Description
Special Features
• Universal dual-band direction finder system for the VHF marine and aviation bands and the VHF/UHF aviation bands
• SAR direction finder, communication direction finder and navigation aid
• Automatic monitoring of emergency frequency 121.500 MHz during work on marine radio band
• Unsurpassed reception sensitivity in this class to permit detection of extremely weak or distant signals
• Selective Squelch to avoid false Alarms
• Display of bearing with reference direction as true north, magnetic north or relative
• Completely illuminated control unit
• Optimized signal processing for fast, stable direction finding
• Excellent localization precision
• NMEA, RS-485 and RS-232 interfaces for system integration and remote control capability
• Correction of lag error after changes in direction by attaching a Compass modul
• Optimized for use at sea: robust, compact design, waterproof (IP67)
Technical Data
| Method of bearing | Doppler-principle (3 kHz rotational frequency) |
| Bearing accuracy | ≤ 5° (RMS) |
| Bearing reference | Relative to antenna orientation, magnetic or geographic north (with optional Compass modul or external Compass Information) |
| Resolution | LED Display: 10° LCD Display: 1° Data Interface: 1° |
| Bearing Sensitivity Airband | 0,7 µV/m (typical) at ±5° bearing fluctuation |
| Frequency range RT-300 VS: | VHF air band: 118.800 to 124.000 MHz VHF marine band: 156.000 to 162.300 MHz (maritime, channel 01 – 88) |
| Frequency steps | 25 kHz |
| Bearable modulation types | A3E, F3E, A3X (Distress signal-modulation); bearing largely independent of modulation |
| Polarisation | vertical |
| Error of polarisation | ≤ 5° at 60° field vector rotation |
| Time of response | ≤ 300 ms typ. (with sufficient receiving field strength) |
| Display | LC-graphic display 98×32 dots with backlight 13 buttons with legend illumination 36 LED circle for bearing display Free adjustable dimming of LCD backlight, legend illumination and LED circle illumination |
| Supply voltage range | 12 V to 28 V DC |
| Current consumption | supply voltage of 12V = stand by 350mA (4.2 W) supply voltage of 28V = stand by 250mA (7.0 W) typ. without ext. speaker 400mA (4.8 W) 300mA (8.4 W) typ. with ext. speaker 600mA (7.2 W) 400mA (11.2 W) max. without ext. speaker 450mA (5.4 W) 350mA (9.8 W) max. with ext. speaker 800mA (9.6 W) 600 mA (16,8 W) |
| External audio | max. 1.5 W at 4 Ohm (Upp-max = 10 V) |
| Data Interface | Remote Control: RS232, RS485 Self-bearing Suppression: Discrete PTT Input Alarm Output: Discret/optional |
| Weight | DCU: app. 700 g AU: app. 1400 g |
| Temperature range | DCU: – 20°C to + 60°C AU: – 40°C to + 60°C |
| Protective systems | DCU: IP 67 AU: IP 67 |
| Bearing Sensitivity Marineband | 2 µV/m (typical) at ±5° bearing fluctuation |
| Frequency range RT-300 VU | VHF air band:118.800 to 124.000 MHz UHF air band: 241.000 to 245.000 MHz |
| Dimensions | Display (length x width x height): 220 mm x 113 mm x 27,8 mm Antenna (Diameter x height): 260 mm x 600 mm |
| Windload | Constant wind speed, without ice load 150 km/h ca. 115 N 180 km/h ca. 165 N Constant wind speed, with ice load 150 km/h ca. 150 N 180 km/h ca. 215 N |
Accessories
Kompass Modul
The compass module allows a direction indication with a northbound reference direction. By using the compass module, the so-called drag error is negated and the direction finding system responds without delay to a change of heading of the vessel.
DC/DC Converter
The DC / DC converter prevents damage to the direction finding system due to compensation current which flows across the System Ground to minus voltage supply e.g. generated when starting the engines. Mandatory for vessles with metal hull.