[Ham-Mac] Need help configuring MacTNC

[Lew Phelps K6LMP]

Thanks, Steve!

Making up a cable that provides hardware handshaking solved the  
problem. PK-88 now talks to my MacTNC program just like it's supposed  
to do.

I really appreciate your help. The web site to which you pointed me  
also was very informative.

Lew K6LMP


On Apr 13, 2009, at 7:38 AM, Steve Hellyer wrote:

> Hi Lew,
>
> Have not used one of these in quite a while. Here is the manual...
> http://www.w1ngl.com/radios/pk-88/PK-88%20User%20Manual.pdf
>
> I suspect TNC is not sending anything back because the RTS pin is  
> not asserted.  AKA it's looking for Hardware Handshake not software  
> (X-ON/X-OFF) by default.
> Need to wire that cable with addition of RTS/CTS.
>
> Request to Send (RTS) and Clear to Send (CTS)
> This provides the standard form of flow control for a DTE to DCE  
> link. In this situation all the circuits in the interconnecting  
> cable should be wired pin-for-pin, as shown below:-
>
>
>
>
> Even if you checked RTS and DTR as the lines are connected so it  
> would not make a difference.  That a DB-25 on the back of the PK-88  
> (DCE) and you have a DB-9 on the serial adaptor (DTE).
>
> This should help.
>
> http://www.lammertbies.nl/comm/cable/RS-232.html
>
> 73
> Steve - VA3SPH
>