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Re: [Discuss-gnuradio] USRP2 - BasicTX first Nyquist zone frequencies
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] USRP2 - BasicTX first Nyquist zone frequencies |
Date: |
Mon, 16 Mar 2009 12:36:36 -0700 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Mon, Mar 16, 2009 at 10:05:28AM -0300, Ronaldo Nunez wrote:
> Hello,
>
> I read in faq that the bigger frequency of the first Nyquist zone of
> USRP2 is about 170 MHz, using a BasicTX daughter board.
> My USRP2 couldn't get more than 50 MHz with this daughter board.
>
> I'm using 9939 firmware revision.
>
> Somebody observed the same problem with usrp2?
> There is a way to fix it?
>
> Thanks
I'm not sure where you found the 170 MHz number, or where it may have
come from, but the USRP2 DACS run at 100 MS/s. With the Basic Tx
50 MHz is what you would expect to see as the edge of the first
Nyquist zone.
Eric