HI Folks,  I just posted three files TCIDtm=3D2 second tiltmeter =
pointing E/W

 TCIDS2=3D2 second vertical spring slinky,

 and TCIDNB=3D22 second nearly balanced pointing N/S

I don't know how to read FFT,  but I am trying to understand it.

To me the TCIDNB maybe over dampened?   I set the Damp, by moving the =
arm 10 mm, releasing it and it moved passed center just a bit and =
returned to center and stopped.   Basically the same way I set the Damp =
on the other two sensors.

I know you need less damp, if you have a longer period.  This one is 22 =
seconds.

All three picked up the 3.3M  Nevada 080315.162234, but the TCIDNB was =
the smallest recording.








HI Folks,  I just posted three =
files TCIDtm=3D2=20
second tiltmeter pointing E/W
 
 TCIDS2=3D2 second vertical spring =

slinky,
 
 and TCIDNB=3D22 second nearly =
balanced pointing=20
N/S
 
I don't know how to read FFT,  but =
I am trying=20
to understand it.
 
To me the TCIDNB maybe over =
dampened?   I=20
set the Damp, by moving the arm 10 mm, releasing it and it moved passed =
center=20
just a bit and returned to center and stopped.   Basically the =
same=20
way I set the Damp on the other two sensors.
 
I know you need less damp, if you have =
a longer=20
period.  This one is 22 seconds.
 
All three picked up the 3.3M  =
Nevada=20
080315.162234, but the TCIDNB was the smallest =
recording.
 
Thanks, Ted