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Page 5-8 400 SERIES MAINTENANCE MANUAL
Rev. C P/N 190-00140-05
Standard Localizer Centering Test Signal
Standard localizer centering test signal is a standard localizer test signal in which the difference in
depth of modulation of the 90 and 150 Hz signals is less than 0.001.
Standard Localizer Deviation Test Signal
Standard localizer deviation test signal is a standard localizer test signal in which the difference in
depth of modulation (ddm) of the 90 and 150 Hz signals is 0.093 +/-0.002.
A NAV +LEFT output voltage of 90 millivolts results.
Standard Localizer Audio Test Signal
Standard localizer audio test signal is a standard localizer test signal to which is added a
1020 Hz signal amplitude modulating the carrier 30%.
Standard Audio Test Signal
Standard audio test signal is an RF carrier amplitude modulated 30% at 1020 Hz.