Ok. Let’s try this again…RCA 9TC240 Alignment

[Yamamaya42]

Originally Posted by Penthode

Unfortunately, the 8600a is not a normal counter. It will not work that way. For it to measure frequency you must reconnect the auxiliary output of the generator. It communicated frequency and the counter input is I believe only able to count lower frequencies.

Please remake the connections as per the diagram and answer the sweep question. We can then proceed from there step by step.

Been going over the big manual a bit, it's rather convoluted.
It looks like it is saying for it to display frequency, it has to plot a curve, with a marker at the top, but I could be reading it wrong.

but there is a lot of info for set up and testing it in there that has to be followed step by step to get it in the right mode it seems.