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Datum Systems PSM-500L Manual de usuario Pagina 13

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Datum Systems PSM-500, 500H & 500L VSAT/SCPC Modem Specification
Rev. 0.86
A-13
Turbo Product Codes Performance
The typical performance with the optional Turbo Product Codes FEC is shown in the tables below.
The Eb/No values shown are those referenced to the customer data rate at the decoder output.
Performance would appear improved if measured relative to the decoder input (i.e. at the satellite
data rate). All values shown are using the synchronous TPC scrambler.
TPC M5 Compatible Modes
Turbo Product Codes FEC M5 Full Mode Typical
Performance Data
Rate ½ Rate ¾ Rate 7/8
MTOCR 14100 14110 14120
BER Eb/No Eb/No Eb/No
10
-4
10
-5
2.20 3.00 4.80
10
-6
2.50 3.23 5.12
10
-7
2.80 3.50 5.50
10
-8
3.09 3.84 5.88
10
-9
3.40 4.15 6.31
10
-10
3.70 4.50 6.80
Turbo Product Codes FEC M5 Short Block Mode
Typical Performance Data
Rate ½ Rate ¾ Rate 7/8
MTOCR 14200 14210 14220
BER Eb/No Eb/No Eb/No
10
-4
10
-5
3.90 5.20
10
-6
4.07 5.58
10
-7
4.30 6.00
10
-8
4.56 6.47
10
-9
4.87 6.91
10
-10
5.20 7.30
Turbo Product Codes FEC M5 Legacy Mode
Typical Performance Data
Rate ½ Rate ¾ Rate 7/8
MTOCR 14300 14310 14320
BER Eb/No Eb/No Eb/No
10
-4
10
-5
3.2 dB 4.6 dB
10
-6
3.3 dB 4.7 dB
10
-7
3.5 dB 4.8 dB
10
-8
3.6 dB 5.0 dB
10
-9
3.7 dB 5.3 dB
10
-10
3.9 dB 5.5 dB
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