Ubee DDM3521, Руководство пользователя, Страница: 27 / 29

Understanding the Cable Modem Menu Ubee Interactive
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Ubee DDM3521 Cable Modem User Guide • February 2013
4.6 Using the Cable Modem Event Log Option
The Event Log screen displays log information that may be useful to diagnose
operational issues with the device. It also displays all logins to this Web interface.
Steps
To view event log information:
1. Access the Web interface.
2. Click the Modem link from the top menu.
3. Click the Event Log link from the left side of the screen. Field explanations are listed
following screen example.
Label Description
Modulation Type Displays the modulation type as QPSK, 16QAM, 8QAM,
32QAM, 64QAM, 128QAM.
Differential Encoding Displays if differential coding is on or off.
Preamble Length Displays the preamble length 0-1536 (bits).
Preamble Value Offset Displays the preamble value offset 0-1536 (bits).
FEC Error Correction (T) Displays FEC error correction from 0 to 10 (0 implies no FEC.
The number of codeword parity bytes is 2*T).
FEC Codeword Information
Bytes (k) Displays the FEC codeword information. Fixed: 16 to 253
(assuming FEC on). Shortened: 16 to 253 (assuming FEC on).
Maximum Burst Size Displays the maximum burst size: 0-255 (mini-slots).
Guard Time Size Displays the guard time size: 4-255 (symbols).
Last Codeword Length Displays the last codeword length as FIX (fixed) or SHORT
(shortened).
Scrambler on/off Displays if the scrambler is on or off.