16
Y1-03-0157 Rev. T1
3.7
INTERNAL GPS
3.7.1
The
GlobalFix™ 406
is fitted with an internal Global Position-
ing System receiver that will determine the navigational coordi-
nates, latitude and longitude, of its position on the globe to be
transmitted to the emergency system. When the
GlobalFix™
406
is turned ON, the GPS is immediately turned ON and it
immediately begins acquiring data. Initially the red LED, Light
Emitting Diode, flashes once per second to indicate the
Global-
Fix™ 406
is turned ON and operating. As soon as the GPS
receiver acquires good navigational data the red LED stops
blinking and the green LED flashes once per second to indicate
that the internal GPS receiver has acquired good navigational
data. Once good navigational data has been obtained the GPS
receiver waits for 20 minutes before looking for new naviga-
tional data again. If for any reason a time period of 4 hours
passes without the GPS receiver being able to update the last
good set of navigational data, the message transmitted by the
GlobalFix™ 406
will revert back to default data. At this point
the green LED will stop blinking and the red LED will flash
once per second. If at any time after this, good navigational
data is obtained, this data will be transmitted, the red LED will
stop blinking and the green LED will flash once per second.
4.0
MAINTENANCE
(Check antenna for tightness)
4.1
At least every ninety days, the float free mounting bracket and
GlobalFix™ 406
EPIRB should be inspected for deterioration
and/or buildup that may affect the function of the beacon or
automatic release.
Also carefully inspect the EPIRB case for any visible cracks.
Cracks may admit moisture, which could falsely activate the
beacon or otherwise cause a malfunction. Any cracking ob-
served should be immediately referred to ACR for evaluation,
(1-800-432-0227 Ext. 112)
4.2
Clean the beacon and the mounting bracket to remove residue
buildups. It is recommended that the mounting bracket be
waxed with a high quality marine wax.
9
Y1-03-0157 Rev. T1
1.6.2
Specifications
406 MHz Transmitter
Frequency
406.025 MHz
Frequency Stability
±2 parts per billion/100ms
Output Power
5 watts
Digital Message
Format
Serialized
1
Duration
520 ms
Rate
400 bps
Encoding
Biphase L
Modulation
±1.1 radians peak
1
Leaves ACR with Serialized U.S. code but can be reprogrammed at a
Service center to Maritime MMSI.
121.5 MHz Transmitter
Frequency
121.5 MHz
Frequency Tolerance
±50 ppm
Output Power
25 mW PEP
Modulation
Type
AM (3K20A3X)
Sweep Range
400 to 1200 Hz
Sweep Rate
3 Hz
Duty Cycle
37.5%
Antenna
Frequency
406.025 & 121.500 MHz
Polarization
Vertical
VSWR
Less than 1.5/1
Xenon Strobe
Light Color
White
Output Power
0.75 effective candela
Flash Rate
20—30 per minute
General/Environmental
Battery Life
Operating
48 hours minimum
Replacement Interval
5 years
Size
EPIRB less Antenna
9.0" (22.86 cm)
Antenna
7.5" (19.05 cm)