Using The Cable Modem Event Log Option; Steps; Access The Web Interface - Ubee DDM3521 User Manual

Understanding the Cable Modem Menu
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.
24
Label
Modulation Type
Differential Encoding
Preamble Length
Preamble Value Offset
FEC Error Correction (T)
FEC Codeword Information
Bytes (k)
Maximum Burst Size
Guard Time Size
Last Codeword Length
Scrambler on/off
Description
Displays the modulation type as QPSK, 16QAM, 8QAM,
32QAM, 64QAM, 128QAM.
Displays if differential coding is on or off.
Displays the preamble length 0-1536 (bits).
Displays the preamble value offset 0-1536 (bits).
Displays FEC error correction from 0 to 10 (0 implies no FEC.
The number of codeword parity bytes is 2*T).
Displays the FEC codeword information. Fixed: 16 to 253
(assuming FEC on). Shortened: 16 to 253 (assuming FEC on).
Displays the maximum burst size: 0-255 (mini-slots).
Displays the guard time size: 4-255 (symbols).
Displays the last codeword length as FIX (fixed) or SHORT
(shortened).
Displays if the scrambler is on or off.
Ubee DDM3521 Cable Modem User Guide • February 2013
Ubee Interactive