Ctcss tone list. Compatible with all sub-audible CTCSS systems.

Jul 19, 2012 · CTCSS will keep the distant transmission from keying up the repeater (provided they are different CTCSS frequencies). ) (CTCSS is Continuous Tone Coded Squelch System. RX DCS - [MENU] 10 [MENU] [enter 0 (OFF)] [MENU] [EXIT] RX CTCSS - [MENU] 11 [MENU] [enter 0 (OFF)] [MENU] [EXIT] Name Meaning Setting Description Receiving CTCSS/DCS Refer to the DCS table and Page 9 4) You can adjust the parameters (VOX Function, Squelch, Side Key, Voice Prompt, Scan, etc. The tone is sent with the audio signal to open the squelch (unmute the audio) on a receiver tuned to the same tone. 6 Hz. PL/CTCSS CODES. The third, and probably most common, method is to use a CTCSS (Continuous Tone-Coded Squelch System) subaudible tone; if the tone is not present, the repeater will not retransmit the signal. Jul 3, 2019 · "CTCSS", displayed as "CT" on the main screen, selects tone encoder + tone squelch (your HT will send a tone, and only open the squelch on receive if the incoming signal contains the same tone). If you were to listen to this raw tone/voice combination on a good stereo, you would hear the voice along with a very annoying low hum. Uses 12 individual 5-bit DIP switches to select 12 tone frequencies and a rotary switch to select a particular preset tone. 9 xa 1 0 0 0 0 3 74. For what it's worth: Central Indiana has an amateur repeater that is utilized for state wide Skywarn. 3Hz 97. t. TONE SQL Activates the CTCSS tone squelch function on Analog FM receive. Using tones for TX and RX will work to eliminate false squelch breaks, and make it so you only hear those using the tones. Useful if you want to program a bunch of Baofengs To reduce confusion as to which tone is being referenced in terms of a paired frequency set (duplex with separate input and output frequencies, as repeaters typically use, the uplink tone refers to the tone that the user radio transmits with the uplink frequency and is required to activate (key) the repeater. The National Air Guard frequency is pre-programmed on the last channel of all NIRSC VHF radios. code 1 2 3 4 5 ===== 1 67. So if a repeater was programmed with, for example, DCS 053 to access the repeater, and a CTCSS tone of 151. In other words, as long as the transmission has a different CTCSS or no CTCSS, then your radio will not pass any audio to the speaker. Jun 5, 2018 · There are no sub-channels! That's what they call the privacy codes! And the "privacy codes" are just another name for the CTCSS tones. CTCSS (Continuous Tone Controlled Squelch System) a sub audible tone in the range of 67 to 254 Hz. NAC/Talkgroup Operation i. I understand that there are some common repeater frequencies and CTCSS coding across the country like (462. 2, “CTCSS Frequencies” in Appendix C, Technical specifications. (4) Beginning in 2014 FIRESCOPE added tones 17-32 to this list. 4 Hz) are CTCSS code numbers 31, 6, 15 and 24, respectively ( source ). DCS codes ending in N are positive. FRS CTCSS Tone Table This table shows CTCSS tones and associated tone or privacy code settings for a variety of FRS radio manufacturers Oct 20, 2020 · optional - Clear any CTCSS/DCS codes previously assigned to the channel. Unless you program the correct tone into the channel, transmission to that repeater will be fruitless. 5Hz due to the DCS/DPL kerchunk problem caused by the 134. Jan 18, 2019 · CTCSS tones are often used in other radios besides the FRS/GMRS radios. Each tone corresponds to a specific frequency. I just sold mine. 4 Hz to arm the timer. National Air Guard, 168. 4Hz without the need of tone measuring equipment. A CTCSS tone encoder generates low level CTCSS audio tone in the range of 67 – 254Hz which is transmitted with the voice signal (300 – 3000 Hz). " Many transceivers already do this. If you were to just listen to 155. All you need to do is assign a CTCSS tone or DCS code to the channel if needed and you're good to go. I understand the listed TX-CTCSS tone is required to “open the repeater. Disable CTCSS tone generation in the transmitter or at the CTCSS encoder. There is no tone to block an incoming signal on the frequency. * CTCSS/DCS Squelch filtering . Where more than one group of users is on the same radio frequency, CTCSS circuitry mutes those users who are using a different CTCSS tone or no CTCSS. Help us improve this article with your feedback. -rick Sep 23, 2021 · Midland Radio recently launched its new MXT115 and MXT275 MicroMobile Two-Way GMRS Radio. The MX465 CTCSS Encoder/Decoder is a low voltage, CMOS device that meets TIA/EIA-603 Standards. Figure 1—CTCSS offers an effective solution for repeater systems with overlapping coverage. 👉Support TheSmokinApe Channel on Patreon Here: h. There are more than 50 tone frequencies that work for CTCSS, but only 38 of them are commonly used on FRS or GMRS radios. You receive a CTCSS tone to only hear the transmitter (again, usually a repeater output) that you're interested in, and block out others on the same frequency. Guard Frequency. For a complete list of available CTCSS codes and corresponding sub-tone frequencies, see Table C. Each radio manufacturer decides what codes their radios will support and how those May 30, 2005 · The `original?' CTCSS tones only numbered 38 tones. Any standard CTCSS tone, or the lack of a tone, will be FPP operator programmable by channel and by frequency. 580 np4vg pr catano not in 2005 arrl directory 29. 7 . TE-16 Supplement (uses SS-64) 450 kB PDF file courtesy of Randy Johnson via Greg Beat W9GB Encode only. 21" high to fit inside most handhelds. You may be lucky and they just went with the default tone. 