Installation Manual

Table Of Contents
Lynx NGT-9000
Installation Manual
0040-17001-01 (Revision W) General Information Page 1-15
1.4.1 ADS-B Out Fail
The ADS-B Out Fail is a discrete output that provides an indication of when there is a loss of ADS-B Out.
The discrete output is a ground/open type and is able to sink 250mA.
1.4.2 AHRS Input
An optional ARINC 429 input is provided to interface to an AHRS (heading) system in order to provide
data for Enhanced Surveillance (EHS) and ADS-B data.
Note - If interfaced with a WX-500 that has a synchro heading input, which may be used as the heading
(AHRS) input.
1.4.3 Altitude Encoder Input
Pressure altitude input is required on either an RS-232 input port, 11 Wire Gillham Input Port or ARINC
429 Input Port.
1.4.4 Audio Out
One audio out discrete outputs is available that can output a 40 mW signal to equipment with a load of
600 Ohms.
1.4.5 Standby Mode
An optional Standby Mode discrete input is available to place the unit’s transponder into Standby. The
discrete input is a ground/open type with the GND position setting the unit to standby.
1.4.6 Audio Mute In and Out
The Audio Mute In is used to mute all audio outputs coming from the Lynx NGT-9000 and is required if
a CAWS alerting system (i.e. an external TAWS) is installed. The Audio Mute Out is an indication
(lamp) that the unit is being muted. The Audio Mute Out can be connected to other CAWS alerting
systems if required (i.e. TAS or TCAS) that need to mute the traffic system for a higher priority audio
annunciation (i.e. when TAWS is installed).
1.4.7 Audio Acknowledge
Available with Release 2.0 and later, the Audio Acknowledge is used to cancel the audio from a TAWS
or Traffic Aural. It is used only when the optional TAWS, TAS, TCAS, or ATAS functionality is
configured.
1.4.8 RF Suppression Input/output
The mutual suppression input/output meets the hardware characteristics as defined in ARINC 735B
Attachment 8 and is used to provide suppression of L-band equipment on the aircraft. The transponder
uses the signal as an input to inhibit decoding of receiver signals when other equipment on the aircraft is
transmitting. When the transponder transmits, it asserts a positive voltage on the output to provide the
suppression to other systems on the airplane. Avionics equipment that does not meet the ARINC 735B
standard should not be connected to the Lynx NGT-9000 suppression bus input/output