# DBPSK transmission and reception of text file

**URL:** <https://www.ruby-forum.com/t/dbpsk-transmission-and-reception-of-text-file/252719>\
**Category:** GNU Radio\
**Created:** [July 15, 2019, 8:41pm UTC](https://www.ruby-forum.com/t/dbpsk-transmission-and-reception-of-text-file/252719 "2019-07-15T20:41:27Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![varvarip](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/v/a9a28c/32.png) [@varvarip](https://www.ruby-forum.com/u/varvarip)\
**Post date:** [July 15, 2019, 8:41pm UTC](https://www.ruby-forum.com/t/dbpsk-transmission-and-reception-of-text-file/252719/1 "2019-07-15T20:41:27Z")

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Hello everyone! I am setting up the following GNURadio algorithm to send and receive data from a text file. If I don’t use TX-RX and simply connect the DPSK Mod block to Costas Loop the system works perfectly. So I must be doing something wrong with the trasmission and reception blocks

 ![66664970_3020690424638139_4654929737733373952_o](https://www.ruby-forum.com/uploads/default/original/2X/8/83b9ee927cd3239d20bc4fc2e993a02c3e88317a.jpeg)  
Could you help me locate the problem?