SI2107 SILABS [Silicon Laboratories], SI2107 Datasheet - Page 62
SI2107
Manufacturer Part Number
SI2107
Description
SATELLITE RECEIVER FOR DVB-S/DSS
Manufacturer
SILABS [Silicon Laboratories]
Datasheet
1.SI2107.pdf
(80 pages)
- Current page: 62 of 80
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Si2107/08/09/10
Register A0h. Viterbi Search Control 1
Register A2h. Viterbi Search Control 2
62
Name
Name
Bit
Bit
1:0
Bit
7:6
5:0
Bit
3
2
D7
D7
0
VTCS[5:0]
Reserved
VTERW[1:0]
Name
VTERM
VTERS
Name
D6
Reserved
D6
0
D5
Program to zero.
Viterbi Code Rate Search Parameter Enable.
The code rates to be used in the Viterbi search are selected by writing a
one into the appropriate bit position. The list below illustrates the rela-
tionship between bit position and code rate.
Bit 5 = 7/8 code rate (MSB)
Bit 4 = 6/7 code rate
Bit 3 = 5/6 code rate
Bit 2 = 3/4 code rate
Bit 1 = 2/3 code rate
Bit 0 = 1/2 code rate (LSB)
Default: All code rates selected (3Fh).
D5
D4
Viterbi BER Measurement Start
Writing a 1 to this bit initiates the Viterbi BER measurement.
Viterbi BER Measurement Mode
0 = finite window (default)
1 = infinite window
Viterbi BER Measurement Window
00 = 2
01 = 2
10 = 2
11 = 2
Preliminary Rev. 0.7
25
13
17
21
bits
bits (default)
bits
bits
D4
VTERS
D3
D3
VTCS[5:0]
Function
Function
VTERM
D2
D2
D1
D1
VTERW[1:0]
D0
D0
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