[Elecraft] Specs KIO3-B internal sound card

[Richard Lamont]

On 20/09/17 05:06, Jim Brown wrote:

>  WSJT-X operates at 48 kHz 16-bit, no matter how exotic your
> sound card, the ~90 dB dynamic rangeand 5 kHz audio BW are more than
> sufficient for the audio I/O for the digital modes used in ham radio.

When operating JT65 or FT8 on HF, and having (as recommended) turned AGC
off and adjusted the K3S's gain to set the level to 30 dB on WSJT-X's
'thermometer' on white noise, I've had strong signals drive the system
over the clipping point on HF. This can occur with either a very strong
local signal or 1000km+ sporadic-E.

IMHO the 16-bit dynamic range of the KIO3B and WSJT-X's internals are
not quite good enough for these fortunately rare occurrences. Another 10
dB would suffice, but achieving it would of course require changing the
whole chain from ADC onwards.

73,
Richard G4DYA