Cisco Model D-PCG1000 PowerKEY CAS Gateway Referências técnicas
September 2005
Adding and Splitting QPSK Modulators for
System Releases 2.5, 3.5, and 4.0
System Releases 2.5, 3.5, and 4.0
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). As a part of the
upgrade, it is also occasionally necessary to move certain cable 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.
add new quadrature phase-shift keying (QPSK) modulators and QPSK
demodulators to the Digital Broadband Delivery System (DBDS). As a part of the
upgrade, it is also occasionally necessary to move certain cable 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 must be performed with care. Do not attempt this
procedure unless you are an experienced headend technician.
existing QPSK modulators must be performed with care. Do not attempt this
procedure unless you are an experienced headend technician.
When Should I Perform This Procedure?
Perform this procedure during a maintenance window of approximately 1 to 3 hours
due to the need to reboot the cable boxes affected by the split.
due to the need to reboot the cable boxes affected by the split.
System Release Version
This document is written for sites operating System Release 2.5, 3.5, or 4.0.