Gain: 

Max channel no. in Silena 9418 ADCs is 4096. We want the max channel correspond to just above 70 MeV.

We have the 241Am single source in front of the LEDA and the 3-alpha source in front of the S2. Therefore we want the 5.4856 MeV alpha peak in the LEDA channels and 5.8048 MeV alpha peak in the S2 channels to sit at ~ 300 ch.

To achieve this we put the 3.3 kOhm restsros in the LED and 4.7 kOhm resistors into the S2 amplifiers

Threshold:

All LEDA and S2 amplifiers were initially set at a threshold of 30 mV.

Instructions on how to change the gain and threshold of the amplifiers are in attached file.