jotron Tron S-VDR CAPSULE, User Manual

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1.1.1 System description
The COSPAS/SARSAT system was introduced in 1982 as a
worldwide search and rescue system with the help of satellites
covering the earth’s surface. Since the introduction of the system
more than 11200 persons have been rescued by the
COSPAS/SARSAT system. Currently the system consists of 8
different satellites in a polar orbit Constellation. These satellites
cover the entire earth’s surface and receive the emergency signal
from the 406MHz transmitter within the EPIRB. In addition several
geostationary satellites are equipped with a 406MHz transponder.
These satellites are not able to locate the Capsule but will give an
early warning to the rescue forces, minimizing the time from an
emergency occurs till the rescue forces are at the site. Each
emergency EPIRB in the system is programmed with its own
unique code, therefore it is vital that the ships data that is given to
the dealer you obtained your Tron S-VDR CAPSULE, is correct. If
the EPIRB is programmed with serial protocol, it is important that
the EPIRB is registered in the database for each country. This
database is normally located in the same country that the ship is
registered.
1.1.2 Signal detection
When the EPIRB is activated (manually or automatically) it
transmits on the frequencies 121.5MHz and 406.028MHz.A
homing signal is emitted on 121.5MHz and a burst is transmitted
on 406.028MHz every 50 second after activation. This burst
contains all necessary information about the ships in distress. After
the EPIRB is activated, the next passing satellite will detect the
transmitted signal and relay it to an antenna at a ground station,
called a LUT (Local User Terminal). For the 121.5MHz signal the
satellite must be within line of sight of both the EPIRB and a