I have some digital logic going on(basically 3 ic's that convert a "truth table" to another one). It consists of an xor, and, and invertor wired up relatively simply.
In any case on the AND ic, an 74HCT08, I get what looks to be like a differentiated signal that sometimes works and sometimes doesn't(in that it gives the correct result and sometimes the differentiated result).
It almost certainly is the probe but I'm not sure why. If I move the probe slightly it sometimes works or doesn't. The other probe works fine. I haven't switched the channels to test because 99% likely the probe(if it was the scope then it shouldn't react to position).
What could be wrong with the probe to cause it to act like that?