Axnes Polycon MP20-00U Owner's manual

Axnes Aviation AS
Polycon MP20 Series
Hand Held Radio
Installation and Operation
Document number:
AX-PSB-UMAN-0027
Revision:
Issue E
Date:
2015-03-05

Axnes Aviation AS
Document number
Revision
Date
AX-PSB-UMAN-0027
Issue E
2015-03-05
Page ii
Revision history
Revision
Date
Description
List of effective pages
Issue A
2011-06-30
First release of Installation
and Operation manual.
Replaces Operation manual
PUBL041-00 Issue 3
New document
Issue B
2011-09-07
Edit 1.6.3. Headset interface
1-6 ,1-7,1-8
Issue C
2011-12-05
Corrected date and issue
statement on first page and
all footers
First page and all footers
Issue D
2012-07-09
Added MP20-02DB-456
Updated for SW version 3
Page 1-5
Section 2
Section 3
Issue E
2015-03-05
Document title change
Added MP20-01U in text and
removed p/n list (table 1-1).
Charge time changed to 2-3H
Interchanged TX and RX
frequencies.
Channel separation corrected
to 25KHz only.
Added colour codes.
Front page
Page 1-5
Page 1-6: Charge time
Page 1-6: Frequency
Page 1-7: UHF xx frequency
Page 1-7: Channel separation
Page 1-7: Colour

Axnes Aviation AS
Document number
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Page iii
Table of contents
SECTION 1: GENERAL INFORMATION.................................................................................1-1
1.1 Introduction.......................................................................................................... 1-1
1.2 Mechanical description......................................................................................... 1-2
1.3 Connectors and Control Functions....................................................................... 1-3
1.4 Electrical and functional description ..................................................................... 1-4
1.5 Identification of article........................................................................................... 1-5
1.6 Technical data...................................................................................................... 1-6
1.6.1 Operation...................................................................................................... 1-6
1.6.2 Power supply ................................................................................................ 1-6
1.6.3 Headset interface.......................................................................................... 1-6
1.6.4 Helmet/headset Connectors.......................................................................... 1-7
1.6.5 Radio characteristics..................................................................................... 1-7
1.6.6 Dimensions................................................................................................... 1-7
1.6.7 Material......................................................................................................... 1-7
1.7 Type approvals and records................................................................................. 1-8
1.7.1 Type approvals.............................................................................................. 1-8
1.7.2 Type Records................................................................................................ 1-8
1.8 Accessories.......................................................................................................... 1-8
SECTION 2: INSTALLATION..................................................................................................2-1
2.1 General................................................................................................................ 2-1
2.2 Inspection before installation................................................................................ 2-1
2.3 Recommended maintenance................................................................................ 2-1
2.4 Mechanical installation......................................................................................... 2-2
2.5 Installation wiring consideration............................................................................ 2-2

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2.6 Dimensions Polycon MP20 series hand held radio............................................... 2-2
2.7 Location of connectors and pin assignment.......................................................... 2-3
2.7.1 Helmet/headset connection pin assignment.................................................. 2-3
2.8 Microphone compatibility...................................................................................... 2-3
2.9 Post installation calibration................................................................................... 2-4
SECTION 3: OPERATION ......................................................................................................3-1
3.1 MP20 series charging........................................................................................... 3-1
3.2 Power Up/Down Sequence .................................................................................. 3-1
3.3 Change channel................................................................................................... 3-2
3.4 Walkie-Talkie mode.............................................................................................. 3-2
3.5 Helmet/Headset connection ................................................................................. 3-2
3.6 NIVOX/Push to Talk (PTT) Operation................................................................... 3-3
3.7 Person to Person / Casualty Communication mode ............................................. 3-3
3.8 Display orientation................................................................................................ 3-4
3.9 Output Power Settings ......................................................................................... 3-4
3.10 Pressure Equalizing Actuator............................................................................... 3-5
3.11 Default Settings.................................................................................................... 3-5
3.11.1 Select NIVOX or PTT default......................................................................... 3-5
3.11.2 Squelch......................................................................................................... 3-6
3.11.3 Automatic Gain Control (AGC)...................................................................... 3-6
3.11.4 Analogue Trigger Level (NIVOX Threshold).................................................. 3-6
APPENDIX A CALIBRATION PARAMETERS......................................................................A

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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.

