CSEI is a RF & telecommunications engineering firm; specializing in spectrum analysis including calibrated field measurements for radio, television & wireless signals; cable television technical due diligence and FCC Proof of Performance testing; off-air reception (8-VSB) testing including tower and site analysis (computerized and on-site measurements), and broadband engineering services including optical and RF/AC design & mapping.

CSEI is located in the scenic Loess Hills of western Iowa just outside the greater Omaha, NE / Council Bluffs, IA area.