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Re: [Discuss-gnuradio] USRP 2 Daughter Cards
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] USRP 2 Daughter Cards |
Date: |
Thu, 19 Feb 2009 09:54:31 -0800 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Thu, Feb 19, 2009 at 10:15:29AM -0500, jim graham wrote:
> I am trying to use the USRP 2 radio. I have been using the
> rx_streaming_sample script to collect data.
>
> If I use the rfx1800 daughtercard the results from the set_center_freq
> command seem correct but the output
>
> looks as if the receive channel is not connected (changing gain does not
> affect output levels).
What OS, version, distribution, architecture?
Which version of the GNU Radio code?
Are you feeding this with a signal generator? What's your input
signal level? Which antenna port are you connected to? Have you tried
running usrp2_fft.py?
> If I try the lfrx or dbs daughter cards the set_center_freq response
> appears incorrect. The baseband frequency is 0 and the ddc frequency
> is the negative of the commanded frequency.
Those values are correct. Have you tried injecting a signal into the
board and looking at it using usrp2_fft.py?
Eric