Installation Manual

Lynx NGT-9000
Installation Manual
0040-17001-01 (Revision W) Appendix D Page D-11
Deviation Notes:
Deviation 6: TSO-C195a. When a heading source is unavailable, ATCRBS and ADS-B traffic are respectively
oriented in a heading and track-up orientation. ACSS believes that removing the ADS-B traffic or ATCRBS traffic
from the data sent to the display when the heading input is not available would significantly reduce the value of the
CDTI’s support in the pilot’s see and avoid responsibilities.
DO-317A ASA AIRB application will send TIS-B traffic display data, with a NACv of 0, as a non-directional track
similar to EVAcq. This is in-line with updates in the next revision of the MOPS (i.e., DO-317B).
DO-317A ASA AIRB application will send TIS-B traffic display data by reporting the most recent non-zero NACv
reading confirmed over a 60 second interval.
The EVAcq and AIRB functions are set to unavailable when ownship position is beyond 85 degrees North or South
latitude. The result is an indication of “Standby” for remote displays. However, for NGT-9000 installations, where
TAS is enabled, the range/bearing based TAS targets are sent to the display.
Deviation 7: TSO-C195b. The ACSS ATCRBS and ADS-B traffic in a track-up orientation when heading source is
unavailable. ACSS believes that removing the ADS-B traffic or ATCRBS traffic from the display when the heading
input is not available would significantly reduce the value of the CDTI’s support in the pilot’s see and avoid
responsibilities.
DO-317B ASA AIRB application will send TIS-B traffic display data by reporting the most recent non-zero NACv
reading confirmed over a 60 second interval.
The EVAcq and AIRB functions are set to unavailable when ownship position is beyond 85 degrees North or South
latitude. The result is a display of “Traffic Unavailable” on Panel mount units and an indication of “Standby” for
remote displays. However, for NGT-9000 installations, where TAS is enabled, the range/bearing based TAS targets
are displayed.
Deviation 8: TSO-C112d, TSO-C166b. For diversity configurations only where the top mounted TAS antenna is
operating as an augmentation to a fully qualified bottom blade antenna. In this given configuration, the NGT-
9000RD+ uses the top directional antenna with reduced 1090MHz gain of minus 5dB as compared to a matched
quarter wave stub.
Deviation 9: TSO-C151c. Class B equipment are not required to include a terrain display. For installers desiring a
terrain display, the Remote mount NGT-9000R does not include a terrain display. If a terrain display is required, the
Panel mount NGT-9000 provides a display.
Deviation 10: TSO-C118a. (In-band Acceptance) Given a valid transponder reply signal in the absence of
interference or overloads, the minimum trigger level (MTL) is defined as the input power level that results in a 90%
ratio of decoded to receive replies. The MTL over the frequency range of 1,087 to 1,093 MHz shall be no greater
than -70 dBm.
Deviation 11: TSO-C118a. (Transmitter RF Power Output) When transmitting at full (un-attenuated) output
power, the peak RF output power delivered to a quarter wave stub antenna will have a minimum RF
power of 50 dBm.
Deviation 12: TSO-C118a. (GPS Altitude Derived Height Above Geoid) Above Ground Level (AGL) height will be
calculated by subtracting local terrain elevation provided by the terrain database from the GPS altitude provided by
the internal GPS receiver.
Deviation 13: TSO-C118a. (Aural Alert for Rotorcraft installations) Aural annunciations will not be
suppressed at any altitude while ownship is “in air”.