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[Discuss-gnuradio] Data Rate is doubled after receiving data from USRP


From: Muhammad Munir
Subject: [Discuss-gnuradio] Data Rate is doubled after receiving data from USRP
Date: Wed, 3 Jan 2018 10:25:53 +0500

Dear All,
I am confused to understand a behavior of GNURADIO USRP Source block. The problem is,
1. I connected USRP N200 with my PC.
2. I set both the cahnnels of USRP
3. I set the sampling rate of both as 5MHz
4. I connected one channel directly to the Frequency Sink Block
5. I connected the 2nd channel with TCP sink to transfer data of channel 2 to the other PC.
6. When I started the flow graph and checked for data rate on system monitor,
 I was receiving data at 40MBps and sending data was at 80 MBps.
Can anyone explain this behaviour? 
Is it the issue with Gnuradio USRP source block? 
I read a long before that UHD block gets samples from USRP and combine two samples into single for comples output. If it is, then It should not affect the data rate?

Kind Regards,
M. Munir

Attachment: TCP.png
Description: PNG image


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