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[Main](/../../)[Underwater acoustic modems](/underwater_acoustic_modems_en)**Device specification: uWave**
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<div style="page-break-after: always;"></div>
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| ![logo](/documentation/sm_logo.png) | |
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| :---: | ---: |
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| [www.unavlab.com](https://www.unavlab.com/) <br/> [support@unavlab.com](mailto:support@unavlab.com) | **uSwitch** - Underwater acoustic modem <br/> Device specification |
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<div style="page-break-after: always;"></div>
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## KEY FEATURES
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* **Simple and affordable solution**
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* **Communication range up to 300<sup>[1](#footnote1)</sup> m**
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* **Data transmission speed 100 bit/s**
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* **Signal propagation time measurement function**
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* **Water contact switch function**
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* **Can be used as a pinger for the [WAYU](documentation/navigation_and_tracking_systems_en#wayu) system**
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* **Low power consumption (Rx/Tx) 20 mA / 2.5 A **
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* **Ideal solution for educational projects and training**
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<div style="page-break-after: always;"></div>
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## DESCRIPTION
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The **uSwitch** modem is a simple and affordable solution for transmitting data through the water column over short distances.
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Working with the device requires minimal skills, which allows you to use it as a simple tool, focusing on the user's tasks.
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For example, for testing various network algorithms, prototyping and building specialized navigation systems, remote control systems, etc.
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The device is supplied as an assembly of printed circuit boards and a hydroacoustic antenna on a cable.
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The following items can be used as an antenna:
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- [RT-1.332820-1](https://docs.unavlab.com/documentation/RU/Transducers/RT_1_332820_1_Specification_ru.html) - Affordable solution with minimal dimensions
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- [RT-2.332820-1](https://docs.unavlab.com/documentation/RU/Transducers/RT_2_332820_1_Specification_ru.html) - Dual-element antenna with increased sensitivity for surface operation
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- [RT-1.524525-1](https://docs.unavlab.com/documentation/RU/Transducers/RT-1.524525-1_specification_ru.html) - High sensitivity antenna
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<div style="page-break-after: always;"></div>
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## TECHNICAL SPECIFICATIONS
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| PARAMETER | VALUE |
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| :--- | :--- |
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| DIMENSIONS | 100 x 19 x 25 mm |
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| WEIGHT | 0.03 kg |
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| MAXIMUM ACOUSTIC COMMUNICATION RANGE<sup>[1](#footnote1)</sup> | 300 m |
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| DATA TRANSFER RATE | 100 bps |
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| POWER CONSUMPTION Rx/Tx | 20 mA / 2.5 A |
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| SUPPLY VOLTAGE<sup>[2](#footnote2)</sup> | 7 .. 13 V |
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| DATA LINE VOLTAGE | 0 .. 3.3 V |
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| FREQUENCY RANGE | 23000 .. 27000 Hz |
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| MAXIMUM ACOUSTIC PRESSURE<sup>[3](#footnote3)</sup> (In-band) | 165 dB re 1 µPa @ 1 m |
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| MAXIMUM RELATIVE VELOCITY | +/- 2 m/s |
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| OPERATING TEMPERATURE RANGE | -5 .. 50 °C |
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| INTERFACE | UART 9600 bps |
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________________
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<a name="footnote1"><sup>1</sup></a> Параметр, определяющий максимальную дальность, на которой возможен прием сигнала, исходя из электроакустических параметров передатчика и приемника, пространственного убывания интенсивности звуковой энергии, затухания в среде и уровня гидроакустических помех.
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<a name="footnote2"><sup>2</sup></a> Максимальная выходная мощность достигается при питании модема напряжением 12 В.
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<a name="footnote3"><sup>3</sup></a> При использовании антенны [RT-1.332820-1](https://docs.unavlab.com/documentation/RU/Transducers/RT_1_332820_1_Specification_ru.html).
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<div style="page-break-after: always;"></div>
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## РАСПИНОВКА И ПОДКЛЮЧЕНИЕ
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| ![image](https://github.com/user-attachments/assets/058c5ff9-68f8-4139-831d-2092fda60fd2) |
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| :---: |
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| Модем **uSwitch**</br>*расположение и функции контактных площадок* |
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| ОБОЗНАЧЕНИЕ | НАИМЕНОВАНИЕ | I/O | АКТИВНОЕ СОСТОЯНИЕ | ФУНКЦИЯ |
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| :--- | :--- | :---: | :---: |:--- |
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| 1 | GND | - | - | Земля/Общий |
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| 2 | STR_TRX | O | 1 | Строб при начале передачи/приема, не менее 10 мс |
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| 3 | GND | - | - | Земля/Общий |
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| 4 | TX_OVF | O | 0 | Если буфер передачи полон, выставляется 0 |
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| 5 | GND | - | - | Земля/Общий |
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| 6 | TX | O | - | Tx приемника |
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| 7 | GND | - | - | Земля/Общий |
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| 8 | RX | I | - | Rx передатчика |
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| 9 | +U<sub>пит.</sub> | I | - | Питание |
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| 10 | +U<sub>пит.</sub> | I | - | Питание |
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| X1 | ANT | - | - | Подключение гидроакустической антенны |
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| X2 | WATER_DET | - | - | Контакты детектора воды |
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<div style="page-break-after: always;"></div>

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