not sure about the 3000, but I think it comes standard on it as it does on the 60.
IIRC it is Society of Motion Picture & Television Engineers (anyone?)
The 60 and probably the 3000 can't do shit while it writes smpte, it is used to stripe a tape with the time code ( like a reel to real multi track tape, not your cassette) and then you transmit that track to the MPC and your video device and it is slaved to the tape and all in sync.
You can use it with you're computer, but if you aren't doing video scoring it is pretty useless because the tapes always have some slippage.
You could also stripe an audio track in your computer to sync your MPC, but then you loose a computer output and it is more of a pain to set up than Midi.