It could also be caused a power line ( 50 hz in EU) induced AM modulation. It could be power supply ripple on the RF PA, AC modulating the TX audio tones and even RF coupled to the AC lines with a rusty joint and re radiated..
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On 6/17/2022 6:46 AM, Michael Black via groups.io wrote:
That could be aircraft reflection. Just a touch of Doppler.
On Friday, June 17, 2022, 06:39:07 AM CDT, Pietro Molina <pietro@...> wrote:
I never saw this effect: link https://www.dropbox.com/s/5csq20ase8h9xqs/Screenshot%202022-06-17%2012.00.54.png?dl=0
I have often seen a ghost signal with lower intensity, in previous versions, especially off 50Hz. In the decoding panel, however, there was only one line, the ghost images were not reported. This has never happened with such close signals, I think due to noise in my receiver or transmitter.
Not a big deal, but in case of congested band it can be disturbing.