mcmurdo R1 User manual

R1 Radio
Service Manual
84-103M

Commercial in confidence 84-103M
R1 radio service manual Issue 2
Table of Contents
1. Introduction........................................................................................................ 1
1.1. Scope ............................................................................................................... 1
1.2. Applicability ....................................................................................................... 1
1.3. Safety information ............................................................................................. 2
2. Maintenance schedules..................................................................................... 3
2.1. Routine testing .................................................................................................. 3
3. Maintenance tasks ............................................................................................. 5
3.1. Mechanical inspection ...................................................................................... 5
3.2. Functional testing.............................................................................................. 5
3.3. Battery replacement .......................................................................................... 6
4. Appendix 1: Specification ................................................................................. 7
This document is McMurdo Limited copyright (©) and contains proprietary owned intellectual property rights and confidential
data. All rights are strictly reserved. The information must not be used except for the agreed purpose. Unauthorised use,
reproduction or issue to any third party is not permitted without the prior written authority of McMurdo Limited. This document
is to be returned to McMurdo Limited when the agreed
purpose is fulfilled.

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1. INTRODUCTION
The R1 radio is designed specifically to exceed the IMO requirements for GMDSS
survival craft radios.
The radio is totally waterproof and sufficiently robust to survive marine environments,
and is designed to be a'fit and forget' equipment.
1.1. Scope
This manual provides the complete instructions issued to shore-based maintenance
(SBM) providers to enable routine and emergency servicing of the radio equipment
listed below.
1.2. Applicability
This information applies to the following radio equipments:
iMcMurdo R1 VHF Radio (English, French &German labelling)
iSea 103 VHF Radio
iSOS Rescue VHF Radio

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1.3. Safety information
Please read the following for your safety:
This product has been assessed as presenting negligible hazard in asealed
serviceable state.
Safety analysis
The following table summarises the nature of the hazard which may be present when
the unit is opened or serviced; each hazard is discussed at greater length in the
detailed sections.
Hazard cause
Hazard identification
Precautions
Lithium battery Explosive risk, corrosive fumes,
fire, biological hazard Handle appropriately, avoid contact
Radio frequency
radiation Physiological hazard Avoid close or prolonged exposure
Lithium batteries
Hazardous chemicals Wear gloves
The batteries used in these products contain Lithium (Li). Lithium is inflammable,
reacts violently with water and constitutes abiological hazard. These batteries are
HAZARDOUS if short-circuited, punctured, incinerated or deformed.
Lithium batteries must not be short circuited.
Lithium batteries must be handled, transported and disposed of using appropriate
safety precautions. The use of rubber gloves as aroutine precaution is
recommended.
In the event of leakage of the battery electrolyte (which can be recognised by a
pungent odour), take care to avoid contact, particularly with open wounds; do not
ingest the material. Do not attempt to discharge aleaking battery –remove it using
appropriate handling materials and seal in aplastic bag, then dispose of it through an
approved environmental disposal agent, or in accordance with local regulations.
Radio frequency radiation
Radio frequency radiation
Ahandheld VHF radio produces radio frequency radiation when it transmits. The
radiated level is up to 5W for the duration of the transmission. This is above the risk
threshold in some countries. Exposure should be limited. Keep transmissions short.

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2. MAINTENANCE SCHEDULES
2.1. Routine testing
The R1 radio is designed to require no routine servicing.
Maintenance is restricted to avisual inspection of the radio, and to ensuring that the
battery storage lifetime is not exceeded.

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3. MAINTENANCE TASKS
3.1. Mechanical inspection
Mechanical inspection is amatter of checking that there is no visible damage to the
radio, including the antenna, and to the mounting bracket.
3.2. Functional testing
Functional testing verifies the operation of every control, and checks that the radio
operates satisfactory on each channel.
Test battery
The battery fitted to the radio must NOT be used for functional testing. It must be
removed and asubstitute battery used for the duration of the tests.
Asuitable battery is the test battery, part number 84-102, or astandard battery which
is reserved for functional testing only (and which is so marked).
Operation of controls
The following section verifies the operation of each control, by describing the effect of
the control. The checks should be made in the order given. (It is obvious that the
radio must be ON before the operation of any other control can be checked.)
ON/OFF Pressing the ON/OFF button
should cause the radio to switch on. The LED
indicating Channel 16 should illuminate, the
speaker should produce noise (or asignal), and
this should reduce after 2seconds when the
automatic squelch operates. Pressing the button
again should turn off the radio.
Squelch Operating this button when no
signal (ie just noise) is being received should
cause the emitted sound to become much
quieter and much louder alternately.
Volume UP and DOWN These buttons should
change the volume of sound emitted by the
radio. (It may be necessary to press the Squelch
button first to produce the maximum sound.)
Channel selectors Pressing the channel
selection buttons should cause the LED
indicator (beside the button) for that channel to
flash.
Press to talk (PTT) Operating this switch
should cause the TX LED to illuminate.

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Functional test
WARNING: Regulations for the use of GMDSS equipment require that the operators
of these radios must be authorised to use them; the Regulations also specify the
environments in which the radios may be used.
The functional test involves verifying the operation of the radio on all three
communication channels.
Another radio, which is known to be operational and which covers Channels 6, 13
and 16, is required for this test. Note that this radio does not have to be aModel R1,
although testing is simplified if this is the case.
The two radios should be separated by aconvenient distance (in excess of 10m is
recommended) and two-way communication should be established. This
communication must then be checked on all three channels.
Regulations require that test calls on Channel 16 must be limited to amaximum
duration of 10 seconds.
3.3. Battery replacement
The radio battery is asingle component. There are two versions to match the two
colours of radio:
Part number 84-100 (orange) for McMurdo R1 radio
Part number 84-101 (yellow) for SOS Rescue radio
The battery has astorage life of 4years, and should be replaced if its expiry date is
prior to the next scheduled inspection of the radio, if the seal on the battery is broken
or missing, or after the radio has been used.
Disposal of batteries
Lithium battery packs should be discharged slowly, then disposed of through an
approved environmental disposal agent, or in accordance with local regulations.
The rate of discharge must not exceed 100mA. It is recommended to discharge
through aresistance of aminimum value of 10 ohms per volt of the nominal battery
voltage eg aresistor of 100 ohms (2W rating) is satisfactory for a9V battery.
UNDER NO CIRCUMSTANCE MAY THE BATTERY BE SHORT-CIRCUITED.
If the battery shows signs of electrolyte leakage, do not attempt to discharge. Refer to
the Warnings section for advice on correct handling.
Use gloves Hazardous chemicals

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4. APPENDIX 1: SPECIFICATION
Frequency Channels 6, 13, 16
Transmit
Output power 0.5W ERP
Current consumption 350mA
Spurious emissions -70dB
Receive
Sensitivity <0.5uV for 20dB sinad
Adjacent channel sensitivity 70dB
Intermodulation 70dB
Spurious emissions 2nW
Audio output power 0.4W (1kHz tone, 3kHz deviation)
Current consumption 150mA at rated audio power
10mA squelched
Battery Lithium primary battery
Battery storage life 4years
Battery life 12 hours (10/10/80 duty cycle –
transmit/receive/squelched)
Weight 400g
Water resistance Waterproof to 1m
Buoyancy Floats

McMurdo Limited
Rodney Road Portsmouth PO4 8SG United Kingdom
Telephone: Int [phone]
Fax: Int [phone]
WebSites: www.mcmurdo.co.uk &www.pwss.com
84-103M Issue 2
CHEMRING GROUP PLC