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This manual describes the installation and operation of the Polycon MP20 series hand held
radio. The Polycon MP20 series hand held radio will hereafter be referred to as MP20
1.2 Mechanical description
The outline of the mechanics is found in Figure 1-1.
The chassis is made out of painted saltwater resistant milled aluminium, and consist of two
main parts, a main body and a back plate.
Helmet/headset connection is located at the top of the MP20 together with a small display,
antenna and a pressure equalizer.
The channel selection buttons, a large Push to Talk (hereafter named PTT) button used
when connected to the helmet/headset, as well as integral microphone and loudspeaker is
located at the front of the MP20. Volume up/down and walkie talkie PTT is located at the left
hand side of the MP20.
Charging connector is located in the bottom of the radio.
The mechanics are designed to withstand the robust operating environment typical
demanded by winch/SAR operation.
The MP20s are designed with all control buttons flush mounted to the cabinet, protecting
them from both damage and accidental operation, whilst the form and position of the front
PTT key enables it to be operated with a wide variety of grip positions.
The MP20 consists of the following main circuit board modules and electronic components:
Radio module
Interface processing module
Display module
Side key module
Charger connector module
Battery

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Figure 1-1: MP20 outline
1.3 Connectors and Control Functions
Electrical connections to the MP20 are located on the top and bottom of the MP20. The
electrical connections consist of:
Waterproof 10 pin Fisher connector for helmet/headset connection.
Plate connector for charging
21/41 mm

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The control functions are as follows:
Display for channel indication, and configuration menu (located on top).
Channel selector (located on front).
Volume and power on/off (located on the left hand side).
Large PTT button for helmet/headset operation (located on front)
PTT button for walkie talkie operation (located on left-hand side)
Loudspeaker for walkie talkie operation (located on front)
Microphone for walkie talkie and casualty communication (located on front)
1.4 Electrical and functional description
The MP20 is the handheld unit in a wireless extended ICS system and interacts with the
Polycon 004RLI base station. A MP20 is typically connected to a winchman helmet/headset,
and implements the following features:
Wireless extension of aircraft’s intercom system with significant range and
robustness.
Range up to 10 nm line of sight over water, and good ability to penetrate into
structures.
Operating in half-duplex mode and utilizes the UHF band.
Support for selected Maritime VHF channels (MP20 dual band only)
Programmable with up to 16 channels.
NIVOX –Polycon patented VOX operation. Conventional Voice Operated
transmission (VOX) operates by opening transmission when input has reached a
certain level over a given period of time. This will normally cause ‘clipping’ of the first
word in the transmission, and may cause difficulty in differentiating between words
such as ‘No’ and ‘Go’. Polycon implements a Non Interrupted Voice Activated
transmission (NIVOX). Polycon NIVOX will ensure non-clipped transmission of all
input, and full words are transmitted, without the drawback of traditional VOX.
Adaptive NIVOX trigger level. The NIVOX will monitor the ambient noise, and through
this process avoid triggering transmission based on high background noise levels. A
given voice overlay to the noise is needed to trigger transmission. This functionality
secures that the intercom is not flooded with the background noise.
Easily available PTT button (designed for elbow operation)
Protected channel select buttons.
Protected Volume/power on/off buttons
“Low profile” antenna
Built-in loudspeaker and microphone for MP20 operation (Walkie-Talkie).
Intercom from integral microphone to helmet/headset earphones for casualty
communication.
Side mounted PTT key for MP20 operation (Walkie-Talkie)
Side-Tone function.
Rugged and salt water resistant aluminium enclosure.
Waterproof to 1 meter

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1.5 Identification of article
The MP20s are labelled with a part number. A standard unit operates in the UHF band at
419/409 MHz Rx/Tx, and will be labelled MP20-00U or MP20-01U for single band and MP20-
02DB-414 for the dual band. Other frequency combinations may be configured at customer
request and will be labelled MP20-00U-xxx or MP20-01U-xxx for single band and MP20-
02DB-xxx for dual band, where xxx denotes the centre frequency of the antenna.
Note: Some early units deviate from the product numbering scheme and a combination of the
product number and the antenna label must be used to identify the customer configuration.
Note: Some customer configured units deviate from the product numbering scheme and use
MP20-00U-xxx, were xxx represent an alphanumeric customer id. For those units the
combination of Tx and Rx is found in the datasheet supplied with the unit.

