Motorola OM 2000 Installation & Operation Manual page 79

Out of band modulator
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GLOSSARY
Quadrature Phase Shift Keying (QPSK)
A digital modulation method that combines two carriers that are 90 degrees out of
phase (in quadrature), resulting in four possible phase states.
Reed-Solomon encoder
A block-based encoding technique used for forward error correction.
User Datagram Protocol (UDP)
A transmission protocol that uses an IP address to identify the destination host and
a port number to identify the destination application.
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