Testing procedure

Things that may cause "noise" that are actually due to your testing setup:

STB boards not securely attached to chamber. Make sure center screws (ones attaching directly to the chamber, not the nylon stand-offs) are tightened to 14 in. lb's.

Lower bandwidth of 1 Ghz scope to 200 Mhz. This attenuates peak height, but also rejects high frequency noise and reduces the noise level from 55-65 mV to ~11-15 mV.

Super Layer 1

Layer	Wire	Channel	Date	Comments
		U1		This channel presents higher noise level than the other ones, which makes difficult to get a signal with amplitude below 30mV. This behaviour extends to all the first channels of each connector in the board. however, if a high enough trigger level is set in the scope(~40mV), it is always possible to get a signal in these channels.
		U24		Warm Wire: This is a channel that always triggers a fake signal.
		U38		Warm Wire.
		U66		HOT Wire: This is a channel that always triggers a fake signal very often.
		U87		HOT Wire.
		U93		HOT Wire.

The rest of channels not mention here has a similar behaviour between them, with a noise level not greater than ~20mV.

Layer	Wire	Channel	Date	comments
		U15,U21,U28		This Board presents a unusual noise in all the channels. The noise is a big positive spark, which makes difficult the recolection of signals. However, It was possible by setting a higher trigger level in the scope.
		U61		Hot and Noisy. The Cause of the noise is the amplifier used. It turns out that this device is very sensitive to the vibration and movement.