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Re: [Discuss-gnuradio] Frequency error in USRP.


From: Tarun Tiwari
Subject: Re: [Discuss-gnuradio] Frequency error in USRP.
Date: Tue, 10 Apr 2007 16:58:34 -0500

Hi Brian,
Thank you for reply.

On 4/10/07, Brian Padalino <address@hidden> wrote:
The 64MHz oscillator on the board has a maximum 50PPM error.  This
gives an error of up to 3200Hz.

To get to 2.4GHz, that's 37.5x the 64MHz local oscillator.

    3200Hz * 37.5 = 120kHz.

    2.4e9 - 120e3 = 2.399880e9

So, in my case its OK and in the range right... i.e.
  
2.4 GHz -  2.39989 GHz = 110 kHz

So it is pretty possible that your oscillators are just that far off?

Can you please enlighten me, how to deal with this problem, as this is pretty obvious in a practical system.

Brian

Tarun

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