Understanding scanning – Uniden BC246T User Manual
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Understanding Scanning
frequency. The stations might even interfere with each
other to the point where it is impossible to clearly receive
any of the stations. A scanner equipped with CTCSS and
DCS (like your scanner) can code each received
frequency with a specific CTCSS or DCS frequency.
Then, when you receive multiple signals, you only hear
the transmission with the CTCSS or DCS tone you
programmed. If you do not receive the correct tone with a
signal, the scanner’s squelch remains closed and you
hear nothing.
You can search for the following CTCSS frequencies and
DCS codes.
CTCSS Frequencies (Hz)
DCS Codes (Octal)
67.0
69.3 71.9 74.4
77.0
79.7
82.5
85.4 88.5 91.5
94.8
97.4
100.0
103.5 107.2 110.9
114.8
118.8
123.0
127.3 131.8 136.5
141.3
146.2
151.4
156.7 159.8 162.2
165.5
167.9
171.3
173.8 177.3 179.9
183.5
186.2
189.9
192.8 196.6 199.5
203.5
206.5
210.7
218.1 225.7 229.1
233.6
241.8
250.3 254.1
023 025 026
031
032
036 043 047
051 053 054
065
071
072 073 074
114 115 116
122
125
131 132 134
143 145 152
155
156
162 165 172
174 205 212
223
225
226 243 244
245 246 251
252
255
261 263 265
266 271 274
306
311
315 325 331
332 343 346
351
356
364 365 371
411 412 413
423
431
432 445 446