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https://www.satsig.net/cgi-bin/yabb/YaBB.pl VSAT technology and installation >> iDirect Forum: hubs and terminals >> Symbol Rate Calculation https://www.satsig.net/cgi-bin/yabb/YaBB.pl?num=1283940741 Message started by tonge11 on Sep 8^th, 2010 at 11:12am

Title: Symbol Rate Calculation
Post by tonge11 on Sep 8^th, 2010 at 11:12am

Hello

Can anyone help me out in finding how to calculate symbol rate from data rate in iDirect. Also can anyone share details on how to work with iNPT

Regards
Tonge11

Title: Re: Symbol Rate Calculation
Post by zizo9227 on Sep 13^th, 2010 at 8:29am

Symbol rate= data rate/FEC rate/ modulation spectral efficiency

�exp:

If your link is 2MB and using 3/4 TPC and QPSK modulation, your symbol rate will be

� � symbol rate=2048/(3/4)/2= 1365.33 ksps

The bandwidth (kHz) required on satellite will be equal to the symbol rate times spacing (1.4 or 1.3)