1 Chapter 4 Radio Equipment

1 Types Of Equipment  Range from: HF (High Frequency)HF (High Frequency) VHF (Very High Frequency)VHF (Very High Frequency) UHF (Ultra high Frequency)UHF (Ultra high Frequency)  VHF & UHF are more popular  Radio sets often referred to as Transceivers  They contain both a Transmitter & Receiver

1 Base Stations  Fixed Installations  VHF/UHF Range of around 50 Km  HF UK Wide and further

1 Vehicle Equipment  Typical Vehicle installation Uses vehicle batteryUses vehicle battery Better aerial than hand held radioBetter aerial than hand held radio Power output a little less than Base StationsPower output a little less than Base Stations Range – up to 30 kmRange – up to 30 km

1 Hand Portable  Very Short Range  About 1 to 5 Km  They use a rechargeable battery  Battery Life around 6-8 hours

1 Hand Portable Battery Life ◊ To extend battery life Keep transmissions short Use low power setting when possible

1 Safety Precautions NEVER û Carry loose batteries in pockets or bags û Short the terminals together ALWAYS Cover battery terminals in transit or when not in use Charge with the correct type of charger for correct time

1 Safety Precautions  Contain substances harmful to environment  Dispose of responsibly Batteries

1 Operating Range  Frequency  Power  Receiver  Aerial Efficiency  Atmospheric conditions  Position of Aerial Main factors about range

1 Aerial Position  Buildings  Metal Objects  Hills  Trees in leaf Things which can reduce Range

1 Aerial Position How to Increase Range High GroundHigh Ground Professionally Installed MastProfessionally Installed Mast Keep Away from Power LinesKeep Away from Power Lines Working with masts must be properly supervised at all times!Working with masts must be properly supervised at all times!

1 Radio Relay

1 Equipment  These are very varied  Your will be briefed accordingly Equipments in use

1 Equipment û Hold Set by the Aerial û Leave a Radio Unattended û Alter Settings unless instructed û Transmit Close to Another Radio Switch off After Use Keep Dry and Clean Turn off other sets at same location on same channel NEVER ALWAYS

1 Safety  Keep it Safe  Do not take unnecessary risks  Be responsible for everyone's safety  Risk Assessments must be in place  Familiarise yourself with the Assessments

1 Safety End