its a type of polar mount
linear mount is a mount that uses a linear actuator arm to move the dish about 80 to 100 degrees. It doesnt do a whole 360 like horizon to horizon does(i want one of those though)
i have a 8 foot prime focus dish with a linear mount but the mount doesn't have a offset adjuster and i can't get it set right for dvb....can someone help me...id really hate to have to find another mount?!!!!?!!