Overview
The Analog Gain is an Analog Gate that multiplies its inputs and outputs the result. The equation for the output Redstone signal (O) based on two input Redstone signals (IA and IB) is:
O = IA × IB
Since Redstone operates on signal levels from 0 to 15, the output signal is capped at 15.
Configuration
The inputs are marked with Pin Mark A and can be configured to face any direction for normal Analog Gain by right-clicking the block.
Parallel Analog Gain
The Analog Gain also has a Parallel Gate variant. In this configuration, the output is determined by finding the greatest signal on the Left and Right sides and then multiplying it by the signal on the Back. The equation for the output Redstone signal (O) based on the input Redstone signals (L, R, and B) is:
O = B × max(L, R)
max(L, R) is the greatest signal between the Left (L) and Right (R) sides.
As always, the output signal is capped at 15.