Re: [Discuss-gnuradio] Using external clock references in GRC environment

[Nazmul Islam]

I have attached a screenshot that shows that way I am using the USRP:UHD Sink block. I am running both of my USRP's with the same 10 MHz clock signal. The clock signal is coming from a function generator. Therefore, I have changed the clock source option in the USRP Sink block to be external.

Unfortunately, I am getting wrong/strange outputs due to this change. Do I need to make any other change in the flowgraph to make it work with external clock source?

Thanks,

Nazmul

On Tue, Jun 5, 2012 at 4:31 PM, Nazmul Islam <address@hidden> wrote:

Hello,

I am running two USRP2's with a 10 MHz external clock. I am using gnuradio-companion to transmit data between the USRP's. I have changed the clock source option as 'external' in the UHD:USRP Source & Sinc blocks. I kept the time source and clock rate block as default since I am not providing any external pps.  

Unfortunately, I am getting unexpected and wrong outputs. Do I need to make any other changes in the USRP Source & Sink options? 

Thanks,

Nazmul

--
Muhammad Nazmul Islam

Graduate Student
Electrical & Computer Engineering
Wireless Information & Networking Laboratory
Rutgers, USA.

-- 
Muhammad Nazmul Islam

Graduate Student
Electrical & Computer Engineering
Wireless Information & Networking Laboratory
Rutgers, USA.

external_clock_grc.png
Description: PNG image