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. *Standard 38 CTCSS Tones + 83 DCS Codes Designation List Aug 16, 2022 · "The North Georgia GMRS Network is located in and around North Georgia from Chattanooga, Tn. Both CTCSS and DCS are all used on analog two way radios. TSQL does two things: it sends a CTCSS tone when you push PTT, and it sets a CTCSS tone squelch value on your radio. COM CTCSS (PL ®) Tones for various radios. Jan 20, 2014 · A repeater tone filters noise by adding a low-frequency audio tone to the voice. Click to expand Jan 2, 2022 · Re-enable the generation of CTCSS tones in the transmitter; Check that the peak deviation is no more than 3. Negative DCS codes end in I. So, only walkie-talkies set to that code will receive your signal. This one blocks the signal with a matching tone. This video offers step-by-step, button-by-button instructions to program a Baofeng UV-5R to use CTCSS tones or DCS codes using the keypad, not the CHIRP programming program. 0 cps, 110. Continuous Tone-Coded Squelch System; Tone Signaling CTCSS (Continuous Tone-Coded Squelch System) superimposes any one of about 50 continuous audio tones on the transmitted signal, ranging from 67 to 254 Hz. 6Hz, 199. 08" x . 3, 177. 3 Hz CTCSS) Downlink FM: Comments: PO-101 (Diwata-2) 437. If you want GMRS and FRS radios of differing brands to talk to each other, you’ll need this info. ) On some high-end radios, squelching can get really exotic. They use one CTCSS for normal operations and another for when Skywarn is active. 4 Hz tone, and all tones above that frequency are moved down one number - i. The CTCSS option has some advantages, in that it will ignore interference, or a far-away repeater on the same frequency that uses the same tone, and on CTCSS and 1750Hz tone-burst are also popular methods among amateur radio operators to open up repeaters. You transmit a CTCSS tone to get another receiver (usually a repeater input) to hear you. 85”W x 1. 5Hz, 189. – Programming Channels 54 Manual Programming 54 Apr 14, 2021 · The Wikipedia article on CTCSS says that the levels are set for 15% deviation, but I don't know how loud that is ;) I think it's far more likely that a typical receiver runs the audio through a high-pass filter after decoding the tones. 4 Hz as code # 2 or code # 39), 42 CTCSS tones (38 standard tones + 69. c. I only recently figured this stuff out myself. Used to monitor communications based on the squelch control system. Category Sep 12, 2021 · 1. The oldest list that I am aware of (from a November 1952 manual) is ten tones: 100. You will hear a call only when you receive a signal that contains a matching CTCSS tone or DCS code. CTCSS tones, since its analog, we have a phase reversal, often called "reverse burst" when it is only reversed at the end of the transmission. Recommend transmit CTCSS (T-CTCS) tone 67. This frequency, 168. Tone Backcountry Access Baofeng Cherokee 465 Cobra Tone Scanning 38 Scanning for CTCSS and DCS Tones/Codes 38 Chapter 7. 5 In this video I show how to scan for privacy codes or repeater tones (CTCSS tones or DCS tones) using a Baofeng UV-5R ham radio. That is, radios can be programmed to only break squelch when receiving the correct NAC. 35”L x 0. Jun 28, 2024 · Check local repeater listings for more specific frequency details and CTCSS tones required. 8Hz 206. ) Basic Setting Name Meaning Settings Description TOT[s] Transmission Off/30-300s This feature provides a limits transmission time-out timer time to a programmed value. Some government agencies have defi ned a conversion table for their own use for translating CTCSS to NAC codes What is CTCSS? CTCSS stands for Continuous Tone Coded Squelch System. To accommodate this, set your SQL. 8Hz 171. A Continuous Tone Code Squelch System (CTCSS) tone of 110. These tones are sub-audible (cannot be heard) and are selectable via software. 1 Hz. Those documents have since been removed and the selection of NAC codes has been left to the user. Consumer radios often have just an ID code number to identify each specific code. PL Tones Sorted By Code; Code: Frequency: Code: CTCSS takes advantage of the unused bandwidth below 300Hz by mixing one of the many tones listed below into the audio. TYP to TONE or ENC or TEN or rt for some radios; on many others, set the Transmit CTCSS to the tone frequency, and the Receive CTCSS to 0. 66" x 1. That way, you’ll never hear sporadic bursts of conversation from the distant machine Oct 26, 2021 · How do you remove, or turn off, the CTCSS tones after you've downloaded frequencies that have CTCSS tones from Sentinel to an SDS200 Favorites List? RadioReference Your Account Database Wiki Broadcastify Live Audio Help / Contact User CTCSS: Allows you to specify a CTCSS tone other than the standard list available. The tone required by each repeater is listed below in bold type following the repeater's nominal frequency. Is CTCSS the same as PL and DCS the same as DPL? Transmission on this frequency must include the Continuous Tone Code Squelch System (CTCSS) tone of 110. Upon decoding a valid CTCSS tone, the board gives a logic change. s. 25 kHz Recommended prepper/emergency management/disaster response calling/working channel - TX 88. My software has DCS and CTCSS but the databases list PL and DPL codes. TXP: HIGH - high power. Once you find the correct CTCSS tones for your area you adjust what was imported. CTCSS: Continuous Tone Controlled Squelch System Basically what it does is this: it adds a tone into your transmission at a certain frequency. Jun 5, 2018 · This is a companion post to Jay's "How to: Manually programming your UV-5R to use on FRS/GMRS". CTCSS tones will meet ANSI/TIA -603 (as revised) for all standard CTCSS code frequencies. ) A repeater will use a single established tone from a set of standard frequencies. The Codes listed are Midland. 4 cps, 167. If the radio receiver chooses to, it can keep the radio squelch circuit silent unless a particular tone is found. Appendix A ( CTCSS/DCS CODE ) 8. 0 Hz for FRS channel 1 (462. Both active high and low outputs are available simultaneously. 940 MHz 11. The question is which tones are the FRS radios using? The list of CTCSS tones has about 50 tones between 67. 6750 MHz). Mini 6 position Dip Switch to select desired tones. Jun 7, 2023 · transmit CTCSS tone edit, receive and transmit network access code and talkgroup edit. Sep 18, 2009 · This table should show anyone why it's totally useless to give someone a tone number. Jun 10, 2024 · Tone Range: CTCSS uses 38 standard tones, ranging from 67. 