17
Operation
UNIDEN UH078SX-NB
Handheld UHF-CB Transceiver
Using a Repeater Channel
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 (i.e.
a Tall Building) that partially blocks your transmitted signal, the possibility
of the other radio receiving the signal is very slim. Valleys, metallic
structures, etc., tend to act as a screen between radios.
Standard Operation without the aid of a Repeater Station
Operation with the aid of a Repeater
With Duplex operation, the signal coming from your radio is received
by the Repeater station and then re-transmitted at the same time on
another channel.
Your UH078SX-NB is designed with duplex capability on Channels 1 to 8
and Channels 41 to 48. When any of these channels are set to operate in
duplex mode during transmission, the UH078SX-NB automatically sends
the signal at a frequency 30 channels above the original in order to access
the repeater station. After transmitting, the radio reverts back to its original
operating frequency.
For example:
1. CH01 is on Duplex Mode - will receive on CH01 but transmit on CH31
2. CH02 is on Duplex Mode - will receive on CH02 but transmit on CH32,
etc... Refer to UHF-CB Channel & Frequencies table on p.28 - p.29.
