The reason for the move was primarily based on signal.

In May 2009, it went full power on its digital signal.

"I didn't want to take any chance of someone getting a fix on my signal."

And as second in command I rather like to keep an eye on signals.

A conference call was arranged to be put through on signal.

The rest of you follow one at a time on my signal.

I'll go through the middle, you two follow on my signal or if I open fire.

Hit the water on my signal and stay the hell clear!

Smith pulled into the driveway, and almost as if it were on signal, the people began to leave.

Could the whole roof lift up in one piece, on signal?