seem like you can confrim that if you feed it a ntsc signal to the video amp (if correct and strong enough anyway).
I have done alignments on color sets with a BK415 did not make things any worse so I guess I did it right.
problems I generally had was not getting a wide enough band pass so had issues getting the traps set (traps often fell well outside of the curve, so could not trap anything. Don't know if the built in markers would work with a CTC4 either. I would prob go with a variable marker and a freq counter for that set.