Hello. Dennis. Lets start from the front. When you turn on the G3 system. Does the receiver show a full level on the RF meter? If not, that’s where the problem is. If there is a good signal, then I would say you have an input mismatch between the receiver and the camera. If the camera can take an external microphone, then you should be able to use the G3 with a 3.5mm cable. Test your cables and make sure they are good.
Bob