Another reason is that the scanner is very sensitive and will pick up any bleed through from other sources lighting up one bar on the display.

This is enough to trigger the warning on the EVO but it can be overridden to allow you to operate that channel.

I have seen it on a UK set on channel 68. Overridding it allowed the set to work properly with no problems at all.

MPX say it is better to be too sensitive that not sensitive enough!

Gordon Upton