Large buildings such as warehouses, hospitals and factories often have no usable signal further than a few metres from the outside walls.

The usable signal usually reaches as far south and southeast as the north and northwestern suburbs of metro Atlanta.

Neither of us can get our routers to produce a usable signal.

Due to the low wattage of its transmitter, any usable signal is not received for the majority of Gainesville residents.

It may increase the contrast of background noise, while decreasing the usable signal.

The station's usable signal previously has been limited in Albuquerque to neighborhoods of higher elevation.

The detector converts the amount of IR reaching it to a usable signal, such as a voltage.

For instance, some hardware random number generators work by amplifying quantum effects into practically usable signals.

A given VR-sensing system has a definite limit as to how slow the target can move and still develop a usable signal.

At higher frequencies, and shorter wavelengths, below 0.7 micrometres, spurious reflections cause such serious scattering that the usable signal is soon lost.