Installation Planning and Considerations
190-01810-00
GDL 82 TSO Installation Manual
Rev. 5
Page 4-4
4.4 Antenna Requirements
4.4.1 L-Band Antenna
NOTE
Certain types of transponder antennas with thin radiator elements are intended for use at 1030 and
1090 MHz. Evaluate these antennas on a model-by-model basis to determine their suitability as UAT
data link antennas.
The GDL 82 requires the existing L-Band Ultra-High Frequency (UHF) antenna(s) meet the following specifications:
Standard 50 ohm vertically polarized antenna with a VSWR < 1.7:1 at 978 MHz and < 1.5:1 at 1090 MHz.
TSO-C66( ), TSO-C74( ), or TSO-C112( ) antennas that also meet the VSWR specification.
The antenna location should be:
1.
Away from major protrusions.
2.
As far away as practical from openings that can affect the radiation pattern (e.g., landing gear doors, access
doors, etc.).
3.
At least 20 inches from any other transponder, TAS/TCAS, DME, or 1030/1090 MHz antennas.
Table 4-2 Acceptable L-Band Antennas
[1] Not recommended for new installations.
MANUFACTURER
PART NUMBER
MODEL/
DESCRIPTION
CONNECTOR
TYPE
NOTES
Aero Antenna
AT130-16
DME Transponder
TNC
DC Grounded
Comant
CI-100 [1]
DME Transponder
BNC
Open Circuit
CI-100-2 [1]
DME Transponder
TNC
Open Circuit
CI-105 [1]
DME Transponder
BNC
Open Circuit
CI-105-3 [1]
DME Transponder
BNC
Open Circuit
CI-105-16 [1]
DME Transponder
BNC
Open Circuit
CI-110-40-30
DME Transponder
C
Open Circuit
CI-110-41-30
DME Transponder
C
DC Grounded
CI-110-60-30
DME Transponder
C
Open Circuit
CI-110-61-30
DME Transponder
C
DC Grounded
Dayton-Granger
L10-611-( )
L-Band Blade
Varies
DC Grounded
Garmin
590-0052 or
013-00219-00 [1]
A-40
TNC
Open Circuit
590-0051 or
013-00174-00
A-41
TNC
DC Grounded
