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24 December 2007, Download PDF File
This document defines a standard for synchronization of multiple transmitters emitting trellis-coded 8-VSB signals in accordance with ATSC A/53, Part 2:2007 (RF/Transmission Systems Characteristics). The emitted signals from transmitters operated according to this standard comply fully with the requirements of ATSC A/53. This document specifies mechanisms necessary to transmit synchronization signals to the several transmitters using a dedicated PID value, including the formatting of packets associated with that PID and without altering the signal format emitted from the transmitters. It also provides for adjustment of transmitter timing and other characteristics through additional information carried in the specified packet structure. Techniques are provided for cascading transmitters in networks of synchronous translators. The techniques defined for synchronization of multiple transmitters may also be applied to single transmitters when it is necessary or desirable to synchronize processes conducted at the input end of a transport link with those carried out at a transmitter location, as may be useful for enhanced transmission techniques. |
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