Ground Checks (Configuration Mode) - Garmin GPS 400W Installation Manual

5.4 G round Checks (Configuration Mode)
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5.4.1 M ain Indicator (Analog Only)
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If the GNS 400W Series unit is interfaced to an electronic HSI and the main indicator
analog output is not used, this check is not required.
If the GNS 400W Series unit is interfaced to an analog indicator on the main CDI/OBS, perform the
following steps:
1. Go to the MAIN CDI / OBS CONFIG page.
2. Verify correct operation of the lateral deviation, flag and TO/FROM flag using the corresponding
selections.
3. Verify correct operation of the vertical deviation and flag using the corresponding selections.
4. Verify correct operation of the OBS knob using the SELECTED COURSE display. At 30°
increments around the OBS card, ensure that the indicated value is within 2° of the value set on
the indicator.
5.4.2 V OR/ILS Indicator (GNS 430W Only)
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If the GNS 430W unit is interfaced to an analog indicator on the VOR/ILS Indicator output, perform the
following steps:
1. Go to the VOR / LOC / GS CDI configuration page.
2. Verify correct operation of the lateral deviation, flag and TO/FROM flag using the corresponding
selections.
3. Verify correct operation of the vertical deviation and flag using the corresponding selections.
5.4.3 D iscrete Inputs and Annunciator Outputs Checkout
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If the GNS 400W Series unit is connected to external annunciators/systems or external switches, perform
the following steps:
1. Go to the MAIN DISCRETE INPUTS page.
2. For each external switch that is connected, exercise the switch and use the EXTERNAL SWITCH
STATE section to verify that the input is functioning correctly.
3. Go to the MAIN DISCRETE OUTPUTS page.
4. For each annunciator output that is connected to an external system or annunciator, toggle the
output ON (corresponding box is filled/green) and OFF (corresponding box is not filled/blue)
using the DISCRETE TOGGLE field. Verify that the appropriate external annunciator
illuminates when the output is set to ON and extinguishes when the output is set to OFF. If the
output is not connected to an annunciator but provides an input to another system, verify that the
other system receives the signal.
400W Series Installation Manual
190-00356-02
NOTE
Page 5-25
Rev. F