0, Tone 2 being 103. After using copy and paste, check the CTCSS tones for 67. Sep 9, 2021 · Sorry we couldn't be helpful. The reason for this is to make it easier for users to operate the local repeaters, as some older radios are only capable of a single tone as compared to modern radios which can The following PL (CTCSS) Tone Chart was found at this great site, KV5R. 5, 171. 8 Hz ("M6") and 37 = 250. The receiver is only unmuted when the correct CTCSS tone is detected. CTCSS typically decodes in about 250ms or less. CTCSS was developed into a system with numerous standard tones to choose from, often 38. Jun 14, 2024 · The Sql Tone listed in the table below can help reduce extra transmissions on the scanner. Oct 13, 2022 · Listed below is a chart of the standard CTCSS tones used for two way radios, along with common tone number assignments for radios that use them. Also known as a Continuous Tone-Coded Squelch System (CTCSS) tone or PL tone (Private Line). eia switch numbers* freq. Microminiature in size: . VOICE: OFF. CTCSS Decoder / Encoder Sub – audible tone decoder based on a a MX165CP from MX-com. Today, let us see the CTCSS/DCS scanning on Retevis RT85. This option allows you to ignore unwanted calls from others on the same frequency. This allows distant repeaters using a different CTCSS to co-exist on the same frequency. The tone is usually in the range of 67 to 254 Hz and is added to the audio signal before it is transmitted. 0Hz 94. Understanding CTCSS and DCS Get the best deals for CTCSS Tone Encoder at eBay. Sep 30, 2016 · Now, except for the local repeater frequencies all my GMRS channels in all my radios have the CTCSS option turned off. 6250 MHz is authorized for: • Emergency air-to-air initial communications • Emergency ground-to-air communications Oct 29, 2018 · Tone – For most repeaters, you will need to transmit a CTCSS tone to access the repeater. If a radio only has a capacity of 16 tones, the first 16 are programmed into the radio. CTCSS / DCS Description You may sometimes want to hear calls only from specific persons or groups. List of CTCSS Tones and DCS Codes . If it is more than this, adjust the CTCSS level so that a reading of 3. REPEATER CTCSS is part of a repeater's receiver that allows only signals with the proper "Tone" to access or open the receiver. The three digits can be any one of those values so there's not really a point in having a list of all possible NAC codes. It can serve the same purpose as a CTCSS tone or DCS code. (Sometimes this is also referred to as PL tones by hams, a Motorola trademark referring to “private line,” but it is not at all private. 8 ve2reh que gatineau old tone was 100. 5625 MHz) and 141. 9 Hz must be used when transmitting on the National Air . NAC and talkgroup codes will meet TIA TSB -102 APCO Project 25 specifications. 7 Hz: System Fusion (C4FM) in automatic mode. The signals that a repeater (or radio) will receive are signals with a specific sub-audible tone, called a CTCSS tone, that has been added to the signal. Channel Frequency Chart , CTCSS Code Chart , , Oct 30, 2022 · If the tone is not there, your signal doesn't get repeated. In order not to accidentally turn on the transmitter by the clutter signal, the repeater must set the receiving CTCSS tone. A MX-465DW CTCSS chip is used for CTCSS detection. System planning and engineering will be completed to ensure that existing and future co-channel radio systems are assigned different CTCSS tones. The CTCSS tone acts as an access method required to activate HAM radio repeaters. To connect the repeater, the intercom must be set to CTCSS tone. FEATURES: Size: 0. WN: NARR (narrow). CTCSS FRS No. 5 Hz CTCSS or 141. This chip is not duplex - meaning it will not generate (encode) and decode a tone Aug 27, 2016 · You're asking how to set up CTCSS, but what you really want is to have privacy. Sep 8, 2023 · Continuous Tone-Coded Squelch System or CTCSS is a function on a two-way radio that, as the name suggests, squelches, or quiets the radio until a tone code is received. 2 cps, 206. 5Hz 69. * BEEP TONE. Transceivers should be developed that would detect any CTCSS tone used by a repeater, and automatically apply the tone to the transmitted signal. Jun 17, 2024 · Set the CTCSS/DCS Tones (Optional) If the frequency requires CTCSS (Continuous Tone-Coded Squelch System) or DCS (Digital-Coded Squelch), navigate to menu items 13 (T-CTCS) for transmit tone or 14 (R-CTCS) for receive tone. Rev CTCSS - Mutes the radio when a matching tone is received. 6 and 199. 900 MHz Feb 1, 2006 · Mayberry Police uses a CTCSS tone of 123. g. For instance, you may Aug 2, 2023 · When discussing ctcss/pl tones and dcs/dpl codes that are split between the mobile/base stations and the mobile relay (repeater) stations can be confusing to most users when using terms such as encode and decode, transmit and receive, input and output. 850 MHz: 436. 8, 82. When choosing a DPL/DCS code to use, it is recommended to stick to using Motorola's original set of 83 DPL codes. 3Hz plus 97. CTCSS Code Number: Some radios (e. Tone – For most repeaters, you will need to transmit a CTCSS tone to access the repeater. Sep 2, 2019 · CTCSS (Continuous Tone Coded Squelch System) is an analog system used to reduce the disturbance of listening to other users on a shared two-way radio communication channel. 6 (CTCSS) tone of 110. Although they are listed in the official NIFOG documentation, they are not nationwide interoperable frequencies. Hz: CTCSS FRS ch: Hz: 1: 67. Later on there were another 12 tones added bringing the number up to 50. To keep the transmitter from over deviating, we usually set the tone deviation at around 600 to 800 Hz. 4 on the output, and you scanned the repeater while in use with tone capture, which code Aug 18, 2021 · FRS radios advertising "142 codes" have the standard 38 CTCSS tones plus the full set of 104 DCS codes. 9, 196. 