Cassandra scrambler

The Cassandra scrambler is a terran-devised device. It can fill radio channels with powerful white noise, preventing communication unless a sufficiently powerful transmitter is used to cut through the static.

A gun cutter's transmitters are capable of cutting through the noise.ref name="SC:IMengsk">McNeill, Graham (December 30, 2008). StarCraft: I, Mengsk. Simon & Schuster (Pocket Star). ISBN 1416-55083-6.