Comtech EF Data CMR-5975 Manual - Manual (Page 119)

F–1
Appendix F. DVB-S/S2 BER
Performance at Quasi-Error Free
(QEF)
The Forward Error Correction (FEC) technique used in Digicast receivers complies with ETSI
EN 300 421 for DVB-S and ETSI EN 302 307 for DVB-S2. The information provided below
demonstrates the Es/No to provide "Quasi Error Free" (QEF) performance for a packet error rate
PER of 10
-7 . A PER of 10 -7 corresponds to an approximate BER in the order of 3 x 10 -10 .
Test Configuration: Assumptions:
Symbol Rate: 20 Msps QEF = 10
‐7
PER
Frame Size = 64,800 (Normal Frames) Es/No = C/N
Pilots: Off
Roll Off: 35%
Nominal Input Power: -48 dB
L-Band Frequency: 1,170 MHz
Input Range: -25 to -50 dBm
Recorded Data DVB-S:
Type Modulation FEC Es/No dB
DVB-S QPSK 1/2 2.92
DVB-S QPSK 2/3 4.67
DVB-S QPSK 3/4 5.76
DVB-S QPSK 5/6 6.73
DVB-S QPSK 7/8 7.49