RT-500M Specifications

Electric characteristics    
Method of bearing   Doppler-principle (3 kHz rotational frequency, right / left rotation)
Bearing Indication   Relative bearing and True bearing (if ext. heading data available)
Bearing accuracy   ±5°
Internal resolution   1°
Sensitivity  

RF-voltage at receiver-input (50 Ohm):
VHF < 100 nV; Marineband < 100 nV; UHF < 100 nV; 406 MHz < 150 nV

Frequency stability   ±2.0 ppm (Δf/f=±2·10-6) [in temperatur range -30°C … +80°C]
Receiving bands   4 (VHF-Airband; VHF-Marineband, UHF-Airband; Cospas/Sarsat)
Receiving requency
(frequency ranges)		   VHF air band:
118.000 ...121.500 ... 122.975 MHz

VHF marine band:
156.000 ... 156.800 ... 162.025 MHz (Channel 0..28 / 60..88 / Sea+Coast)

UHF air band:
240.000 ... 243.000 ... 245.975 MHz

Cospas/Sarsat :
400.000 ... 406.025 ... 409.975 MHz
Channel pattern   25 kHz
Scanning / Monitoring mode:  

Monitoring:
While normal operating, 4 additional frequencies will be surveilled.
(Emergency frequencies 121.500; 243.000 and two free selectable frequencies)

Standby:
In Standby mode the emergency frequencies, the Cospas/Sarsat and one free selectable frequency is always surveilled.
Signal Filtering:   Optional, all emergency frequencies can be filtered for ELT-modulation. (Disabling false alarms)
Cospas/Sarsat analysis:  

Reception and analysis of Cospas/Sarsat data signal (112 resp. 144 bit, 400 baud, biphase L-phase modulated, with Bose-Chaudhuri-Hocquenghem error test/ specified according Cospas/Sarsat)C/S T.001 October 1999)

Indication of datacontent (mode, country, GPS-coordinates)
Bearable kinds of modulation:   A3E, F3E, A3X (ELT-modulation); bearing largely independent of modulation
Polarisation   Vertical
Error of polarisation   ≤ 5° at 60° field vector rotation
Garbling cone   app. 30° to the vertical
Time of response   ≤ 50 ms (with sufficient receiving field strength)
Keyboard   Foil on the front with integrated keyboard-matrix and EL-background illumination
TFT graphic display   320 x 240 pixel with max brightness of app. 450 cd/m²,
continuously variable brightness.
Operating voltage   12 V ... 30 V DC
Current consumption   app. 2.5 A max.
Audio   External Speaker 4W (4 Ohm, 8 Ohm )
Line Out (adjustable from 100 mV pp to 2000 mV pp)
Interfaces  

NMEA Input/Output (RS422 and RS232)
Ethernet LAN
Testport (RS232) optional custom-specific
Alarm relay output (1 A, 30 V DC / 0.3 A, 125 V AC)
PTT input for self bearing suspression
Squelch output for ext. audio controlling

     
Mechanical Characteristics DCU    
Weight   app. 1200 g (2.7 lbs)
Tolerable operating temperature   -20°C .. +60°C
Protection system   IP67
     
Mechanical Characteristics AU (Antenna Unit)    
Weight  

app. 5200 g (11.7 lbs)
Tolerable operating temperature   -40°C ... +60°C
Protection system   IP67