Cisco Headend System Release 2.7 Installation Guide
Chapter 3 Setting Up Hubs, MPEG Sources, MQAM Modulators, PCGs, and SCSs
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4017650 Rev C
9 Click the Modulation Type arrow and select the modulation this MQAM
modulator uses. For example, if this is a 256 MQAM that uses ITU A modulation,
you should select ITU J83 Annex A (8 MHz).
you should select ITU J83 Annex A (8 MHz).
10 Click in the Default Gateway field and type the default gateway address for this
MQAM modulator.
11 For each ASI Input Transport Stream ID on this MQAM modulator, click in the
ASI INPUT 1 (2) Transport Stream ID field and type the number identifying the
transport stream(s) receiving the data from the associated MPEG source(s) that
are physically connected to the input port(s) on this MQAM modulator.
transport stream(s) receiving the data from the associated MPEG source(s) that
are physically connected to the input port(s) on this MQAM modulator.
12 For each output port on this MQAM modulator, click in the Transport Stream
ID field in each RF OUT row, and type the number identifying the transport
stream(s) carrying data from this MQAM modulator out to the hubs on your
system.
Note: You must specify unique transport stream IDs for both output ports on the
MQAM modulator.
stream(s) carrying data from this MQAM modulator out to the hubs on your
system.
Note: You must specify unique transport stream IDs for both output ports on the
MQAM modulator.
13 For each output port on this MQAM modulator, click the Modulation Type
arrow in each RF OUT row, and select the type of modulation this MQAM
modulator uses. For example, if this is a 256 MQAM modulator that uses ITU A
modulation, you would select 256-QAM.
modulator uses. For example, if this is a 256 MQAM modulator that uses ITU A
modulation, you would select 256-QAM.
14 For each output port on this MQAM modulator, click in the Channel Center
Frequency (MHz) field in each RF OUT row, and type the frequency of the
channel you will use to send data from this MQAM modulator to the hubs on
your system. We recommend that you enter a value in 8 MHz increments from
108 to 858.
channel you will use to send data from this MQAM modulator to the hubs on
your system. We recommend that you enter a value in 8 MHz increments from
108 to 858.
15 For each output port on this MQAM modulator, click in the Symbol Rate (Ms/s)
field in each RF OUT row, and type the symbol rate.
16 Is Spectral Inversion enabled?
If yes, clear the selection, then go to step 17.
If no, go to step 17.
Important: The recommended setting is not enabled.
17 Click Apply. The system saves the MQAM modulator information you have
entered into the DNCS database.
18 Your next step is to set up the advanced parameters for the program MQAM
modulator. Go to Setting Up Program MQAM Modulator Advanced Parameters
(on page 44).
(on page 44).
Setting Up Program MQAM Modulator Advanced Parameters
After you set up the basic parameters for a program MQAM modulator, complete
these steps to set up the advanced parameters.
1 On the Set Up MQAM window, click the Advanced Parameters tab. The
these steps to set up the advanced parameters.
1 On the Set Up MQAM window, click the Advanced Parameters tab. The
Advanced Parameters tab information moves to the forefront.