0Hz and verify that this value is what you want. 5 Hz, 229. On most “consumer” PMR446 walkie-talkie radios, the 38 CTCSS tones are referred to as numbers from 01-38. They reject any incoming signal that doesn't have the tone. CTCSS stands for Continuous Tone Coded Squelch System, it is the generic abbreviation and is used to minimize co-channel interference. To select a CTCSS or DCS code: Select the required channel. I understand that a PL tone is used to create sub-banding in the same frequency to basically subdivide a single frequency into about 38 private "channels". 3Hz 203. May 5, 2016 · It's my understanding that many repeaters can be programed with a separate input and output tones. Feb 26, 2022 · The Network Access Code or NAC is a feature of Project 25 digital radios similar to CTCSS or DCS for analog radios. If turned on, radio will give short tone to indicate that there is nothing programmed for that channel. 5 Frequencies follow 1-22 111-127 CTCSS is 250. agency dispatch centers and aircraft. Like CTCSS, the DCS system adds a code to your transmission. 1Hz, and 254. At its core, tone squelch works by adding a low-frequency audio tone to the transmitted signal. Encoded tones are sent by the transmitter and decoded tones by the receiver to un-mute its speaker. Jun 20, 2004 · Does anyone know if there is a list of CTCSS tones that are used in a geographic area? EXAMPLE: If I wanted to find the CTCSS tones for a city in Florida how would I go about finding out this information? I am a member of a fire department that works in VHF High Band and I have a radio that works in this band. 580 173. Compare frequencies, codes and modes for different models. The TSU-8 is the optional CTCSS board. CTCSS tones can also be "reversed". This CTCSS tone is then detected by a CTCSS decoder in the matching receiver. To access DCS codes, scroll past CTCSS tone 50 until ‘DT’ is displayed. Direct Access - lets you directly access any channel. Some, but not all, repeaters will transmit a CTCSS Should this happen, the program defaults to 67. 11 The Technisonic TDFM-6148 radio does not meet the basic guidelines for single radio installations. 1 cps and 254. CTCSS Tone 67. 6kHz is attained. Mar 5, 2019 · yankees5478, your BC-72XLT cannot do ctcss/dcs and your Baofeng can but it is real hard to search at all, if possible the tones so you are out of luck. CTCSS stands for continuous, tone-coded squelch system, and is a technique used to allow repeaters—and radios—to receive particular signals and reject others. What the others have said is true, need to have the same code for encode and decode. Jan 10, 2024 · CTCSS - Receiving only - Only open the radio squelch if the incoming/receiving signal matches the configured CTSS Tone setting. Once a CTCSS squelch is open, wide band noise like intermod or computer hash can keep the squelch open after the transmitted carrier when its sub audible tone stops, resulting in unwanted noise at the receiver. The receiver on the other end is set to open its squelch only when it detects the specific CTCSS tone that is being transmitted. Pressing the PTT switch while a channel is in use will emit an alert tone and inhibit the transmitter. Sent from my LG-D631 using Tapatalk Midland Radio FRS, GMRS Channel Frequency Chart , CTCSS Code Chart . If a radio is programmed with a CTCSS code on RECEIVE, it will only hear transmissions that include the same subaudible CTCSS tone. DCS Activates the Digital Code Squelch (DCS) function. CTCSS 38ch Standard Frequency Table. 135 +600 KHz: 156. As technology improved, a new digital form of Carrier Squelching was developed, CDCSS, or Continuous Digital Coded Squelch System. Feb 14, 2024 · Recommended simplex repeater/crossband repeater channel (156. 500 MHz: 145. 2, etc. At any time when the transmitter is on, the tone is encoded on the signal. Frequencies used commonly are also listed in the "public safety" categories. Glad, because all the chatter distracted me. e. Most of the newer systems coming online with narrowband freqs are using mostly CDCSS, with only a few using CTCSS on the new freqs. 0 Hz to 254. You need to give them the tone frequency and let them be responsible for keeping a cheat sheet for their own radio with them. May be a pain; but you may have to go thru all the CTCSS tones, starting at the lowest. May 7, 2007 · Since many of these distant counties use the same frequencies as my local counties I've finally given in and started entering tone codes to be able to differentiate who is talking. 3 Hz. When programming professional radios, the CTCSS tones are usually referred to by the audio tone frequency in Hertz. ss/ts-32(p)dip switch programming for group a tones c. This is just the opposite of TSql which blocks the signal until a matching tone is heard. Now only our front end uses them. This will ensure you hear everything on the frequency. 1 Hz) or use 50 CTCSS tones + 83 DCS codes or some subset of these. Go purchase a Bearcat BC-125 AT and that is a great handheld scanner. 5Hz, 206. CTCSS protection is commonly used, worldwide, for control/protection of Most radios capable of CTCSS have at least 38 tones between 67. 3 tones), but are there also common CTCSS codes on the simplex frequencies as well? What is CTCSS DCS codes? Continuous Tone-Coded Squelch System or CTCSS is a function on a two-way radio that, as the name suggests, squelches, or quiets the radio until a tone code is received. This table shows CTCSS tones and associated tone or privacy code settings for a variety of FRS radio manufacturers. 570 MHz Dec 17, 2013 · CTCSS is Continuous Tone Code Sound Squelch. It requires that the repeater send a CTCSS / DCS Codes Definitions CTCSS codes are sub-audible tones that are measured by audio frequency in hertz. If no previous codes exist or when setting up the channel for the first time and no codes are needed, set the menu items listed below to OFF. 8 . If a call containing a different tone or code is received, squelch will not open and you will not hear the call. It's a three digit number. Aug 12, 2022 · g. 8Hz 131. So, for example, the SAFA1, SAFA2, SAFA3, and SAFA4 CTCSS frequencies (192. 0 Hz and 250. 