L64724 LSI Logic Corporation, L64724 Datasheet - Page 88

• Manufacturer Part Number: L64724
• Description: Satellite Receiver
• Manufacturer: LSI Logic Corporation

3.6.24 Scale Factor for DEMI and DEMQ Outputs (Group 4: APR 26)
3.6.25 SNR Estimator Threshold (Group 4: APR 27)
3.6.26 Carrier Loop Filter Parameters (Group 4: APR 28)
3-58
Read/Write: R/W
Program the SCALE[7:0] bits to set the scale factor for the DEMI and
DEMQ outputs from the Demodulator to the FEC decoder. For the
relationship between SCALE[7:0] and PWR_REF[7:0], see
“Output Control,” page 5-22.
Read/Write: R/W
Use this register to set the value that the phase detector’s signal to noise
ratio (SNR) comparator uses as a threshold when deciding which gain
value to use. For details, see
Tracking,” page
Read/Write: R/W
CAR_LAMBDA_SEL[3:0]
L64724 Registers
APR
APR
APR
26
27
28
D7
D7
D7
CAR_LAMBDA_SEL[3:0]
Carrier Loop Lambda
Program the CAR_LAMBDA_SEL[3:0] field with values
that set the parameters of the carrier recovery loop. For
details, see
page 5-17.
5-16. SNR_THS[7:0] is an unsigned number.
Section 5.7.2.2, “Loop Characteristics,”
SCALE[7:0] is a positive, unsigned number.
Figure 5.7
SNR_THS[7:0]
D4
SCALE[7:0]
in
D3
Section 5.7.2, “Carrier Phase
CAR_MU_SEL[3:0]
Section 5.9,
D0
D0
D0
[7:4]