Noise OID?

I am seeing an issue with noise. Yesterday I had a node go haywire, and loggin in via the ehternet port I was able to watch the noise floor jump from -89 to -102 and then back again. Needless to say the router could not connect to it partner. After about 2 hours. the noise settled down to a solid -99 and then it all conencted again. Another node reported a -94 and then later it reported at -99. I think I need to track the noise to get a feel for what is happening. BUt I cant seem to find an OID for it.

any help?

since the numbers are negative, -102 is far less noise than -89. I see noise levels like -102 that when the antenna is removed.

yes, I undestand how negative numbers work. The point is that when it goes down to -89 I lose my connection, so I am trying to graph the noise so I can see when it happens, if it is gradual or all the sudden. when does it come.. when does it go.