Cisco Headend System Release 2.7 Installation Guide
Add and Configure the RNCS
4022447 Rev B
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DHCT Subnet Mask—Enter the subnet mask for all DHCTs within the
domain of this modulator.
domain of this modulator.
Frequency—Enter the RF output frequency assigned to this modulator. This
value can be from 70 to 130 MHz in increments of 0.25 MHz.
value can be from 70 to 130 MHz in increments of 0.25 MHz.
DCM (DHCT Communications Mode)—
Select the appropriate DCM from
one of the following choices:
–
–
DAVIC—Select if DHCTs receive all communications (out-of-band and
unicast data) on a DAVIC channel.
unicast data) on a DAVIC channel.
–
Mixed DOCSIS/DAVIC—Select if DHCTs receive out-of-band data on a
DAVIC channel, and unicast communications on a DOCSIS channel.
DAVIC channel, and unicast communications on a DOCSIS channel.
–
DOCSIS—Select if DHCTs receive out-of-band data and unicast data on
a DOCSIS channel. (The DAVIC channel may be used for out-of-band
data if the DOCSIS channel is impaired.)
a DOCSIS channel. (The DAVIC channel may be used for out-of-band
data if the DOCSIS channel is impaired.)
ADSG Options—Options for creating ADSG bridges for CableCARD
®
module communications. Refer to Advanced DOCSIS Set-Top Gateway
Application Guide For System Release 3.8/4.3 (part number 4022455) for more
information.
Application Guide For System Release 3.8/4.3 (part number 4022455) for more
information.
Basic Options
–
–
Continuous Wave Mode—Determines whether the QPSK produces an
unmodulated RF carrier. This is useful when performing testing.
unmodulated RF carrier. This is useful when performing testing.
–
Mute RF Output—Determines whether the QPSK's RF output port is
muted. This is helpful when installing the QPSK.
muted. This is helpful when installing the QPSK.
–
Broadcast Only Mode—Determines whether the QPSK sends priority
broadcast transmissions.
broadcast transmissions.
–
Database Persistence—Determines whether the QPSK stores the IP
addresses of DHCTs in RAM.
addresses of DHCTs in RAM.
6 Click the Advanced Parameters tab.
7 In general, the system sets up the QPSK modulator advanced parameters
7 In general, the system sets up the QPSK modulator advanced parameters
automatically, and you should not change them. However, if you need to change
any of these parameters, use these descriptions as guidelines:
any of these parameters, use these descriptions as guidelines:
Configuration File Name—Do not change this parameter without first
consulting Cisco Services.
consulting Cisco Services.
Service Channel Frequency—Enter a value from 8 to 26.5 MHz based on your
plant design. This parameter establishes the frequency that the DHCTs use to
broadcast to the demodulators on this hub.
plant design. This parameter establishes the frequency that the DHCTs use to
broadcast to the demodulators on this hub.