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
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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