9 must be placed on the transmitter AND receiver of the National Flight Following frequency. Dec 22, 2006 · CTCSS to NAC Conversion Early TIA documents specifi ed a formula for converting analog CTCSS tones and DCS codes to specifi c NAC codes. 795 MHz: Operational: SO-50 also has a 10 minute timer that must be armed before use. My question is one of terminology. 5, Tone 3 107. The 'Tone' on your TX must match the tone required by the RX on the other end. 5Hz, 229. - DTMF 42 Chapter 9. 9-Hz tone to use the KX4V repeater, or a 100-Hz tone to use the WA4ABC Learn how to use FRS and GMRS radios with this handy chart of channels and tones. local repeater is transmitting a CTCSS tone and your transceiver has a CTCSS tone squelch feature — most do these days — you can set the squelch to “open,” or let transmissions through, only when it receives the CTCSS tone from the local repeater. Jan 3, 2024 · R-DCS and T-DCS should both be set to OFF. 5 Hz, etc all the way to tone 35 = 233. DCS 252 is one of my favorite DCS codes which the Motorola Talkabouts don't have. Jun 28, 2019 · CTCSS (Continuous Audio Coded Squelch System) is the most commonly used. 9Hz, 196. Sep 26, 2021 · The most common reason that newcomers are unable to access a repeater is that they’re radio isn’t programmed to send a CTCSS tone. That's what my work did when we carried radios. Jan 26, 2022 · As we all known, many analog repeaters have their own frequency and CTCSS Tone, and the frequency maybe always the one many people already remembered, but not the CTCSS/DCS tone. 6 kHz. 9, 151. Apr 21, 2005 · It's not a tone. Page 81: Standard Ctcss And Dcs Tones The following is a list of the standard CTCSS and DCS tones supported by the KG-1000G. The FM deviation level of CTCSS tones should be in the range of 500 to 800 Hz. Many FRS or GMRS radios display a number instead of a specific tone. 8, again loud and clear, which this time is in the database as "Monte Vista ECC (San Diego)" and in my scanner as "CDF CMD 10". You can identify up to 50 CTCSS tones and 104 DCS codes. (TONE SQL) Activates the CTCSS tone squelch function on Analog FM receive. (CTCSS is Continuous Tone Coded Squelch System. Apr 14, 2021 · The Wikipedia article on CTCSS says that the levels are set for 15% deviation, but I don't know how loud that is ;) I think it's far more likely that a typical receiver runs the audio through a high-pass filter after decoding the tones. 3 PL MURS Channel 4 MURS-4 Blue Dot 154. Those are two different things. Mayberry Transit uses a CTCSS tone of 131. When a signal contains the designated tone, the squelch is not opened, and when the tone signal disappears, the squelch opens, and communication starts. The 22-channels assigned to the FRS and GMRS radio services are all shared, meaning that FRS operators can talk to GMRS operators, and vice versa, on all 22-channels. 0 to hear only their police traffic. ROGER: OFF. If a repeater only lists a single CTCSS tone does that mean: (a) The RX-CTCSS is assumed to be the same as the TX-CTCSS? Would this be the norm? (b) The repeater operator did not set a RX-CTCSS? Why would a repeater not have a RX-CTCSS? 3. 24”H without dip switch) • Field programmable • Crystal Controlled • Dip switch programmable to any one of 37 EIA CTCSS tones (67. To do so, select the same CTCSS tone as selected by the other persons in your group. 4Hz DCS reverse burst. com. A lot of people confuse PL tone transmission and CTCSS. In the business its even more evenly divided. 5, 189. CTCSS Tone: Mode: 147. ” 2. In other terms, the radio speaker will stay mute and ignore calls from parties that are on your channel unless they have the same tone code as you. Multiple tone switching can be easily handled by using diodes and a single pole CTCSS codes are functions that reject undesired signals on your channel. First of all, a tiny bit of theory about CTCSS. Anyway, the reader may notice, the RELM HS-200 has the `original?' tones as Sep 12, 2015 · I'm interested in listening to the local EMS/Fire transmissions around here and was wondering if I have to configure the CTCSS/PL tones on the radio in order to hear those transmissions. 28”H (0. They are pre-programmed into the repeater channels RPT-15-RPT22 for you already. 6250 MHz, is only used for: 10 CTCSS (PL) Tones Frequencies Metropolitan Coordination Association, Inc. - Customization 50 Display 50 Single or Dual PTT 51 Display Sync 52 Power On Message 53 Chapter 11. 1 Hz and 254. It's not 100% effective though as many repeaters either don't transmit a PL tone on their output, or they use a different output tone in order to prevent intermod Unlike DTMF tones, which are sent momentarily as the key is pushed, CTCSS tones are sent any time the transmitter is on. 0 hz 29. Both Midland and Motorola ID codes for CTCSS codes up to 38 are the same. Jul 24, 2023 · CTCSS/DCS Codes: Continuous Tone-Coded Squelch System (CTCSS) and Digital-Coded Squelch (DCS) are privacy features that allow you to set specific tones or codes to filter out unwanted transmissions from other users on the same channel. 3 Frequencies follow 1-17 This need to filter out the other users on a shared frequency gave birth to CTCSS, or Continuous Tone Coded Squelch System. The time required to reliably decode DCS is slightly longer than CTCSS and is about 350ms or less. 580 123. CTCSS (Continuous Tone-Coded Squelch System) superimposes any one of about 50 continuous audio tones on the transmitted signal, ranging from 67 to 254 Hz. 9 cps, 186. Press “MENU”, use the arrow keys to select the desired tone, and press “MENU” again to confirm. Related Wiki Articles. Transmit a 2 second carrier with a CTCSS tone of 74. Jul 28, 2023 · P25 repeaters use whats called a NAC (Network Access Code) in place of the PL tone/CTCSS access common to amateur repeaters. 3 n1rs pa apollo 29. Sep 9, 2020 · Step by step, button by button instructions to program a Baofeng UV-5R and most other handheld Baofeng walkie-talkies and HT GMRS or HAM radios to use DCS an Dec 15, 2015 · FRS Radio CTCSS Tone Number Comparison This table shows why you really don't want to give someone a tone number. CTCSS enables a limited selective calling (SELCAL) function as follows: A low-frequency (sub-audible) tone from a CTCSS encoder is injected into the modulator of a transmitter and decoded in a compatible receiver fitted with a CTCSS decoder. 