190-01115-01
G3X/G3X Touch Installation Manual - GPS/XM Antenna Installation
Rev. AC
Page 22-3
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
. Other
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.
Table 22-3 GPS or GPS/WAAS Antenna Minimum Requirements
Characteristics
Specifications
Frequency Range
1565 to 1585 MHz
Gain
16 to 25 dB typical, 40 dB max.
Noise Figure
<4.00 dB
Nominal Output Impedance
50
Ω
Supply Voltage
4.5 to 5.5 VDC
Supply Current
up to 50 mA
Output Connector
BNC or TNC
Table 22-4 XM Satellite Radio Antenna Minimum Requirements
Characteristics
Specifications
Frequency Range
2332.5 to 2345 MHz
Gain (Typical)
24 dB*
Noise Figure
<1.2 dB
Nominal Output Impedance
50
Ω
Supply Voltage
3.6 to 5.5 VDC
Supply Current (maximum)
55 mA
Operating Temperature Gain
-50 to +85° C
*For each 1 dB gain over 24 dB, add 1 dB of attenuation into the antenna cable path between the
antenna and the GDU.