Amron Two-Diver Deluxe Portable Communicator with DSP3 Helium Speech Unscrambler REFERENCE ONLY

SKU

OBS-2825A-02

Please contact Amron directly for GSA pricing at 1-877-462-6700.

$0.00

This item number has been replaced by 2825A-12

The AMCOM™ II 2825A-02 Two-Diver Deluxe Portable Communicator with DSP3 Helium Speech Unscrambler (HSU) features hard-wired, two-diver communications for both air and mixed gas diving. The HSU module utilizes the latest in technological advancements. The core of our design incorporates a state-of-the-art digital signal processor to correct raw helium speech to clear, intelligible voice. The improved Treble Boost offers greater control over the amount of gain added to the high frequency portion of the diver’s microphone. The Depth Control can be finely-tuned using a multi-turn potentiometer, providing the tender with better speech quality. The Noise Reduction Filter (NRF) uses a complex Digital Signal Processor algorithm to capture the background noise and reduce it without affecting the divers’ speech.

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Specs

More Information
	This item number has been replaced by 2825A-12 NEWLY DESIGNED ENHANCEMENTS: • High Audio Fidelity Ultra-low noise circuit combined with noise suppression circuitry produces crystal clear speech. Automatic gain adjustment will guard audio signal from distortion, enhance speaker protection and audio quality. Increases bandwidth 47%. • Extended Battery Operation Time Audio amplifier card deploys the state-of-the-art Class-D digital audio power amplifier. Has very low power dissipation, produces less heat, and extends battery life up to 32%. • Flexible Gain Settings The audio amplifier card has adjustable gain settings to accommodate different communication applications and environments. • Ultra-Low Electromagnetic Interference (EMI) EMI is achieved through spread-spectrum and de-phase control techniques providing for optimum integration with diving systems. FEATURES: Helium Speech Unscrambler (HSU) is conveniently installed in the option panel of this portable communicator incorporates a state-of-the-art digital signal processor to correct raw helium speech to clear, intelligible voice. The Depth Control can be finely-tuned using a multi-turn potentiometer providing the tender with better speech quality. Real-time audio processing uses both frequency and time domain technologies for optimized performance over a wide range of depths and background noise. Improved Treble Boost Control feature allows for optimum frequency enhancement and improved intelligible speech from the diver’s voice. The Noise Reduction Filter (NRF) uses a complex Digital Signal Processor algorithm to capture the background noise and reduce it without affecting the diver’s speech. Noise reduction level can be reduced by up to 17 dB Separate channels and volume controls for each diver and tender to accommodate individual earphone and microphone adjustments, equipment variations and individual comfort levels. Divers’ umbilicals can be set to 4-wire mode (full duplex) or 2-wire mode (push-to-talk) or any combination of the two modes for any diver. Ability to use both dynamic and pre-amplified diver microphones with a unique circuit that detects microphone type and automatically adjusts volume levels. Weatherproof push-to-talk microphone for better voice intelligibility topside. For optimum clarity, see Tech Note (below) for other recommended equipment. Internal charger allows for simultaneous charging and operation of the unit while protecting the rechargeable battery from being over-charged. Automatically supplies power to the audio amplifier when AC power is disconnected to allow for continued operation. 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 VDC Nominal (9 Volts Minimum - 16 Volts Maximum) AC Power Operating Range : 90-264 VAC, 50-60 Hz Sensitivity (Input) : 0.5 mV Output Power (RMS @ 4 Ohm Load, 12 VDC) : 10 Watts Audio Battery Life: 31 hours Dimensions: .10 in. H x 9 in. W x 14.5 in. L (25.4 cm x 22.9 cm x 36.8 cm) Weight: 22 lbs. (9.98 kg) INCLUDED WITH COMMUNICATOR: AMCOM™ II 2825A-02 Two-Diver Deluxe Portable Communicator with DSP3 Helium Speech Unscrambler includes: (1) Amron 2405-28 Hand-Held Push-to-Talk Microphone (1) Amron 2890-05 12 VDC Sealed Lead Acid Gel-Cell Rechargeable Battery with Slide terminals (1) Amron 282XA-UM Two-Diver Portable Communicator User Manual AVAILABLE OPTIONS: Amron 2401-28 Deluxe Headset with Boom Mic Amron 2822-28 Remote Walk-and-Talk (4-wire mode) Amron 2821-28 Remote Walk-and-Talk (2-wire mode) TECH NOTE: All communicators will inherently transfer topside noise to the divers when the tender speaks directly into the communicator’s panel speaker. To eliminate background noise at the surface, use the 2405-28 Push-to-Talk Microphone, included with this model. For optimum communications, we recommend purchasing the 2401-28 Deluxe Headset with Boom Mic for topside operation. For tender mobility, use the 2401-28 Deluxe Headset with Boom Mic along with the 2822-28 Remote Walk-and-Talk (4-wire mode) or the 2821-28 Remote Walk-and-Talk (2-wire mode). For wireless tender communications, order the 2825A-03 Two-Diver Portable Communicator with Wireless Tender Option.

