Here is brief summary of mutr FEE noise study, updated 12/14/2000

Baseline configuration:

S-1: LV, Calib, partial HV
S-2: LV,Calib, HV; all chambers are tied together by default
S-3:LV,Calib, HV; in principle, all chambers are tied together only 
through calibration shield wires.

see:sX-rms-vs-ch-12-14-2k.gif

Impedance cross chassis should be ~1 Ohm, but measured close to ~0 Ohm 
on S1 and S3 (with multimeter). Like to get a better Ohmmeter to figure out 
the problem.

-----LV 
There is correlation between RMS and the number of LV channels turned on, 
an obvious grounding problem on LV system.

see:sX-rms-vs-ch-XX-lvoff-XX.gif

----Arcnet cables
It seems arcnet is also playing a big role in the noise,

see:s3-s12lv-off-arcoff-12-13-2k.gif

----Calibration cables
Didn't see much effect from calibration system

see: s3-s12lv-off-caliboff-12-13-2k.gif

----Chamber
You guess it! Adding more conducting tapes cross disconnected bars/skin 
on any given chamber helped to reduce noise significantly. We reached the 
point that by adding more conducting tape won't help to reduce noise.  

---- analog cables
Need to check all cables. We know bad cable contribute noise. 


---- DCM/TFC and Arcnet cables
Should stay away from chamber and analog cable.