390 +600 KHz: 156. DCS codes are bit streams added to a radio carrier. It is likely that it will take several years before all USFS Regions are in compliance. This is equivalent to setting TX TONE and RX TONE on some other radios. 64 tones from 33. Should this happen, the program defaults to 67. This video discusses what CTCSS/DCS tones and codes are and how to scan the output and input frequencies on a repeater to find out what tones are being used. 5Hz Programming Command List No. those made by Uniden) list their CTCSS frequencies by number, rather than by frequency. Adjusting the Transmit Audio Level. CTCSS frequencies and squelch codes may differ in some radios from third-party manufacturers. A Continuous Tone-Coded Squelch System . This “unsquelches” or “unmutes” the receiver and allows other users to hear that voice. Jun 15, 2023 · In this video, we take a look at the Yaesu FTM-500DR Dual Band Ham Radio and how to use CTCSS and DCS tones. Loc Description 1 Transmit CSQ - Receive CSQ 2 Transmit CTCSS - Receive CSQ 3 Transmit CSQ - Receive CTCSS 4 Transmit and receive the same CTCSS tone 5 Transmit and receive different Sep 8, 2023 · Continuous Tone-Coded Squelch System or CTCSS is a function on a two-way radio that, as the name suggests, squelches, or quiets the radio until a tone code is received. The number to the left of the tone matches what is used by most manufacturers. Feb 25, 2019 · CTCSS/DCS Technical Overview; For the current ETSI Standard TS 103 236 Continuous Tone Controlled Signalling System (CTCSS) and Digitally Coded Squelch Signalling (DCSS) document, go to the ETSI Standards search page and search for ETSI TS 103 236. 9 cps, 123. Hope this helps Nov 2, 2022 · It's because you don't need to figure it out. 5, 110. OK, I can't post the entire list, but here is what it is. Sep 11, 2012 · A tone-out of "beep beep beep" went out on 151. CTCSS CTCSS is set with menus 11 R-CTCS and 13 T-CTCS. Below is the terminology used by different commercial companies for CTCSS: PL is the Motorola Abbreviation for "Private Line". The Repeater System is “open” to all licensed GMRS users and is generally accessed by using a CTCSS tone. Settings values for the Tone Mode to use: This is the actual frequency value that the Tone Mode will use to access the repeater or block an incoming signal (or noise). +1 for mentioning tone scan! $\endgroup$ For starters there are only 50 odd tones (or less depending on the radio) and as more people use CTCSS, the chance of two groups of radios using the same tone increases. you desire--such as the Uniden 785(I'm sure others have this function) or perhaps looking in the RadioRef database for the agency involved For a full list of available CTCSS codes and corresponding sub-tone frequencies, see the CTCSS Table in the Technical Specifications section near the end of this manual. Each digit is hexadecimal digit so it can 0 through 9, or A through F. 0 or OFF. to Columbus, Ga. Many repeaters ‘perk up’ when they detect the tone, but many will not immediately cut you off if the tone becomes undetectable during a quick drop in signal strength. ) Repeaters with carrier access do not require a tone, so you can skip this step. 8 to hear only their bus traffic. Mar 24, 2021 · Repeaters have other complications as well. 7 Hz CTCSS tone) and SAFETY channel - TX 210. Digital Code Squelch is a further development of the continuous tone-coded squelch system. Using different tones works with repeaters because the repeater will strip the incoming town and add a different tone on transmit. Mar 18, 2007 · The most efficient way it to use a scanner that has the feature that will search for the correct CTCSS while stopped on the freq. - Selective Calling 44 CTCSS 46 DCS 47 Tone-Burst 49 Chapter 10. CTCSS works by adding a low frequency tone to the transmitted signal. 0 xz 0 0 0 0 0 2 71. If the received tone matches the programmed tone in the receiver, the squelch opens and the audio is heard. CTCSS uses a sub audible single tone like say 100 hz. Radios configured to use CTCSS filter out any signals that don't contain the designated low frequency tone. On some other radios, this is equivalent to setting TX TONE. 4 wa 0 1 0 standard radio and record your radio's channel and tone numbers in the chart below. When CTCSS is used, the audio is filtered out below about 300Hz, so that the only audio frequency energy that ends up being transmitted between 0 and 300Hz is the CTCSS tone itself (almost always any one tone between 67 and 254. 5 Apr 10, 2024 · Low CTCSS tones can’t usually be heard in the background, but the higher ones often can - depends on the filtering of individual radio designs. This prevents us from hearing transmissions without the matching tone. The Continuous Tone Coded Squelch System (CTCSS) allows you to ignore (not hear) unwanted calls from other persons who are using the same frequency. 580 162. 5 cps, 229. Other radios must have the same CTCSS tone or code set to hear the transmission. If you don’t know how to turn this feature off on your scanner, and don’t want to learn- get the no-tone version. It is a function that allows the radio to remain silent until the proper PL tone is received from a signal. 3 Hz, 206. This list provides a general overview of popular amateur radio frequencies in the UK for CHIRP programming. 3 Hz, with some having even more tones over a wider frequency range. 1Hz in addition to the 39 standard CTCSS tones, for a total of 47 CTCSS tones + Notone. 9 . 0 for the CTCSS frequency. - Dual Watch 41 Chapter 8. Page 30: Dcs There are 50 CTCSS tones and 104 DCS codes. 7 PL MURS Channel 3 MURS-3 151. It is divided into CTCSS and DCS. The process of tone-scannin Nov 14, 2021 · Digital-Coded Squelch (DCS), generically known as Continuous Digital-Coded Squelch System (CDCSS), was designed as the digital replacement for CTCSS. 