Re: AM/FM on one carrier
- From: John Fields <jfields@xxxxxxxxxxxxxxxxxxxxx>
- Date: Mon, 13 Jun 2005 18:24:07 -0500
On 13 Jun 2005 12:45:17 -0700, pdrunen@xxxxxxx wrote:
>Hi All,
>
>Given that I have a carrier which I can AM modulate and FM modulate, AM
>is max at 100% and FM deviation is +/-5KHz. The FM side and the AM side
>are different signals BW limited to 2.5KHz.
>
>On the other end is a AM only receiver with 10KHz front-end
>and an narrowband FM only receiver tuned to the carrier frequency.
>
>Will the receivers be able to demodulate with the other modulation
>riding the carrier?
---
Since the amplitude of the carrier will be varying because of the AM
and there will be a constant amplitude offset due to the FM, I think
the envelope detection used to demodulate the AM signal will be
successful.
However, since the AM will generate sidebands which will vary in
frequency and mix (?) with the deviating FM, I think demodulating the
FM will be difficult to impossible.
--
John Fields
Professional Circuit Designer
.
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