L64704 LSI Logic Corporation, L64704 Datasheet - Page 129

• Manufacturer Part Number: L64704
• Description: Satellite Decoder Technical Manual 5/97
• Manufacturer: LSI Logic Corporation

Figure 5.13
Eye Pattern and
Soft Decision
Thresholds
Equation 5.13
The useful part of the matched filter output signal is clipped for a larger
value of SCALE.
Because the power control loop automatically reduces the eye amplitude
for increasing noise, the DEMI and DEMQ signals include additional
headroom for resolving noise.
Equation 5.13
Output Control
SCALE
0
2 PWR_REF
relates SCALE and PWR_REF.
=
2047
111
110
010
101
100
011
001
000
010
001
000
111
110
101
100
011
5-25