Quantum and Evolution Series Installation and Operating Handbook
8-31
When you look at BER performance figures at a
specified
E
b
/N
o
you get the same BER
performance whether the data is framed or not. Adding framing to a Closed Network link
would increase the bandwidth, decrease the Carrier/Noise, decrease the displayed E
b
/N
o
(as it does not compensate for framing) and therefore degrade the BER. However when
brought back to the same E
b
/N
o
you do of course recover the same BER. Framing
therefore does not degrade the BER for a stated E
b
/N
o
, but it does require more power
(and bandwidth) to achieve the same E
b
/N
o
.