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Uniden UBC125XLT Manual

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with a signal, the scanner’s squelch remains closed and you hear
nothing.
Refer to the Reference section of this manual for tables showing
the available CTCSS frequencies and DCS codes.
Conventional Scanning
Conventional scanning is a relatively simple concept. Each
group of users in a conventional system is assigned a single
frequency (for simplex systems) or two frequencies (for repeater
systems). Any time one of them transmits, their transmission
always goes out on the same frequency. Up until the late 1980’s
this was the primary way that radio systems operated.
Even today, there are many 2-way radio users who operate using
a conventional system:
• Aircraft
• Amateur radio
• PMR users
• Many business radio users
When you want to store a conventional system, all you need
to know is the frequencies they operate on. When you are
scanning a conventional system, the scanner stops very brie y
on each channel to see if there is activity. If there isn’t, the
scanner quickly moves to the next channel. If there is, then the
scanner pauses on the transmission until it is over.
Simplex Operation
Simplex systems use a single frequency for both transmit and
receive. Most radios using this type of operation are limited to
line-of-sight operation. This type of radio is frequently used at
UB374ZV_UBC125XLT_130329.indd 15UB374ZV_UBC125XLT_130329.indd 15 2013/03/29 10:34:502013/03/29 10:34:50
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  • Why is the volume very low on my scanner?.Unable to hear anything,but when I insert headphones the volume is very loud Submitted on 27-6-2023 at 13:02

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  • When I press scan it only moves on to the next frequency I have stored and the next and so on. It does not scan the frequencies. Any ideas Submitted on 3-4-2020 at 01:07

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