User's Manual

Vyyo Installation Guide
www.vyyo.com
Synoptics Display for XMTS Configuration – p. 132
4. Using this popup window, you may change the frequency the modem is
expected to transmit on (labelled “Frequency”), the receive frequency that
the upstream RF port expects to receive the modem’s signal on (this is
labelled “Rx frequency”), its modulation, symbol rate and the associated
downstream channel, antenna diversity and admin status as needed.
These parameters are transmitted by the XMTS as part of the upstream
channel descriptor (UCD) sent during the DOCSIS modem initialization
process. These parameters should be determined by the system
engineer responsible for the RF planning and are outside the scope of
this manual.
Figure 11-4: Upstream Channel Parameters
Set this to ‘up” to operate this
channel or “down” to turn it off
The modem transmits on this frequency
Link LayerDOCSIS parameters
RF DOCSIS parameters
This XMTS upstream channel is set to
receive on this frequency
This is the XMTS downstream channel
associated with this XMTS upstream
channel
Check this box unless your System
Engineer indicates otherwise
Check this box and click on “OK” to
save these upstream parameters
permanently in the XMTS memory