frequncy setup

I have purchased a new handheld Rexon 328S to compliment our network or radios on the race circuit, I have setup the programing as it should be (I think) I can recieve transmitions from the other handsets but when I transmitt there is a high pitched feedback sound only from the recieveing sets, is this because I am not on frequency or is it the CTC setting ? think I need a bit of help here. Thanks guys.:smiley:

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