Linux Ati TV Out on Laptop

Hi, I'm running Fedora Core 2 on a Dell Inspiron 600m and I'm trying to 
get the TV out to work.  When I installed the closed-source ATi drivers 
and configured them, one of the options was to enable TV out, which I 
did and selected the Clone Mode.  Well, I configured the sync rates for 
my primary monitor (the LCD on the laptop) and then it asked me to 
configure the sync rates on the second monitor (the TV out signal).  I 
can't figure out what values I should put in for the Vsync and Hsync to 
get it to work correctly.  The image on my TV is B&W and looks really 
nasty, like I"m going to damage it or something if I keep it running on 
there.  Does anyone know what the Hsync and Vsync ranges should be for 
TV out?  Thanks in advance!

Adam