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Beyond the Basics
CTCSS and DCS
Your PRO-97 scanner features an advanced, DSP based
CTCSS and DCS decoder. CTCSS and DCS allow you to
program frequencies into your scanner that are used by more
than one group in your area and listen only to the group that
is of interest to you by specifying the group’s specifi c CTCSS
or DCS code. CTCSS and DCS can also help reduce instances
where interfering signals cause your scanner to stop on one
channel.
There are two ways you can program your scanner to
operate with CTCSS and DCS. If you know the CTCSS or DCS
code that is used on a particular frequency, you can manually
enter the code when you are programming the scanner, or
any time afterwards.
You can also set a special search code up that will instantly
decode the CTCSS or DCS code on a received transmission.
Channels programmed with the search code will receive all
traffi c on the channel, and will instantly decode and display
any CTCSS or DCS code that is found with the transmission.
You can then store the found code in the channel memory
with one keystroke.
This section of the manual describes the process for
confi guring a memory channel for CTCSS or DCS operation
and manually programming a known code. For more
information on using the CTCSS and DCS feature while
scanning, see “Using CTCSS and DCS”.
To program channel memories for CTCSS or DCS operation,
follow these steps:
1. First, enter a conventional frequency. See “Storing Known
Frequencies into Channels”.
2. Once you have entered the frequency, press MODE until the
desired mode appears in the upper left hand corner of the
display. Use CT for CTCSS, and DC for DCS.