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.
Kimsey
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