# FFSK\_Demod question

**URL:** <https://www.ruby-forum.com/t/ffsk-demod-question/230326>\
**Category:** GNU Radio\
**Created:** [June 10, 2014, 7:51pm UTC](https://www.ruby-forum.com/t/ffsk-demod-question/230326 "2014-06-10T19:51:42Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jason\_sam](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/7993a0/32.png) [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\
**Post date:** [June 10, 2014, 7:51pm UTC](https://www.ruby-forum.com/t/ffsk-demod-question/230326/1 "2014-06-10T19:51:42Z")

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Hello everyone,  
I have a RTL file modulated by FFSK. However, I could not find any  
FFSK demod block from GNU Radio. Can I just use a GMSK one and later  
change the magnitude? Or is there any other way to demodulate that you  
suggest?  
Thanks in advance!