# Hello! This is bean, I am studying in Tokyo institute of technology in Japan, I am trying to mak

**URL:** <https://www.ruby-forum.com/t/hello-this-is-bean-i-am-studying-in-tokyo-institute-of-technology-in-japan-i-am-trying-to-mak/232906>\
**Category:** GNU Radio\
**Created:** [November 4, 2014, 9:32am UTC](https://www.ruby-forum.com/t/hello-this-is-bean-i-am-studying-in-tokyo-institute-of-technology-in-japan-i-am-trying-to-mak/232906 "2014-11-04T09:32:08Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**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:** [November 4, 2014, 9:32am UTC](https://www.ruby-forum.com/t/hello-this-is-bean-i-am-studying-in-tokyo-institute-of-technology-in-japan-i-am-trying-to-mak/232906/1 "2014-11-04T09:32:08Z")

</div>

Hello!

This is bean, I am studying in Tokyo institute of technology in Japan,

I am trying to make a SISO channel sounder using two USRPN210.

I am facing a problem that PC cannot pick up all the samples from USRP

when I do real-time transmission. In other words, some data are lost  
during the transmission.

In order to overcome this problem, I am trying to save one snapshot of

transmit signal into FPGA’s memory at first, then make USRP transmit  
this snapshot of signal repeatedly.

In receiver side, I want to make USRP receiver catch one snapshot of  
signal, and keep it inside

the FPGA , then I will pick up this snapshot afterwards.

the specification of my channel sounder is like below

* * *

center frequency: 2.4GHz

bandwidth: 25MHz

* * *

I want to ask about how to save one snapshot of transmit signal into  
FPGA’s memory and then transmit it?

also, How can I pick up the snapshot of signal from FPGA?

Can I do this on gnuradio-companion?

or is there any other methods to solve this problem?

Thanks a lot here

Best regards