Digitial TV Converter

Question

Thank you for your help! They only give you one black cable with the box with coaxial ends on it and the audio/video cables. I can connect the black one to the antenna adaptor on the tv and the antenna jack on the box. Do I need to buy another cable to hook to the other antenna adaptor that goes to rf cable on the box? Sorry...I'm not good with electronics, cables, etc. Thank you! Robin