Ctcss / Dcs Setting - Alinco DR-135TMkIII Instruction Manual

NOTE: It is practical to use the memory mode to operate repeaters by programming the shift and offset settings
into the memory channels (P.22).

CTCSS / DCS setting

Many repeaters require a CTCSS tone or a DCS code encode setting as a "key" to access the
system, so-called "selective-calling". Sometimes, CTCSS or DCS decode features are used on the
output of a repeater so they can be used as a squelch. In this mode, regardless of the main squelch
status, the audio can be heard ONLY when the matching tone/code signal is received. The combi-
nation of CTCSS squelch and DCS function is not available; only one or the other may be used for
a given memory channel.
1.
Press TS/DCS key. The current setting will be
displayed with T/SQ/DCS icons and relative
frequency/code. Press the same key to select
T/SQ/DCS setting.
2.
The numbers (such as 88.5) represent the CTCSS frequency in Hz. When it is dis-
played with the T icon only, the unit transmits the sub-audible tone while the PTT is
pressed (encode) and the repeater access is enabled (assuming the repeater is using
88.5).
3.
Press the same key again so that the SQ icon shows up on the display. This is the
CTCSS decode frequency. This enables CTCSS squelch (or Tone Squelch, TSQ).
4.
Press it again so that the 3-digit number and DCS icon is displayed. This is the DCS
code, and it enables DCS encoding and decoding.
For 2 - 4, rotate the main dial or press the UP/DOWN keys to change tone or code. Press any key
(Except TS/DCS, UP/DOWN keys) to enter the setting and return to original status. The T/SQ/
DCS icon will remain on the display to show the current status. To exit, simply use the TS/DCS key
and press it until the relative status icon T/SQ/DCS disappears.
The CTCSS encoding and decoding frequencies may be set differently. The encode setting fre-
quency automatically relates to the decode setting, but decode setting does not affect encode. The
standard set of 39 different CTCSS tones are available as shown on the chart below. DCS encode/
decode cannot be separated and are selectable from 104 codes as shown below.
67.0 69.3
82.5 85.4
100.0 103.5
123.0 127.3
151.4 156.7
186.2 192.8
233.6 241.8
CTCSS Tone Frequency(Hz)
71.9 74.4 77.0 79.7
88.5 91.5 94.8 97.4
107.2 110.9 114.8 118.8
131.8 136.5 141.3 146.2
162.2 167.9 173.8 179.9
203.5 210.7 218.1 225.7
250.3
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
413 423 431 432 445 446 452 454 455 462 464
465 466 503 506 516 523 526 532 546 565 606
612 624 627 631 632 654 662 664 703 712 723
731 732 734 743 754
DCS Codes
5. Basic Operation
T T/SQ DCS
023
88.5 88.5
The original status
21