We are using a ZW-C and have the Legacy base connected to 1 of the Common Post of the ZW-C. Those out puts are connected to our TIU, obviously on the input side. While testing our loops yestreday with DCS and signal strength, we were only getting 4's and 5's. However, all TMCC/Legacy functions have been working properly from the beginning of our testing with the Legacy Base wire connected this way, running through the TIU.
We are using an older TIU (not the L version), and have NOT connected the light bulbs to the ditributions blocks yet. We wanted to test it as is, to get a base signal reading before adding any modificaions.
Going to add a light bulb to each channel on the output side and see what happens to the signal quality.
Will then move the light bulb to the distribution block to see if there is a difference in the signal quality, whether its on the TIU output or the distribution itself.
If neither one of those options with the light bulb work, we'll move the Legacy Base wire to the outputs of the TIU and retest signal quality.
Last option, which we will probably do anyway, is swap out the older version TIU to the new version L and remove the light bulbs. Just move the Legacy wire back to the ZW common post and test signal, then move the Legacy wire back to the TIU outputs and test signal.
We need 2 TIU's anyway, so we'll use the newer L version as the primary and the older version for the engine tracks and sidings.