# (no subject)

**URL:** <https://www.ruby-forum.com/t/no-subject/241329>\
**Category:** GNU Radio\
**Created:** [March 30, 2015, 10:01am UTC](https://www.ruby-forum.com/t/no-subject/241329 "2015-03-30T10:01:57Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![musicdenotation](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ea666f/32.png) [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\
**Post date:** [March 30, 2015, 10:01am UTC](https://www.ruby-forum.com/t/no-subject/241329/1 "2015-03-30T10:01:57Z")

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Hi,  
I’m trying to use the costas loop to get an timing estimate for  
16QPSK.  
What will be the value of error proportional constant K? How to choose  
the  
K value?  
thanks for your replay