By flexible tasks modulation and coding, a variety of available transducers in different frequency bands, high maximum transmit power, power efficiency and flexible interfaces, a powerful solution for damanding subsea communication is ensured. develogic HAM.BASE is optimized for transmission ranges up to 1,000m (Basis HF Version).
The compact composite corrosion proof housing is rated to 800m depth. Furthermore compact deep water housings rated to 6,000m depth are available on demand.
The develogic standard HF Base modem is able to operate with carrier frequencies in between 40 and 65Hz. This relatively high frequency band, is significantly less affected by environmental acoustic emission and therefore – together with the proven efficiency of the modulation and coding algorithms – enables new applications requiring transmission performance not available up to now.
develogic system electronics are designed to work reliably within a bandwidth of 2.5kHz to 70kHz. Maximal transducers drive voltage is 780Vpp and is able to deliver up to 200W electric power to the transducer. As the power amplifier has a direct drive, transformerless design, transducer tuning is usally not necessary .
The HAM.BASE standard version includes two combined RS232/422 and two RS232 communication ports with configurable supply to external sensors. Besides our SDHC data logging solution – interfacing to many oceanographic sensors like current meters/profilers, CTD-probes etc. – is already supported or easily configurable.
Communication
Modulation and Coding
- Non coherent n-mFSK modulation for maximum performance in complex transmission channels-OFDM module optionally
- High performance mOFDM modulation optional.
- Variable rate convolutional forward error correction
- Doppler correction up to 10 m/s and 1g acceleration
- Bidirectional, handshaked transmission for maximum transmission reliability
- Transparent data compression
- Compatible with HAM.NODE systems within same frequency band – limited to n-mFSK modulation
- User data rates up to 10Kbs
Transducer Options / Carrier Band
- Standard transducer with hemispherical directivity
- 40kHz – 65kHz carrier band
- SPL max. 190 dB re 1uPa/1m
- Range up to 1200m with standard transducer
- Other transducers available upon request
Networking Capabilities
- Up to 15 coexisting nodes
- Store and forward
Transponder Controller Board (TCB)
Extended Functionality
- Ranging
- Integrated SDHC data logger
Interfaces
- 1 serial interface (RS232/422)
- 1 CAN 2.0B (optional)
- Optional digital I/O interface:
- 4 digital inputs (TTL or switched)
- 4 analog inputs (0-10V, 0-2.5V)
- 2 optically isolated switched outputs, max. 450 mA, 40V
- 2 non isolated, protected switched outputs with common supply, max 36V, 6A
Power Supply:
- 4 to 33 V, reverse voltage protected
- 10mW power consumption in standby acoustic mode, up to 100W during transmit
Pressure Housing:
- Titanium compact housing – absolute corrosion resistance backed by 5 years warranty
- Depth rated to 6000m
- 85mm diameter, length 600mm
- Up to 550Wh internal battery capacity
- Titanium connectors
Accessories
Mooring Frame
- Stainless steel mooring frame, 10kN safe operating load
Surface Cable
- Rugged surface interface and suspension cable
Configuration and Control Software
- Delivered with L.COM configuration, control and data management software
- For examples of our track record please visit our page Worldwide Applications.