Low-power UHF television signals generally propagate only along
line-of-sight paths between transmitter and receiver. With the
aid of terrain analysis software, an approximation of a UHF
television transmitter's range can be
determined.
The following image depicting the predicted service area of the Brookdale TV Repeater was created using SPLAT! Terrain Analysis Software written by John A. Magliacane, KD2BD.
In this image, estimated path loss between the repeater site and outlying areas are illustrated in various colors, each of which represent a discrete level of signal strength (path loss). A legend at the bottom of the map defines the path loss (in dB) represented by each color considering the operating frequency (439.250 MHz), antenna polarization (horizontal), and a receiver antenna height of 30 feet above ground level. The path loss indicated in this analysis is the highest expected 50% of the time in 50% of the locations indicated.
Assuming a receiver noise figure of 2 dB and a receiver antenna gain of 17 dBi (22 to 25 element yagi), P5 reception is possible in the green, pink, cyan, and yellow regions immediately surrounding the repeater site. Medium violet represents P4 to P3 reception quality, and P2 to P1 quality is possible in the orange regions.
Best coverage appears to be to the north-northeast and the south of the repeater site with some additional coverage to the west and southwest toward the hills of Marlboro and Freehold, and out over the Atlantic Ocean.
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