GRT Avionics

In my RV7a I have a choice of using, via a switch, my Bendix King Skymap coupled directly to my Trio pro pilot or connecting my GRT GPS to the Trio via ARINC. No matter what settings of the gains I use the performance of the Trio is noticeably worse than directly from the Skymap. Any settings or ti...

I guess I didn't make things clear. I know about the left hand dimmer knob that shares the heading. There is another setting for dimming in the Set Menu, Display Unit Maint... mine was at 255, and I assumed that there is some automatic dimming in it - just like my backup Dynon D-10A and my VP-200. M...

I know this is an old post, but I want to set my screen dimmer up, since I've been doing some night flying. I went into the settings, and found it set to 255. The manual talks about settings between 1 and 8. Am I missing something?
John