21. The 21st century has seen a move to 2.4 gigahertz spread spectrum RC control systems. 22. Spread spectrum technology increases the phone's clarity and range.23. Sony takes cordless telephone use further with the introduction of its spread spectrum series of phones. 24. Spektrum is the original application of 2.4 GHz spread spectrum radio systems to radio control models. 25. RPMA is a technology communication system employing direct-sequence spread spectrum ( DSSS ) with multiple access. 26. It's basically just spread spectrum for IP networks. 27. The new 2.4-gigahertz phones are all spread spectrum . 28. Other later-generation systems still used frequency-hopping spread spectrum ( FHSS ) technology, but at higher bandwidth. 29. The radios use direct-sequence spread spectrum coding, which is managed by the digital stream into the modulator. 30. By using scrambling technology-- although not as sophisticated as digital spread spectrum -- they block out most eavesdroppers.
