affect reception too. If you are installing an indoor antenna, check to see if you have metal foil roof materials, these generally gives you poor reception! Water tanks blocking the path of the TV transmitter follows the same principles. First off, you should ask your neighbours who have aerials if they get a good reception. If they do not, then consider getting an external aerial, or install high enough to get a better reception. The general rule is to install your aerial as high as possible. Also, the type of aerial may provide you with better reception. For instance, in some places, indoor aerials might do the trick, while for some external aerials are needed for decent reception. In some areas where reception is so bad, you may need a high-gain aerial if you have poor reception in your area. Check TV Aerial Compass Bearing Get the bearing to your TV transmitter by visiting the Wolfbane TV reception predictors and the Freeview coverage maps in your area. You should also know whether the TV transmitter in your area uses vertical or horizontal polarization. These are the sites to visit: http://www.wolfbane.com/cgi-bin/tva.exe (Analogue TV reception prediction) http://www.wolfbane.com/cgi-bin/tvd.exe (Freeview reception prediction) http://www.dtg.org.uk/retailer/transmitters.html (Full list of UK TV transmitters, with details on the aerial group you need for best reception) Using a compass, find the TV transmitter bearing from your house. Move around the aerial to find the best picture on all channels while holding it in the direction of the transmitter. Next, you take coaxial cables to carry the signals down from the aerial to outlets close to the TV. Double-screened cable suffers less interference than other types of cables. Run a downlead from the aerial to the outlet, to plug in a short coaxial lead and to connect this to the TV set. Fit a connector to the end of a coaxial cable by slitting the outer covering lengthwise and then peeling it back. Cut off around 50mm at the end. Undo the connector, and then slip the screw cap onto the cable. Pull back the screening wires. Cut off 25mm of the insulation to expose the inner copper wire and push the wire into the hole in the other half of the connector. Push up the screw cap and screw the two parts together. Once you determine the best reception with your TV aerial, you can now mount the aerial securely. If you are installing an external aerial, you may need to screw the aerial’s bracket to a wall using metal expansion anchors. If you are using a pole, you’d need special clamps to keep them in place. Connect one end of the coaxial cable to the aerial terminals found inside the insulator cap on the aerial’s body. Each aerial will have wiring instructions you would need to follow. |
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