2820A-XX & 2825A-XX SERIES TWO DIVER COMMUNICATOR USER MANUAL
282XA-UM
REV 5.0
1
1 INTRODUCTION AND SPECIFICATIONS
1.1
INTRODUCTION
Congratulations on purchasing the most advanced and powerful portable communicator in
the diving industry! Our engineering team has integrated the latest in digital advancements to
produce the industry’s most intelligible and reliable diver communicators. Our built-in quality
that Amron is known for makes the 2820A & 2825A series the most versatile and durable
communicators anywhere in the world!
The AMCOM II Series is a family of full-featured hard-wired, two-diver communicators. The
AMCOM II is offered in two basic versions. The units are identical except the Model 2825A
series has independent microphone and earphone volume controls for each diver and the
tender. The 2820A series has a single earphone volume control for diver’s volume (down-
link) and a single volume control for the tender (up-link).
All models come standard with a built-in internal charger and can be operated from either a
90-264 V
AC
, internal 12 V
DC
battery, or an external 12 V
DC
power source.
All communicators are supplied with an outdoor weather resistant AC power entry module
located on the case, and country specific locking AC power cord of your choice.
There are options available to fit your application such as DSP3 Helium Speech Unscrambler
and 28B Wireless Tender.
The 2820A-XX and 2825A-XX series has the ability to operate in the 2-Wire and Full Duplex
(4-Wire) mode, as well as both modes being used simultaneously. Full Duplex (4-Wire) mode
is required when using the Inhalation Noise Reduction or Wireless Tender features.
Only Amron offers
Microphone
Auto Detection
that identifies the type of microphone each
diver is using and automatically adjusts for optimum performance. This portable diving
communicator has the ability to work with both dynamic and pre-amplified microphones in
either 2-Wire or 4-Wire modes.
1.2
SPECIFICATIONS
Input Impedance (Each Input) ................................................................................... 250 Ohms
Frequency Response ........................................................................................ 300 - 10000 Hz
Common Mode Rejection .................................................................................. 40 dB Minimum
Current Drain Maximum Full Volume ............................................................................. 3 Amps
Minimum Quiescent ................................................................................................ 0.190 Amps
Output Impedance ........................................................................................................... 4 Ohm
Power Supply Voltage .............................................. 12 V
DC
Nominal (9 V
DC
Min - 16 V
DC
Max)
AC Power Operating Range .................................................................... 90-264 V
AC
, 50-60 Hz
Sensitivity (Input) ............................................................................................................. 0.5 mV
Output Power (RMS @ 4 Ohm Load, 12 VDC) .................................................. 10 Watts Audio
Summary of Contents for 2820A
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