Cisco Headend System Release 2.7 Installation Guide
Chapter 4 Post-Upgrade Procedures
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Reset the Modulators
Resetting the Modulators
Introduction
The upgrade to SR 4.0 SP2 updates your QAM, MQAM, GQAM, and GoQAM
modulator code. After the upgrade, you need to reset the modulators in order for the
modulators to operate with the new code.
modulator code. After the upgrade, you need to reset the modulators in order for the
modulators to operate with the new code.
Note: Depending upon your upgrade scenario, you may not have to complete this
procedure. If your upgrade did not modify QAM, MQAM, GQAM, or GoQAM
modulator code, you can skip this procedure.
procedure. If your upgrade did not modify QAM, MQAM, GQAM, or GoQAM
modulator code, you can skip this procedure.
You have the following methods available when you reset modulators:
You can use the traditional method of resetting modulators through the DNCS
GUI.
GUI.
You can reset the modulators (except the QAM modulator) through the front
panel of the modulators. The QAM modulator resets through the power switch
on the back panel.
panel of the modulators. The QAM modulator resets through the power switch
on the back panel.
You can use the auditQam utility to reset the modulators through the command
line of the DNCS.
line of the DNCS.
Important Notice Regarding the Reset of Modulators
On occasion, for testing purposes, default configuration files for headend
components are changed. For example, a site might substitute a file called
mqam250.config, instead of mqam.config, for the MQAM configuration file. If the
site you have upgraded uses a custom configuration file, and if you are now ready to
use the default configuration file again, you need to update the configuration file
settings for your headend equipment.
components are changed. For example, a site might substitute a file called
mqam250.config, instead of mqam.config, for the MQAM configuration file. If the
site you have upgraded uses a custom configuration file, and if you are now ready to
use the default configuration file again, you need to update the configuration file
settings for your headend equipment.
The following list includes the default configuration files for the QAM-family of
devices:
devices:
CAQAM-/tftpboot/qam.config
GQAM-/tftpboot/gqam.config
GOQAM-/tftpboot/goqam.config
MQAM-/tftpboot/mqam.config