Cisco Model D-PCG1000 PowerKEY CAS Gateway Technical References
Adding and Splitting QPSK
Modulators for System Release
2.7/3.7/4.2 and Later
Modulators for System Release
2.7/3.7/4.2 and Later
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 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.
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 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 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 This Procedure be Performed?
This procedure should be performed during a maintenance window of
approximately 1 to 3 hours due to the need to reboot the set-top boxes affected by
the split.
approximately 1 to 3 hours due to the need to reboot the set-top boxes affected by
the split.
System Release Version
This document is written for sites operating System Release (SR) 2.7/3.7/4.2 and
SR 2.7.1/3.7.1 or SR 4.2.1.
SR 2.7.1/3.7.1 or SR 4.2.1.