Why not test the tiu's dcs signal by putting the channel in fixed mode and using a small test track and a know good engine. Should be able to get a perfect signal... 10
Too many track feeders can also cause signal problems.... Here's an example.. 30 feet of track divided into three 10 foot blocks might yield a signal of 5 & 6s. One set of feeders to the same 30 feet might yield a perfect signal of 10.
In this case other blocks were on the same channel.
Have you tried the "magic bulbs"".at the tiu out put or on a terminal block if using one.
