connecting tv to decoder
 

I have the creative inspire gd580 speaker system, and i want to connect my tube tv to it. there doesn't seem to be an output on the tv, but i want to know if there is another way around it.

If there's no output on the TV, no. But it depends on what the signal source of your TV is. Do you have a cable or satellite box, or VCR? You can use the output from one of those and would get better quality anyway.

the tv i'd be using has an antenna now, but we will most likely either hook cable up to the RF jack, or get another satellite reciever and have satellite there. so i could use the satellite receiver right?

Use the sat receiver outputs. In the meantime, if you have a VCR, hook the antenna to the VCR antenna/cable input, then use the VCR's left and right audio output jacks.