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Re: [Discuss-gnuradio] Does USRP ADC have internal noise (out-of-band) d

From: Matt Ettus
Subject: Re: [Discuss-gnuradio] Does USRP ADC have internal noise (out-of-band) dither?
Date: Tue, 2 Oct 2012 11:06:40 -0700

The ADS62P4x does not have internal dither.  In many RF systems there
is enough gain that natural noise is strong enough to give enough


On Mon, Oct 1, 2012 at 10:14 PM, LD Zhang <address@hidden> wrote:
> Dear Group,
> I need to clarify a very basic feature of the USRP ADC. The question is:
> Does the ADC have internal noise dither when sampling? I looked at the TI
> ADS62P45 data sheet but did not find explicit mention of the noise dither.
> On the other hand, if you read those app notes from Analog Device Walt
> Kester, the noise dither is such a prominent feature that it is almost
> essential to have it in the A-to-D process. From the spectrum I gathered so
> far, I cannot tell. I would think TI should be good on this basic point.
> Could someone clarify?
> Many Thanks,
> LD Zhang
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