I have a laptop and a Dell pc all on the same network as my 6300. Today, I forgot I left the laptop on with CAT and DAX running in the taskbar, but nothing else. Went down to the shack, fired up the Dell and launched Smart SDR 1.8.4. My 6300 started transmitting intermittently for a few milliseconds at a time. It wasn't until I pulled the Cat 5 that the radio settled down. Turned off the laptop, and all's well. There were no other programs running on the laptop that would have keyed the radio remotely other than what I mentioned. Very odd! Any ideas from the brain trust?