QRM-Interplanetary

Published by United States: Street & Smith Publications, Incorporated, 1942..

QRM—International code signal meaning "Interference" of controllable nature, such as man-made static, cross modulation from another channel adjoining or willful obliteration of signals by an interfering source.

Interference not of natural sources (designated by International code as QRN), such as electrical storms, common static, et cetera.

—Handbook, Interplanetary Amateur Radio League.

1 edition