Earlier this week, we began a discussion of CTCSS, an acronym for Continuous Tone Coded Squelch System. Today we will examine the practical application of CTCSS. Before the concept of trunked radio user groups and push-to-talk (PTT) over cellular, many users purchased portable radios and shared airtime over a given RF channel, which usually was owned and licensed by a local radio shop.

Med både CTCSS och DCS bör det noteras att endast den https://www.youtube.com/watch?v=qnP7erTvaD0 Youtube-video av ett

CTCSS, DCS, "PL tones", privacy codes What does it all mean for you and your radio? CTCSS (Continuous Tone Coded Squelch Systems) aka "Tone Access" or "PL" CTCSS 1.01 - the very basics (Jim, KC9HI) Many repeaters have a LOCK on their receiver to keep unwanted interference from getting in (Lock = receive CTCSS tone). If it does, your radio needs to transmit the matching KEY to enter. (Key = transmit CTCSS tone). Effects of CTCSS/DCS privacy codes?

Digital Coded Squelch (DCS) is somewhat similar, but instead of sending a continuous tone of differing frequency, a Digital data transmission is added to the radio signal. This Digital Code is transmitted at a really low rate, around 134 bits per second (the code is 23 bits long). DCS (Digital Coded Squelch) is digital data or code word that is transmitted with the voice audio. This data is sub-audible with most of it's energy below 300Hz. However is does have a wide bandwidth from 2 to 300 Hz. Unlike CTCSS (Continuous Tone Coded Squelch System) which uses continuous tones below 300 Hz., DCS uses digital data or code words. CTCSS = Continuous Tone-Coded Squelch System CTCSS brand names: Private-Line (PL), Channel Guard (CG), Quiet Tone (QT) DPL = Motorola Digital Private Line (DPL). Motorola trademarked the DPL name, so other radio manufacturers have to call it something different.

What are CTCSS and DCS If you are programming repeaters into your radio or working certain satellites, you likely encountered the above. This is not a full background or technical paper on either CTCSS or CDS but it has enough to get you to understand them and get going.

Incidentally, there is/was a digital variation of CTCSS developed much later called Digital Controlled Squelch (DCS). Relatively rare, the 83 or 104 ‘tones’ or ‘codes’ that system used were digitally generated using 23-bit group addresses or ‘codewords’ using FSK FM carrier modulation. DCS DCS (Digital Coded Squelch) is digital data or code word that is transmitted with the voice audio.

CTCSS (Continuous Tone-Coded Squelch System) uses sub-audible (below 300 Hz, not necessarily inaudible) tones to activate coded receivers. PL (Private Line) is Motorola's trademarked name for this system. General Electric calls theirs CG (Channel Guard). DCS (Digital-Coded Squelch) uses a 23-bit digital pattern to activate coded receivers.

CTCSS => Radion måste vara inställd på. CTCSS för att Svenska standard. 30 CTCSS/DCS frekvens Scan överföra uteffekt, CTCSS, DCS, kanal bandbredd, frekvens steg, Frekvens Skift BATT-V: visar den aktuella batterispänningen.

Tones and codes in the old areas that have been realigned are Jun 28, 2019 When there are multiple walkie talkies communicating on the same frequency, Using a CTCSS or DCS tone can prevent interference from the Digital Code Squelch (DCS) is another application which allows you to ignore ( not hear) unwanted calls. It functions the same way as CTCSS. The only Jul 18, 2016 DCS (aka DSQ/DPL) provides a slightly larger range of codes to pick from compared to CTCSS. This means less chance that a nearby station will accidentally Jun 2, 2010 The cheaper License free radios have only CTCSS and the more expensive license free radios also have the DCS tones. I would like to rather ScanScope detect three methods (DCS, CTCSS, Selcal) by which radio CTCSS (Continuous Tone-Coded Squelch System) uses a set of separate DCS is also known as Motorola Digital Private Line – “DPL “. DCS is a digital form of CTCSS. Instead of sending a continuous audio tone however, it transmits a Jun 8, 2019 TSQL is Chirp's way of specifying a CTCSS tone mode in BOTH transmit you can actually split CTCSS and DCS tones (digital tones) but that Sep 13, 2017 known formally as continuous tone-coded squelch system, or CTCSS CTCSS systems were joined by digital coded squelch (DCS) systems FEATURES.
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This data is sub-audible with most of it's energy below 300Hz. However is does have a wide bandwidth from 2 to 300 Hz. Unlike CTCSS (Continuous Tone Coded Squelch System) which uses continuous tones below 300 Hz., DCS uses digital data or code words. The FM deviation level of DCS data should be in the range of 500 to 800 Hz.Unlike CTCSS, DCS signal spectrum occupies considerable more bandwidth. Let’s talk about CTCSS and DCS today .

오늘은 이 두 단어의 의미를 소개하고자 합니다. 한 줄 설명을 하자면 ctcss/dcs는 같은 채널(주파수)을 사용하는 다른 그룹과의 혼신을 막도록하는 가청주파수 이하의 톤 코드(또는 서브채널) 입니다.
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另外dcs的原理也和ctcss相同，只是採用的是數位訊號編碼，一般標準規格是劃分104組訊號。技術應用：透過CTCSS與DCS技術，先將所有需要通話的人設定同一內碼，可以達到通話過濾不被其他使用同頻率的人干擾、二來還可以過濾外來的干擾電波所造成的噪音。

It functions the same way as CTCSS. The only Jul 18, 2016 DCS (aka DSQ/DPL) provides a slightly larger range of codes to pick from compared to CTCSS. This means less chance that a nearby station will accidentally Jun 2, 2010 The cheaper License free radios have only CTCSS and the more expensive license free radios also have the DCS tones. I would like to rather ScanScope detect three methods (DCS, CTCSS, Selcal) by which radio CTCSS (Continuous Tone-Coded Squelch System) uses a set of separate DCS is also known as Motorola Digital Private Line – “DPL “. DCS is a digital form of CTCSS. Instead of sending a continuous audio tone however, it transmits a Jun 8, 2019 TSQL is Chirp's way of specifying a CTCSS tone mode in BOTH transmit you can actually split CTCSS and DCS tones (digital tones) but that Sep 13, 2017 known formally as continuous tone-coded squelch system, or CTCSS CTCSS systems were joined by digital coded squelch (DCS) systems FEATURES.

CTCSS, DCS, "PL tones", privacy codes What does it all mean for you and your radio?

A “Split Tone” mode also allows operation on systems where CTCSS and DCS CTCSS uses a sub-audible tone transmitted on the signal of the transmitter trying to access the repeater. The amateur radio repeater has a very sharp filter to detect whether the exact tone is present. It will also remove it before transmitting the required audio.

Click the links below to join our Offical Facebook Group and subscribe to our YouTube Apr 17, 2020 Digital-Coded Squelch (DCS); XTCSS.