RHOTHETA Elektronik

RT-B77 HELB
Personal Locator Beacon

The RT-B77 HELB is currently the most advanced and most powerful PLB available on the market for MOB emergencies. The RT-B77 is designed for automatic activation upon contact with water or inflation of the wearer’s life jacket and can also be activated manually. This PLB also features a second frequency that can be used for testing or training purposes. Transmission of a dedicated ID and simple control of system and maintenance data by means of an IrDA interface are important benefits for operators of larger fleets. Autotest functions and status reports are announced by the system's speaker to guarantee high availability.

Very high output power
Designed for use under adverse conditions
Extremely compact, lightweight design
High efficiency RF amplifier technology
Water resistant up to 50 m for diving applications
Automatic activation upon contact with water (can be disabled)
Programmable beacon ID for transmission
Functional and operating status by LED and built-in speaker
Voice output at RF and speaker
PLL design for free selection of training frequency
Microprocessor controlled power management for long battery life

Operating frequency	121.500 MHz (VHF)
Training frequency	Preselectable (in 25 kHz increments between 120.000 and 125.000 MHz)
Frequency precision	Better than ±500 Hz
Output power	2 W¹
Modulation	A2X and ASK (software definable), FSK (on request)
Operating temperature	-20 °C to +60 °C
Ingress protection	Water resistant up to 5 bar / 50 m
Battery type	2 x 9 V block LiMnO₂
Battery life	6 h to 48 h¹
Interfaces	IRDA and RS-232
Antenna	260 mm monopole antenna, 90° monopole life jacket antenna
Dimensions	103 x 75 x 27 mm
Weight	230 g with antenna