Taking a external antenna mod (any) as high
and clear from interference as posible will
fix pretty much anything.
The signal strength reduces as it passes
through walls and electronic equipment.
Running the antenna outside or to the attic
will give incredible distance for anything
outside. if you run it inside, outside gets
reduced by walls. most houses have
cement/metal outer walls (stuco, aluminum
siding, ect) so, placing the antenna HIGH
(attic or outside) eliminates that
interference.
I bet with the antenna outside you can
achieve 150 - 300+ ft distance on remotes
as the exterior wall give you the most
interference.
also quality of antenna & shilding the
wires to the unit reflects distance of
transmitions.
remember, these units are setup to require
a repeater (sold seperate) to give small
effective areas to reduce outside
interaction from other sources.
X10 isnt coded which allows interference.