"I'm afraid we may have gotten our signals crossed," answered the man in the pin-striped suit.

I got your signals crossed and thought you wanted to be rushed into an affair.

I was afraid Pete had gotten his signals crossed.

If the signal crosses a discontinuity point then the model is no longer valid for linear analysis purposes.

Some companies have even gotten their geographic signals crossed.

Gus lives by signals, and every now and then gets his signals crossed.

She may have planned a tryst with him for later that evening, but someone had gotten his signals crossed.

And, just so you don't get your signals crossed again, that's an order!

He responded that they probably got their signals crossed and suggested they meet again.

The reason for using approximation signs is that, in the discrete case, the signal may cross the threshold between samples.