Nate, Would just disabling one PTT while the other is txing mean the disabled would think it was transmitting, but not really.
Unless there is some sort of feedback to tell a TNC to wait then its data would be lost. I guess some TNCs have this wait line INPUT allowing one ptt to talk to the other TNC commanding a wait. 73, ron, n9ee/r >From: Nate Duehr <[EMAIL PROTECTED]> >Date: 2007/08/02 Thu PM 12:15:20 CDT >To: [email protected] >Subject: Re: [Repeater-Builder] Connecting Multiple TNCs > >Eric Lemmon wrote: >> Dave, >> >> I'd like to see that article, too. Connecting two TNCs to one radio is >> easy, but allocating the RX and TX functions between two devices is hardly a >> trivial matter. Unless a buffer is used to store outbound data while the >> radio is busy receiving data on the other TNC, collisions will occur >> regularly. This should be interesting! Is this a good idea? >> >> 73, Eric Lemmon WB6FLY > >If using real TNC's and not using "software" DCD... > >One could make up a diode matrix to tie PTT from one TNC to the other's >DCD/COS line as well as the radio, forcing it not to transmit when the >other one is. > >Just a thought. > >I don't like the idea really, but yeah, you could hack it together. > >Nate WY0X > Ron Wright, N9EE 727-376-6575 MICRO COMPUTER CONCEPTS Owner 146.64 repeater Tampa Bay, FL No tone, all are welcome.
