Ocean Reef GSM Owner's Manual - page 9
Rel 8.1. October 2009
GSMs
In addition to the above, check that the microphone is installed correctly,
following the instructions above. Try moving the unit near the antenna
transducer on the Digital M105 unit, or the antenna of a GSMs or M101A
unit (about 5 cm/ 2 inches) Press the activation switch, keeping your
fingers on the two On/Off controls. You should hear a "beep" that lasts
about 1 second.
Begin speaking while holding the button down. Any units near your GSMs
should pick up your voice. This test can be carried out without the unit
being immersed in water.
Put on a full-face mask so that it seals properly.
Check that there are no leaks between the edges and your face. The
GSMs speaker should be very close to your ear. Check that the reception
device is not too far from your ear.
Handle the microphone carefully.
Chapter 6
BASIC INSTRUCTIONS
The GSMs and M101A units are activated for reception as soon as they
are immersed in water, and they turn off a few seconds after they dry out.
When they are switched on, this is confirmed by a "beep".
M-101A Model
Listen to your friends who are diving with GSMs units, or those out of the
water, using M105 Digital units.
GSM DAT
TM
(Digital Activation Transmission)
The GSM DAT
TM
unit is equipped with an automatic transmission
activation, which allows the user to speak without keeping the microphone
button pressed down.
To activate the DAT you simply need to push and release the button
quickly, at which point, a series of impulses are sent out keeping the GSM
transceiver automatically on for 30 seconds.
Then it will return to the receiving mode for 20 seconds with a series of
impulses in a different tone from the first. This cycle on 30 – 20 – 30
seconds goes on until the button is pressed again for at least 1 second to
return to the manual mode or until the batteries are exhausted
.
This feature is extremely important in that it allows “hands free”
communication especially in a “diver emergency” or if a diver is
experiencing difficulty.
GSM DC
TM
The GSM DC
™ (code 33122) underwater transceiver unit incorporates
the latest innovation in underwater ultrasonic 2-Way Radio communication;
featuring a digital driver for vocal message equalization, an automatic
system for activating (DAT) transmission and a double transceiver
channel. The GSM DC
™ can be used on the OCEAN REEF Full Face
Masks, preferred, or on other Full Face Masks equipped with a standard
DIN female connection. Underwater communication technology is
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