Non-Garmin Antennas; Supported Non-Garmin Antennas; Section 13 Gps/Xm Antenna Installation (Core G3X Lru) - Garmin G3X Installation Manual

13 GPS/XM ANTENNA INSTALLATION (CORE G3X LRU)
This section contains general information as well as installation information for GPS and XM antennas.
Use this section to mount the GPS/XM antenna(s).
In an installation with multiple GDU 37X units, each GDU can be configured to use its own internal GPS
receiver, or to receive GPS data transmitted by another GDU. A minimum of one GPS antenna is required
for installations using more than one GDU 37X unit, as the GDU 37X will "share" the GPS information
with all GDU 37X units. Additional GPS antennas may be used for redundancy, but are not required. See
Section 17.3.13 for further information.
NOTE
Only a single GPS antenna is required for installations using more than one
GDU 37X unit, as the GDU 37X will "share" the GPS information with all GDU 37X
units.

13.1 Non-Garmin Antennas

Table 13-1 lists non-Garmin antennas currently supported by the GDU 37X. For non-Garmin antennas,
follow the manufacturer's installation instructions. It is the installer's responsibility to ensure that their
choice of antenna meets FAA standards according to the specific installation.
NOTE
The GPS antenna should provide a gain of 16 to 25 dB. The GDU 37X supplies power to
the antenna at 4.5 V–5V with a maximum current of 50 mA.
Model Mount Style
Comant Screw Mount,
2480-201 Teardrop
VHF/GPS* Footprint
Comant Screw Mount,
420-10 XM ARINC 743
only Antenna Footprint
*The GPS antenna connector is TNC type. The VHF COM antenna connector is BNC type.
190-01115-01
Rev. L
Table 13-1 Supported Non-Garmin Antennas
Conn Antenna
Type Type
VHF
BNC
COM,
TNC
GPS
TNC XM
G3X Installation Manual - GPS/XM Antenna Installation
Antenna Part
Mfr
Number
Comant CI 2480-201
Comant CI 420-10
Garmin Order
Number
N/A
N/A
Page 13-1