[Main](/) ❯ [Navigation & tracking systems](/navigation_and_tracking_systems_en) ❯ **Zima2-R: Device specification**
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[support@unavlab.com](mailto:support@unavlab.com) | **Zima2-R** - **Zima2 USBL** responder-beacon
Device specification | ## KEY FEATURES * **Extremely small size and weight** * **Communication range up to 3000[1](#footnote1) m** * **Highly reliable digital underwater acoustic communication resistant to multipath propagation** * **Code division multiple access - up to 16 isolating addresses** * **Low power consumption (Rx/Tx) 0.33/10 W** * **Built-in pressure/temperature sensor** * **Patented[*](#footnote_a1) monoblock design** ## DESCRIPTION **Zima2-R** - responder-beacon of the ultra-short baseline navigation system [Zima2 USBL](Zima2_DataBrief_en.md). The device is designed to be placed on an underwater object in order to determine the location of this object in real time using the direction-finding antenna [Zima2-B](Zima2B_Specification_en.md). The device can be either standalone (with an additional [battery pack](/documentation/EN/Accessories/Sub_batteries_en#sb2448lf)) or interfaced with the carrier for power. Extremely small size, ease of use and low power consumption make the direction-finding system [Zima2 USBL](Zima2_DataBrief_en.md) an ideal solution for working with autonomous and remotely controlled vehicles, as well as for determining the relative position of divers. ________________ * Patent RU2659299C1.
## TECHNICAL SPECIFICATIONS | PARAMETER | VALUE | | :--- | :--- | | DIMENSIONS (Ø x h) | 64 x 62 mm | | WEIGHT (dry)[2](#footnote2) | 0.3 kg | | MAXIMUM DEPTH | 300 m | | DEPTH RESOLUTION | 0.6 m | | MAXIMUM ACOUSTIC COMMUNICATION RANGE[1](#footnote1) | 3000 m | | ACOUSTIC SOURCE LEVEL | 170 dB re 1 μPa @ 1 m | | CARRIER FREQUENCY | 20100 Hz | | BUILT-IN TEMPERATURE SENSOR ACCURACY | 0.1°C | | SUPPLY VOLTAGE | 12 V | | DATA LINE VOLTAGE | 0 .. 3.3 V | | BIT ERROR RATE | 10-6 | | SNR[3](#footnote3) | -3 dB | | MAXIMUM RELATIVE VELOCITY | ± 2 m/s | | STARTUP TIME | 100 ms | | OPERATING TEMPERATURE RANGE | -5 .. 50 °C | | POWER CONSUMPTION (Rx/Tx) | 0.33 / 10 W | | INTERFACE | UART 9600 bit/s | | COMMUNICATION PROTOCOL | NMEA 0183 [PAZM](Zima2_Protocol_Specification_en.md) | | CABLE LENGTH[4](#footnote4) | 0.5 m | | MAXIMUM NUMBER OF ADDRESSES | 16 | ________________ - 1 A parameter that determines the maximum range at which a signal can be received, based on electro-acoustic parameters of the transmitter and receiver, spatial decrease in the intensity of sound energy, attenuation in the medium and the acoustic noise level. - 2 Excluding the weight of the battery pack. Standard battery pack [SB-24-48-LF](/documentation/EN/Accessories/Sub_batteries_en#sb2448lf). - 3 The value was obtained in a laboratory static experiment, without taking into account the multipath propagation effect. - 4 The value can be changed on request. - 5 Obtained in laboratory conditions in a static experiment.
## ADDITIONAL INFORMATION In the standalone version, the device is equipped with the battery pack [SB-24-48-LF](/documentation/EN/Accessories/Sub_batteries_en#sb2448lf) based on LiFePO4 (lithium iron phosphate) batteries, which provide more than a thousand charge-discharge cycles and operation at low ambient temperatures. The responder-beacon is connected to the battery pack through a sealed connector, which additionally provides the function of automatically switching the device on when it is immersed in water. The operating time of the responder-beacon on the battery pack depends on the intensity of the exchange with the direction-finding antenna, which in turn depends on the range, the number of responder-beacons polled by the direction-finding antenna and the hydrological conditions. ### BATTERY LIFE | POLLING PERIOD, s | OPERATING TIME, h | NOTE | | :---: | :---: | :--- | | - | 70 | Without polling, in receiving mode | | 1 | 8 | Shortest possible polling period | | 2 | 16 | | | 4 | 32 | | | 8 | 64 | | | 16 | up to 70 | | ### CABLE WIRE ASSIGNMENT (In the integrated version) | WIRE COLOR | FUNCTION | | :--- | :---: | | 🟥 Red | + Usupply | | 🟩 Green | Tx | | ⬜ White/Transparent | Rx | | 🟨 Yellow | SVC | | Shield | - Usupply |