I bought this Atlas SD-60M from eBay and it said it has a Digitrax Decoder in it, but I can’t identify it. I’ve had it for a while and I think I’ve even run it on my DC track without knowing. I have two questions. 1) If THIS IS a decoder, did I destroy it by running on DC? 2) What will happen if I put it on my NCE PowerCab program track if IT IS NOT a decoder?