RedLine long-range modem

Has no equivalent worldwide in terms of the ratio of size to maximum communication range to data rate

The optimal device for operation in difficult hydrological conditions and in shallow water

The RedLine modem is the optimal solution even for small underwater devices, thanks to its compact size and low power consumption.

Key advantage of RedLine

The modem's monoblock design significantly simplifies installation and integration. With its extremely small size and weight and an impressive communication range of up to 8000 m, simply connecting the device is enough to get started — immediately after power-on the user gets a transparent channel that requires no knowledge of the modem's control protocol.

Simply apply power — and the modem is ready to receive and transmit data!

Purpose and applications

RedLine is a family of wireless underwater digital communication modems with a transparent data channel. Its small size and low power consumption make it suitable both for small ROVs and AUVs and for larger underwater vehicles; the modem can also be used in wireless underwater sensor networks. Code division of subscribers (20 channels) lets it transmit data efficiently to several devices.

Key specifications

According to the specification, the modem operates in the 5–15 kHz band at depths of up to 400 m and produces a sound pressure of up to 170 dB re 1 µPa at 1 m. The supply voltage is 12 V, and the pairing interface is UART at 9600 bit/s (0–3.3 V levels) with the NMEA 0183 PTNT protocol. The minimum packet size for transmission is 7 bytes, and the transmit buffer is 256 bytes. The operating temperature range is −5 to +50 °C, the maximum relative speed is ±3 m/s and the default cable is 0.5 m (the length can be changed). The monoblock design is patented (patent RU2659299C1).

Compatibility

The RedLine housing is unified with that of the RedNode navigation receiver, so standard integration solutions suit both devices. For networks that need short code commands for 25 subscribers, the range has the RedGTR modem, and for communication at distances of up to 1000 m, uWave.

Documentation

Besides the specification, docs.unavlab.com provides the RedLine pairing protocol description and the wiring diagram.