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Television > HDTV Tech > Head-end Techni...
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Head-end Technicalities

by Cinderlane@[EMAIL PROTECTED] (Cinder Lane) Apr 24, 2008 at 09:34 AM

What are the steps at a CATV head-end facility to convert 8VSB from an
off-air receiver to QAM for remodulation?

Must each subchannel be broken out and processed separately before being
recombined into its new channel?  

Does each modulator have a finite number of inputs (for the
subchannels), or are the subchannels combined in a separate device
before being fed into the modulator?

Is the PSID encoder a part of each QAM modulator, or must PSID
information be inserted into each feed *prior* to being fed into the
modulator?
 




 17 Posts in Topic:
Head-end Technicalities
Cinderlane@[EMAIL PROTECT  2008-04-24 09:34:01 
Re: Head-end Technicalities
Steve Urbach <dragonsc  2008-04-24 07:52:08 
Re: Head-end Technicalities
pj <pj4380@[EMAIL PROT  2008-04-24 10:36:33 
Re: Head-end Technicalities
Steve Urbach <dragonsc  2008-04-24 21:00:41 
Re: Head-end Technicalities
phil-news-nospam@[EMAIL P  2008-04-25 22:14:03 
Re: Head-end Technicalities
Jim Yanik <jyanik@[EMA  2008-04-26 02:23:41 
Re: Head-end Technicalities
Steve Urbach <dragonsc  2008-04-25 22:54:36 
Re: Head-end Technicalities
phil-news-nospam@[EMAIL P  2008-04-26 07:03:09 
Re: Head-end Technicalities
Jim Yanik <jyanik@[EMA  2008-04-26 18:21:20 
Re: Head-end Technicalities
phil-news-nospam@[EMAIL P  2008-04-27 06:18:39 
Re: Head-end Technicalities
Jim Yanik <jyanik@[EMA  2008-04-27 20:35:12 
Re: Head-end Technicalities
phil-news-nospam@[EMAIL P  2008-04-26 06:59:41 
Re: Head-end Technicalities
Jim Yanik <jyanik@[EMA  2008-04-26 18:23:22 
Re: Head-end Technicalities
phil-news-nospam@[EMAIL P  2008-04-27 06:20:27 
Re: Head-end Technicalities
Jim Yanik <jyanik@[EMA  2008-04-27 20:42:09 
Re: Head-end Technicalities
G-squared <stratus46@[  2008-04-25 11:26:39 
Re: Head-end Technicalities
phil-news-nospam@[EMAIL P  2008-04-25 22:07:41 

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tan12V112 Thu Dec 4 11:42:10 CST 2008.