0 Hz to 250. Dec 6, 2022 · The CT-30DW is a CTCSS decoder/encoder on a single printed circuit board. 190 with CTCSS 131. There is a digital version of CTCSS called Digital Coded Squelch (DCS). If CTCSS if off, this is sometimes referred to on some walkie-talkies as CTCSS code “00”. 1 Hz, crystal controlled for high accuracy and stability. Miniature 64 Tone CTCSS Encoder-Decoder with Dip Switch The Communications Specialists Model TS-64WDS Miniature 64 Tone CTCSS Encoder-Decoder is a microprocessor based product used for encoding and decoding subaudible tones. Below is a complete list of the standard CTCSS tones and DCS codes. Procedure: Setting up CTCSS Press the [MENU] button to enter the menu. 5Hz 173. This means that the tones will be present with the normal voice signal. tone 11 = 100 Hz, 12 = 103. 3, 183. However more importantly, many new scanners like the Uniden UBC780XLT, can actually report what CTCSS tone (if any) is being used on a transmission. Get the Diamond RH-77CA for MUCH better reception unless at a race track for class range. TONE Analog FM Transmissions contain the CTCSS tone. 147. In addition to its USB-C charging ports, the new MicroMobiles now offer split tone capability. 3 Hz ("M7"). 4Hz 136. Dec 15, 2023 · Please refer to the wiki article for notes regarding the use of CTCSS tones on Low Band, VHF, UHF, and 800 Public Safety Common frequencies. 0 cps, 136. 680 29. Channel 1 - 462. In order to more efficiently support high profile repeaters, the systems would be setup with their own CTCSS tone and only respond when it received a transmission encoded with its particular tone. The repeater will switch between analog and C4FM modes automatically to match the input signal Apr 7, 2023 · DCS is more reliable than CTCSS because it has more codes, which means fewer chances of interference. Custom Search - lets you program up to 10 Custom Search Ranges and search any or all of these ranges. DCode - The digital tone of the DCS column is transmitted only to the repeater. So now, if your radio can scan for a CTCSS/DCS tone, that will be very useful. 3 Hz or 69. Commercial radios often need to use CTCSS tones to work properly. Amateur radio transceivers can decode this tone, even if it is inaudible to the human ear. But, if the tone is wrong, can also prevent you from ever hearing your driver. Function: When a CTCSS tone is set on a radio, it will only open the squelch (allow audio to be heard) if it detects the matching tone. In this project The IC detects 39 tones in the  67 Hz – 250 Hz range You can find a filter this embebbded (0-300Hz) to have low tones off the speaker. Eventually the ham radios implemented CTCSS on the radio units as well to only open the audio when the radios received the tone from their local The design has one flaw: they forgot the 97. 4 Frequencies follow 1-22 89-110 CTCSS is 199. 5625 MHz - FRS 1 - FRS Nationwide Calling Oct 12, 2020 · In radio systems with a mix of CTCSS/PL and DCS/DPL usage, it is recommended to avoid using a CTCSS/PL tone of 136. Below find a listing of all the Private-Line (PL), or CTCSS codes, sorted by number and by tone frequency. Jay did a good job of explaining how to manually program Baofengs to work with the little Walmart radios, and this post is how to do it with Chirp. These GMRS tones allow the owner and/or manager to require a different tone to transmit and The SERA recommends regional CTCSS tone plans in the hopes that repeater owners/trustees in a given area will standardize on a particular CTCSS tone for that region. A CTCSS tone is This video explains the basic technical principles behind CTCSS (continuous tone coded squelch system) and DCS (digitally coded squelch) as well as how they * CTCSS / DCS CTCSS (Continuous Tone Coded Squelch System) or (Digital Coded Squelch). If there are several groups of users on one radio frequency, CTCSS mutes users who are using a different CTCSS tone or no CTCSS at all. Tones that do not exist in Kenwood radios include 159. The repeater will switch between analog and C4FM modes automatically to match the input signal. (Something to Google in your spare time. 5 cps, 151. CTCSS (Continuous Tone Coded Squelch System) or DCS (Digital Coded Squelch). While many FRS radios use the same number there are others that don't. 9 Hz. 8Hz, 183. 5 Jul 22, 2016 · Yes, you'll need to determine the Pl. 0: 20: 131. 010 in the clear, without any tones entered (aka CSQ, carrier squelch), you'd hear both the Police and Transit radio traffic. The process of tone-scannin the user to field select any one of 37 CTCSS tones plus 97. CTCSS Operation i. On P25 Systems, we use a NAC, or Network Access Code in place of CTCSS or CDCSS. In this video I show how to scan for privacy codes or repeater tones (CTCSS tones or DCS tones) using a Baofeng UV-5R ham radio. As long as they utilize separate CTCSS tones, many users can share a single frequency without interfering with each other. 7 Hz CTCSS 210. Jul 20, 2020 · 20 July 2020 WA7PTM Use of Sub-Audible Tones Both CTCSS and DCS were designed to ignore other users on a radio frequency Think of them as electronic ear plugs CTCSS is analog (a selection of tones, generally between 67 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. Category With DCS enabled the repeater will only open up if the signal contains specific DCS tone sequence, which most modern radios can be configured to output. 0 Hz and 254. It does this by adding a low-frequency audio tone to the voice. I know it's confusing. As it is with CTCSS tones, there is no universal standard for DCS tones or their number assignments in a radio. When more than one group of users is on the same radio frequency this technology mutes those users, who are Nov 1, 2022 · Other radios simply list the codes themselves and allow you to choose them directly. editor column settings for various CTCSS and DCS modes. This plan is an ideal mod for old FM tx , without Tone Sqelch. Similar CTCSS tone assignments are planned and activated to eliminate other CAL FIRE co-channel interference situations. 