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General Electric responded with the same system under the name of Digital Channel Guard (DCG). Newer Yaesu 50-tone CTCSS list A different 38 tone list (missing 7 standard tones, adds 3 unique tones) 41 tones 47 tones Many ICOM radios Moto 1965 list of 26 tones EIA Grp A EIA Grp B EIA Grp C Moto standard code list (42 tones) EIA/TIA RS-220 standard (37 tones) Comment; 67.0: 1: 1: 1: 1: 1: 1: 1: 1: 1: 1 : A : XZ or L1: 1: Listed as 67.1 in The Continuous Tone Coded Squelch System, commonly referred to as CTCSS, has been in used in the land mobile radio arena from the late 1960’s. It is known by a number of different trade names such as Private Line ® (PL) by Motorola, Channel Guard ® (CG) by General Electric and generically as tone squelch. Two-way Radio CTCSS and DCS Codes All digit zeros are shown in the tables with a slash through them, to eliminate the chance of confusing them with the capital letter O. CTCSS (Continuous Tone-Coded Squelch System) uses sub-audible (below 300 Hz, not necessarily inaudible) tones to activate coded receivers. 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.

Ctcss codes

Eng. Continious Tone Code Squelch System. Andra namn är Pilotton, Att lyssna på trafik som använder CTCSS går utmärkt, att man sänder en CTCSS/DCS (Continuous Tone Code Squelch System/Digital. Code Squelch): Dessa system använder en speciell typ av signa- lering (en kontinuerlig subton Pilottonsystemet CTCSS (Continuous Tone Code. Squelch System) är en s.k underbandston som fungerar som ett filter. Om du och de du vill tala med har ställt 11 _ R-CODE - CTCSS/DCS för mottagning. för kanalen med Frekvens, Wide/Narrow, Namn, se till att CTCSS, DCS, Offset, SFID är OFF. retevis h-777 walkie talkie uhf 400-470mhz 16ch ctcss/dcs 2 way radio(10 pack) och programmeringskabel | Purchase high quality products online with Ubuy -Encryption Code. - Digital Contact List Color Code 5.

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Federal VHF national interoperability channels used in 1 Oct 2016 121 Privacy Codes. (38 CTCSS codes/83 DCS codes).

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9. Keypad lock/unlock CTCSS Contious Tone Code Squelch, subtone, subaudible tone, det finns många namn. Subtoner finns från 63 Hz till c:a 250 Hz, 50 st att välja Tryck för att bekräfta kanalvalet och gå till CTCSS SUB-KANALVAL. • Tryck eller för att byta CTCSS. • Tryck för Channel Frequency Chart: CTCSS Code Chart.

Also known by various trade names such as Private Line (PL), Channel Guard and Quiet Channel.
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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. 2018-03-29 CTCSS takes advantage of the unused bandwidth below 300Hz by mixing one of the many tones listed below into the audio. If the radio receiver chooses to, it can keep the radio squelch circuit silent unless a particular tone is found. 2018-09-17 2012-10-06 2007-11-17 • CTCSS - Continuous Tone Controlled Squelch System.

This is nonsense. 2013-02-21 53 You can also select a DCS code by using the microphone: 1 Select your desired band. 2 Press [TONE] 3 times to activate the DCS function. • The icon appears on the display when the DCS function is ON. • Each press of [TONE] changes the selection as follows: Tone (T) –> CTCSS … CTCSS frequencies and squelch codes may differ in some radios from third-party manufacturers. For the best results, you should compare CTCSS frequency information from your third-party radio with the information in this table.. CTCSS (Continuous Tone-Coded Squelch System) continuously superimposes any one of about 50 low-pitch audio tones on the transmitted signal, ranging from 67 to 254 Hz. The original tone set was 10, then 32 tones, and has been expanded even further over the years. CTCSS codes are functions that reject undesired signals on your channel.
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By Ken Collier, KO6UX If you’re an FM operator, you’ll encounter CTCSS—Continuous Tone-Coded Squelch System—early in your ham career. 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 overlap with yours. Specifically, DCS gives you 83 codes, whereas CTCSS gives you somewhere between 26-50 squelch tones depending on the radio -- manufacturers have added extra codes over time. Le codage CTCSS est tout simplement un système ingénieux qui autorise ou non l'ouverture du squelch (silencieux) chez les interlocuteurs qui ont choisi un code identique.

A later Digital-Coded Squelch (DCS) system was developed by Motorola under the trademarked name Digital Private Line (DPL). General Electric responded with the same system under the name of Digital Channel Guard (DCG). The generic name is CDCSS (Continuous Digital-Coded Squelch System). And, a list of CTCSS tones (Quiet Codes): These frequencies and tones are common to all FRS and GMRS radios in existence.
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One of the downsides of privacy codes is that you could assume that since you do not hear any communication on your radio, the channel is not being used. When I went to work for the police department at San Diego State University in 1972, there were 19 different campuses in the California State University System. Each of the 19 police departments used the same radio frequency, but each had a different PL (CTCSS) code.

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The idea is very simple…the FM transmitter includes a continuous tone on the transmitted audio. When the receiver (repeater) hears the required tone, the squelch opens. Btw, "privacy codes" on FRS radios are just CTCSS codes.

• Split tones - Transmitting and receiving different CTCSS tones or DCS codes. In CHIRP this is called Cross Mode. 2019-11-11 · CTCSS, also known as Private Line and Channel Guard, is a low continuous tone transmitted on NFM voice transmissions that is used to squelch and manage transmissions on a given frequency. How radio "privacy tones" or CTCSS tones work. - YouTube.