Garmin G3X Installation Manual page 210

Table 20-3 GPS or GPS/WAAS Antenna Minimum Requirements
Characteristics
Frequency Range
Gain
Noise Figure
Nominal Output Impedance
Supply Voltage
Supply Current
Output Connector
Table 20-4 XM Satellite Radio Antenna Minimum Requirements
Characteristics
Frequency Range
Gain (Typical)
Noise Figure
Nominal Output Impedance
Supply Voltage
Supply Current (maximum)
Operating Temperature Gain
*For each 1 dB gain over 24 dB, add 1 dB of attenuation into the antenna cable path between the
antenna and the GDU.
It is the installer's responsibility to ensure that their choice of antenna meets FAA standards according to
the specific installation. This installation manual discusses only the antennas listed in
antennas may be acceptable but their installation is not covered by this manual.
There are several critical factors to take into consideration before installing an antenna for a satellite
communications system. These factors are addressed in the following sections.
190-01115-01
Rev. AA
G3X/G3X Touch Installation Manual - GPS/XM Antenna Installation
Specifications
1565 to 1585 MHz
16 to 25 dB typical, 40 dB max.
<4.00 dB
50 Ω
4.5 to 5.5 VDC
up to 50 mA
BNC or TNC
Specifications
2332.5 to 2345 MHz
24 dB*
<1.2 dB
50 Ω
3.6 to 5.5 VDC
55 mA
-50 to +85° C
Table 20-2. Other
Page 20-3