Garmin GPS 400W Installation Manual page 64

4.5.1.9 APPROACH ANNUNCIATE
When performing approach navigation, the approach annunciator illuminates when approach is active.
4.5.1.10 INTEGRITY ANNUNCIATE
The integrity annunciator illuminates when the GPS receiver detects a position error, or is unable to
calculate the integrity of the position.
4.5.1.11 ILS/GPS APPROACH Output
The ILS/GPS Approach Output sinks 250 mA when:
GPS navigation is selected and either a GPS approach mode is active or 0.3 nm is selected for the
CDI full scale deflection; or
VLOC navigation is selected and an ILS channel has been selected.
This output may be connected to the ILS Engage input of an autopilot or flight director to provide higher
autopilot gain while the 400W Series unit is operating in the ILS or GPS Approach modes of operation.
4.5.1.12 DEMO MODE SELECT
This discrete input may be used to select Demo Mode on the 400W Series unit. A low on this pin at time
of unit power-up invokes the Demo Mode. Demo Mode allows the 400W Series unit to simulate
reception of GPS satellite signals.
Do not connect DEMO MODE SELECT in an aircraft installation.
4.5.1.13 GPS SELECT
The GPS Select Output is driven low when GPS data is being displayed on the CDI/HSI and the ILS/GPS
Approach Output is not active. It is intended for use with autopilots having a GPS Select input (such as
the Bendix/King KAP 140 and KFC 225), so that the autopilot can capture vertical guidance while GPS
data is being displayed on the CDI/HSI.
4.5.1.14 TIME MARK OUT
Time Mark Out is a time reference pulse output once per second, derived from GPS satellite signals.
ANNUNCIATE 'D' AND ANNUNCIATE 'E'
4.5.1.15
These annunciate outputs are used to control compatible traffic systems.
Annunciate D: Self Test
Annunciate E: Operate/Standby
4.5.1.16 COM REMOTE RECALL
This discrete input may be used to scroll through a list of preset COM frequencies. A momentary low on
this pin will load the next preset frequency into the standby COM frequency.
4.5.1.17 AIR/GROUND INPUT
This discrete input may be used to control the air/ground status of the 400W Series unit. When the
airframe is configured for helicopter, the air/ground input is available and can be enabled or disabled.
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Rev. G
CAUTION
GNS 400W Series Installation Manual
190-00356-08