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 >
