Category II-ILS and 185 microseconds for a localizer of the Facility performance Category ill-ILS.
II. For the dual-frequency localizers, the individual voltage of the 90 Hz modulation on the two carriers shall be zero in the same direction for a period not exceeding 617 microseconds for a localizer of the Facility Performance Category I-ILS, the Category II-ILS and 308 microseconds for a localizer of the Facility Performance Category III-ILS and the individual voltage of the 150 Ha modulation of the two carriers shall be zero in the same direction for a period not exceeding 370 microseconds for a localizer of the Facility Performance Category I-ILS, the Category II-ILS and 185 microseconds for a localizer of the Facility Performance Category III-ILS.
(ｪ｡)The percentage of modulation of the ratio frequency carrier of each of the 90 Hz and 150 Hz tones shall be 20 percent along the course line, and the frequency tolerance shall bc within plus or minus 2 percent.
(ｪ｢)The total harmonic contents of the 90 Hz and 150 Hz modulation naves shall not exceed 10 percent and for a localizer of the Facility Performance Category III-ILS, the total second harmonic contents of 90 Hz modulation waves shall not exceed 5 percent.
(ｪ｣)The percentage of modulation of the modulated waves by the power frequency, the said harmonic and other unwanted frequency components shall not exceed 0.5 percent and the percentage of modulation of the modulated waves by the harmonic of the power frequency which causes the course deviation by giving the intermodulation to the 90 Hz, 150 Hz modulated waves harmonics and the unwanted frequency components shall not exceed 0.05 percent.
