Scout NAV-6 User manual

NAV-6 GPS Marine Antenna
Operator’s manual
ed. 1.2013
Overview
NAV-6 is an acve GPS and GLONASS antenna especially designed for the
marine environment. It combines the high performance GPS patch antenna
and a 27 dB low noise amplier (at 5V DC) into a compact waterproof
antenna with exclusive design.
NAV-6 enables the required GPS funcon for AIS systems, chartploers, and
other navigaonal devices, and helps boost the recepon signal to the GPS
unit, especially when the GPS receiver doesn’t have a good view of the sky.
NAV-6 minimizes temporary loss of signal during navigaon and maintains
the best possible accuracy by having a lock on the greatest number of
satellites.
NAV-6 is supplied with deck mount, mounng set and a 15 m RG58 cable
with TNC male connectors. Standard 1” x 14 threads for pole mounng.
NAV-6 GPS Marine Antenna
Electrical specicaons
Frequencies GPS/GLONASS (1572 - 1610 MHz)
Impedance 50 Ohm
Polarizaon RHCP
LNA Gain 26dB at 3V, 27 dB at 5V
VSWR <1.2:1
Voltage supply 2,7V - 5,5V
Current 15 mA to 25 mA
Power (max.) 138mW
Operang temperature -40°C to +85°C
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Professional Marine Antennas Made In Italy

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NAV-6 GPS Marine Antenna
Connecon specicaons
Connector type: TNC male
Cable: RG58
Cable length: 10 m
Mounng type
Any surface
Mechanical specicaons and Dimensions
Max. dimensions: 116mm x 110mm x 74mm (H x L x W)
Material: ABS
Weight: 270 g
Colour: White
About GLONASS
GLONASS, acronym for Global Navigaon Satellite System, is a radio-based satellite navigaon system operated by
the Russian Aerospace Defence Forces. It both complements and provides an alternave to the United States’ Global
Posioning System (GPS) and is the only alternave navigaonal system in operaon with global coverage and of
comparable precision. NAV-6 is capable of receiving and processing GLONASS signals.

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NAV-6 GPS Marine Antenna
Antenna installaon
Follow the guidelines below to choose a suitable mounng locaon for the NAV-6.
• The NAV-6 is waterproof, and appropriate for above decksmounng.
• Choose a locaon that provides the most unobstructed view of the sky in all direcons:
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• GPS antennas should NOT be mounted high up a mast, due to the eects of the boat ‘heeling’ on signal
recepon.
• The NAV-6 should be mounted at least 1 m (3 ) away from devices that may cause interference, such as
motors, generators, VHF radio unitsand other transmiers/receivers.
• Select a locaon out of the radar beam. The radar beam will obstruct or prevent recepon of the GPS signal.
• The locaon should be well away from an Inmarsat antenna. Inmarsat transmission will obstruct or prevent
recepon of the GPS signal.
• Mount the NAV-6 as high as possible to keep it free of interfering objects and water spray, which can obstruct
recepon of the GPS signal if the water freezes.
• Pole mounng requires a pole with a 1 inch 14 TPI thread.

NAV-6 GPS Marine Antenna
SCOUT Telecomunicazioni | Via Toscanini 148, 41019 Soliera, Italy
tel. [phone] | fax [phone] | e-mail: [e-mail]
Technical specicaons here included may change without prior noce.
SCOUT is a registered trademark.
Reg. n. 009799602
www.scoutantenne.com
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Professional Marine Antennas Made In Italy
Basic concept of GPS
A GPS receiver calculates its posion by precisely ming the signals sent by GPS satellites high above the Earth. Each
satellite connually transmits messages that include
• the me the message was transmied.
• satellite posion at me of message transmission.
The receiver uses the messages it receives to determine the transit me of each message and computes the distance
to each satellite using the speed of light. Each of these distances and satellites’ locaons dene a sphere. The
receiver is on the surface of each of these spheres when the distances and the satellites’ locaons are correct. These
distances and satellites’ locaons are used to compute the locaon of the receiver using the navigaon equaons.
This locaon is then displayed, perhaps with a moving map display or latude and longitude; elevaon or altude
informaon may be included. Many GPS units show derived informaon such as direcon and speed, calculated
from posion changes.
A good external GPS Antenna is the foundaon of a good GPS Navigaon system. The reasons to need an external
GPS antenna:
• For use in a vehicle where the GPS receiver cannot or will not be placed near a window.
• For use in any place that the receiver doesn’t have a good view of the sky.
• To minimize temporary loss of signal when in a vehicle in moon.
• To maintain the best possible accuracy by having a lock on the greatest number of satellites.
A GPS antenna is a device that helps boost the recepon signal to a GPS unit, whether it is a standalone unit or an
embedded unit. Oen a GPS antenna is used in a situaon where the GPS unit itself is somehow removed from a line
of sight to the sky, as in a car or a yacht, to help the GPS “see” the sky without having to be moved.
Most GPS Devices will came with an internal Antenna with limited sensivity. Also some the internal Antenna & the
GPS Receiver Module will interfere each other and lower the Posion Accuracy.