[Elecraft] RE: K3 - should data via the RS232 cable work?

[Robert Benedict]

Leigh

Thanks for the response.

you wrote:
> I have found a number of confusing issues with the DATA A filters. I 
> report them to k3support, and eventually they will get fixed. (Some 
> have already.) If you have reproduceable cases, you can write down the 
> details and send them in.
I turned these in and the "Line In" problem. Elecraft acknowledged 
digital problems. Communication seems difficult on these issues. The 
"Line In" got fixed but the rest are waiting for attention. The "CWT 
kills digital TX" is the only new factoid.
> In the lates release, it seems you can avoid the 1KHz Fc in DATA A by 
> using low/hi instead of center/width.
I don't have any problems with Data Mode A, except that Dual PB stops 
all receive signals. The 1 KHz problem I see is on INPUT to the line in 
in AFSK mode. It appears that the mode only accepts audio in at around 1 
KHz.
> On the laptop trigger mode, you might try setting VOX. With RTTY done 
> as AFSK, the duty cycle is 100% and I would think that VOX, if they 
> allow it, would work fine. I have heard incidental reports that VOX 
> works in PSK mode which has a 50% duty cycle for its idle tone, and 
> higher for data.
The problem is not in triggering, but in sending FSK RTTY mark and 
space. FSK D mode seems to be the only mode that can use Dual PB. That 
mode does not accept audio in. You must either send text with the KY 
command, key morse code or connect a PC’s I/O line to the “FSK IN” line 
on the K3’s AUX I/O connector. (If this signal originates from an RS232 
port, it will require RS232-to-TTL level conversion.)

I was hoping that Simon would add keyboard RTTY in addition to keyboard 
CW to DM780.

Bob
KD8CGH
KX1, K2, K3 and counting