If the signal to noise ratio is good enough the FT8 tones are clearly
audible.
The S/N numbers for WSJT modes are referenced to a 2.8 kHz bandwidth. An
FT8 signal sounds like a wobbly carrier. Obviously, when trying to copy
a weak CW signal we're more likely to choose 250-400 Hz bandwidth.
73, Jim K9YC
On 6/1/2018 8:13 PM, Neil Zampella wrote:
Considering that FT8 is done with 8-tone frequency-shift keying (8-FSK)
at 12000/1920 = 6.25 baud. I'd like to know how you can get that tone
in CW?
As far as the S/N threshold of the various WSJT-X modes (from the
protocol specs in the WSJT-X user guide):
FT8 : -21
JT4A : -23
JT9A : -27
JT65 : -25
QRA64A : -26
WSPR : -31
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