What can a radio's signal characteristics reveal?

Can the parameters of a signal reveal information about the radio and unit using it?

Yes. Radio characteristics can help identify equipment and connect it with the unit using it.

A viewer points out that the characteristics of a signal can reveal information about the radio sending it. The response agrees and connects equipment identification with recognizing the unit using it. Those clues add to the information available from traffic patterns. They remain part of a wider intelligence picture that also benefits from reading the messages.