2830A THREE DIVER COMMUNICATOR USER MANUAL
2830A-UM
REV 5.0
20
transceiver models operate at a frequency of 2.40 to 2.46 GHz using frequency modulation.
They have a range of 120 yards (110 meters) with clear line-of-sight.
The remote unit (transmitter/receiver) is housed in a rugged plastic casing that can be clipped
to a belt or slipped into a pocket. A single charge of the NiMH battery from the included AC
adapter is capable of operating (transmitting and receiving) continually for up to 5 hours. In
standby (listen only) mode, the battery will last for up to 8 hours. The standard headset is a
tough over-the-ear single ear muff design with adjustable boom microphone.
Operation of the unit is automatic; speaking into the remote unit transmits a RF signal to the
diver communicator. The diver communicator sends the signal down the umbilical to the
diver. When the diver speaks, the signal is sent up the umbilical to the diver communicator.
The signal is then transmitted as a RF signal to the remote module(s).
IMPORTANT:
When the wireless option is not used, turn the option panel switch to “OFF”.
When option panel switch is turned “ON”, the wireless remote should be “ON”. Otherwise a
static noise may be he
ard through the communicator’s panel speaker as it scans for the
available Remote Wireless Tender.
To operate the unit, turn option power switch to ON, turn remote unit ON/OFF Volume to ON,
set remote unit to Talk Mode (press the Talk Button is once) and plug headset to remote unit.
5.10
HELIUM SPEECH UNSCRAMBLER OPTION /26DSP3
The Helium Unscrambler option is installed into the option panel located on right side of the
communicator. A Communicator with this option accommodates a wide range of operating
depths. This state-of-the-art digital design can accommodate a multitude of functions ranging
from the correction of the diver’s raw helium speech to normal intelligible voice levels,
advance treble boost and complex noise reduction filters (NRF)
Diver radios configured with this option are only supplied with the AC power option. This is
due to the power requirements of the Unscrambler option. The radio can be operated in the
air mode by turning the HSU off.
Amron’s advanced NOISE REDUCTION FILTER (NRF) incorporat
es a complex DSP
algorithm which filters out background noise while allowing the diver’s speech to be clear and
intelligible. Amron NRF automatically captures the frequency spectrum of applied background
noise within the audio frequency bandwidth and reduc
es it without affecting the diver’s
speech.
The Treble Boost Control provides a means of adjustment to enhance the diver’s microphone
performance. The treble boost feature allows for optimum frequency enhancement and
improved intelligible speech from the d
iver’s voice.
The Depth Control is used to change the amount of shift in the frequency of the diver’s voice.
The depth control is advanced as the diver’s depth increases. There is a certain amount of
interaction between the controls, and also a difference between diver voices, therefore it is
necessary to tune the unit to the diver. Intelligibility is the desired result; each operator will
find a combination which works best. The frequency shifting algorithm changes the amount of
correction to the raw helium speech. The Depth Control is a multi-turn control with a locking