2825R-XX SERIES TWO DIVER RACK
MOUNT COMMUNICATOR USER MANUAL
282XR-UM
REV 5.0
15
system. Since only one person can talk at a time, there is a level of discipline that goes with
using 2-Wire mode in order to obtain clear communication. One advantage of 2-Wire is that
the tender's microphone is not active unless one of the two push-to-talk controls, PUSH-TO-
TALK BUTTON or PUSH-TO-TALK JACK, are active. This eliminates any possible acoustic
feedback between the tender's microphone and the PANEL SPEAKER. It also prevents noise
from the surface reaching the diver and allows the tender to communicate with other
members of the surface crew without involving the diver.
Full Duplex (4-Wire) communication is defined as a dual communication path, a signal path
(a pair of wires) for up-link and a signal path (a pair of wires) for down link. A common
example of Full Duplex communication is the telephone. Full Duplex (4-Wire) has the
advantage of natural communication without having to use the PUSH-TO-TALK BUTTON.
This keeps the tender's hands free to perform other task. It does not require the same level of
discipline to achieve clear communications that 2-Wire does. It has the advantage that
neither the diver nor the tender are cut off when the other is talking. Because the diver's
microphone is not connected in parallel with the earphone, the diver is louder and potentially
clearer in Full Duplex (4-Wire) mode.
4.3.1
2-Wire Operation
To connect the diver in 2-Wire mode, connect the communication umbilical wires to
the DIVER MICROPHONE binding post jack on the communicator as shown in the
wiring drawing in section 3.7. If the umbilical uses a banana plug, simply insert the
plug into the binding post jack. Verify that it is firmly and completely seated. This
may require that the external plastic nut be tightened down. If the umbilical uses
bare wires, 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 earphone connection is not used by the divers. The earphone jacks can be
used to operate a remote speaker. Both diver and tender conversations will be
heard.
When the tender uses a headset or push-to-talk microphone, follow the connection
instruction in section 3.2.1 and in the wiring diagram in sections 3.9 and 3.10.
When using the Amron Model 2821-28 Push-to-Talk Microphone, the tender
presses the push-to-talk button on the side of the microphone and speaks clearly at
a distance of between 1 and 2 inches (25 to 51 mm). When done speaking, the
tender releases the push-to-talk button to allow the diver to communicate.
In 2-wire mode the tender must press the Push-to-talk Switch to be heard. If you
are using the Amron Remote Push-to-Talk, Model 2821-28, the tender may press
the Push-to-talk Switch on the belt module.
4.3.2
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 wiring diagram in section 3.8. If the umbilical uses a banana plug, simply
Summary of Contents for AMCON II 2825R Series
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