---
kind: "section"
citation: "47 C.F.R. § 80.771"
title: "47"
number: "80.771"
heading: "Method of computing coverage."
url: "https://uscodex.org/cfr/47/80.771"
---

# §80.771. Method of computing coverage.


Compute the + 17 dBu contour as follows:

- (a) Determine the effective antenna height above mean sea level according to the procedures in [§§ 80.757-80.761](/cfr/47/80.757-80.761.md).
- (b) **Determine the effective radiated power according to § 80,765.** Determine for each radial the distance from the antenna site to the + 17 dBu point of field strength using procedures of §§ [80.765](/cfr/47/80.765.md) and [80.767](/cfr/47/80.767.md).
- (c) Plot on a suitable map each point of + 17 dBu field strength for all radials and draw the contour by connecting the adjacent points by a smooth curve.

## Notes

### Authority

Authority: 47 U.S.C. 151-155, 301-609; 3 U.S.T. 3450, 3 U.S.T. 4726, 12 U.S.T. 2377.

### Source

Source: 51 FR 31213, Sept. 2, 1986, unless otherwise noted.