HAVE A magnavox tb100mw9 for. HAVE A magnavox tb100mw9 for my tvto change from antana to dtv

Question

HAVE A magnavox tb100mw9 for my tvto change from antana to dtv digital to analog converterhave rca4258 universal controllerwill not locate stb code how do i fine code for this new converterlooking for stb code for new Magnavox TB100MW9 Digital/Analog Converter so i can program universal remote control.