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Hi Edgar.......Or if the receiver is operating in a
linear mode.....then straight addition, but probably only with SSB detection, an
AM demodulater diode is non-linear :-))
If you add the signals coming from the same
transmitter but over slightly different paths which alters the phase at the
receiver, you get fading but this is only obvious is one or both path lengths
changes.
Alan
G3NYK
----- Original Message -----
Sent: Wednesday, September 11, 2013 10:10
AM
Subject: Re: LF: Radio signals
Hi
Non linearity in the first RX stage? Caused by a fault in the stage
or over driving of the stage.Or some very bad corrosion in the joints of the
antenna leads. etc etc. Check your RX, try fitting an attenuator in the
antenna lead or shorten your antenna.
73 es GL Pete M0FMT IO91UX
Hi Group,
What is the mechanism for the
way radio signals combine in the air?
For example
1.There are
two transmitters each sending out the same fixed frequency
sine wave
signal.
2. There are no other signals in space, and no background
noise.
3. There are no propagation factors modifying the
signals.
e.g. buildings, ionosphere layers.
4. Both transmitters
are the same distance from the receiver.
5. Both signals have the same
polarisation.
How have the signals combined when they reach a receiving
antenna at a
reasonable distance from both transmitters?
It the
process addition, multiplication or some other process?
Regards,
Edgar
Moonah,
Tasmania.
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