Digital Television Antenna reception

January 19, 2023
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Indoor TV antennas are susceptible to interference in strong winds.High winds can play havoc with digital-television reception whether you have an outdoor TV antenna or an indoor attic-mounted or set-top antenna. While an outdoor antenna is vulnerable to direct movement by wind, particularly if it is fixed to a tall mast, the problem for indoor antennas is usually multi-path interference caused by nearby trees swaying in the wind. In this situation you will need to re-site the antenna or get rid of the tree to stabilize your digital-television reception.

'Line of Sight' TV Reception

For optimal digital-television reception, antennas need a clear line of sight toward the TV broadcast tower. Any large structure along this line of sight, such as buildings or a nearby tree, can cause signal drop-outs. Buildings don't move enough in the wind to affect the signal strength received by an outdoor or indoor television antenna, but a tree that doesn't usually affect your TV reception may disrupt the signal as it moves and sways in high winds.

Multi-Path Interference

A tree located in front of your television antenna can cause a reception problem known as short delay multi-path interference. Signals from the TV broadcast tower overlap chaotically behind the tree and this causes drop-outs on certain TV channels when the wind blows and moves the tree. The problem is usually confined to higher-frequency UHF digital-television channels. In weaker signal areas, multi-path interference can lead to the complete loss of your digital-television signal on UHF channels.

Indoor and Outdoor Antennas

Short delay multi-path interference can affect both indoor and outdoor antennas, but the problem is often worse with an indoor antenna because it typically receives a weaker signal than an exterior antenna. Indoor set-top antennas are usually only recommended for use in strong signal areas close to TV broadcast towers. An attic-mounted antenna will often deliver better results than a portable antenna, but an outdoor antenna is often essential for weak signal areas or reliable long-range digital-television reception.


To troubleshoot multi-path interference problems, move the antenna to another position or cut down the tree. If you can't or don't want to cut down the tree because it's on a neighboring property, your troubleshooting choices are restricted to the antenna. If you use an indoor set-top antenna, try moving it to another position in the room to maximize reception in windy conditions. Alternatively, consider upgrading to an attic-mounted antenna or an exterior antenna on a roof or gable-end. Install the antenna as far away from the tree as possible to minimize the effects of multi-path interference in windy conditions. If the interference occurs on VHF channels, a larger antenna can sometimes fix the problem.

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