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[Discuss-gnuradio] Re: Q. USRP2+RFX2400 performances on dynamic range, a
From: |
Yc Park |
Subject: |
[Discuss-gnuradio] Re: Q. USRP2+RFX2400 performances on dynamic range, and decim |
Date: |
Fri, 22 May 2009 04:21:35 +0200 |
Yc Park wrote:
> 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.
Forgot to mention: I also tested the gain 0, -10(I guess the result with
negative gain was same with 0dB). But nothing much different with the
spectrum.
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