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Service Questions
- Overview
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Features
- Real-time audio processing uses both frequency and time domain technologies for optimized performance over a wide range of depths and background noise
- Treble Boost Control provides means of adjustment to enhance the commercial diver’s microphone performance
- Treble Boost Control feature allows for optimum frequency enhancement and improved intelligible speech from the commercial diver’s voice
- The Depth Control increases or decreases the diver’s depth algorithm changing the amount of correction to the raw helium speech
- Mode Switch allows for two choices of operation
- Mode A is typically used for shallow depths with lower concentrations of helium
- Mode B is used for deeper depths requiring higher concentrations of helium
- Advanced Noise Reduction Filter (NRF) incorporates a complex DSP algorithm which filters out background noise while allowing the commercial diver’s speech to be clear and intelligible
- Noise Reduction Filter has four adjustment levels for the reduction of background noise in both depth modes A and B
- Mode A, simply toggle the mode switch from A to B and back to A - Each time a toggle cycle is completed, the filter will advance to the next level
- Mode B, simply toggle the mode switch from B to A and back to B - Each time a toggle cycle is completed, the filter will advance to the next level
Specifications
- Audio Power Output: 22 Watts per channel
- Frequency Response: 300Hz to 12kHz
- Isolation Transformer: Split Bobbin Medical Grade
- 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)
- Power: 110/220VAC 50/60 Hz (automatic sensing), or Internal/External Batteries 12VDC
DSP2 Helium Speech Unscrambler Radio - 2-Diver - Portable - Rechargeable with Internal Charger: Part Number 2825A/24/26DSP2 Includes
- Hand-Held Push-to-Talk Microphone: Part Number 2405-28
- (1) 12VDC Slide Terminal Gel-Cell Rechargeable Battery: Part Number 2890-05 - Expected life: 20 Hrs
- User Manual
Tech Note
All communicators will transfer topside noise to the diver when using the radio speaker only. To eliminate background noise and achieve clear concise communications, use a Push-to-Talk microphone, headset, or a Remote Walk-and-Talk with a headset.
Two and three Year Extended Warranties are available for this product. Please refer to the Attachments tab for further information on the program and the Accessories tab to purchase them.
- Descriptions
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The Amcom II 2825A series of commercial diver communication systems are full-featured, hard-wired, two-diver communicators for mixed gas commercial diving.
Amron’s new DSP2 Helium Speech Unscrambler (HSU) utilizes the latest in technological advancements. The heart of our design incorporates dual digital signal processors. This revolutionary concept allows our HSU to be truly 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).
The Amcom™ II Series 2825A communicator is the most versatile and powerful two-diver communicator on the market today. The most unique feature is the design of separate channels and volume controls for each diver and the tender, both for the uplink and the downlink paths. Each diver may have different equipment such as microphones and speakers or different listening and speaking characteristics. You can set the volume for each diver and tender to their individual comfort level. Both divers can be set up on 2-wire and/or 4-wire mode, or one diver on 4-wire mode and the other on 2-wire mode or any combination of the two modes.
- Parts
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- Accessories
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- Attachments
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2011 Amron International Catalog - Page 10 (Size: 237.9 KB) 2011 Amron International Catalog - Page 4 (Size: 226.6 KB) 24XX-MIC - Panel Microphone Installation Instructions (Size: 18.3 KB) Amcom II 2 Diver Communicator 2825A/24/26DSP2 User Manual (Size: 1.6 MB) Amcom II Communicator 2820A and 2825A User Manual (Size: 1 MB) Amron Extended Warranty Program (Size: 58.8 KB) - Videos
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Brand Amron International Communication Mode 2-wire/4wire Video No - FAQ
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Product FAQ's
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Can you stack the banana plugs from the diver's communicators cable so you can have two divers on each diver channel?
Although it may be possible, we stronly discourage such operation. The added workload would cause overheating and stress to the amplifier card. Prolonged use in this condition will eventually cause perment damage and failure to the amplifier card.
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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 charger you will need to verify if the charger is properly charging the battery.
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 this AC POWER LED does not light up when the communicator is plugged in, then check fuses F1 and F2 on the charger Printed Circuit Assembly (PCA). Allow the communicator to charge overnight. Unplug the communicator and re-measure the voltage across the PTT jack. 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 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. If the voltage higher than previous measurement but less than 13.5 Volts, then the battery is bad and needs to be replaced. 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. less than 13.5 Volts, then the battery is bad and needs to be replaced. 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. -
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 could be reduced by as much as 50%, but it will never be eliminated.
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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 fuses, F1 and F2, to blow on the battery charger board and in extreme cases damage the charger circuitry. The battery charger 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.
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How can I test for a blown fuse on my Amcom II 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.
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How do I install a new microphone in my Amcom II Communicator?Please refer to the Panel Microphone Installation instructions located in the attachments tab.
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