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QMultiFlex-400™ Installation and Operating Handbook
Chapter 12
Specification Summary
12.1 QMultiFlex-400™ Specifications
See current QMultiFlex-400™ P2MP Satellite Modem Datasheet on the ParadiseData.com
website.
12.2 FEC BER/PER Performance
Teledyne Paradise Datacom has standardised on QEF tables rather than BER curves. This
reflects the fact that DVBS2 & DVBS2X has very steep curves, which makes operating at
a certain point almost impossible. Therefore, the difference between the performance
stated in this section and true QEF points (where there are effectively no errors) can be as
little as 0.1 or 0.2dB. This level of discrimination is extremely hard to measure without a
complex test set up and a great deal of care. Preferably it is best to ensure the Satellite
links stay on the working side of the QEF point in all conditions. The following tables show
the theoretical QEF points in Es/No and Eb/No.
Note: A packet is defined as 188 bytes x 8 bits. BER figures can be calculated from PER
my dividing PER by 1504 i.e. A PER of 10e-7 is equivalent to a BER of 6.65e-11.
12-1
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