Jamming range
Jamming range was an area in which one could be affected by a jamming signal. 

In 2152, T'Pol reported that a  she, Jonathan Archer, and Soval were travelling in was still within jamming range of the Andorians. ()

In 2285, James T. Kirk ordered Spock that if he didn't hear from the landing party on Regula I, to fix the  as much as possible, head for the nearest starbase, and contact Starfleet Command the moment the starship was out of jamming range. ()

Communication
Measurements