TIP: Not 100 % sure, but it looks like when pinging the signal, you don't need to be exactly in the middle of the circle. Just ping it anywhere inside of the circle and you are fine. It doesn't change the probability of successful ping.
It is important that the value falls within the green circle.
What do you mean by "the value" ?
Sorry for my bad translator. I meant the signal itself should be in the green circle.
