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Re: [Discuss-gnuradio] Guide: Understanding the various relationship of


From: Gabriel Morel
Subject: Re: [Discuss-gnuradio] Guide: Understanding the various relationship of gain, decimation and offset values in the captured file USRP.
Date: Mon, 20 Dec 2010 09:51:01 -0500

The input of the adc is between 0 and Vref (i don't know this value).  The gain and the offset are to place the input value between V- and V+ (this values are chosen by you).  The decimation step down the sampling frequency.  I know the operation of the verilog block, but i don't know how to program some new values because i don't understand pyhton at this time.  If you want, i can send you a block schematic of the top of the FPGA to help you to understand.
 
Can this help you?
 
Gab
----- Original Message -----
From: ton ph
Sent: Monday, December 20, 2010 3:45 AM
Subject: [Discuss-gnuradio] Guide: Understanding the various relationship of gain, decimation and offset values in the captured file USRP.

Hi everyone,
  I am a bit trying to understand the relationship of the gain,offset and decimation parameter in the USRP and
what it reflects in the capturing of the files ... If i want to get a proper output of a particular frequency with proper
output how can i adjust them.
Althou i do realise my question / doubt may be a bit different or may be unrealistic and the way i asked my
question may be a bit Ambigious.. please do tolerate it and also ask me if so , so that i can make it more clearer....

Thanks guys in advance....


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