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.
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.
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
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