Let's not get to overly excited here the internal tuner is functional, yes, however its ability to tune a decent ratio is not much.
Test here if you're under a 2.4 or perhaps a 2.5:1 the tuner will work and drop it.
I however your antenna is without a tuner higher then 2.5:1 well better fix it first before depending on the internal tuner in the Q900 it has a VERY LIMITED RANGE!
