I have searched and found many posts on transmission problems but not a lot of solutions. I have a P3S Out of the box the best I could get was 280m range (should have sent it back right then) After fitting a DBS booster that increased to 500-650m .After posting about the problem we tried relinking etc. then final replace the u.fl to RP-SMA lead to the 5.8hz transmitter as suggested .All this was done very carefully. Now we have a range of 5m(yes that's 5 meters) and I am unable to set the home point. Is there any way to test the transmitter output to find out if that’s where the problem is?