Ubee Interactive
4.1.5 Modem - Upstream Burst
DDW2600 Wireless & DDC2700 Commercial Cable Modem/Router Subscriber User Guide • May, 2010
23
4.1.5
Modem - Upstream Burst
This section explains how to use the
Upstream Burst
screen of the web interface.
The
Upstream Burst
screen displays detailed information on the device’s upstream
data flow to the service provider.
1. Access the web interface. Refer to
page 14
, if needed.
2. Click the
Modem
link from the top menu and then the
Upstream Burst
link from
the left side of the screen. Field explanations are listed below the following screen
example.
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