A challenging question

Hello everyone,

I have been very impressed by the knowledgeable people who correspond on AudiogoN. I have received a lot of sound advice from several of you already. Thanks!

My question is:

I am using a dCS Purcell D/D upsampler fed into an Elgar D/A converter fed directly into my Krell amplifier. I am able to upsample both the audio track of DVDs and CDs with great sounding results.

I would like to be able to feed the audio portion of my digital cable TV into the Purcell so I can listen to cable TV through my system without adding an analog preamp into the mix.

My cable company supplied a General Instrument digital settop converter, but I don't see a digital output on its backpanel.

How can this be done? Any ideas?

Thanks.