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Re: [Discuss-gnuradio] USRP Noise Floor

From: Matt Ettus
Subject: Re: [Discuss-gnuradio] USRP Noise Floor
Date: Fri, 30 Oct 2009 16:27:31 -0700
User-agent: Thunderbird (X11/20090825)

Yes, because the XCVR2450 is highly integrated, its phase noise will not be as good as the RFX2400. I don't think it is quite 20dB worse, but maybe 10-15 dB.


Tim Pearce wrote:
I've had quite a few problems which I think are caused by poor phase noise on the XCVR2450 -- it's an all in one chip with a local oscillator on board etc - the 2400 appears quite a bit better (20dB if I remember correctly!)

The schematics are in an odd place for this board - I could only find a link under the USRP1 page http://gnuradio.org/trac/attachment/wiki/USRP/xcvr2450_rev1.1.pdf


On Tue, Oct 27, 2009 at 6:41 AM, N. Pelin Yalcin <address@hidden <mailto:address@hidden>> wrote:

    Dear All,

    I would like to learn the noise floor of a receiver which uses USRP,
    XCVR2450 and VERT2450.
    Namely, when usrp_fft.py is run with no incoming signal present in
    an indoor environment, what is the expected noise level?
    Thanks in advance.

    Pelin Yalcin
    Research Assistant
    Center for Wireless Communications and Signal Processing Research
    New Jersey Institute of Technology

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