Folks,
I am sure I saw/read somewhere that:
The spurious free dynamic range for the Analog Devices AD9467 ADC used
by the Flex 6000 series is 75dB. So, how come they can claim a 3rd
order IMD narrow spaced DR of 108dB?? Well, the digital magic is to
filter and then decimate. That is to say, filter to eliminate aliasing
and then throw away some of the samples.
Sounds crazy doesn't it BUT it delivers about an extra 40dB of dynamic
range in the computer, taking the Flex 6000 series potentially up to
around 115dB.
Bob G3ORY
----Original Message----
From: barry.n1eu@gmail.com
Date: 26/10/2017 10:59
To: "Discussion of Ten-Tec Equipment"<tentec@contesting.com>
Subj: [TenTec] SDR ADC (was: TT Omni vii FS/FT)
Not sure if you were kidding, but 16-bit ADC direct sampling SDR's
work
just fine, a la Flex 6000 series and ANAN. I did some serious
contesting
and low band work on them and was very impressed. The myth of
insufficient
receive dynamic range with 16-bit ADC has been put to rest.
73, Barry N1EU
On Thu, Oct 26, 2017 at 2:44 AM, Dukes HiFi <dukeshifi@comcast.net>
wrote:
> GREAT time to introduce an SDR that really works - an IC-7300 with
some
> front end selectivity and a 24 bit Analog to Digital converter!
>
>
>
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