Can't get below -46 dB

Luca Bedogni bedogni.luca at gmail.com
Wed Apr 17 05:13:17 UTC 2013


Thank you

So, If I want to get the real power on the channel, what should I do?
Basically when I get like -46/-47 dB I'm getting only noise, right?

Thank you very much

--
Luca Bedogni
Academic: http://lbedogni.web.cs.unibo.it
Photo: http://www.lucabedogni.it


On Tue, Apr 16, 2013 at 12:20 PM, Stefan Sydow <st at metafly.info> wrote:

> 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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