
The vests are detecting
a strong SIGNAL amassing
on the lower levels.
Westworld Season 2, Episode 7

And when we give the SIGNAL,
bring us back down.
Game of Thrones Season 4, Episode 9

When they see us coming,
that fire becomes a SIGNAL.
Game of Thrones Season 2, Episode 5

-perhaps we could come up with a SIGNAL!
-(DOOR SLAMS)
The Big Bang Theory Season 10, Episode 16

The SIGNAL is out of range.
Money Heist Season 3, Episode 8