# Edit receive Functionaility in USRP Echotimer for USRP Source

**URL:** <https://www.ruby-forum.com/t/edit-receive-functionaility-in-usrp-echotimer-for-usrp-source/257583>\
**Category:** GNU Radio\
**Created:** [March 5, 2020, 6:24pm UTC](https://www.ruby-forum.com/t/edit-receive-functionaility-in-usrp-echotimer-for-usrp-source/257583 "2020-03-05T18:24:05Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![avashist003](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/839c29/32.png) [@avashist003](https://www.ruby-forum.com/u/avashist003)\
**Post date:** [March 5, 2020, 6:24pm UTC](https://www.ruby-forum.com/t/edit-receive-functionaility-in-usrp-echotimer-for-usrp-source/257583/1 "2020-03-05T18:24:05Z")

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Hi,  
I am using USRP Echotimer block that has one antenna as transmitter and other (RX2) as radar receiver.  
In my design, I want to switch between radar receiver to normal data receiver. The gnuradio does not allow to use an USRP Source as a block within the same flow graph as of USRP Echotimer.  
Is there a way to change the source code of echotimer to add the functionality of usrp source, or is there an obvious way to do this that I am missing.

Thanks,  
Abhishek