Uniden UBC125XLT, Руководство пользователя, Страница: 16 / 72

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construction job sites, and with inexpensive consumer radios
such as PMR radios. The range is typically 1-8 miles, depending
upon the terrain and many other factors.
Repeater Operation
Repeater systems use two frequencies: one transmits from the
radio to a central repeater; the other transmits from the repeater
to other radios in the system. With a repeater-based system, the
repeater is located on top of a tall building or on a radio tower
that provides great visibility to the area of operation.
When a user transmits (on an input frequency), the signal is
picked up by the repeater and retransmitted (on an output
frequency). The user’s radios always listen for activity on the
output frequency and transmit on the input frequency. Since
the repeater is located very high, there is a very large line of
sight. Typical repeater systems provide coverage out to about a
35-kilometer radius from the repeater location.
UNDERSTANDING BANKS
Channel Storage Banks
To make it easier to identify and select the channels you want to
listen to, the 500 channels are divided into 10 channel storage
banks containing 50 channels each. You could use each channel
storage bank to group frequencies by department, location, area
of interest, or any other way you prefer. You can listen to any or
all of the banks by using the number keys to turn them on or off .
Service Search Banks
The scanner is preprogrammed with many of the frequencies
allocated to Emergency, Freenet, PMR, Marine, Aircraft, CB radio
and HAM radio services. There are 7 banks allocated for these
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