Pulse Amplitude Modulation?

Answer

Pulse amplitude modulation is a form of signal modulation in which the message information is encoded in the amplitude of a series of signal pulses. It is used in Ethernet communication. There are two types: single polarity and double polarity.
Q&A Related to "Pulse Amplitude Modulation?"
The PAM are of two types : Double-polarity PAM and Single - polarity PAM.
http://wiki.answers.com/Q/What_are_the_types_of_Pu...
Pulse amplitude modulation (PAM) is the transmission of data by varying the amplitude s ( voltage or power levels) of the individual pulses in a regularly timed sequence of electrical
http://whatis.techtarget.com/definition/pulse-ampl...
( ¦yü·nə·də′rek·shən·əl ¦pəls ¦am·plə′tüd ′mäj·ə
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This link should help u. http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADD005920.
http://answers.yahoo.com/question/index?qid=201003...
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