The 3.5mm output socket on the SMP-100-00 is a four pole socket that, with the correct cable, is capable of simultaneous analogue and SPDIF output.
Using this cable you will be able to get 2 independent media streams of out of SMP-100-00.
An appropriate cable would be wired as follows and provide three female RCA connectors:
Similar cables are often provided as "Camcorder" composite video cables. These might have different wiring to what is required here. ALWAYS check the wiring of the cable with an Ohm meter!.
If the cable is to be specifically for this unit, does it come with it?