Uses sound card to generate ctcss, dtmf, 2tone paging, toneremote, and 56tone ani. The repeater tone is the tone you transmit to access a repeater which has tone access. So, you mean something that will give you the sequence of calling tone digits like used in zvei1 to zvei5. See also matthew kaufmans mdc code from which winmdcd is based. Comtekk 2tone decoder utilizes the latest in digital signal processing dsp technology to instantly and accurately measure the frequencies of a received twotone paging signal or fire dispatch tone out signal receiver audio output is fed into the computers sound card via cable or microphone where an ad converter reads the signals instantaneous voltage 11,025 times per. It can decode, transpond and encode from a keypad and ani in any combination of dtmf, twotone, fivetone and 1500 and 2805 hz pulse tone. Ctcss dtmf tone decoder and encoder resource detail.
The circuit consists of i and q detectors driven by a voltage controlled oscillator which determines the center frequency of the decoder. If i then turn off pl decode, the pl frequency i had just saved will revert back to 88. Probando pluing decoder subtonos en software radio sdr en vhf, 145. Comtekk multi decoder will listen for any sustained tone signal and display the frequency or frequencies. This is what allows your kit to stay small enough to fit in some radios, yet useful enough for any decoder need. Jun 24, 2015 probando pluing decoder subtonos en software radio sdr en vhf, 145. Both actrive high and low outputs are available simultaneously.
The transistor used in the old circuit would cause the tone frequency to change at high levels. The software lies within communication tools, more precisely instant messaging. There are a few software titles that will decode a pl tone but i have yet to find one that will. No 56tone or tone remote multidecoder 2tone, dtmf, ctcss. This device is designed to provide a transistor switch to ground output when the input signal frequency matches the center frequency pass band. The main category is dtmf projects that is about dtmf projects. Multi tone decoder software download scanner master. This old, unmaintained software comes with no warranty of any kind. It uses the computers sound card to listen to the received audio and detect twotone sequential paging sequences quickcall 2 and similar formats. In amateur radio, the terms pl tone, pl and simply tone are still used somewhat commonly.
The dtmf decoder is also used for receiving data transmissions over the air in amateur radio frequency bands. See the dpl dcs page for information on a digital coded squelch system unlike the analog plctcss squech systems, the 23 bit dcsdpl squelch system. The name pl is a motorola trade mark and continuous tone coded squelch system ctcss is a generic name. Jun 17, 2014 ctcss dcs tone decoder and frequency counter radiohamguy. Looking for a dpl pl visual type decoder for the bench. This helps us from hearing other systems on the same frequency from other florida distracts when conditions are rolling. Ctcss is an acronym for continuous tonecoded squelch system and is a system that is used in shared two way radio systems. The new st804a is a highly versatile encoder module compatible with three popular land mobile radio signalling formats.
The plugin can detect ctcss tones and provide a squelch for the desired tone. Ctcss uses a special tone to identify each group of users, and this tone is used to prevent a group hearing radio chatter from another group sharing the channel. Two of them forming a uhf repeater and, at least, two other, forming a second repeater or simplex radios for linking the first repeater with other remote repeaters. The board uses a genuine micor m6709 m7716, as i have yet to find anything superior. It has a much more stable tone frequency as well as the elimination of the loading problem on the output. Often, there is a distinction between the terms tone and tone squelch, in which the former refers to the use of transmitting a ctcss tone while using standard carrier squelch on the receiver. Tx tone encode rx carrier squelch and with the pl tones configured in both tx and rx. The receive tone is referred to as the decode tone. The squelch tone is used by you on receive to allow only those signals tranmitting that tone to break your squelch. Jan 19, 2017 if the repeater is configured to transmit the same or different tone your setting may be labeled tone squelch, tsquelch, or encodedecode.
See the dpl dcs page for information on a digital coded squelch system unlike the analog pl ctcss squech systems, the 23 bit dcsdpl squelch system. Fire tone decoder ii instantly discover fire dispatch pager tone frequencies with our easytouse tone decoder. Dtmf anieni, twotone sequential, and burst single tone. Figure 1 is an inexpensive pl tone generator with significantly improved performance. Jul 22, 2010 please help i have a situation where there are a handful of ctcss tones being used on a frequency. However, i tried it out with a couple of sample files i found on the internet and it didnt produce any output. