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CTCSS Mode (Sub-Channel) Selection
The Coded Tone Controlled Squelch System (CTCSS) provides 38 Sub-Fre-
quencies. This feature allows you to utilize the coded squelch tones (01–
38) within a main channel to communicate with another party on the same
main channel using the same subcode. (This filters out unwanted trans-
missions without the same coded squelch tone). There are 38 CTCSS
Sub-channels for each main channel. A different subcode may be se-
lected for each of the 15 channels.
To change the CTCSS Sub-channel:
- From GMRS standby mode, press the MODE Button twice; a flashing
oF or sub-channel number is displayed, together with the flashing
CTC icon. If oF is displayed, press the Up or Down button to enable
the CTCSS mode; the CTC icon will also flash on the display with the
flashing sub-channel number.
- Then press the Up or Down button to select the desired sub-channel
for use.
- Press the PTT button momentarily to confirm selection.
The CTCSS mode can be turned off by selecting the oF icon as the setting.
NOTE: To communicate with other GMRS units, they must be switched to
the same channel and CTCSS subcode. To communicate with
other GMRS units that do not have subcodes, switch your unit to
the same channel with the subcode set to oF.
The CTCSS subcodes do not prevent others from hearing your
transmission. This will only allow you to ignore all traffic on a
given channel not using the same subcode.
Transmit Power Selection Mode
This feature permits selection of the transmitting power level to high or
low. Using low power, the unit will have a lower transmit range but
battery life will be increased. (Refer to page 2 for Power Setting notes.)
To access the transmitter power selection function:
- From GMRS standby mode, press the MODE Button three times
until the Po icon appears with a flashing HI or Lo indication on the
display.