[Discuss-gnuradio] Re: Q. USRP2+RFX2400 performances on dynamic range, and decim

[Yc Park]

Eric Blossom wrote:
> On Thu, May 21, 2009 at 08:23:31AM +0200, Yc Park wrote:
>> The recorded signal showed only about 25dB between the in-band spectrum
>> level(-25dBm/RBW) and the noise floor (-50dBm/RBW) while the original
>> signal shows at least 45dB.
> 
> What gain setting are you using?
> Have you tried lowering it?
> 
> Eric

The gain was 10dB.  With higher gain, the ACPR gets worse with the given 
input power.

I'm sorry that I do not know how to upload the captured spectrum, but it 
is exactly as I mentioned in the first place: The noise floor is about 
-50dBm while the in-band signal is at -25dBm over the 8.8MHz of the 
signal bandwidth.

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