In electronics and telecommunications a transmitter or radio transmitter is an electronic device which produces radio waves with an antenna. The transmitter itself generates a radio frequency alternating current, which is applied to the antenna.What does signaling device mean?
1. signaling device - a device used to send signals bell - a hollow device made of metal that makes a ringing sound when struck buzzer - a signaling device that makes a buzzing soundWhat is signal preemption device?
"Signal preemption device" means a device that is capable of altering the normal operation of a traffic control signal.What uses a digital signal?
Analog and digital signals are used to transmit information, usually through electric signals. In both these technologies, the information, such as any audio or video, is transformed into electric signals.