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digital modulation

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digital modulation

The altering of a carrier by a digital signal. See modulation and carrier.


digital modulation [′dij·əd·əl ‚mäj·ə′lā·shən]
(communications)
A method of placing digital traffic on a microwave system without use of modems, by transmitting the information in the form of discrete phase or frequency states determined by the digital signal.


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QAM uses satellite signals that have been converted from QPSK/L-Band satellite signals; a digital modulation standard used by the cable television industry.
In addition to using AMC-18 for carriage of the HDTV networks offered through HITS Quantum, the CMC relies on SES AMERICOM's 50-state AMC-4 satellite to deliver a high capacity service that operates at 256 QAM digital modulation.
249), for both digital modulation (DTS) and frequency hopping systems.
 
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