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From: | Matt Ettus |
Subject: | Re: [Discuss-gnuradio] Suse10.1 walkthrough and a question concerning crosstalk |
Date: | Sun, 24 Sep 2006 20:52:09 -0700 |
User-agent: | Mozilla Thunderbird 1.0.8-1.1.fc4 (X11/20060501) |
Mark Sullivan wrote:
When I inject a signal at a -45 dBm level on the "RX-B" sma connector on a Basic RX daughtercard, I see a copy of the signal on the "RX-A" side when I use usrp_fft.py. The level is 10-20 dB below that of what I see if I move the signal from "RX-B" to "RX-A," but this seems like too much coupling. Using a 50 ohm termination on the unconnected sma connector helps a little bit. I see no copy of the signal from either input of the other Basic RX daughtercard. Any thoghts, anyone?
I don't know what's happening here, but I see about -80dB coupling between the channels.
Here is a walkthough I put together for Suse10.1. I found a few "gotchas" not described in the build instructions on the Wiki.
Thanks! I put this on the wiki, but didn't "wikify" the formatting. Feel free to edit it. It is linked to from the Suse install page.
Matt
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