# DVB-S2X update to gr-dvbs2

**URL:** <https://www.ruby-forum.com/t/dvb-s2x-update-to-gr-dvbs2/231188>\
**Category:** GNU Radio\
**Created:** [July 26, 2014, 2:22am UTC](https://www.ruby-forum.com/t/dvb-s2x-update-to-gr-dvbs2/231188 "2014-07-26T02:22:46Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [July 26, 2014, 2:22am UTC](https://www.ruby-forum.com/t/dvb-s2x-update-to-gr-dvbs2/231188/1 "2014-07-26T02:22:46Z")

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gr-dvbs2 has been updated to include all of the normal frame size  
code rates, roll-off factors and constellations in the DVB-S2 extension  
specification, DVB-S2X. Note that gr-dvbs2 is transmit only.

> **[GitHub - drmpeg/gr-dvbs2: A DVB-S2 and DVB-S2X transmitter for GNU Radio](https://github.com/drmpeg/gr-dvbs2)**
>
> A DVB-S2 and DVB-S2X transmitter for GNU Radio. Contribute to drmpeg/gr-dvbs2 development by creating an account on GitHub.

[https://www.dvb.org/resources/public/standards/a83-2\_dvb-s2x\_den302307-2.pdf](https://www.dvb.org/resources/public/standards/a83-2_dvb-s2x_den302307-2.pdf)

Since the specification was just released in March 2014, there  
are no consumer of prosumer receivers available yet. Therefore,  
the new DVB-S2X modes are not fully tested. However,  
there are only minor software changes required, so confidence  
is high that the new modes will work properly. Regular DVB-S2  
modes have been retested to ensure there are no regression  
problems.

Here’s what one of the 256APSK constellations looks like in GRC.

256APSK

Ron

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**Author:** ![deadprogrammer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/94ad74/32.png) [@deadprogrammer](https://www.ruby-forum.com/u/deadprogrammer)\
**Post date:** [July 26, 2014, 2:56am UTC](https://www.ruby-forum.com/t/dvb-s2x-update-to-gr-dvbs2/231188/2 "2014-07-26T02:56:14Z")

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