Ground standards and tolerances.

CFR · 2024-01-01 · US · Title 14

Compliance with this section must be shown as a condition to approval and must be maintained during operation of the SDF. (a) (2) The modulating tones must be 90 Hz and 150 Hz within ±2.5 percent. (3) The identification signal must be 1020 Hz within ±50 Hz. (4) The total harmonic content of the 90 Hz tone must not exceed 10 percent. (5) The total harmonic content of the 150 Hz tone must not exceed 10 percent. (b) (c) (2) The sponsor will also provide additional manufacturer's ground standards and tolerances for all VSWR parameters peculiar to the equipment which can effect performance of the facility in meeting the requirements specified in §§ 171.109 and 171.111. (d) (e) (2) The depth of modulation of the radio frequency carrier due to the 1020 Hz identification signal must be within 5 percent to 15 percent. (f) (g) (h) (i) (j) (2) Course shift alarm: The monitor must alarm and cause radiation to cease, or identification and navigation signals must be removed, if the course alignment deviates from standard alignment by 10 percent or more of the standard course sector width. (3) RF power reduction alarm: The monitor must alarm and cause radiation to cease, or identification and navigation signals must be removed, if the output power is reduced by 3 db or more from normal. (4) Modulation level alarm: The monitor must alarm and cause radiation to cease, or identification and navigation signals must be removed, if the 90 Hz and 150 Hz modulation levels decrease by 17 percent or

official document · source cfr-2024 · id 14:§ 171.111