Novatel ANT-A71GLA4-TW User Manual
ANT-A71GLA4-TW Antenna
The ANT-A71GLA4-TW is an
active GPS antenna that
receives the GPS L1 1575.42
MHz frequency, the GLONASS
L1 1602 – 1626 MHz
frequencies and L-band 1525 –
1560 MHz frequencies.
The ANT-A71GLA4-TW is
aircraft certified for navigation. This guide provides the basic
information you need to install and begin using your new
antenna.
ADDITIONAL EQUIPMENT REQUIRED
•
A device with an antenna input port that both receives
the RF signal and provides 2.5 - 24.0 VDC to the
antenna is required for the ANT-A71GLA4-TW. NovAtel
GPS receivers provide the necessary power through
their antenna RF connectors.
•
Coaxial cable with a male TNC connector
INSTALLING THE ANTENNA
Both the input DC power and the output RF signal use a single
coaxial cable connected to the unit's TNC female connector.
The antenna attaches to a surface with an ARINC-743 bolt
pattern. Four screws pass through the antenna housing.
To install the antenna:
1. Install the supplied o-ring into the groove on the antenna
base.
Note: User-supplied o-ring grease can hold the o-ring in the groove dur-
ing installation.
2. Pre-drill the mounting holes and the connector clearance
hole on the mounting surface. See the Mechanical Drawings
section for mounting pattern details.
3. Use the four supplied mounting screws to attach the antenna
to the mounting surface. The o-ring compresses and creates
a seal between the surface and the antenna.
Note: NovAtel recommends thread-locker (not included) on the
mounting screws.
Ref. #
Description
Ref.#
Description
1
Antenna
4
O-ring
2
Countersink screws
5
Pre-drilled mounting holes
3
Mounting surface
4. Remove the dust cap from the antenna’s TNC connector.
5. Attach the coaxial cable’s male TNC connector to the
antenna’s TNC connector.
6. Attach the other end of the coaxial cable to the antenna input
port on the receiving device. The receiving device must be
equipped to provide power as detailed in the
SPECIFICATIONS section of this guide. All NovAtel GPS
receivers provide the necessary power through the antenna
RF connectors.
This illustration provides examples of where the antenna may be
located on an aircraft or vehicle (not to scale).
ANTENNA CARE
The ANT-A71GLA4-TW is designed to withstand the elements,
including rain, snow and dust. However, to ensure that the
antenna performs optimally, keep the radome clean and brush
off any ice or snow. In addition, ensure the TNC connector
remains clean and dry and replace the dust cap when a cable is
not connected.
USER GUIDE
OM-20000135 Rev 1 April 2012
Ref.# Description
1
Mounted antenna
2
Mounting surface
3
TNC connector
4
Coaxial cable