Ambit Wireless USB Adapter Guida Utente Pagina 31

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Ambit Broadband
Users Guide 31
7.1.5 Upstream Burst
Label
Description
Modulation Type
QPSK/16QAM.
Differential Encoding
On/Off
Preamble Length
0-1024 (bits).
Preamble Value Offset
0-1022 (bits).
FEC Error Correction (T)
0 to 10 (0 implies no FEC. The number of codeword parity bytes is 2*T)
FEC Codeword Information Bytes (k)
Fixed: 16 to 253 (assuming FEC on). Shortened: 16 to 253 (assuming
FEC on)
Scrambler Seed
15 bits (Not used if scrambler is off)
Maximum Burst Size
0-255 (mini-slots)
Guard Time Size
4-255 (symbols)
Last Codeword Length
Fixed/shortened
Scrambler on/off
On/Off
7.1.6 Operation Configuration
This page shows the running configuration of cable modem.
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