User's Manual Part 2

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 frequency.

Selective Communication

Tone-squelch (CTCSS) and DCS

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 displayed

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 38 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 and following page.

88.5

T/SQ

88.5

DCS

023

The original status

67.0 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

156.7 162.2 167.9 173.8 179.9 186.2 192.8 203.5

210.7 218.1 225.7 233.6 241.8 250.3