As a Marine serving in the Korean and Vietnam wars, John Hopkins used line-of-sight and various portable radios, or PRCs, to communicate in the field. The “AN” in the AN/PRC-6 meant that it was a ...

DURANT, Okla. (KTEN)—The Durant Police Department and Durant Fire Rescue made the switch from analog radios to digital radios Tuesday morning.

The distinction between analog and digital signals is very simple, but it can still be a challenge to wrap one's mind around the concepts that define the two systems. Just when you think you've got it ...

The use of high-voltage power lines to carry voice signals has a history dating back to the early 1920s, with lowfrequency amplitude-modulation systems operating over lines with voltages as high as ...