No they do not have to be the same brand they have to be the same type.
For example you can an NTSC or PAL tuner from Hauppauge and another one from
ATI,
Then as long as they are both using an antenna, or both using a cable, or
both using and S-Video input then they both have will have the same EPG and
can both work at the same time.
If you are recording one channel and then start watching and then recording
another channel then both tuners are in use so you can not change the
channel you are watching without stopping one of the two recordings.
Jayk said:
so the Tuners need to be the same brand? the both have there own antenna
input and if i set them up one at the time they both pick up all the
channells! but if i try to select a different channel from the one i am
recording media centre asks me if i want to stop recording so i can watch
the
other channel! it is like it does not know there are two devices it can
use!