Steve,
I would think that most users are aware that they are transmitting
through the 2.7 kHz (or 2.8) filter - after all, they set it up that way
in the menu (and if they did not, they would get a TX FL error message).
So I should think that they would not expect to transmit an audio tone
outside the bounds of that filter.
If the user has configured a wider filter for receive than for transmit,
the "problem" you state should be fairly obvious.
The signal outside the 2.7 kHz bandpass will be significantly weaker
than if it were inside the passband. The soundcard may still be able to
decode it, but I see nothing that really needs any kind of alert in the
manual, it is simply a natural consequence of 'how things work'.
73,
Don W3FPR
zibs wrote:
But in Data A mode, one can expand the receive width out to 4 kHz using the
2.7 kHz filter. If you attempt to transmit below 200 or above 2800 Hz, power
output will drop to zero.
The user needs to be aware when clicking on the waterfall as one can receive
signals on frequencies in which they cannot transmit.
Steve N9SZ
Lyle Johnson wrote:
> Just getting my new K3 working on PSK31 and noticed that it seems to be
> > important to limit the range of the transmit frequency...
I just swept my K3 in DATA A mode.using the LINE IN jack for sourcing
the Tx audio. It is flat from below 200 Hz to higher than 2800 Hz
using a 2.,8 kHz IF filter.
Be sure you don't have TxEQ set to restrict the transmit bandwidth.
TxEQ is active for *all* Tx audio paths in all modes. For DATA A or
DATA AFSK, it should be flat.
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