Technical information

Cuda 12000 IP Access Switch CudaView Administration Guide
Configuring Upstream Channels 499
Table 18-7 Description of Upstreams Parameters Window..
Parameter Description
Channel Status Normally, displays the current status of the upstream
channel, and allows you to set the status of the
channel. Up indicates that the channel is active; Down
indicates that the channel is inactive.
To set the channel to a different state, from the
pull-down menu choose the channel state that you
want.
Center Frequency
(MHz)
Sets the upstream signal frequency for the RF carrier.
There is a difference between the frequency range
values for DOCSIS and EuroDOCSIS modules. Valid
DOCSIS upstream values range from 5.0 - 42.0 MHz.
Valid EuroDOCSIS upstream values range from 5.0 -
65.0 MHz.
Upstream Channel
Width (kHz)
Sets the upstream channel width in kilohertz (kHz). By
default, the Channel Width is set at 3200 kHz (2560
kilosymbols - ksyms). From the drop-down menu, you
may choose one of the following acceptable values:
■ 200 kHz (160 ksyms per second)
■ 400 kHz (320 ksyms per second)
■ 800 kHz (640 ksyms per second)
■ 1600 kHz (1280 ksyms per second)
■ 3200 kHz (2560 ksyms per second)
The symbol rate is recomputed as follows:
symbol rate = channel width/1.25
A higher symbol rate is more susceptible to RF noise
and interference.
If you use a symbol rate or modulation format beyond
the capabilities of your HFC network, there may be
packet loss or loss of cable modem connectivity.