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uWave underwater acoustic modem
Device specifications

KEY FEATURES

DESCRIPTION

uWave is the world smallest3 underwater acoustic digital modem, which allows to communicate up to 20 subscribers in area 1000 x 1000 meters with both transparent channel and predefined code messages/telemetry transmission. Extremely small size, low power consumption and simplicity of usage make uWave an ideal solution for AUV control as well as data transmission, where dimensions and weight are the bottleneck.

The device allows:

Devices from uWave family use a simple open NMEA-like configuration protocol, and the supplied open-source libraries uWaveLib (.NET) and uWave ALib (Arduino) allows for the fastest and easiest integration of devices into custom solutions.

TECHNICAL SPECIFICATIONS

PARAMETER VALUE
DIMENSIONS (Ф х h) 41 x 45 mm
WEIGHT (dry) 0.16 kg
DEPTH RATING 300 m
MAX OPERATING RANGE1,2 1000 m
PAYLOAD DATA RATE 78 bit/s
POWER CONSUMPTION Rx/Tx 0.33/6 W
POWER SUPPLY4,7 5 .. 12 V
DATA LINES VOLTAGE 0 .. 3.3 V
DATA LINES OUTPUT IMPEDANCE 1 kOhm
FREQUENCY BAND 10 .. 30 kHz
ACOUSTIC SOURCE LEVEL (IN BAND) 169 dB re 1 uPa @ 1 m
BIT ERROR RATE 10-6
SNR5 -2 dB
MAX RELATIVE VELOCITY +/- 1 m/s
RATED START-UP TIME 100 ms
OPERATING TEMPERATURE RANGE -5 .. 50 °C
INTERFACE6 UART 9600 bit/s
CONFIGURATION PROTOCOL NMEA0183 PUWV
CABLE LENGTH6 0.5 m
SUBSCRIBERS CODE DIVISION 20 code channels
COMMAND MODE 16 predefined messages (9 for user applications)
PACKET MODE 254 subscribers with an acknowledgement; broadcasting; packet size up to 64 bytes
TX BUFFER SIZE 127 bytes
PROPAGATION TIME MEASUREMENT RESOLUTION 0.0001 sec

1 A parameter that determines the maximum range at which a signal can be received based on the electro-acoustic parameters of the transmitter and receiver, spatial decrease in the intensity of sound energy, attenuation in the medium and acoustic noise level.
2 Based on the test results in a shallow water body, using the uWave devices, the practical communication range 1092 m was obtained.
3 According to open sources, June 2021.
4 Maximum output power can be achieved with 12V power supply.
5 This value is obtained without the presence of the multipath effect.
6 Сan be changed by special request.
7 The device has built-in overvoltage protection of the amplifying circuit. At voltages over 12.8-13 volts, the device does not turn on the power amplifier, i.e. does not allow data transfer.
8 Considering the given value, the resolution when measuring the distance, considering the speed of sound 1500 m/s is 0.15 m