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Re: [Discuss-gnuradio] USRP TX to RX

From: Bob Vincent
Subject: Re: [Discuss-gnuradio] USRP TX to RX
Date: Thu, 17 Feb 2005 11:35:11 -0500

I've been trying this for a few days.
Today I hooked up a spectrum analyzer, and found there is a problem in the outgoing interp filter.
What happens is that over time the signal gets corrupted. The resulting frequency domain plot eventually looks like a triangle.
I'm trying to save the screen to a floppy disk (this is an old Rhode-Schwartz, but it still works fine). I'll post when I have it.

I suspect the decimating filter on the receive side may have a similar problem. I can't really debug yet because I'm not (yet) a FPGA expert, but give me time...

Also did a loopback last week replacing the usrp with a named pipe. That works fine.

At 10:51 AM 2/17/2005, Kimsey Pollard wrote:
Has anybody tried transmitting on the USRP TX, known signals
and frequencies and feeding them back into the RX for confirmation?
A test loop of sorts.


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