Conversion Mbps to Msps

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tagor-muda@hotmail.ocm Member ★★ Offline Posts: 24 Indonesia	Oct 14^th, 2009 at 12:08pm Dear all, how to calculate Out bound 45 Mbps to .... Msps In bound 2 Mbps to ...Msps Assume ; Modulasi In bound 8 PSK, FEC 7/8 Modulasi out bound QPSK, FEC 1/2 Rgds Tagor Muda
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Eric Johnston

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Reply #1 - Oct 14^th, 2009 at 12:59pm

SR = Symbol Rate
DR = Data Rate = the information rate. This is the same as the customer information rate if there is no framing, packet header, supervisory, conditional access or encryption overhead added to the data stream in the modem. �DVB modems and IP packets add significant overheads.
CR = FEC Code Rate. �Eg. 5/16, 21/44, 1/2, 2/3, 3/4, 5/6, 7/8, 188/204, 0.95
m = modulation factor (transmission rate bits per symbol). � BPSK=1, QPSK=2, 8PSK=3, 8QAM =3, 16QAM=4 etc �

Formula: � SR = DR / (m x CR)

Best regards, Eric.

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