I've been using TX TEST for this purpose. Your K3 is probably set up to use DTR or RTS for keying. When the USB enumerator starts up, the first thing it does is reset all the hubs and endpoints, and this causes the serial adapter's DTR/RTS to become asserted, keying the K3. USB may be reset several times, resulting in TX cycles to match.
The only other way of preventing this (that I know of) is to unplug the serial line at the adapter. This shouln't happen on a regular COM port, one that's integrated into the computer. I believe it will *always* happen if there's a USB/serial adapter in line. 73, matt W6NIA On Tue, 25 Jun 2013 17:16:16 +0200, you wrote: >When booting up my PC connected to the K3 it keys the TX several times >during the bootup sequence, I imagine when initialising the various >comports. I need to power up the K3 first before PC boot as I have added LP >Bridge to my PC auto start program list and it wants to see the K3 to >enable the connect port. > >Is there a way to auto inhibit TX keying during PC bootup ( eg. placing the >TX into TEST mode)? > >I believe there must be a way but can't find it as yet. > >Thanks, 73 F5VJC >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:Elecraft@mailman.qth.net > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
