The black rubber washers are to be placed between the radio and mounting bracket to provide resistance to movement but still allow the position of the radio to be adjusted.

If you are using channels 1 to 8 or 41 to 48 you could be transmitting in Duplex mode, turn DPX off or move to another channel.

CTCSS, or Continuous Tone Coded Squelching System, is an option that allows your UHF radio(s) to only pick up radio signals preceded by a “code”. This option helps to cut down on unwanted radio chatter. This is also known as PL, Private Line, Channel Guard, etc.

Check the power lead (wire harness) and fuse.

The type of antenna you use and where it is mounted on your vehicle will affect the range. A Low gain antenna will give you less range but wider coverage. A high gain antenna will give you greater range but it produces a narrower field which is more directional. Mounting the antenna low on the vehicle will shield the transmission in the directions close to the vehicle, so ideally the antenna needs to be mounted as high as possible.

Many factors affect how far a UHF radio will transmit including power of the radio and the environment in which it’s used (e.g. buildings, mountainous and surrounding vegetation can cause range problems).

A Repeater is a Radio Relay Station. It is used when the radio signal needs to be magnified to get the desired distance coverage. It works by receiving a radio signal from one unit, magnifying it and retransmitting the signal to another radio unit. It would be used in an area where coverage was hindered by terrain, buildings or other environmental conditions.

There is a list of repeater stations across Australia. This list and the operational status of the repeaters can change so please check with the ACMA for the latest information on repeaters.

All Oricom products are approved for use in Australia and NZ only, and although they will still work in other countries, they may not meet that countries requirement’s for voltage, operating frequencies or power RF levels and if used may interfere with other services which could attract penalties from the local administration authorities.