DVB-S,DVB-S2,DVB-S2X and DVB-C Bitrates Calculator

Updated 06 March 2018

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3dB Satellite Bandwidth(approx.)

Occupied Satellite bandwidth

Spectral Efficiency

Modulators Nyquist filter rolloff factor
( =0.4 when not known- 0.35 for DVB-S)

DVB-S2 Pilot

DVB system


Symbol Rate

Allocated bandwidth

Symbol Rate        8-PSK 3 bits/symbol MBaud
Allocated 8-PSK bandwidth MHz
DVB-C Symbol Rate    16-QAM 4 bits/symbol MBaud
Allocated 16-QAM bandwidth MHz
DVB-C Symbol Rate    32-QAM 5 bits/symbol MBaud
Allocated 32-QAM bandwidth MHz
DVB-C Symbol Rate DVB-C   64-QAM 6 bits/symbol MBaud
Allocated 64-QAM bandwidth MHz
DVB-C Symbol Rate  128-QAM 7 bits/symbol MBaud
Allocated 128-QAM bandwidth MHz
DVB-C Symbol Rate  256-QAM 8 bits/symbol

Allocated 256-QAM bandwidth MHz
Netto Transport Stream Bitrate

Bitrate with Reed Solomon encoding
Packet length 204 bytes
(DVB-S/C only)

DVB-S & DVB-S2 Brutto Bitrate


For DVB-S2 and DVB-S2X the FECFRAME size is listed in the selection field (68400=normal,16200=short)

Calculation is based on which variable that has changed value.
Put the cursor in another field to trig the OnChange calculations!
By browsing trough different FEC values it is allocated bandwidth/symbolrate that is keept to the same value.

DVB-S/DVB-C ,  ETSI TR 101 290: :

For DVB compliant systems the QAM/QPSK passband spectrum is shaped by root raised cosine filtering with a roll-off 
factor alpha (). Rolloff=0.15 for DVB-C systems. 0.35 for DVB-S systems. 0.20/0.25 or 0.35 for DVB-S2 and 0.05/0.10/0.15 for DVB-S2X. For an ideal QAM/QPSK system this means 
that all the RF/IF power will lie in the frequency bandwidth:
Allocated bandwidth = Symbolrate*(1+alpha() )

Roll off as specified by Intelsat:

Intelsat Earth Station Standard 420: (IESS420e.PDF): 
Allocated Bandwidth= (1+Nyquist rolloff factor)*Symbolrate
Nyquist rolloff factor =0,4 used when rolloff factor is unknown.

Note: 1Mbit/s = 1 000 000 bit/s

   2014 Jens T. Satre