Ocean Reef M 105 Owner's Manual
M105Digital w/battery level tester | M105D MARINER | oct. 2007 | rel 1.0
COMMUNICATION SYSTEM:
M 105 DIGITAL SURFACE UNIT
W/BATTERY LEVEL TESTER
OWNER’S MANUAL
Table of Contents
3.1 | Operating the M105Digital 8
section 3
1.1 | Introduction 2
1.2 | General 2
1.3 | M105Digital specifications 3
1.4 | Packaging 3
1.5 | M105Digital Functions 4
section 1
2.1 | Battery 5
2.2 | Battery charging 5
2.3 | Low Battery alert 7-
2.4 | Battery level tester 7
section 2
4.1 | Maintenance 10
section 4
5.1 | Transducer 11
5.2 | Hand-bled Microphone 11
5.3 | Placement of the M105 11
5.4 | Talking & Listening 11
5.5 | In the Beginning 12
section 5
Limited Warranty 13
M105Digital w/battery level tester | M105D MARINER | oct. 2007 | rel 1.0
1.1| Introduction
Congratulations! You have just purchased the finest, state-of-the-art underwater
communication system available. The M105 Digital is a compact, ultrasonic, single side
band transceiver designed to allow surface-to-Diver and/or Diver-to-surface throughwater communications.
M105 Digital offers many useful features to ensure user friendly performance. For
example: front panel volume control, panel speaker, heavy duty, water resistance
housing, 12 volts external power accommodations, hand held microphone, audio
output, headset plug in, rechargeable battery, battery level tester and lots more. In
all, the M105 Digital Portable Surface Station is the state of the art in underwater
wireless communication!
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Section 1
1.2 | General
This manual contains information
regarding the M105 Digital Portable
Surface underwater communication
systems.
Section 1 contains a table of
specifications and general discussion of
the function of the M105 Digital.
3
1.3| M105Digital Specifications
Transmitter output power 1/2 watt
Modulation Single Side band, suppressed carrier
Operating frequency 32.768 kHz upper side band
Power 6 volts lead rechargeable
Battery Life 48 hours (receiving only)
External Power (front panel) 12 volt, DC @ minimum of 1 amp | Access via
front panel with ext. power plug (included)
Transducer Piezoelectric type
Squelch Automatic
Volume User adjustable from the front panel
Microphone Hand-held, Push-to-talk, Dynamic, 500 ohm
impedance
Activation Upon connection of transducer cable to M105
and by switch
Housing UK 309 ABS, heavy duty
Control Panel Anodized alloy
Receiver sensitivity Greater than 110 dßv
Automatic Gain Control (AGC)
Transmitter speech frequency
bandwidth 300 - 3300 Hz
Low Battery Alarm 1 beep every 10 seconds when battery level
is below 4.7 volts
Battery level tester Integrated
Housing Dimensions Width: 9"00
Height: 7"85
Depth: 3"40
1.4 | Packaging
>> M105 Digital surface unit
+ rechargeable battery
>> 35" Transducer cable
>> 220 or 110 /6 volts battery
charger
>> External power cable
>> Hand held push-to-talk
microphone
>> Cable/Mic/Antenna
carrying bag
>> Manual
>> Guaranty
M105Digital w/battery level tester | M105D MARINER | oct. 2007 | rel 1.0
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1.5| M105Digital Functions
1 | Volume Control
The volume control will adjust the listening volume from the front panel speaker.
Clockwise will give you bigger volume, counterclockwise, less volume.
2 | Headset Connection
An optional headset may be connected to the M105 Digital. When you plug in the
Headset, the main speaker stops to work.
3 | MIC
This receptacle is used for the supplied hand bled, push-to-talk microphone.
4 | Switch
on /off
5 | Audio Output
By an optional audio output cable it is possible to amplify the receiving audio from the
diver. The cable is equipped with an RCA plug , right to be used in the audio in of VCR
and TV.
6 | Charger or External Power
6 volts rechargeable lead battery plug . When an external 12 volt DC power source is
desired, ensure the source has a minimum of 1 amp. Please use the supplied external
power cable. Adapt the cable end to your power source being sure about the posit ive
and negative connections position.
7 | Xducer
Female bulkhead DIN connector is used to connect the 35' transducer cable. Ensure
power is turned off after transducer is disconnected).
8 | Front Panel Speaker
When the unit is powered up sound will be heard from this speaker.
Volume is controlled via volume control knob .
9 | Battery level tester
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