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Re: [Discuss-gnuradio] rf to data file - usrp_rx_file.py
From: |
Matt Ettus |
Subject: |
Re: [Discuss-gnuradio] rf to data file - usrp_rx_file.py |
Date: |
Wed, 23 Mar 2005 09:26:23 -0800 |
User-agent: |
Internet Messaging Program (IMP) 4.0-cvs |
> I have been trying to find a way to use usrp_rx_file.py to grab a
> certain bandwidth and sample rate from my usrp and save it into a
> file. By moving the decimation value to max i can't get the bandwidth
> down to 12.5khz.
The USRP hardware will only decimate by up to 128 at this time. That will give
you 500 ks/s complex and 500 khz of BW. In software you should then pass the
signal through a decimating FIR filter to get it down to the width you'd like.
Nearly all of them examples show how to use one of these filters.
> How could I add a bandpass filter to usrp_rx_file.py? Is this even the
> right way to go?
Yes
> Also, is it possible to transmit the captured rf from the file at a later
> date?
Just reverse the process you used to receive it.
Matt