CTC-4 Director 21

[SwizzyMan]

Originally Posted by old_tv_nut

Second this, but seeing it at both demodulators would confirm it.

SwizzyMan, what kind of scope do you have? If it is capable of syncing on a separate signal from the one you are viewing, it's good to know how to do that for future reference. You could sync on the luma, the sync separator stage, or just by putting a probe somewhat near the flyback (not too close!), and then look at whatever you wanted with the other input.

Its a tektronix TAS 220. 20 mhz analog scope, not the greatest but it normally works.