Re: [Discuss-gnuradio] USRP Noise Floor

[Matt Ettus]

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.

Matt

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
>
> Tim
>
> 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.
>
>     Regards,
>     Pelin Yalcin
>     Research Assistant
>     Center for Wireless Communications and Signal Processing Research
>     (CWCSPR)
>     New Jersey Institute of Technology
>
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