0Hz to 250. Mar 30, 2022 · That is because there is no standard CTCSS for GMRS or FRS, they are determined by the local repeater owner or in the case of FRS frequencies by the end user (since they are only . Oct 11, 2023 · CTCSS and DCS Squelch Modes - rapid search for CTCSS/DCS tones/codes used during a transmission. 10 A Technisonic AMS-6000 Audio Panel is highly recommended when using the TDFM-6000 series radio. 580 141. Programming these codes ensures you only hear communications from those using the same code. 1 Hz). For more detailed information and updates, refer to the RSGB (Radio Society of Great Britain) and other local amateur radio organizations. Sep 10, 2018 · Type Listed on Approved Radios list, P25 meets FS/AMD A-19 Power Output 10 watts nominal output, multiband transceivers 6 to 10 watts nominal output Antenna Cobham (Comant) CI 177-1 or equivalent CTCSS Tones All current TIA -603 standard tone encode & decode tone capability, TX tone level of 300 to 600 Hz in narrowband, frequency within 1. Jan 29, 2023 · 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. 3 Hz CTCSS 141. For the best results, you should compare CTCSS frequency information from your third-party radio with the information in this table. PO-101 (Diwata-2) Uplink FM (141. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Jan 12, 2024 · CTCSS is an analog approach that employs a tone between 67 and 250 Hz to control channel access. 1. At the time of compilation I had not discovered the exact reason for the addition. 4Hz) This squelch method is known as the Continuous Tone Coded Squelch System, or CTCSS. These tones are encoded with the voice audio at all times during the transmission. This frequency must be programmed into the last channel of . See transmit CTCSS tone recommendations on list below. It adds the tone to your transmission at certain frequencies. CTCSS/ DCS/ CROSS TONE CTCSS You may sometimes want to hear calls only from specific persons. This is the tone that is programmed Encode only. Aug 27, 2016 · You're asking how to set up CTCSS, but what you really want is to have privacy. The MX465 will encode and decode the tones 159. REV-T (REV TONE) Activates the reverse tone function. Jan 4, 2005 · Where I live its a nice mix of both CTCSS, and CDCSS tones in usage just for public safety. Nov 15, 2015 · Yes, I know where to find a list of standard and non-standard CTCSS tones, and even the letter/number names for them that Motorola and others use instead of just naming the tone frequency. BF-F8HP Jul 26, 2024 · The being the numbering with Tone 1 being 100. Compatible with all sub-audible CTCSS systems. ctcss tone callsign st/ prov tx city comments 29. 3 Hz for FRS channel 20 (462. Many require the radio to send a special tone, called a CTCSS tone or a DCS tone, before the repeater will repeat transmission from that radio. 675 MHz,141. Useful if you have a friend and you guys have combined an specific tone for your conversation - So when the received signal has the specified the tone, your radio opens squelch and outputs the other party signal. 5 watt simplex) and subject to change. 8, 165. (67 Hz CTCSS) Downlink FM: Comments: SO-50 (SaudiSat-1C) 145. The name means Continuous Tone-Coded Squelch System. 0 w3hzu pa york 29. every group in fire handheld radios. In this example, the ham who lives in the overlapping zone can send a 71. h. When CTCSS tones are being selected, ‘CT’ is displayed. Every 22 channels repeats the frequencies of 1-22 23-44 CTCSS is 100 Frequencies follow 1-22 45-66 CTCSS is 123 Frequencies follow 1-22 67-88 CTCSS is 151. 580 ve2rst que saint-joseph-du-lac The full list of the tones can be found in their original standard RS-220A, and the most recent EIA/TIA-603-E; the CTCSS tones also may be listed in manufacturers instruction, maintenance or operational manuals. 8: 2: Feb 14, 2024 · Some use 39 CTCSS tones (add 69. Uses a 16-position rotary switch to select one tone frequency pre-programmed by the factory. Two Miniature Crystal-locked CTCSS Tone Encoders Do you have an elderly FM transceiver that needs CTCSS? Here is a very low cost versatile, accurate and super-stable CTCSS tone encoder module which should be ideal for your requirements. What are split tones? Split tones are a function used on repeaters. These radios have two additional tones: 36 = 241. +1 for mentioning tone scan! $\endgroup$ Oct 6, 2012 · CTCSS takes advantage of the lower unused bandwidth by mixing one of the many tones into the audio. 1 cps, identical to tones 1Z through 0Z in the Motorola standard tone list (and just for information, the confusing tone descriptor "0Z" ("zero-Z") came to be Aug 23, 2021 · Deactivates the tone squelch function and DCS function OFF, then returns to the normal squelch operation in the Analog FM mode. This a 12-bit prefix that is attached to every packet (including the digitized voice packets). Receives as a normal squelch operation. In the same way that a single CTCSS tone would be used on an entire group of radios, the same DCS code is used in a group of radios. The list below the screen shot contains descriptions of the modes and corresponding CHIRP location number. The DCS codes and the CTCSS tones are accessed through the same menu (refer the following table). and areas in North Carolina. ii. It's not a privacy system, it's a squelch system! It works by sending a tone-code continuously while you're transmitting. 2 ka7osm or portland not in 2005 arrl directory 29. Each radio contains a filter to filter out anything below 300Hz so the tone is not heard even though it is there. Nov 28, 2007 · Here are the CTCSS and DCS tables from the Icom IC-91AD handheld radio manual: Here are the CTCSS and DCS tables from the Kenwood TH-f6A handheld radio manual: Here are the CTCSS and DCS tables from the Yaesu VX-8R handheld radio manual: Midian Electronics has a handy PDF file that contains details of just about every tone signaling scheme used. May 25, 2021 · When using two-way radios or walkie-talkies, we all use CTCSS/DCS or Motorola system PL tones or DPL. vn bp mk cq ew jp ol fm qv wk