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1.6 Technical data
1.6.1 Operation
Radio:
Half duplex, dual frequency Rx/Tx
Frequency:
Tx:409±0.5 MHz Rx:419±0.5 MHz
VOX operation:
Axnes’patented NIVOX, ensures no loss and operation in
high noise environment
Number of wireless users:
Unlimited
Number of Radio channels:
Up to 16
Encryption:
None
Operating temperature:
-25°C to 55°C
Storage temperature:
-40°C to 85°C
Water resistance
IEC EN60529 Edition 2.1.2001:02 IPX7 Category 1 (1
metre)
Pressure to activate front PTT:
0.5 to 1.0 Kg (Withstands a temperature drop of at least
20°C).
1.6.2 Power supply
Supply voltage:
Battery operated at 4.8V (1460mAH NiMh)
Operating time:
10 hours standby
8 hours receive
1.3 hours transmit (400mW)
Charge time:
2-3 hours
Charger:
CHG1236 M/S
1.6.3 Headset interface
Microphone sensitivity:
MP20-02DB: 0.1 –60mVrms (0.3 –180mVpp)
MP20-00U: 0.1 –5mVrms (0.25 –15mVpp)
MP20-00U: S/N 020765, 020781 and after as MP20-
02DB.
Microphone input impedance:
136 Ω impedance balanced
Microphone bias:
4.1V through 2,7K series impedance (Mic+)
Power supply in connector:
MP20-02DB: 4.8V up to 40 mA
MP20-00U: Battery power through 1,5KΩseries resistor
MP20-00U: S/N 020765, 020781 and after as MP20-
02DB.
Headset output (mV rms):
Vol:
0
3
6
9
Open:
170
610
1030
1780
9 Ω:
105
385
650
1150
150 Ω:
160
590
995
1720
600 Ω:
167
605
1020
1770

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1.6.4 Helmet/headset Connectors
Connector on MP20:
Fisher DBEU1031A010-130
Compatible cable mount :
Fisher SE1031A010-130
1.6.5 Radio characteristics
UHF Tx frequency:
409 MHz (other frequencies as customer configurations)
UHF Rx frequency:
419 MHz (other frequencies as customer configurations)
UHF Duplex separation:
10 MHz
VHF Frequency band:
156-159 MHz (only MP20-02DB series)
Channels:
16
Channel separation:
25 KHz
Modulation:
FM
Frequency stability:
25 KHz +/- 5 ppm
Receiver sensitivity
<0.9 μV at 12 dB SINAD (single band)
Output power:
400 mW (other output power as customer configurations)
Deviation:
5 KHz
Antenna impedance
50 Ω
1.6.6 Dimensions
Physical dimensions:
112 x 65.5 x 35 mm
Weight:
395g
1.6.7 Material
Material:
Aluminium 5052 (Salt Water Resistant)
Paint:
Layer1: 2 comp. Wash primer CR, Sikkens/Akzo Nobel
Layer2: 2 comp. Auto Nova –None Sanding.
Sikkens/Akzo Nobel
Layer3: 2 comp. Cooler Polyurethane Sikkens BT,
Sikkens/Akzo Nobel
Colour
BT429DS(yellow)/BT499G3(grey)

