Can't get below -46 dB

Stefan Sydow st at metafly.info
Tue Apr 16 10:20:19 UTC 2013


Hi,

-48bB is the theoretical limit for a 8bit ADC.
There are two channels and a bit of filtering but it will not help that
much.

Stefan

Am 16.04.2013 07:35, schrieb Luca Bedogni:
> Hi
>     I have an Elonics 4000 USB receiver, and I-m trying to do some
> measurements on the digital television received power in my area.
> Everything works fine, except that the received power is never lower than
> -46 dB, even on channel which are not occupied. I was expecting to get
> values like -120 dB or something similar, instead in my measurements the
> lowest point in any portion of the spectrum is circa -46 dB.
> 
> Am I missing something?
> 
> Thank you
> Best
> 





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