MODEL 2810E USER MANUAL
2810E UM
REV 7.0
27
7.
FULL DUPLEX (4-WIRE) - WHAT, WHY AND HOW
Amron has designed the AMCOM Full Duplex (4-WIRE) mode from the ground up, taking
advantage of state-of-the-art electronics technology to provide a superior hard-wire communication
experience. Full Duplex (4-Wire) mode has the following advantages:
•
Up to 285% more signal strength from the diver microphone over the 2-Wire mode using standard
8-Ohm microphones.
•
No push-to-talk required leaving the tender's hands free for other tasks.
•
The diver and tender can hear themselves talk providing a more natural communication
experience.
These advantages produce superior communications and the system is easier to operate by
eliminating the need for using a push-to-talk switch. Another advantage is that the system is easy to
troubleshoot. In fact it is easier to troubleshoot than 2-Wire system once you understand what is
happening. Full Duplex (4-Wire) mode pays off in better communications, something that many of
our competitors have yet to achieve. Better communications means higher diver production, safer
dive conditions and less down time.
WHAT ARE 2-WIRE AND 4-WIRE MODES?
7.1
Now that we have made these claims, allow us to expla
in why and how. First, let’s define
some basic industry terms so that we can all start from the same point.
7.1.1
2-Wire Mode
2-Wire mode is the most commonly used communication mode in the commercial
diving industry. Technically it is defined as a single communication path using a
minimum of 2 wires in a communication cable. Being a single path, there can only
be one talker at a time. Commonly the diver has the priority and the tender listens
as the diver talks. In order for the tender to talk to the diver, this communication
path has to be reversed. This is done by the tender pressing a push-to-talk switch.
This switch activates a set of relays that switch the diver connection to the output
side of an audio power amplifier and the tender connection to the input side. This
allows the tender to talk while the diver listens.
Most diver communication cables, such as the "Army surplus Comm-Cable," have
four wires. These four wires are often separated into two sets of twisted-wire pairs.
In many diving operations, these two sets of twisted-pairs are connected in parallel
for redundancy. A breakage in a single wire in the cable does not cause a loss of
communication, as each wire has a parallel wire to take over. This arrangement is
still a 2-Wire mode even though 4 wires are being used.
Summary of Contents for 2810E
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Page 16: ...MODEL 2810E USER MANUAL 2810E UM REV 7 0 12 DRAWING 2 WIRE CONNECTIONS 4 5...
Page 17: ...MODEL 2810E USER MANUAL 2810E UM REV 7 0 13 DRAWING FULL DUPLEX 4 WIRE CONNECTIONS 4 6...
Page 18: ...MODEL 2810E USER MANUAL 2810E UM REV 7 0 14 DRAWING PUSH TO TALK MICROPHONE CONNECTIONS 4 7...
Page 37: ...MODEL 2810E USER MANUAL 2810E UM REV 7 0 33 FRONT PANEL PARTS LOCATOR MODELS 2810E 2810E 1 8 1...
Page 38: ...MODEL 2810E USER MANUAL 2810E UM REV 7 0 34 CASE PARTS LOCATOR MODELS 2810E 2810E 1 8 2...
