Post by Kam on Mar 13, 2019 23:23:47 GMT -8
When you are looking to buy two-way radios, you will see the terms CTCSS and DCS on their description,
But what do these terms mean?
Let go ahead to learn more about them:
CTCSS and DCS are systems used to ignore other users who you may be sharing a radio channel with.
These two systems are also referred to by other names, including CDCSS, PL, and DPL, but the official terms are CTCSS and DCS.
They both have the same function and work in similar ways.
CTCSS stands for Continuous Tone Coded Squelch System. Basically what it does is this: it adds a tone into your transmission at a certain frequency.
Other radios must have the same CTCSS tone or code set to hear the transmission. It will also be heard if the radio has CTCSS and DCS off.
Different CTCSS codes have different frequencies, and this is how it filters out other people -
as long as they have a different CTCSS or no CTCSS, then your radio will not pass any audio to the speaker.
CTCSS has 50 built-in tones:
DCS works the same, apart from it being digital instead. It stands for Digitally Coded Squelch.
It sends a number repeatedly encoded in digital as you speak, in the low frequencies so you do not hear it.
If someone else transmits on the channel with a different or no DCS, the radio will not unmute.
If they transmit with the same DCS as you, then your radio will unmute. DCS is newer than CTCSS and has more combinations.
DCS has 104 built-in codes:
They may also be called "Privacy tones" or Privacy codes" but CTCSS and DCS don't stop anyone from listening to you,
they just stop you from hearing unexpected communication. If someone has a radio with no CTCSS and DCS on,
they will be able to hear everyone on the channel, including people using CTCSS and DCS.
But what do these terms mean?
Let go ahead to learn more about them:
CTCSS and DCS are systems used to ignore other users who you may be sharing a radio channel with.
These two systems are also referred to by other names, including CDCSS, PL, and DPL, but the official terms are CTCSS and DCS.
They both have the same function and work in similar ways.
CTCSS stands for Continuous Tone Coded Squelch System. Basically what it does is this: it adds a tone into your transmission at a certain frequency.
Other radios must have the same CTCSS tone or code set to hear the transmission. It will also be heard if the radio has CTCSS and DCS off.
Different CTCSS codes have different frequencies, and this is how it filters out other people -
as long as they have a different CTCSS or no CTCSS, then your radio will not pass any audio to the speaker.
CTCSS has 50 built-in tones:
DCS works the same, apart from it being digital instead. It stands for Digitally Coded Squelch.
It sends a number repeatedly encoded in digital as you speak, in the low frequencies so you do not hear it.
If someone else transmits on the channel with a different or no DCS, the radio will not unmute.
If they transmit with the same DCS as you, then your radio will unmute. DCS is newer than CTCSS and has more combinations.
DCS has 104 built-in codes:
They may also be called "Privacy tones" or Privacy codes" but CTCSS and DCS don't stop anyone from listening to you,
they just stop you from hearing unexpected communication. If someone has a radio with no CTCSS and DCS on,
they will be able to hear everyone on the channel, including people using CTCSS and DCS.