Axnes Aviation AS
Document number
Revision
Date
AX-PSB-UMAN-0027
Issue E
2015-03-05
Page 1-1
Section 1:
General information
1.1 Introduction
The Polycon system is a wireless extension of an aircraft
’s ICS. The system consist of one
base station and one or more handheld radios. The base station is connected to the aircraft
’s
ICS and the handheld radios are connected to a headset. The headset can be incorporated
in the helmet of the users. The base station works as a repeater station; both between the
wireless crew, as well as between wireless crew connected through Polycon and crew
connected to the wired ICS onboard the aircraft.
The system allows the users equipped with Polycon wireless radios to communicate with the
rest of the crew as if he/she was connected to the wired part of the ICS. Due to purpose built
technology and utilizing the UHF radio band the wireless users may leave the aircraft and still
retain robust and dependable communication over long distances, and to some extent even
when the radio is submerged.
Both the base station and the handheld units operate with Axnes Patented None Interrupted
Voice activated transmission (NIVOX) solution, securing optimal VOX control of the
communication. Noise cancelling electronics incorporated makes VOX operation achievable
even inside or in close vicinity of the aircraft, on ground or in hover mode.
The MP20 series hand held radio is a portable waterproof radio for wireless communication
with the aircraft crew while operating inside or outside of the aircraft. The MP20 series hand
held radio
can be connected to the winch man’s helmet/headset, or used as a hand held
Walkie-Talkie. The system provides two-way voice communications between the helicopter
crew and SAR winch man, whilst the winch man is either outside the aircraft during winching
operations or remote from the aircraft.
The system has been designed for minimum weight, size and power consumption, combined
with the ruggedness and functionality required to meet the demanding environmental
conditions typical for its operational use.
The MP20 series hand held radio is designed for functional integrity, providing ease of
operation, while at the same time safeguarding against interruptions caused by unintentional
operation.
The MP20 series hand held radio
will interface with the winch man’s helmet/headset to
permit hands free communication.
The MP20 Series hand held radio offers casualty communication - allowing the winchman to
communicate through the MP20 internal microphone with the injured person without
removing the helmet/headset.
The system can be programmed with up to 16 channels in the ranges of 408,600
– 409,600
MHz (Rx of base station) and 418,600
– 419,600 MHz (Tx of base station), and in the
maritime VHF band for dual band radios. To accommodate for individual customer
requirements, or national radio licensing authority regulations, other frequencies outside this
range may be supplied as a customization with some limitations inside the 406 to 470 MHz
frequency band.
