ZyXEL Communications P-2900-4HB User Manual
Page 35
Chapter 3 Status
P-2900-4HB User’s Guide
35
Lock Status
This indicates whether ZyXEL Device has found a downstream channel.
The ZyXEL Device is either Locked or Not Locked on to the channel
advertised by the CMTS.
Modulation
This is the method used to encode transmission information, similar to
FM or AM on your radio.
The ZyXEL Device supports 256 QAM or 64 QAM (Quadrature
Amplitude Modulation) for the downstream channel.
Downstream
Frequency
This is a standard channel frequency (in hertz) from the DOCSIS 2.0
specification.
Downstream
Power
The is the power level in decibels/mili-volt (dbmV). This value is set by
the CMTS.
SNR
The SNR (Signal to Noise Ratio), in decibels/mili-volt, is the ratio of
signal power to channel noise power. This value is set by the CMTS.
Upstream
Channel
Information
This is the data path used by the CMTS for receiving information from
your ZyXEL Device.
Lock Status
This indicates whether ZyXEL Device has found an upstream channel.
The ZyXEL Device is either Locked or Not Locked on to the channel
advertised by the CMTS.
Modulation
This is the method used to encode transmission information, similar to
FM or AM on your radio.
The ZyXEL Device supports TDMA, ATDMA, SCDMA, Mixed or
Unknown for the upstream channel.
Channel ID
This is a standard channel number from the DOCSIS 2.0 specification.
Channel numbers and channel frequencies are specified in pairs in
DOCSIS 2.0.
Symbol Rate
This is the symbol rate (in Kilo symbols/second) for communication
between the CMTS and the ZyXEL Device. This is set during initial
configuration with a value supplied by the CMTS. Typical values for
QAM64 and QAM256 are 5.05 Mega-symbols/second and 5.36 Mega-
symbols/second.
Upstream
Frequency
This is a standard channel frequency (in hertz) from the DOCSIS 2.0
specification.
Upstream Power The is the power level in decibels/mili-volt (dbmV). This value is set by
the CMTS.
Table 5 Status > CM Status or Status > CableModem Status (continued)
LABEL
DESCRIPTION