Ac3
Hello:
If I understand your question, the connector you are using on your sat receiver is orange in color (digital) and you are trying to plug it into analog connections (L/R) on your receiver or TV?...THAT WILL NOT WORK!
If you use the digital output on the sat receiver, you should use a single 75ohm coax cable from the orange plug on the sat receiver to a like connection (orange plug) on your audio receiver (orange plug) and then match the audio receiver's input settings to that input:ie: COAX1 (does not sound like you have optical)
The easiest explanation is follow the color coding of the jacks at all times
if you are going straight to your tv with the sound......the TV needs to have an orange input jack....If not, then you must use the L/R outs on the sat receiver to the L/R inputs on what ever you are connecting to! (standard stereo audio cables ...a red one and a white one)...with the L/R setup, you cannot get AC3!...only stereo
Hope this helps
Jeff