At the first suspicious noise she was to hold the key down for a single long signal.

This was of course a cross-sectional representation of a single signal.

I recognized a telephone apparatus, and not a single signal came through.

His only job was to send his single electronic signal when the two were in the same room.

The robot may be able to trace her from even a single signal.

However this time it was not a full message but only a single signal.

It was a single signal, simply modulated and compressed to a few nanoseconds.

A mixer stage combines the six output signals from the delay line into a single signal.

We are not dealing with a single detected signal, where the problem might be one of resolving ambiguities.

In a matter of days, not a single intelligible signal went in or out.