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RT-500-M

Product catalog summary

Overview
The RT-500-M is a comprehensive direction-finding solution designed for professional Search and Rescue (SAR) applications at sea. It operates across four frequency bands, covering both civilian and military emergency frequencies, and is capable of receiving and decoding Cospas-Sarsat signals.

Key Features

Operates on VHF and UHF bands, including emergency frequencies 121.5 MHz and 243 MHz.
Receives Cospas-Sarsat signals on 406 MHz and displays beacon ID and GPS position.
High reception sensitivity and bearing accuracy with a ±5° margin.
Automatic monitoring of all emergency frequencies with selective alarm activation.
Robust design suitable for heavy seas and stationary landside applications.
IP 67 protection rating for both antenna and control unit.
Compatibility with NMEA, RS-232, and LAN interfaces.

Technical Specifications

Bearing Method: Doppler principle with 3 kHz rotational frequency.
Bearing Accuracy: ±5° with internal resolution of 1°.
Frequency Stability: ±2.0 ppm within -30 °C to +80 °C.
Reception Bands: VHF air and marine bands, UHF air band, Cospas-Sarsat.
Response Time: Less than 50 ms under optimal conditions.
Operating Voltage: 12 V to 30 V DC with a maximum current consumption of 2.5 A.

Mechanical Characteristics

Display Control Unit: Weight approx. 1200 g, operating temperature -20 °C to +60 °C.
Antenna Unit: Weight approx. 5200 g, operating temperature -40 °C to +60 °C.

Conclusion
The RT-500-M is a versatile and reliable direction-finding system, ideal for maritime and coastal SAR operations, offering high precision and robust performance in challenging environments.

Catalog excerpts

4-Band Precision Direction Finder The RT-500-M is a complete direction-ﬁnding solution for professional SAR applications at sea. This universal multi-band direction ﬁnder operates on four frequency bands and automatically monitors not only civilian bands (121.5 MHz, channel 16) but also military emergency frequencies (243 MHz). The RT-500-M can receive Cospas-Sarsat signals (406 MHz), provide the bearing of the source and display the content. The brilliant TFT display conveniently displays bearing information and operating parameters. The control unit and the antenna are designed for use in heavy seas. In addition, the RT-500-M is also ideal for stationary landside applications, e.g., vessel trafﬁc servic

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Features • Extended range due to high reception sensitivity • High bearing accuracy • 88 marine and coastal radio channels (156.000 to 162.025 MHz) • VHF emergency frequency 121.500 MHz and freely selectable training frequencies (118.000 to 122.975 MHz) • UHF emergency frequency 243.000 MHz and freely selectable training frequencies (240.000 to 245.975 MHz) • Cospas-Sarsat signals and freely selectable training frequencies (400.000 to 409.975 MHz) • Display of the Cospas-Sarsat messages • Clear and brilliant colour TFT display (450 cd/m2) • Conveniently arranged controls with key and menu functions...

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Technical data Method of bearing: Doppler principle (3 kHz rotational frequency, right / left rotation) Bearing indication: Relative bearing and true bearing (if external heading data available) Bearing accuracy : Internal resolution: RF voltage at receiver input (50 Ω): VHF, UHF: < 100 nV, Cospas-Sarsat: < 150 nV Frequency stability: Reception bands: 4 (VHF air band, VHF marine band, UHF air band, Cospas-Sarsat) Reception frequencies, frequency ranges: VHF air band: 118.000 to 121.500 to 122.975 MHz VHF marine band: 156.000 to 156.800 to 162.025 MHz (channels 0 to 28 / 60 to 88 / sea + coast)...

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www.rhotheta.com Mechanical characteristics of Display Control Unit (DCU) Operating temperature: Storage temperature: Ingress protection: �� Mechanical characteristics of Antenna Unit (AU) Weight: Operating temperature: Storage temperature: Ingress protection: All product speciﬁcations subject to change without notice. RHOTHETA Elektronik GmbH Dr.-Ingeborg-Haec

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RT-500-M

RT-500-M

Catalog excerpts

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