The chief wouldn't allow random signals and strange energy feeds in his station.

The original Transport Tycoon allows only bi-directional signals, which allow trains to pass in either direction.

From 1981 new cable companies were allowed in areas without "off-air"/spillover signals.

It allowed discrete signals to be sent to six speakers surrounding the listening area, in a theater or at home, for a fuller effect.

The short wires greatly reduce inductance, allowing higher-speed signals, and also conduct heat better.

The exercise may be reactivating these fibers, allowing signals to pass between body and brain.

"The front wheel must be before the stop bar, the car must be traveling at a certain speed, and we do not allow short yellow signals."

Filters are devices used to allow signals at some frequencies to pass (the passband) and reject others (the stopband).

Filters in electronics are used to allow signals of a certain band of frequencies to pass while blocking others.

This "froze" the signal on the screen, allowing signals from different ground stations to be seen and measured.