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1.7 Type approvals and records
1.7.1 Type approvals
The Polycon MP20 series MP20s have been tested against general radio terminal
specifications, as defined in:
ETSI EN301 843-2 V1.1.1 Electro Magnetic Compatibility (EMC) standard for marine
radio equipment and services; Part 2: Specific conditions for radiotelephone
transmitters and receivers
ETSI EN 300 720-2 V1.2.1 Ultra-High Frequency (UHF) on-board vessels
communications systems and equipment; Part 2: Harmonized EN under article 3.2 of
the R&TTE Directive
ETSI EN 300 178-1 V1.3.1 Portable Very High Frequency (VHF) radiotelephone
equipment for the maritime mobile service operating in the VHF bands (for non-
GMDSS applications only)
IEC EN 60529 Edition 2.1 2001-02 Degrees of Protection Provided by Enclosures (IP
code): IPX7 Category 1
IEC EN 60950-1:2006 Information technology equipment –Safety
1.7.2 Type Records
The Design Authority will submit a Declaration of Design Performance (DDP).
The DDP will reference the following:
Design Specification.
Equipment Specification Number and Issue Number.
General Assembly Drawings and Aircraft Equipment installation information.
Master Record Index.
List of Type Test Reports.
1.8 Accessories
Article
Part no:
Battery charger CHG1236M/S
AX-CHG-0010
Battery charger CHG1236M/S, power supply w/AUS plug
AX-CHG-0020
Battery charger CHG1236M/S, power supply w/EU plug
AX-CHG-0030
Battery charger CHG1236M/S, power supply w/UK plug
AX-CHG-0040
Battery charger CHG1236M/S, power supply w/US plug
AX-CHG-0050
Table 1-1: Accessories
Axnes Aviation can supply a number of accessories related to MP20 series handheld radios,
ranging from adaptor cables to helmets. For details please visit:
http:\\www.axnes.com\products

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Section 2: Installation
2.1 General
The MP20 series handheld radios do not require any installation, but depending on aircraft,
operational environment and microphone configuration, some radio parameters may need
adjustment to ensure optimal performance.
Care should be taken when selecting helmet/headset microphone to ensure Polycon MP 20
compatibility.
2.2 Inspection before installation
Before taking MP20 radios into use, carry out visual inspection for any transport damage,
paying particular attention to the following:
- Dirt, dents, scratches, corrosion, broken attaching parts on the housing and housing parts.
- Dirt and scratches on the identification plate, and marking.
- Dirt, bent or broken pins, cracked connector inserts.
- Missing screws or pressure relief pin.
2.3 Recommended maintenance
The MP20 should be serviced by an Axnes Aviation certified service centre according to the
recommended maintenance schedule. Recommended according to service letter published
at Axnes resource website:
http://www.axnes.com/resource-center/service-letters/
Axnes Aviation certified service centres are found at:
http:\\www.axnes.com\support
or contact Axnes Aviation A/S at:
Phone: [phone]
FAX: [phone]
E-mail: [e-mail]
The MP20 hand held radio should always be thoroughly cleaned and stored in a dry and
ventilated location. After use, immersion in salt water or exposure to salt laden or dusty
atmosphere, the hand held radio must be washed in clean running water and dried off with a
soft cloth.

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Plug connections should be blown dry with clean dry air (low pressure) and protected with
acid-free Silicone grease Type “NOVA G624” or similar after drying. Always recharge the
hand held radio after use.
Although the connector arrangement is a waterproof type, under certain circumstances it is
possible for water to seep between the plug and the socket, causing undesirable
interference. This may be avoided by liberal application of silicone grease.
Do not carry the radio by the helmet/headset connecting lead.
Do not try to disconnect the helmet/headset connector by snatching or pulling the lead.
The radio should be secured to the vest or pocket by means of a lanyard connected to the
dedicated lanyard ring on the radio back plate.
If the MP20 is not operating normally, check indicator lights and channel settings. Check also
connectors for proper attachment.
A malfunction may also be corrected by switching the system OFF for a few seconds and
then ON again.
If you have trouble making the MP20 operate and before declaring the unit unserviceable, it
is recommended to go through the reset procedure found in the document “AX-SVS-PRC-
0002 Reset Procedure”. This procedure will restore the unit to factory defaults and possibly
clear any setting made accidentally, causing the unit not to operate properly. The reset
document can be downloaded from:
http:\\www.axnes.com\support
All repairs are to be undertaken by Axnes Aviation A/S certified repair centres only.
2.4 Mechanical installation
No mechanical installation of MP 20 is required.
The radio, including the batteries, is capable of immediate use even after storage in its
original packing for up to 2 years at temperatures within the range -40°C to +50°C. However
the equipment should first allow being acclimatised to within the operational temperature
range (-25°C to +55°C).
2.5 Installation wiring consideration
No aircraft wiring is needed for the installation of the MP20 series radio.
2.6 Dimensions Polycon MP20 series hand held radio
Please Refer to Figure 1-1: MP20 outline.

