I'm not sure I understand the question. If you want to know where to check, tie the grounding clip to ground and put the probe tip on pin two of the chip. If you want to know how to set up the scope in general, set for 1v per vertical division and 0.1 or 0.01uSec per horizontal division. If you want to know how to set up a particular scope, check the user manual. (Many manuals are available online if you have a hand-me-down scope like mine.)
If none of the above addresses your question, then I apologise for my confusion.
it should be a clock signal for a mp3 decoder (STA013 to be exact). Since the chips is not working at this stage (because it depends on something else), i'm just looking for a way to test the clock only. I figure out a way just dunno if it works...
the node 5 actually connected the output of a 2 input AND gate; with its input being a 5Vdc and output of clock (node 2). You think this may work?