Personal Locator Beacon MR 509

The personal locator beacon will transmit emergency signals at the international emergency frequencies 121.5 MHz (F1) and 243.0 MHz (F2). The personal locator beacon shifts permanently between transmitting on F1 and F2 and the COSPAS/SARSAT satellite frequency 406.025 MHz (F3). The signals F1 and F2 can be picked up by search and rescue teams to assist locating the crew in distress.

The reception of the F1 and F2 signals is possible with any AM-UHF/VHF receiver. A suitable DF system serves for direction finding.

When the personal locator beacon is switched on, The MR 509 automatically transmits the emergency frequency signal. This beacon signals (sweep tone) can be monitored by the integral speaker or by the flashing light on top.

In addition to beacon operation, i.e. automatic transmission of emergency signals, the personal locator beacon can also be used for two-way voice communication. The receive frequency is 243.0 MHz. Build-in test facilities allow a simple confidence check to be carried out for correct functioning of the transceiver and battery state.

Furthermore the personal locator beacon is equipped with a serial data interface for maintainance purposes.

• Battery Li-MnO2 nom. 8.4 V / 4Ah
• Transmission ON life > 24 h at 0 degrees C
• Modes of operation Beacon operationRadiotelephony operation
• Number of transmit channels 3
• Numbers of receive channels 1
• Unit antenna 3 band rot antenna
• Unit dimensions (H x W x D) 154 x 88.8 x 45 mm
• Weight (without battery) 580 g
• Weight (with battery) 760 g

Transmitter Data:

• Emergency transmit frequencies: F1 (VHF) = 121.500 MHzF2 (UHF) =243.000 MHzF3 (UHF) = 406.025 MHz
• Training transmit frequencies: F1 (VHF) = 122.500 MHzF2 (UHF) =245.100 MHzF3 (UHF) = 406.025 MHz (training code)
• Radiation on beacon operation F1 and F2 simultanously (intermittend), F3 alternating with F1 and F2 every 50 sec. +/- 5 %
• Radiation on telephony operation F1 and F2 simultanously, F3 switched off
• Frequency accuracy F1 (121.5 MHz) = < +/- 30 x 10-6F2 (243.0 MHz) = < +/- 30 x 10-6F3 (406.025 MHz) = < +/- 2 kHz
• RF nominal output power A2X (beacon operation): F1 (121.5 MHz) = > 100 mW (with Fo +/- 30 Hz, > 0.3 P-nom)F2 (243.0 MHz) = > 100 mW (with Fo +/- 60 Hz, > 0.3 P-nom)F3 (406.025 MHz) = 5 W +/- 2 dB
• Modulation in beacon operation: F1, F2 (121.5 MHz / 243.0 MHz) = A2X; m = 60 % +/- 10 %F3 (406.025 MHz) = message according to C/S specification T.001
• Modulation in telephony operation: F1, F2 (121.5 MHz / 243.0 MHz) = A3E; m > 70 %, 350 - 2500 Hz, distorsion at 1 kHz < 10 %
• Nominal out impedance: 50 ohms

Receiver Data:

• Receive frequency 243.000 MHz
• Training frequency 245.100 MHz
• Sensitivity < 3 uV; 6dB (S+N)/N; m=30 %
• Frequency accuracy < +/- 30 x 10-6
• IF bandwidth > +/- 18 kHz at -6dB< +/- 50 kHz at -60dB
• Undesired frequency suppression Sideband attenuation > +/- 50 kHz > 50 dBImage frequency > 50dBIF frequency > 70dB
• Large signal characteristic < 23 dBm (without destruction)
• AGC characteristics: Vin of 10 uV ... 10 mV < 4dB (change of AF amplitude)Vin of 10 uV ... 100 mV < 6dB (change of AF amplitude)
• Nominal input impedance for 243.000 MHz: 50 ohms
• AF output power:: Radiotelephony operation > 100mW at m=90%; fmod = 1kHzBeacon operation (sidetone) > 25 mW; fmod = 1 kHz
• AF frequency response: - 4dB, referred to 1 kHz = 0dB; fmod 350 Hz ... 2500 Hz
• AF distorsion: < 10%; m=80%; fmod = 1kHz

Environmental conditions:

• Operating temperature -20 degree C ... + 55 degree C
• Storage temperature (without battery) -55 degree C ... + 85 degree C
• Altitude </= 82000 ft (25000 m)
• Shock resistance 32 g; 10 ... 20 ms
• Acceleration safety 25 g; slope 250g/s
• Vibration MIL Std. 810E method 514/4/I; cat. 9 and 10
• Tropicalized MIL Std. 810E; climate zone C-0, C-1, C-2
• Waterproof 10 m water depth (0.981 bar) 5 minutes