I have been using dim mode on my 690SE for a while now. I have been trying to find Ka9 false sources around town and can't get Ka max to go in to gear.One day the SE alerts to a Ka tower source and the next day doesn't. As soon as i go in to Bright mode(display) the 690SE falses on Ka band about 30-40% more a day. As soon as i switch back to dim mode the SE is very quiet? I'm going to confirm this by going on a test run with video against these Ka9 sources. Ka max not kicking on until a display button is pushed?