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another party on the same main channel using the same subcode. (This
filters out unwanted transmissions without the same coded squelch tone).
There are 38 CTCSS Sub-channels for each main channel. A different
subcode may be selected for each of the 14 channels.
To change the CTCSS Sub-channel:
- From GMRS/FRS 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 FRS units, they must be switched to
the same channel and CTCSS subcode. To communicate with
other FRS 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 on the GMRS channels. (FRS only channels 8-14 automatically
operate on low power only.) Using low power, the unit will have a
lower transmit range, but battery life will be increased.
NOTE: You will find that for the majority of your needs, the low-power
setting will provide adequate communications on all channels;
there should seldom be any need to use high power, except in
situations where you need absolute maximum range. Using low
power will greatly extend battery life. We suggest you experi-
ment with switching between low and high power. However,