[Elecraft] Using K3 with N1MM and MMTTY

[Joe Subich, W4TV]

 > How do you K3/N1MM users interface the MMTTY engine?

Assuming you are using FSK (FSK D), you need two serial ports.  One
port is used by N1MM Logger for radio control (connected to the K3
RS-232 port),  The other port is the N1MM Logger "Digital" port -
the TxD line drives an open collector transistor connected to the
FSK input on the K3 ACC jack and the RTS line drives an open collector
transistor connected to the PTT line on the K3 ACC jack.

If you are using AFSK A, you can dispense with the "Digital" port
completely and allow N1MM Logger to control PTT using the RTS line
on the k3 RS-232 port (PTT - KEY => rts-OFF or rts,dtr).  In that
case you would connect the computer Line Out to the K3 Line In
and the K3 Line Out to the computer Line In with a pair of audio
cables (or a more capable/advanced interface).

73,

    ... Joe, W4TV


On 2/10/2011 12:08 AM, Joe wrote:
> I also asked this question on the N1MM reflector.  I am using N1MM COM1 port
> to control the K3.  I have N1MM starting the MMTTY engine but it cannot key
> the radio because the COM1 port is already being used to control the radio.
> How do you K3/N1MM users interface the MMTTY engine?
>
> Thanks
>
> 73 Joe K2UF
>
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