Information

This item number has been replaced by 2825A-12

This innovative concept allows our HSU to be the first unscrambler to use both frequency and time domain technologies for real-time audio processing. This state-of-the-art digital design accommodates a multitude of functions ranging from the correction of the diver’s raw helium speech to normal intelligible voice levels, advanced treble boost, and complex noise reduction filters (NRF).

Our deluxe communicator features separate channels and volume controls for up to two divers and the tender so that uplink and downlink paths can be customized for varying equipment configurations and individual comfort levels.

The newest version of the AMCOM ™ II has the same versatile user-interface, rugged durability and great sound quality as its predecessor with several new digital enhancements: (1) High-Audio Fidelity; (2) Extended Battery Operation; (3) Flexible Gain Settings and (4) Ultra-Low Electromagnetic Interference (EMI). The Overview tab outlines the many outstanding features that continue to make this model the most popular and powerful communicator and HSU on the market today.

Resources

ATTACHMENTS

Amron 282XA-UM Two Diver Portable Communicator User Manual REV 3.0

(Size: 405.3 KB)

Amron Panel Cut-Out and Mounting Detail for 28XXA-010 Portable Radios

(Size: 73.4 KB)

Amron Panel MIC Data Sheet Rev 3.0

(Size: 398.5 KB)

FAQ's

Does the noise reduction filter remove all the background noise from the diver's topside audio?

Depending on the settings you’re using, the sound level of the background noise can be reduced by as much as 18 dB.

How can I test for a blown fuse on my Amcom series communicator?

If the unit is plugged into a live outlet and turning on the switch does not cause the AC POWER LED to light up, then the fuse(s) are probably blown. Unplug the unit from the outlet, remove the fuses and check continuity with a multimeter. Replace any fuse that does not show continuity.

Can you stack the banana plugs from the diver's communicator cable so you can have two divers on each diver channel?

Although it may be possible, we strongly discourage such operation. The added workload would cause overheating and stress to the amplifier card. Prolonged use in this condition will eventually cause permanent damage and failure to the amplifier card.

What type of cable do I need to connect my Amron communicator to my Outland video system?

Amron communicators and Outland Technology’s video systems have a RCA Phono Jack. To connect the two systems together, you will need an audio cable with RCA Plugs on each end.

How do I install a new microphone in my Amcom II or III Communicator?

Please refer to the Panel Microphone Installation instructions located in the attachments tab.

Should I use a GFI when operating my radio off AC power?

When operating your Amron Diver Communicator on AC, it is critical to use a Ground Fault Circuit Interrupter (GFCI) or isolation transformer for tender and diver safety. Surges and spikes are common on AC lines found on ships, generated locally, or at the end of long extension cable runs and can exceed 1kVolt. Such surges and spikes can cause the fuse to blow on the amplifier card assembly. The power supply is designed so that such a failure will be isolated and will not cause a safety issue to the tender or divers. It is strongly advised that your Amron Diver Communicator be operated on an AC circuit with a high quality surge arrester or an AC isolation transformer.

Can I operate my communicator while I’m charging the internal battery?

Yes, however, the charger will charge the battery at a slower rate as some of the charger power is being used to operate the communicator.

Can my Amcom communicator work on 240V / 60Hz?

Yes, the unit has an operating range of 90-264 VAC, 50-60 Hz..

When my battery does not appear to be holding a charge, how do I know if the problem is a bad battery or if the charger is broken?

To determine whether the problem is with the battery or charging circuitry, you will need to verify if the battery is being charged.

Troubleshooting:

Unplug your communicator and turn on the POWER switch.
Measure the voltage across the yellow PUSH-TO-TALK (PTT) jack and write down this value for future reference. It should be greater than 9 Volts.
Plug the communicator into an AC source and verify that the AC POWER LED on the front panel turns on.
Re-measure the voltage across the PTT jack and note it down for future reference. It should be higher than the previous measurement.
If the AC POWER LED does not light up when the communicator is plugged in, then check fuse located on the amplifier card.
Allow the communicator to charge overnight.
Unplug the communicator and re-measure the voltage across the PTT jack.
1. If it is the same or less than the voltage you measured previously, then the charger is broken and the communicator needs to be sent in for repairs
2. If the voltage higher than previous measurement but less than 13.5 Volts, then the battery is bad and needs to be replaced.
3. If it is greater than 13.5 Volts but it still appears that the battery is not holding a charge, contact Amron for additional support.

What are the environmental parameters that Amron's comms units can be used in?

Temperature: Class C Ambient Temperatures –25°C to +55°C Humidity: Class A Relative humidity up to 96% at all relevant temperatures, no condensation Vibration: Class A On bulkheads, beams, deck, bridge EMC: Class B All locations including bridge and open deck