pulse-coded scanning beam
pulse-coded scanning beam[′pəls ¦kōd·əd ′skan·iŋ ‚bēm]
A radio or radar beam which is swept over a sector of space and is accompanied by a repeated pattern of pulses that is varied to indicate the position of the beam in space.
A system of ground equipment that generates such beams at microwave frequencies to furnish guidance to aircraft making microwave landings. Abbreviated PCSB.