Installation Manual

Table Of Contents
Lynx NGT-9000
Installation Manual
0040-17001-01 (Revision W) Installation Page 2-20
2.3.7.1.1 Directional Antenna Cables
The directional antenna installation is optional and used only for models with Traffic Alert System (TAS)
or TCAS or models with either TAS/Diversity or TCAS/Diversity functionality.
1. The directional antenna requires three cable assemblies; sum (Sigma Port), bit probe (Probe Port)
and difference (Delta Port). Cable attenuation for the sum and difference ports must not exceed 1.5
dB. Attenuation for the bit probe cable must not exceed 6 dB. VSWR, on cables attached to the sum,
bit probe, and difference ports, must not exceed 1.5:1. (See paragraph 1.10.4 for antenna cable
vendors and specifications.)
2. At the antenna, each connector has an identifying color band. To ensure the cables are connected to
the correct port, affix the following marking at the termination points of each cable:
Sum (Sigma) Port The Sum (Sigma) port is the forward antenna connector. It is marked
with a blue band. Fabricate the sum antenna cable with a TNC
connector at each end. Affix a blue marking band on each connector.
At the NGT-9000, the sum port (A4) must be identified with blue
marking.
Bit Probe Port The Bit Probe port (A1) is the center antenna connector. Fabricate the
probe cable with a BNC connector at each end.
Difference (Delta) Port The Difference (Delta) port is the rear antenna connector. It is marked
with a red band. Fabricate the difference antenna cable with a TNC
connector at each end. Affix red marking band on each connector. At
the NGT-9000, the difference port (A2) must be identified with red
marking.
2.3.7.2 Coax Connector Assembly
The number of antenna cables required for installation is based on the model of Lynx NGT-9000. The
basic model has a GPS and omnidirectional (bottom mounted L-Band) antenna connection. Models with
Diversity only have a secondary top mounted L-Band antenna connection. Models with TAS/TCAS have
three directional antenna connections.