Nate Bargmann wrote: > * Ron Wright <[EMAIL PROTECTED]> [2007 Aug 03 08:48 -0500]: >> Nate, >> >> I looked in my KPC-3+ manual and they do call out a DCD line on both the >> RS232 DB25 connector, pin 8, and also on the 9 pin radio connector. >> However, I cannot find any reference to it in the manual. Probably there, >> but cannot find. Wonder why they could put in a simple chart saying "pin 1, >> does this, lo or high to turn on/off". >> >> In the RS232 spec the pin 8, known as CD, is Receive Line Signal Detector. >> It does take the unit on/off line. >> >> So I am assuming if the CD (DCD here) is in off state then the TNC will not >> do anything including receive or transmit??? > > Perhaps this was dropped in the newer KPC-3 command set, but my old > KPC-2 version 5.0 has this to say about the CD command: > > CD INTERNAL | EXTERNAL | SOFTWARE v3.0 > > ... > > When set to EXTERNAL, the carrier detect is supplied by an external > device, connected to the XCD pin on the radio port.
That's what I remember also... my KPC-9612 is so old, I have no idea what firmware is in it. Last time I checked the internal battery was dead, and it's been sitting on a shelf for years... I have lots better ways to move bits around these days than ham radio... sadly. Nate
