On 1/7/2023 9:28 AM, José Nunes CT1BOH via wsjt-devel wrote:
I wonder if anyone can confirm this?!
In FT8 if I copy a DX station TX, with only one stream, at -10dB:
* If the station goes F/H with two streams, then the signal of each of
the two streams goes down to -13,01 dB because the energy of one
stream is split by half
* If the station goes F/H with three streams, then the signal of each
of the three streams goes down to -14.77 dB because the energy of
one stream is split by three
Are the two sentences above correct?
No, this is not correct. With two streams, each stream will be weaker
than the one-stream case by 6 dB. See "Important Note for Fox
Operators" on page 9 of the "FT8 DXpedition Mode User Guide":
https://wsjt.sourceforge.io/FT8_DXpedition_Mode.pdf
https://wsjt.sourceforge.io/FT8_DXpedition_Mode_Portuguese.pdf
-- 73, Joe, K1JT
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