[Elecraft] K3 & ADAT ADT-200A by HB9CBU

[Philip Covington]

On Wed, Dec 3, 2008 at 6:22 AM, Philip Covington <p.covington at gmail.com> wrote:
> On Wed, Dec 3, 2008 at 12:55 AM, Joe Subich, W4TV

>> I do not believe that any wideband SDR can cope with the
>> instantaneous peaks greater than the ADC rail in the
>> limiting condition (a large number of extremely strong,
>> say greater than -10 dBm,  within the bandpass filter
>> "window.").  While the chance of the instantaneous maximum
>> decreases as the number of signals increases, the average
>> signal level continues to increase at an exponential rate.
>>
>> 73,
>>
>>   ... Joe, W4TV
>
> I can tell you that QS1R can handle multiple 0 dBm signals in or
> outside of the bandpass filter "window", whether you believe it or not
> is up to you.  If you exceed the clipping limit ( +9 dBm with no
> attenuation in QS1R) then that's it - but that is true for the K3's
> ADC also.
>
> --
> Phil Covington
> Software Radio Laboratory LLC
> Columbus, Ohio
> http://www.srl-llc.com
>

A picture is worth a thousand emails, so:

<http://www.srl-llc.com/files/capture12032008_3.png>

multiple sources at ~0 dBm... one source at ~-117dBm...

-- 
Phil Covington
Software Radio Laboratory LLC
Columbus, Ohio
http://www.srl-llc.com