Re: High Speed CW issue with dropped characters/delay at high speeds with K3/P3 (Jerry Moore)
Some thoughts and conjecture: Dropped Characters: At the default port speed of 38400 any errors in transmission could possibly result in dropped data rather than a resend depending on error handling..etc.. I've suggested to Marc to re-seat all physical connections in the signal path. Lowering the port speed resulted in no dropped characters. I don't have the gear to actually look at this but it could be caused by something as simple as a bad cable, bent cable..etc.. serial data is pretty simple but doesn't take much to trip it at high data rates. That's why there's usually some error detection/correction going on with some applications. Delay: My thoughts on this are that the P3 is probably polling the radio for status and the K3 interrupts the TX data stream to send status, frequency..etc...The P3 buffers the sending data until the polling cycle completes and goes back to sending. Without a lot more information and gear all of my ramblings are little more that guesses. The Delay could perhaps be affected by prioritizing the traffic, knowing how long a polling cycle takes, and maybe splitting the polling cycle in to smaller, more often sent, bits, rather than a chunk stream. Of course this only currently affects communications where a keyboard is sending high speed characters/CW to the P3 to be sent via the K3. The port speed should support those rates easily but HOW the conversation takes place may need to be tweaked a bit. Fixes for the Dropped Characters may be as easy to fix with a new cable or a shorter one. Just thinking out loud here. I enjoy helping solve technical issues. Jer / AE4PB ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
