I personally never get a good jolt off of an intermittent output charger.
I know I know they are supposed to be "safer" and all that jazz, but when my cat is laying there with his tail draped across it and his whole body on the ground I'm just not really impressed.
With a tester I can get a 9.9kv reading on this thing, ever THIRD pulse, (it builds up, first pulse is like 2.2kv, 5.5kv, then 9.9kv - which is my max reading) so if you just barely touch the fence for a second you have a 1/3 chance of getting just a tingle.
My dog, and cat, were not impressed by it because they would just brush up on it and nothing would happen.
Best thing to do is run a ground wire parallel to the hot wire so that the predator practically HAS to touch both wires at the same time.
OR upgrade the fence charger.....I kinda like the older model solid state, that I have that when my same cat walked under the wire with his tail sticking straight up he screached like a bobcat and took off like a bat outta heck. (AND learned to walk over the deck instead of ducking under the fence
)