The service consists of six channels, the first four having their own individual directors, and the other two providing, respectively, timing and scoring information, and a split screen which shows what is at that moment available on the first four channels. The line up:
Channel One: Basic race coverage, called the Supersignal, which is similar to, but definitely not the same as what you see on analog, free TV.
Channel Two: Verfolgerfeld, or mid field action.
Channel Three: Cockpit, in car camera footage.
Channel Four: Pit Lane, plus replays of race highlights.
Channel Five: Live Timing and Scoring, exactly like what the teams get on their monitors in the pits.
Channel Six: Overview, a four way split screen showing what is being broadcast on channels one through four, with audio from the Supersignal.
A list of countries that have access to this channel can be found here
http://www.planet-f1.com/gp/2001_season/information/tv_coverage.html/f1/ENG. They are the digital channels.
I will look for some more info later.