Garmin GMR FANTOM Series User Manual

Minimum Safe Operating Distances
When it is transmitting, the radar should be located in a position on the vessel that is at least this far
from people. IEC60936-1, clause3-27.1, specifies the maximum distances from the antenna at which radio
frequency (RF) levels can be expected.
These minimum safe distances apply for a transmitting radar with a rotating antenna, and are much larger
when the antenna is not rotating. If rotation of the antenna is obstructed for any reason, the transmitter will
automatically turn off.
IMPORTANT: The specified 100 W/m
2
minimum distance must be maintained between the antenna and the
occupational user and the specified 10 W/m
2
must be maintained between the antenna and the general public.
Under such configuration, the radio frequency radiation exposure limits set forth for a population/uncontrolled
environment are satisfied.
Model 100W/m² 50W/m² 10W/m²
GMR Fantom 54 0.12m (4.72in.) 0.17m (6.69in.) 0.38m (14.96in.)
GMR Fantom 56 0.13m (5.11in.) 0.18m (7.09in.) 0.40m (15.75in.)
GMR Fantom 124 0.19m (7.48in.) 0.26m (10.24in.) 0.59m (23.23in.)
GMR Fantom 126 0.20m (7.87in.) 0.28m (11.02in.) 0.62m (24.41in.)
GMR Fantom 254 0.27m (10.63in.) 0.38m (14.96in.) 0.85m (33.46in.)
GMR Fantom 256 0.28m (11.02in.) 0.40m (15.75in.) 0.90m (35.43in.)
Antenna Specifications
Specification Measurement
Type End-fed slotted waveguide
Horizontal beam width
4ft. antenna: 1.8 degrees
6ft. antenna: 1.25 degrees
Horizontal side lobes
-23dB within ±10 degrees of main
-30dB outside ±10 degrees of main
Vertical beam width 22 degrees
Polarization Horizontal
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Garmin GMR FANTOM Series Specifications

General

Range	Up to 72 nautical miles
Antenna Size	4 ft
Radar Type	Solid State
Rotation Speed	24 RPM standard, 48 RPM high speed
Display Compatibility	Garmin chartplotters