User Manual

Useful functions

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Many repeaters require a CTCSS tone or a DCS encode setting as a “key” to access a repeater system, or a

receiver using CTCSS or DCS squelch, so called “selective-calling”. Sometimes, CTCSS or DCS decode

features are used on the output of a repeater so they can be used to open 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 combination of CTCSS squelch and DCS function is not available; only one or the other may

be used for given frequency.

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1. Press the FUNC key then press  key

while [FUNC] appears on the display. The

current tone frequency will be displayed.

Repeat pressing  key to select T/TSQL

and DCS change the tone frequency and

rotate the dial to change the frequency.

2. The numbers (such as 88.5) represent the

CTCSS frequency in HZ. When it is

displayed with the [T] icon only, the unit

transmit 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

[T SQL] icon shows up on the display.

This is the CTCSS decode frequency.

This enables CTCSS squelch (or Tone

Squelch, TSQL).

4. Press it again so that the 3-digit number

and [DCS] icon is displayed, and it

enables DCS encoding and decoding.

For 2-4, rotate the dial or press the UP/DOWN keys to change the tone or the code. Press any

key (other than , or UP/DOWN keys on the display) to exit the setting and return to the

original status. The [T], [ ] or [DCS] icon will remain on the display to show the current

status. To cancel, simply repeat the step 1 and select OFF then press any key (other than ,

or UP/DOWN keys on the display) to exit .

The CTCSS encoding and decoding frequencies maybe set differently. The encode setting

frequency automatically relates to the decode setting, but the decode setting does not affect

encoding. The standard sets of 39 different CTCSS tones are available as shown on the chart

below. DCS encode/decode cannot be separated and selectable from 105 codes as shown

below.

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