I think I got it. Note the B&K 415 outputs a 41.67mc vs 41.75mc marker. I maybe could try to reduce the 47.25mc marker as it is not quite at zero. The peak to peak signals at each test point is still an interesting element as changing the amount of signal from the B&k 415 going into the tuner does change the response curves. I might try to measure the tv when it is normally running to see what I get.
C1
C2