[mythtv] how do i: have multiple sources on the same tuner?

[Simon Kenyon]

i have a 350 connected to a satellite box
it has my analogue cable looped through it
i control the sat box with lirc
i want to tune some channels from the analogue cable and others from the sat 
box. how do i do this? it seems in the setup it is an either/or situation.

for channels from the cable i want it to tune to the appropriate frequency
for channels from the sat i want it to tune to channel 69 and use the external 
channel changer

can i define two tuners (actually the same tuner) and assign a different 
source to each?

regards
-- 
Simon Kenyon
email:  simon at koala.ie
tel:    +353 1 805 9290
mobile: +353 86 240 0005