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Page vi 400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05 Rev. C
SECTION 5
ALIGNMENT, CALIBRATION, AND TESTING
(continued)
5.7.2.8 Sidetone ........................................................................................................5-18
5.7.2.9 MIC Intercom Test.........................................................................................5-18
5.7.2.10 Receiver Sensitivity.......................................................................................5-18
5.7.2.11 TX Interlock ...................................................................................................5-19
5.7.2.12 AGC Test.......................................................................................................5-19
5.7.2.13 Selectivity (25 kHz Mode) .............................................................................5-19
5.7.2.14 Selectivity (8.33 kHz Mode) ..........................................................................5-20
5.7.2.15 Volume Control (Audio Output) .....................................................................5-21
5.7.2.16 Audio Distortion Test.....................................................................................5-21
5.7.2.17 Audio Frequency Response..........................................................................5-22
5.7.2.18 Receiver Audio Compressor Test .................................................................5-22
5.7.2.19 Squelch Test .................................................................................................5-23
5.7.2.20 Frequency Modulation...................................................................................5-24
5.7.2.21 Com Remote Transfer Input..........................................................................5-24
5.7.3 Navigation Receiver Final Tests ...................................................................5-25
5.7.3.1 Voice/Ident Audio Output Level.....................................................................5-25
5.7.3.2 Voice/Ident Audio Frequency Response.......................................................5-25
5.7.3.3 Voice/Ident Audio Distortion..........................................................................5-26
5.7.3.4 VOR AGC......................................................................................................5-26
5.7.3.5 VOR Audio Sensitivity ...................................................................................5-26
5.7.3.6 Receiver Quieting..........................................................................................5-27
5.7.3.7 Ident/Voice Tone Ratio..................................................................................5-27
5.7.3.8 Harmonic Distortion.......................................................................................5-27
5.7.3.9 VOR Flag Sensitivity .....................................................................................5-28
5.7.3.10 LOC Flag Sensitivity......................................................................................5-28
5.7.3.11 VOR/LOC Composite Test ............................................................................5-28
5.7.3.12 VOR Course Deviation Sensitivity.................................................................5-29
5.7.3.13 Localizer Course Deviation Sensitivity ..........................................................5-29
5.7.3.14 TO-FROM Indicator.......................................................................................5-29
5.7.3.15 Centering Accuracy.......................................................................................5-29
5.7.3.16 Course Deviation Accuracy Test...................................................................5-30
5.7.3.17 VOR OBS Bearing Accuracy.........................................................................5-30
5.7.3.18 Selectivity ......................................................................................................5-30
5.7.3.19 Spurious Response—VOR/LOC ...................................................................5-31