Components of the FSP prototype. Dashed arrows indicate the beam path. Non-labeled connections using solid arrows represent different control, data, and power lines. Typical operating parameters for some of the blocks are annotated in parentheses. The dashed blocks do not belong to FSP. Two extra communication lines, not shown here, are required for synchronizing the spatial or spectral scanning with FSP acquisition, when a filtergraph or spectrograph is used, respectively.