2830A-XX SERIES THREE DIVER
PORTABLE COMMUNICATOR USER MANUAL
283XA-UM
REV 7.0
20
4.2
BATTERY CONDITION
4.2.1
POWER ON – BATTERY CHECK
Turn power switch “ON” and observe the LED battery condition indicator. The
battery indicator will display the condition of the battery.
•
“STEADY GREEN” light indicates the battery has sufficient voltage to operate
the unit.
•
“BLINKING GREEN” light indicates the battery is low and will need charging
shortly, three hours of operating time remain.
•
“STEADY RED” light indicates the battery voltage is too low to operate the unit.
Communication should stop.
NOTE
: A battery that has not been used for a period of time will display a higher
voltage state when initially turned on. This will rapidly dissipate. This condition is
known as a surface charge. When the battery is placed under a load the voltage
will fall rapidly. It is a good idea to leave the unit on for five minutes before relying
upon the battery condition indicator.
4.3
BATTERY INSTALLATION
The 2830A series communicators are supplied with a single 12V
DC
gel-cell, sealed lead-acid
battery. To remove and install the battery, remove the four brass thumb screws from the front
panel and lift unit out of the case. Set brass screws aside in a safe place where they won’t be
lost. Set unit on flat stable surface with front panel facing up. Remove two screws on each
side of the chassis. Lift out radio using the handles and set it on its right side (side away from
speaker). The 12V battery is now accessible. Lift out battery and remove color-coded slide
terminals. Install the battery and close unit in the reverse order.
4.4
MODES OF OPERATION
The 2830A series have the ability to operate in either 2-Wire or Full Duplex (4-Wire) with
exception of models 2830A-08, 2830A-09, and 2830A-10 with Inhalation Noise Reduction as
they require to operate in Full Duplex (4-Wire) only. Both the diver and tender can be
connected in either mode and a combination of modes can be used. If either the diver or the
tender is wired in 2-Wire mode, the tender must use a push-to-talk, either the PUSH-TO-
TALK ALL SWITCH or PUSH-TO-TALK JACK, when talking to the diver.
2-Wire
communication is defined as a single communication path, normally the diver is the
priority signal path – tender listens to diver. Signal reversing is accomplished by pushing the
PUSH-TO-TALK BUTTON – diver hears tender. Often times a 4-conductor communication
cable is used with 2 wires tied together as a pair for redundancy, this is still a 2-Wire 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. One disadvantage is that the divers
cannot communicate with each other.
Содержание AMCOM III 2830A Series
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