Digital Transition - Scenario 6
Digital CATV (QAM) Reception - Digital CATV (QAM) Viewing
| Source | Distribution Network | Viewing Location |
| Digital
CATV (QAM) |
Coax/HFC/Ethernet | Digital
TV - CATV Mode (QAM) |
| Explanation: | |
| The system will allow you to select a few desired digital channels from the local Cable Television Company, and ignore the undesired channels. This system is the digital version of a traditional ‘Cherry Picker’ system. | |
| Application: | |
| This is extremely valuable if a large facility only has a 450 MHz distribution network, and the MSO’s digital offering starts at 650 MHz, there is no room for the digital tier without a costly network upgrade. A transcoder can receive the desired high frequency QAM channels and transcode them to available channels within the existing 450 MHz network, delivering the desired CATV QAM channels, while preventing a costly network upgrade. | |
| Component Block Diagram | Further Information |
 |
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Component Block Diagram - Details
The ATSC to QAM Transcoder is a modular unit that receives the QAM (Digital CATV clear QAM) signal and transcodes it to another CATV QAM channel. This transcoder can be used to “Cherry Pick” selected digital channels from the existing CATV QAM digital lineup and process it for redistribution. If the original CATV QAM channel was encrypted, it will remain encrypted, requiring an authorized set-top for viewing. If the original CATV QAM channel was in the clear, it will remain in the clear, and can be viewed on any television with a QAM digital tuner set to "CATV" mode.
This system will allow the facilities operator to insert the selected CATV QAM carriers in to a bandwidth limited private CATV network. The input digital signal is stripped of its original QAM digital modulation, leaving just the basic data stream. The transcoder then creates a new, clean QAM carrier and reinserts the original data stream on to this new QAM carrier.
Functionality
This system is the digital version of a traditional “Cherry Picker” system. The system will allow you to select a few desired digital channels from the local Cable Television Company, and ignore the undesired channels. These desired digital channels can then be redistributed through the existing hybrid fiber / coaxial network within the facility. This is extremely valuable if a large facility only has a 450 MHz distribution network, and the MSO’s digital offering starts at 650 MHz, there is no room for the digital tier without a costly network upgrade. The transcoder can receive the desired high frequency QAM channels and transcode them to available channels within the existing 450 MHz network, delivering the desired CATV QAM channels, while preventing a costly network upgrade. If the original CATV QAM channel was encrypted, it will remain encrypted, requiring an authorized set-top for viewing. If the original CATV QAM channel was in the clear, it will remain in the clear, and can be viewed on any television with a QAM digital tuner set to "CATV" mode.