11
Operation
UNIDEN UH089NB UHF CB Transceiver
Transmitting
The UH089NB uses the 80 UHF-CB Channels
For your reference a list of the available
channels, corresponding frequencies and
guidelines for their use and selection is
printed on page 20. For Australia, Channels
05 and 35 are reserved for Emergency Calls.
Select the desired channel. Press the
microphone’s PTT button and speak normally
into the microphone. Hold it approx. 7cm from
your mouth. Release the PTT button to end the
transmission and listen for a reply.
Call Function
Press the microphone Call Button. A two or three second ringing tone
will be transmitted. You may select from 5 types of tones (see p.16).
Current regulations require calling tones to be restricted to one
transmission per minute. If a second transmission is attempted
within one minute then an error tone will sound.
Using Repeater Channels
UHF CB repeaters are used to retransmit or relay your signal. Repeaters
will extend the range of your radio and overcome the shielding effect
caused by solid obstructions. In normal Simplex operation, your radio
transmits on one particular frequency and receives on that same
frequency. If there is a barrier that partially blocks your transmitted
signal, the probability of another radio receiving the signal is very slim.
Hills, tall buildings, metallic structures,...etc tend to act as a screen
between radios.
PTT CALL
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