Hickok 246 Bar Generator

[TinCanAlley]

I just noticed something I overlooked all this time. There is a test point on the chassis labeled "C1". It wasn't referenced in the SM, so I figured it wasn't actually used on this set. Today I was looking over the glued on paper inside the set that has a layout of the chassis and note all modules, transistors, etc. In the top corner is a list of the test points not labeled with a tag. It notes C1 as being the test point for "video detector output". Doing some internet searching I've found that this test point allows you to test the signal before it hits the video stages so you can see if noise is there before it hits them. I also found that this TP can be used to inject the signal directly from my generator, but I don't know if it's that simple. If I connect my generator's output to this point, how does it override the IF's signal? If I can do this, I should be able to bring up a raster with the generator and see if my jail bars are from the IF section. Never been able to test that before.