Tone
• Two of the possible signaling formats available on the IC-746PRO
is CTCSS
and DTCS.
• Tone squelch or CTCSS
operation is a method of communications
using selective calling. Only received signal having a matching
tone will open the squelch.
• DTCS
function is an another method of communications using
selective calling. Only received signal having a matching 3-digit
code will open the squelch.
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