No I can't tell for sure. I do have other non-video additional services identified such as frequency range used for phone and cable modem services. It used to be VOD channels were actually in the CableCard channel map so I also identified them with help of Tivo and PC QAM tuner (they were using 5 dedicated QAMS with 10 channels/QAM). Those are now hidden from CableCard map and I think have been reworked since. Last I checked there were a few frequency slots left that didn't seem to have anything on them, but I really don't have good enough diagnostic tools to pick out SDV channels. I suppose what I could do is rent out a cable box for a month or 2 so I can use its diagnostics to identify where the SDV channels are, but I'm not that OCD yet.