2830A-XX SERIES THREE DIVER
PORTABLE COMMUNICATOR USER MANUAL
283XA-UM
REV 7.0
22
4.4.2
4-WIRE OPERATION
To connect the diver in Full Duplex (4-Wire) mode, connect the communication
umbilical wires to the DIVER MICROPHONE and DIVER EARPHONE jacks as
shown in 4-wire diagram in section 3.7. If the umbilical uses a banana plug, simply
insert the plug into the correct binding post jack. Verify that it is firmly and
completely seated. This may require that the external plastic nut be tightened. If the
umbilical uses bare wire ends, loosen the external plastic nut of the binding post
jack. Either insert the bare end of the wire into the hole in the metal shaft of the
binding post or firmly wrap the wire around the shaft. Tighten the nut until the bare
wire is firmly fastened by the nut. The nut should not be fastened on the insulation
of the wire nor should any of the bare wires touch. The diver microphone will be
louder in Full Duplex (4-Wire) mode than in 2-Wire mode. This can be a significant
advantage when using longer dive umbilical cables.
For communicator models 2830A-09, 2830A-15, 2830A-16, and 2830A-17 that use
5-Pin MS Connectors, connect the pair of microphone wires to Pins A & B, and
other pair of earphone wires to Pins C & D, and ground to Pin E on MS Connector.
Wires should be well soldered to the mating connector.
To use Full Duplex (4-Wire) mode, the tender must use a headset and connect per
the 4-Wire diagram in section 3.9. When not wearing a headset, the tender will
have to use the PUSH-TO-TALK BUTTON to communicate to the divers. The
tender can also use the PUSH-TO-TALK BUTTON to cut off the AUDIO
AUXILIARY INPUT signal from the diver even if the tender is connected in Full
Duplex (4-Wire) mode. When the tender uses a headset, the SPEAKER SWITCH
should be turned off to prevent acoustic feedback.
Acoustic feedback can also be avoided by moving the tender away from the
communicator by using the Amron Model 2822-28 Remote Walk-and-Talk Module
with 25-foot-long cable or the 28B Wireless Tender Option.
NOTE
: Acoustic feedback may occur when operating with a standby diver who
does not have his hat/helmet on. On the 2830A series, this can be avoided by
turning his DIVER MICROPHONE VOLUME control down. This cuts off his
microphone but will enable him to monitor the diver/tender conversation via his
earphone.
4.5
VOLUME CONTROLS (2-WIRE)
4.5.1
Turn power switch to ON, turn speaker switch to ON.
4.5.2
If a headset is available, the tender should use it initially to talk and listen to
himself. If adjustments are required, increase or decrease volume (controls). This
will establish a system volume level.
4.5.3
If a headset is not available, adjust all volume controls to mid-scale. Tender has to
depress PUSH-TO-TALK BUTTON in order to talk to divers. One diver at a time,
the Tender and Diver talk to each other during Tender adjusting volume controls as
below:
Summary of Contents for AMCOM III 2830A Series
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