After the PI Mode activity on Wed night, and after Keita asked me to measure the modes, I went through an exercise of looking at some of the PI Modes (mainly for my own "homework" since I've luckily not had to deal with needing to change filters to damp these out (changing phase has worked for me...and sometimes gains on rarer occassions---perhaps I've been lucky).

While going over the PI Damping wiki (& also having Jim & Nutsinee show me) & went about exploring the frequencies of PI Modes which either (1) have PLL on and/or (2) have a phase value.  For these PI Modes, I looked at:

• "Basic frequency":  This is the number on the PI Overview and is the frequency labeled for each PI Mode
• BP (band pass) filter peak in Bode Plot from Foton:  Looked at magnitude value of transfer function
• BP Notch Value:  This is what was entered for the notch value for the filter in the Command field of the "Design" tab of Foton
• Measurement Today:  This is the value of the PI mode as measured from Terra's DTT template she made for monitoring the PI Modes.

Here's what I recorded: