Alinco DR-435T - CTCSS;DCS Configuration

5. Basic Operation
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.
I. Press TS/DCS key. The current setting will be = 8G aes
displayed with T/SQ/DCS icons and relative [" 985 985 023
frequency/code. Press the same key to select
T/SQ/DCS setting.
The original status
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/TQ/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.
CTCSS Tone Frequency(Hz)
DCS Codes
“NOTE: Depending on the deviation level of the incoming DCS coded-signal, your radio may not open the OCS
16
squelch. if this occurs, return to DCS setting mode and press the CALL key. A decimal point appears on
the. 10 MHz order; then set the desired code. This setting can also be stored.in a memory channel.