# ATSC blocks

**URL:** <https://www.ruby-forum.com/t/atsc-blocks/243244>\
**Category:** GNU Radio\
**Created:** [September 3, 2015, 3:48pm UTC](https://www.ruby-forum.com/t/atsc-blocks/243244 "2015-09-03T15:48:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Sadaf\_N](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/858c86/32.png) [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\
**Post date:** [September 3, 2015, 3:48pm UTC](https://www.ruby-forum.com/t/atsc-blocks/243244/1 "2015-09-03T15:48:04Z")

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I’ve got more info on my problem. Some of the blocks, including ATSC  
Field Sync Demux, are missing. Could they have been renamed or combined  
into other blocks? I don’t understand why blocks would be missing from  
the latest stable Live DVD.  
Any light shed on this would be greatly appreciated.

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**Author:** ![Henry\_Barton](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/c57346/32.png) [@Henry\_Barton](https://www.ruby-forum.com/u/Henry_Barton)\
**Post date:** [September 3, 2015, 4:04pm UTC](https://www.ruby-forum.com/t/atsc-blocks/243244/2 "2015-09-03T16:04:26Z")

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I believe ATSC Field Sync Demux is now called ATSC Field Sync Checker.

Ron