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2.7 Location of connectors and pin assignment
MP20 series has two connectors, one for helmet/headset and one for charging.
Charging connector is located in the bottom of the unit and is of the plate type. The
helmet/headset connector is located at the top of the unit. Both connections are water proof.
2.7.1 Helmet/headset connection pin assignment
The helmet/headset connector pin-out is listed in Table 2-1: 10 Pin waterproof
helmet/headset connector. For electrical specification of the pins, please refer to 1.6.3
Headset interface.
Pin
Function
1
Mic+
2
Mic-
3
Speaker +
4
Speaker -
5
GND
6
Manufacturing use
7
Manufacturing use
8
Manufacturing use/PTT1
9
DC out
10
Manufacturing use
Table 2-1: 10 Pin waterproof helmet/headset connector
The connector on the Polycon MP20 is:
Water proof Fisher 10 Pin, panel mount, part no.: AX-CON-0010 (alt. part no.:
DBEU1031A010-130).
The compatible connector for helmet/headset wiring:
Water proof Fisher 10 Pin plug, cable mount, part no.: AX-CON-0010 (alt. part no.:
SE1031A010-130).
2.8 Microphone compatibility
Care should be taken when selecting a microphone to be used with the MP20s. The MP20
input levels are specified in technical data section 1.6.3. It should be noted the supply
voltage to bias the microphone is limited.
1
Valid for units with software version 3.0 or higher. Units with software version 3.0 or higher will show
the software version as two digits in the display at startup.

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The MP20 will detect a headset/helmet connection through a change of the impedance over
the microphone terminals. The DC resistance trough the microphone line is required to be
less than 10 kΩ.
Note: Some types of electret microphones change their DC resistance when subjected to
very high sound input. This can cause the impedance to go over the threshold of the
headset/helmet operation mode (10K).
2.9 Post installation calibration
When the MP20 is taken into use, normally no adjustments are needed, and factory values
can be used. In some cases adjustment might be needed as listed below:
White noise in headset. Adjust the squelch –Pre software version 3.0
2
:To adapt the
squelch on the Polycon MP20, press the large front PTT button and simultaneous operate
‘volume up’ or ‘volume down’. Squelch setting is displayed in the display.
Software version 3.02and higher: Press the Volume up and Channel down once
simultaneously to enter menu mode. To browse through the menu press channel up/down.
Select option ‘’ SL’’ – the display will change to display the value of the set squelch level. The
squelch level can be adjusted by using the Vol up / down buttons to set as required.
When optimal level is found press the side PTT button to save and exit.
It is recommended to note down the optimal level for future reference in the calibration
parameter sheet found in Appendix A.
Factory squelch level: Individual values, normally between 18-21.
NIVOX transmission from Polycon MP20 series hand held radio not triggered or
triggered by noise. Adjust Analogue trigger level –Analogue trigger level is the level of the
voice on top of the background noise needed to trigger VOX transmission. Lowering the
analogue trigger level will make the VOX operation of the radio more sensitive to rapid
changes in the background noise, and will require a lower voice overlay level to trigger
transmission. Increasing the setting will make the radio VOX operation more robust to rapid
changes in the background noise, but will require higher levels of voice overlay to trigger
transmission.
Note: The when the noise environment or analogue level change the radio needs a few
seconds to adapt the new noise level. It is recommended to adjust the analogue level in a
noise environment similar to the operational environment.
To adjust the analogue trigger level, press the Volume up and Channel down once
simultaneously to enter menu mode.To browse through the menu press channel up/down.
Select option ‘’AL’’ – the display will change to display the value of the set analogue level.
The analogues level can be adjusted by using the Vol up / down buttons to set as required.
2
Units with software version 3.0 or higher will show the software version as two digits in the display at
startup.

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When optimal level is found press the side PTT button to save and exit.
The standard factory setting is 78, but this does depend on the type and output of the
microphone used and the noise levels in the operating environment.
Experience has showed that a value between 60 and 80 will work in most cases. When the
optimal level has been found, it should be used as the new default setting. It is
recommended to note down the optimal level for future reference in the calibration parameter
sheet found in Appendix A.
Factory setting AL: 78.

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