Cisco Model D-PCG1000 PowerKEY CAS Gateway Technical References
Adding and Splitting QPSK
Modulators for System Releases
2.8/3.8/4.3
Modulators for System Releases
2.8/3.8/4.3
Overview
Introduction
When cable service providers expand or upgrade services, it is often necessary to
add new quadrature phase-shift keying (QPSK) modulators and QPSK
demodulators to the Digital Broadband Delivery System (DBDS).
add new quadrature phase-shift keying (QPSK) modulators and QPSK
demodulators to the Digital Broadband Delivery System (DBDS).
As a part of normal system administration and network planning, it may
occasionally be necessary to move certain set-top boxes that are provisioned on an
existing QPSK modulator to a new QPSK modulator and demodulator. This
procedure is often referred to as “splitting” QPSK modulators.
occasionally be necessary to move certain set-top boxes that are provisioned on an
existing QPSK modulator to a new QPSK modulator and demodulator. This
procedure is often referred to as “splitting” QPSK modulators.
Who Should Perform This Procedure?
Adding new QPSK modulators and demodulators on the DBDS, and splitting
existing QPSK modulators, are both procedures that must be performed with care.
Do not attempt either procedure unless you are an experienced headend
technician.
existing QPSK modulators, are both procedures that must be performed with care.
Do not attempt either procedure unless you are an experienced headend
technician.
When Should This Procedure be Performed?
Perform this procedure during a maintenance window of approximately 1 to 3
hours. You will need this time to reboot set-top boxes affected by the procedure.
hours. You will need this time to reboot set-top boxes affected by the procedure.
System Release Version
This document is written for sites operating System Release (SR) 2.8/3.8/4.3.