User's Guide

Table Of Contents
200
Spread Spectrum Spread spectrum spreads the transmission over different frequencies within its assigned
bands. There are four variations of spread spectrum technology, but for internetwork-
ing purposes Direct Sequence Spread Spectrum (DSSS) with DPSK is the one most
frequently used. DSSS continuously distributes the signal across a portion of the fre-
quency band. DSSS resists interference from other RF signals, static from nearby elec-
tronic devices, and fading. DSSS is also highly secure because the signal appears as
noise to non-DSSS receivers or DSSS receivers that are set to process a different spec-
trum.