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Installation | HS60 GPS Compass User Guide
which is dependent on the GPS antenna and receiver design (see
below illustration).
• VHF marine radios emit strong harmonics. The 10th harmonic of VHF
radio, in some channels, falls into the GPS working frequency band,
which may cause the SNR of GPS to degrade significantly.
• The radiated harmonic signal strength of different brands/models
varies.
• Follow VHF radio manufacturers’ recommendations on how to
mount their radios and what devices to keep a safe distance away.
• Handheld VHF radios may not provide suitable filtering and may
interfere with the HS60’s operation if too close.
Before installing the HS60 use the following diagram to ensure there
are no nearby devices that may cause VHF interference.
1.5 m radius at
top (minimum)
1.0 m radius at base
(minimum)
Use these minimum
distances to detemine
where to place the
HS60
VHF antenna
HS60 distance from nearby VHF radios
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