11. It was not until 1987 that WBNR was licensed for 480 watts night time operation with a DA2 antenna pattern . 12. The station broadcasts non-directionally during the daytime, and uses a four-tower directional antenna pattern at night. 13. In 1957, CBAF 1300 kHz had a radiated power of 5, 000 watts and used a single directional antenna pattern . 14. For the realization of this directional antenna pattern two 257 metre ( 835 feet ) tall guyed lattice steel masts are used. 15. With the move came the addition of nighttime power, and the elimination of a directional antenna pattern operation during the daytime. 16. At night, KTWO uses a directional antenna pattern that pushes most of the station's transmitting power to the west. 17. The antenna pattern must be considered because it is costly to change the pattern of a long-wave or medium-wave antenna. 18. The power to the difference antenna pattern ( for systems so equipped ) is not adjusted from that of the P1 and P3 pulses. 19. Thus as the signal " moves " from one antenna to the next, the distortion in the antenna pattern will increase and then decrease. 20. WJMP operated with a maximum power output of 1, 000 watts, using a six-tower, daytime-only directional antenna pattern .
