COMMUNICATIONS

Communications

Communications
AMRON

Two Diver Communications

Amron 2825R-02

Amron 2825R-01 Two Diver Rack Mount Communicator with DSP3 Helium Speech Unscrambler

The Amcom™ II 2825R-02 Two-Diver Rack Mount Communicator with DSP3 Helium Speech Unscrambler (HSU) features hard-wired, two-diver communicators 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.

ENHANCEMENTS

  • High Audio Fidelity

Ultra-low noise, wide band width amplifier circuit combined with noise suppression circuitry produces crystal clear speech. The amplifier’s Automatic Gain Control (AGC) circuit prevents audio signal distortion and enhances speaker protection and audio quality.

  • Extended Battery Operation Time

The audio amplifier card deploys a state-of-the-art, Class-D digital audio power amplifier. It has very low power dissipation, generates minimal heat, and enhances battery life.

  • Ultra-Low Electromagnetic Interference (EMI)

EMI is minimized through spread-spectrum and de-phase control techniques providing for optimum integration with diving systems.

  • Audio In/Out Connections

Audio IN and audio OUT RCA connections are provided for receiving and sending standard audio line-level signals to and from another device. Two rack mount communicators can be interconnected for redundancy requirements or can double the number of users as needed.

Amron 2825R-02
Amron 2825R-02
Amron 2825R-02
Amron 2825R-02
Amron 2825R-02
Amron 2825R-02
Amron 2825R-02
Amron 2825R-02
Amron 2825R-02
FEATURES
  • Helium Speech Unscrambler (HSU) 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.
  • 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 levels can be reduced by up to 17 dB.
  • 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.
  • 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 up on 4-wire mode (full duplex) or 2-wire mode (push-to-talk) or any combination of the two modes for each diver.
  • Communicator comes standard with rear mounted MS connector, providing connections to diver and tender inputs and outputs.
  • 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. See below for other recommended equipment.
  • Battery Condition Indicator – Visual LED indicator of battery condition.
  • Internal charging system with battery back-up allows for simultaneous charging and operation of the unit while protecting the rechargeable battery from being overcharged. Back-up battery automatically supplies power to the audio amplifier when AC power is disconnected to allow for continued operation up to 45 hours.
AMRON 2825R-02
Input Impedance (Each Input): 250 Ω
Frequency Response:300 to 10,000 Hz
Common Mode Rejection:40 dB minimum
Current Drain Maximum Full Volume: 3 amps
Minimum Quiescent:0.190 amps
Output Impedance: 4 Ω
Power Supply Voltage:12 VDC nominal (9 volts minimum - 18 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 Dimensions:7 in. H x 19 in. W x 12.5 in. D (17.8 cm x 48.25 cm x 31.75 cm)
Weight:19.5 lb. (8.8 kg)
DESCRIPTIONPART NUMBERS
Amron Two Diver Rack Mount Communicator wirh Helium Speech UnscramblerAM-2825R-02