DirecTV into DAC into preamp......

If I get the plain vanilla DirecTV service hardware package,does it have a digital pre out? Can I feed the audio(from fm radio stations) to a 16bit dac?

My dac has only one input. Does anyone have any experiences,good or bad,with a box that has three or four inputs,a rotary selector switch,and one line to the input on the dac?

Thank you