| These are transmitters that use radio waves to communicate with mobile phone handsets. |
| The Lorenz beam system for blind landing consisted of two transmitters located on opposite sides of the airstrip runway. |
| They in turn are at the mercy of the power companies for electricity to transmitters and relay stations. |
| As transmitters are switched on and new areas receive BBC digital radio broadcasts the postcode checker on the website will also be updated. |
| More than a dozen eavesdropping and jamming units, telephone exchanges, and radio and television transmitters were attacked. |
| But the controversy centers on radio towers and other transmitters, not car-radio antennae. |
