any old scope will do, you dont need a fast sweep, in fact since your sweeping the detected signal the scope will prob be looking at 60 cps.
I followed the sams, yes it had me set the traps 1st using a vtvm, then the markers on the curve. The vtvm was wierd is said set for a min reading, but that was odd since it seemed backwards that is the it worked better when set for a max, of course maybe I had it reading a min neg which would have been the highest pos, the the lowest neg. I got confused on that part.
the other thing is how to inject the signal, here I followed the instructions, found a old osc tube, cut a grid pin off (hated doing that) used a tube shield wrapped with some paper to isloate from the tuner built in shield. there was a TP just after the detector (this one used a mutipupose tube, some use a SS diode). this is where I had trouble, since on one of my sets the TP was INSIDE the sheid of the IF coil. I had to remove the shield and use a clip on the TP, it was very critical on placement. The Emerson had a better layout.
dont for get to use an AGC bias, the B&K 415 has 3 adjust bias supplies. just make sure you getting neg at the AGC point. I think I started out with about
-3vdc with respect to ground.
you start the sweep and adj both the RF ouput/sweep/AGC bias all of them until you get the unclipped humps. It takes all 3 and is a real balancing act.
If you clip at all it will give false readings so adj to just the point where clipping stops.
turn on the markers (on the 415 you can turn on several). On my sweep gen there is a phasing adj that lets you center the hump otherwise you may get the end of one and the begin of the other hump.
the Sams should tell you what coil does what, have fun.
I just ended up using the markers for setting the traps rather than the vtvm approach.
When your done, try for grins swapping IF tubes (assuming they are the same of course) and watch how it effects the form. Since gain will always be different you will no doubt see a swap since its almost impossible to the humps to be the exact same size.
If you have analog transmisson on reg stations you may want to touch up the traps by eye if you have interference from adjacent channels.
If you want to see some scope patterns go to my thread on vintage tech on IF alignment.
http://www.videokarma.org/showthread.php?t=246854