Newbie Trying to Identify a Component

[Daany]

Hi I am newbie in electronics and mutisim and i have to create a laser circuit that uses a summing amplfier? (Basically i have it on a sheet in front of me and it is a square box with a plus inside, with input and output connections left and right obviously  and an arrow form above aiming down into it)

I cant find this symbol anyway, can anyone help?

[lacy]

Is there any way you could post a picture of what you have? There is a Voltage Summer component under SOURCES>CONTROL_FUNCTION_BLOCKS, but if it has an arrow anywhere on it that sounds to me like current and I don't see any summer/adder for current..

I will post a picture of the Voltage Summer for you to look at.  It would help if we had a picture of it as it may be something different than what I am thinking it is.