Novatel Car Stereo System ANT A72GA TW N User Manual

3. Attach the antenna to the surface using the four mounting  
screws supplied. The o-ring will compress and create a seal  
between the surface and the antenna.  
L1 ELEVATION GAIN PATTERN  
ANT-A72GA-TW-N Antenna  
USER GUIDE  
dB  
2
1
The ANT-A72GA-TW-N is an active  
antenna designed to operate at the  
GPS L1 and L2 frequencies,  
1575.42 and 1227.60 MHz. The  
antenna is aircraft certified for  
navigation. This guide provides the  
information needed to install and  
use the antenna.  
0
3
4
5
ADDITIONAL EQUIPMENT REQUIRED  
Ref. # Description  
Ref.#  
Description  
• A device with an antenna input port that both receives the RF  
signal and provides 2.5 to 24.0 VDC to the antenna is required  
to set up the ANT-A72GA-TW-N. (NovAtel GPS receivers pro-  
vide the necessary power through their antenna RF connec-  
tors.)  
1
2
3
Antenna  
Countersink screws  
Mounting surface  
4
5
O-ring  
Pre-drilled mounting holes  
4. Remove the dust cap from the antenna’s TNC connector.  
• Coaxial cable with a male TNC connector  
L2 ELEVATION GAIN PATTERN  
5. Attach the male TNC connector of the coaxial cable to the  
antenna’s TNC connector.  
dB  
INSTALLING THE ANTENNA  
Both the input DC power and the output RF signal flow over a  
single coaxial cable connected to the unit's TNC female  
connector.  
1
Ref.# Description  
3
The antenna is attached to a surface by means of an ARINC-743  
Bolt Pattern. Four screws pass through the housing of the  
antenna.  
2
1
Antenna screwed into  
place  
The graphic above shows examples of where the ANT-A72GA-  
TW-N antenna may be located on an aircraft or vehicle (not to  
scale).  
2
3
4
Surface  
TNC connector (male)  
Coaxial cable (female)  
4
0
Install the antenna as follows:  
1. Place the o-ring into groove on the antenna base (o-ring  
supplied).  
ANTENNA CARE  
The ANT-A72GA-TW-N is designed to withstand the elements,  
including rain, snow and dust. However, to ensure your antenna  
performs optimally, keep the radome clean and brush off any ice  
and snow. In addition, ensure the TNC connector remains clean  
and dry and replace the dust cap when a cable is not connected.  
6. Attach the other end of the coaxial cable to the antenna input  
port of the receiving device. The receiving device must be  
able to provide power as detailed in the SPECIFICATIONS  
section of this guide. All NovAtel GPS receivers provide the  
necessary power through their antenna RF connectors.  
Note: User-supplied o-ring grease can be used to hold the o-ring in the  
groove during installation.  
2. Pre-drill the mounting holes and the connector hole on the  
surface. Refer to the Mechanical Drawings section of this  
guide for details on the ARINC-743 mounting pattern.  
 

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