Can't get below -46 dB

Luca Bedogni bedogni.luca at
Tue Apr 16 05:35:03 UTC 2013

    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
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