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Ubee Interactive 2011
26
A.3 MODEM
C
ABLE
M
ODEM
:
D
OWNSTREAM
Label
Description
Frequency
Displays the downstream channel frequency on which the
cable modem is scanning.
Lock Status
Displays if the cable modem succeeded in locking to a
downstream channel.
Channel ID
Displays the downstream channel ID.
Modulation
Displays the modulation method that’s required for the
downstream channel to lock on to by the cable modem.
This method is determined by the service provider.
Symbol Rate
Displays the symbol rate. The current cable modem
downstream symbol rates are: QAM64 is 5056941
sym/sec, QAM256 is 5360537 sym/sec.
Interleave
Depth
Displays the current cable modem downstream Interleave
depth (4/8/16/32/64/128/other).
Power Level
Displays the receiver power level after ranging process.
RxMER
The Receiver Modulation Error Ratio is used to quantify
the performance of a digital radio receiver in a
communications system using digital modulation.
Correctable
Codewords
Displays the quantity of codewords which are correctable.
Uncorrectable
Codewords
Displays the quantity of codewords which are not
correctable.