IFR NAVAIR NAV-750

NAVAIR 17—2OAX—737
4.9.5 Set the TI TO—FROM switch to the FROM position.
4.9.6 Verify that the navigation indicator T/S indicates 180.00° ±0.05°.
4.9.7 Set the TI TO—FROM switch to the TO position, and press the 180° VORbearing select
pushbutton. Ensure that the TI bearing display indicates 180°.
4.9.8 Verify that the navigation indicator T/S indicates 180.00° ±0.05°.
4.9.9 Setthe TI TO/FROM switch to the FROM position.
4.9.10 Verify that the navigation indicator T/S indicates 000.00° ±0.05°.
4.9.11 Press the TI 90° bearing select pushbutton, and set theTO/FROM switch to the TO position.
Ensure that the TI bearing display indicates 90°.
4.9.12 Verify that the navigation indicator TIS indicates 90.00° ±0.05°.
4.9.13 Set the TI TO/FROM switch to the FROM position.
4.9.14 Verify that the navigation indicator T/S indicates 270.00° ±0.05°.
4.9.15 Setthe TI TO/FROM switch to the TO position, and press the 270° VORbearing select
pushbutton. Ensure that the TI bearing display indicates 270°.
4.9.16 Verify that the navigation indicator T/S indicates 270.00° ±0.05°.
4.9.17 Set the TO/FROM switch to the FROM position.
4.9.18 Verify that the navigation indicator T/S indicates 90.00° ±0.05°.
4.9.19 Disconnect the navigation indicator T/S from the TI.
4.10 LOC CENTERINGTEST
4.10.1 Connect the DMM voltage input to the TI DEMOD connector. Setthe DMM forautoranging
ac rms voltage measurements, as applicable.
4.10.2 Set the TI controls as follows:
FREQUENCY MHz switches to 108. 100
LOC-G/S switch to LOC
LOC DDM switch to 0
G/S DDM switch to 150 Hz
MASTER MOD control to CAL (UNCAL lamp off)
1020 Hz indent tone MOD control to CAL (UNCAL lamp off)
4.10.3 Record the 150 Hz DEMOD voltage as indicated on the DMM.
4.10.4 Set the TI G/S DDM switch to 90 Hz.
4.10.5 Record the 90 Hz DEMOD voltage as indicated on the DMM.
19