Forum: GNU Radio Re: sending single tone Am modulated using usrp1+wbx

Ok, I will try with an attenuator, but I suppose I can work too(while I 
get
an attenuator) with two antennas setting the proper gain for each one, 
but
now I have the next question: Independently if I work with attenuator or
antennas, why the gain affects the spectrum and shape of the received
signal?

Thanks.

> Ok, I will try with an attenuator, but Isuppose I can work too(while I
> getan attenuator)with two antennassetting the proper gain for each
> one, but now I have the nextquestion: Independently if Iwork with
> attenuator or antennas,whythe gain affects the spectrumand shape of
> the received signal?
>
> Thanks.
>
Without seeing the details, I can't comment in detail.

But as you increase the RX gain, more of the weaker components of the
signal start to rise above the noise floor of your configuration, so you 
can
   see them. As you increase gain further, depending on the strength of
the TX signal, you end up with the amplifier operating in a non-linear
fashion,
   thus distorting the signal.