Cisco DNCS System Release 2.8.1 3.8.1 4.3.1 User Guide

Before you add a QPSK demodulator to a QPSK modulator, you need the following information:



Name of the modulator physically connected to this demodulator



Port number where this demodulator is physically connected to the modulator



Name of the node set you want to associate with this demodulator

Important: We recommend that you assign each demodulator to a unique node set.



RF input frequency assigned to this demodulator

Important: We recommend the following:



That you set this value to equal the service channel frequency of the associated modulator. 



That you set all demodulators associated with the same modulator to the same frequency.

Note: All of this information should be recorded on your network map. However, if it is not, contact your
system administrator to obtain the information.

After you have added a QPSK modulator to the DNCS database, add all QPSK demodulators that are connected
to that modulator. To add a QPSK demodulator to a QPSK modulator, follow this process. 

1.

where a group of reverse signals generated from DHCTs are combined and fed into a single QPSK
demodulator.

 to a QPSK modulator by assigning each demodulator to the port number on

the modulator that matches the actual physical connections between the modulator and demodulator.

Important: We recommend that you set all demodulators associated with the same modulator to the
same frequency. 

Note: For a list of information needed to add the demodulator to the DNCS, go to 

.