Serial Interface; W Ith O Perational L Imitations - Garmin GNS 480 Installation Manaul

1.3.10.1.2 Antennas With Operational Limitations
The list of TSO-C144 antennas shown in Table 1-2 allow the GNS 480 (CNX80) models to meet TSO-
C146a requirements with the operational limitations specified in the Limitations Section 5.2 of this
manual.
Table 1-2 Antennas With Operational Limitations
Model/Description
Screw Mount,
GA 56A, GPS WAAS
Antenna
ARINC 743 Footprint
GA 56W, GPS Stud Mount ,
WAAS Antenna Teardrop Footprint[4]
Screw Mount,
GA 57, GPS WAAS
and FIS Antenna [5]
ARINC 743 Footprint
A-33, GPS WAAS
Screw Mount
Antenna [3] [6]
Screw Mount,
A-34, GPS WAAS
Antenna [6]
Teardrop Footprint[2]
[1] It is anticipated that there will be no operational limitations when using the GA 35 antenna in
conjunction with a future version of GPS software. Consequently, it is recommended that the GA 35
antenna be used whenever possible.
[2] Same mounting hole pattern as GA 56, but A-34 antenna has a physically larger footprint.
[3] Early production runs of the A-33 were marked with TSO-C129a. This antenna was requalified to
TSO-C144 with no changes to the antenna. A-33 antennas marked with the TSO-C129a identification
are identical to those marked with TSO-C144.
[4] Same footprint and mounting hole pattern as GA 56.
[5] The GPS/WAAS antenna connector is a BNC type. The XM antenna connector is a TNC type.
[6] Compatible on aircraft equipped with SATCOM.
1.3.10.2 See Section 1.3.10.1.1
1.3.10.3 See Section 1.3.10.1.2
1.3.10.4 COM Antenna
The GNS 480 requires a VHF COM antenna meeting the following specifications:
•
Standard 50Ω vertically polarized antenna with a VSWR < 2.5:1
•
TSO C37d, and TSO C38d
1.3.10.5 VHF Antenna
The GNS 480 requires a VHF NAV antenna meeting the following specifications:
• Standard 50 Ω horizontally polarized antenna with a VSWR < 3:1
•
Capable of receiving VOR/LOC/GS (Such as: Comant Industries P/N CI 157P)
•
108.00 – 117.95 MHz (VOR/LOC)
•
328.60 – 335.4 MHz (GS)
•
TSO C34e, TSO C36e, and TSO C40c

1.3.11 Serial Interface

RS-232 Defined in Appendix B - Serial Interface Specifications
GNS 480 (CNX80) Installation Manual
Conn
Mount Style
Type
BNC
BNC
BNC
TNC
TNC
TNC
Antenna Part
Manufacturer
Garmin 011-01154-00
Garmin 011-01111-00
Garmin 011-01032-00
Aero Antenna 575-9
Garmin AT 590-1104
Aero Antenna 575-93
Garmin AT 590-1112
560-0982-01 Rev L
General Information
Antenna Kit
Number Number
010-10599-00
010-10561-01
010-10604-00
013-00118-00
013-00113-00
Additional
Requirements
Operational
limitations in
Section 5.2 of this
manual apply.
1-13