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An engineer must design AP placements for a new branch office that contains two floors. The engineer uses Ekahau to complete the predictive survey. To calculate the signal bleed through between floors, the engineer creates a building, adds the floors, and attenuation areas. After the scale is set, what else must be added on the floors to accurately measure the signal bleed at a specific location?
In Ekahau Site Survey's multi-floor predictive modeling workflow, alignment points are the critical mechanism that allows the software to understand the precise vertical spatial relationship between floors in a multi-story building. Once floor plans are imported with their scale correctly defined, alignment points must be placed on each floor at the same real-world physical location --- such as a stairwell corner, elevator shaft, or structural column --- so that Ekahau can accurately calculate vertical signal propagation and inter-floor RF bleed. Without alignment points, the software has no spatial reference to determine which area on Floor 2 is directly above a given point on Floor 1, making floor-to-floor signal bleed calculations geometrically impossible. Drawing coverage areas (Option A) is a post-AP-placement activity. Starting the auto planner (Option B) would attempt to place APs without the required spatial reference. Choosing AP models (Option D) is a subsequent step. Alignment points are a fundamental requirement for any predictive survey involving multi-floor buildings. Reference: WLSD Study Guide --- Ekahau Predictive Survey Methodology, Multi-Floor Building Configuration, Signal Propagation Modeling.