single-frequency simplex

single-frequency simplex

[′siŋ·gəl ′frē·kwən·sē ′sim‚pleks]
(communications)
Single-frequency carrier communications in which manual rather than automatic switching is used to change over from transmission to reception.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.