The "data" channels on 586 Mhz are the
DStv-Mobile's DVB-H trial broadcasts. DVB-H is a subset of DVB-T and thus your DVB-T card is picking up the signal. You won't however be able to view these channels as they are encrypted and are only available to those on the DStv-Mobile trial program.
Although it was stated that switch-on would occur on 1st November 2008, it's also been stated that this did not imply any channels would actually be broadcast from 1st November. Those areas capable of receiving DVB-T channels can consider themselves lucky.
The "Business Day" article entitled "
SA begins digital TV trial" is probably the most apt description of the current status, up til now we were in the pilot phase. The article goes on to state that the signal is currently only available in Johannesburg, Pretoria and Durban and that "Digital coverage will be phased in over the rest of the country". It later goes on to mention "The full commercial launch of digital terrestrial TV would only happen in 16 months’ time" due to "delays in finalising the policy".
Due to the fact that South Africa has adopted "MPEG-4" as the standard for it's DVB-T broadcasts, this renders the majority of foreign "DVB-T" capable TV's and set-top-boxes as useless as very few support MPEG-4 (H.264) (most countries with DVB-T broadcasts do so using MPEG-2 compression). Viewers with DVB-T tuners for the PC have it a little better in that they can get the software to perform the MPEG-4 decompression (e.g. using
VLC).
It's worth noting that they gazetted policy regarding DVB-T broadcasts states the set-top-boxes must provide "capabilities to unscramble the encrypted broadcast signal so that only fully compliant STBs made or authorised for use in South Africa can work on the network". Based on comments made in the "
SA to switch on digital TV signal" thread it would appear that the broadcast aren't encrypted at this stage but don't expect this to stay that way. When the broadcasts get encrypted, even viewers with DVB-T tuners for the PC will be locked out (using the relevant CAM may work but it appears that there are no plans for distributable smart cards).
You're not likely to see an extended EPG at this point, at best you may get the "Now and Next" information.