L64704 LSI Logic Corporation, L64704 Datasheet - Page 67
L64704
Manufacturer Part Number
L64704
Description
Satellite Decoder Technical Manual 5/97
Manufacturer
LSI Logic Corporation
Datasheet
1.L64704.pdf
(220 pages)
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SSA[1:0]
SST[1:0]
Group 4 Registers
which one of these three synchronization status bits will
be propagated to the SYNC pin.
Synchronization States, Acquisition Mode
The second synchronization module (after the Viterbi
Decoder, before the Deinterleaver module) allows three
different state diagrams to be used in the acquisition
phase. The number of properly identified synchronization
words that will cause “in-synchronization” to be declared
can be configured from 3 to 6. For more information see
Section
Synchronization.”
Synchronization Status, Tracking Mode
The second synchronization module (after the Viterbi
decoder and before the Deinterleaver module) allows two,
three, four, or five undetected synchronization words
before the L64704 declares a loss of sync. For more
information see Section
leaver Synchronization.”
Data
D5
0
0
1
Data
D3
0
0
1
1
Data
D1
0
0
1
1
Bits
D4
0
1
0
Bits
D2
0
1
0
1
Bits
D0
0
1
0
1
6.3, “Reed-Solomon Deinterleaver
SYNC Pin Connected to
Viterbi Decoder Synchronization
DI/RS Decoder Synchronization
Descrambler Synchronization
Number of Sync Words
Found to Acquire
Number of Missed Sync
Words to Loss of Lock
2
3
4
5
3
4
5
6
6.3, “Reed-Solomon Deinter-
[3:2]
[1:0]
3-35
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