Leigh,

I understand about RS232 for keying the rig and that is a nice feature of 
Fldigi, however, that doesn't accomplish direct FSK keying which takes us back 
to the OP's original desire (I think)

As far as cocoaModem using RS232 rig control, I wouldn't really want it to 
since I have either MLDX or RUMlog connected to my radio and of course can have 
only one program using the RS232 port.

The difference, of course, with Fldigi is it's also the logger but I don't use 
it as such.

Rick
K6LE

On 2/8/2010, at 9:38 , Leigh L. Klotz Jr WA5ZNU wrote:

> 
> Thank you, Rick.
> 
> You can configure fldigi to use RS232 commands for TX and RX control, 
> and the K3 has built-in transformer isolation so you don't need an 
> interface to run, just two shielded audio cables with 3.5mm plugs and an 
> RS232 9-pin straight-through cable.  FSK D would also require the same 
> RS232 cable.
> 
> I'm surprised cocoaModem hasn't got RS232 rig control yet; it's pretty 
> simple to implement for the K3.  (You literally just send "TX;" and "RX;" )
> 
> Leigh/WA5ZNU
> 
> On 02/08/2010 09:20 AM, Rick Prather [via Elecraft] wrote:
>> I don't know about the OP's requirements but to me the advantage of 
>> being able to use the FSK D mode would be the ability to run FSK 
>> without and interface.
>> 
>> Presently I am running both Fldgi and cocoaModem and they both work 
>> great in AFSK modes so I guess it's not a big deal to me.
>> 
>> BTW, one of the reasons I run cocoaModem instead of Fldigi on RTTY is 
>> the ability to watch both the Main and Sub receivers on a waterfall 
>> and line up the next contact while waiting to finish another.
>> 
>> 
>> Rick
>> K6LE

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