L64724 LSI Logic Corporation, L64724 Datasheet - Page 252

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

B-38
Group 4, APR 38–40 – set to 0x006D39.
The value for CAR_LF_INIT[23:0] is in accordance with
Equation B.52
Assuming an initial carrier frequency deviation of + .1 MHz is required,
the value for CAR_LF_INIT[23:0] is given as shown in
Equation B.53
Set Group 4, APR 40 to 0x00, APR 39 to 0x6D, and APR 38 to 0x39.
Group 4, APR 41 – Set to 0x65.
Set the bits in the Carrier Loop Configuration register as shown in
Table
Table B.9
If the carrier is locked but the constellation is rotated by 45 degrees,
reverse the polarity of bit 6 (
L64724 Application Notes
Bits
D7
D6
D5
D4
D3
D2
D1
D0
CAR_LF_INIT
CAR_LF_INIT
B.9.
Setting
0
1
1
0
0
1
0
1
Carrier Loop Configuration Register Bits
CAR_ERROR_SWAP Carrier phase error detector output
=
=
CAR_SWP_SWAP
CAR_AUTO_SWP
CAR_PED_SEL
2
---------------------------------------------------- -
2
-------------------------------------- -
2
37
37
13
CAR_OPEN
Acronym
Reserved
Reserved
CAR_SW
freqdeviation
0.1 10
2
60 10
13
CAR_ERROR_SWAP
Fs
6
6
=
27961
Meaning
Not significant when auto sweep is on
inverted
Carrier auto sweep on
–
–
Choose NDAML phase error detector
Carrier loop operates normally
Carrier sweep on
(0x6D39)
).
Equation
Equation
B.53.
B.52.