fill-in area
The area where the coverage contour of an FM translator or booster station is within the protected contour of the associated primary station (i.e., predicted
0. 5 mV/m contour for commercial Class B stations, predicted
0. 7 mV/m contour for commercial Class B1 stations, and predicted 1 mV/m contour for all other classes of stations). [47 CFR
7
4. 1201]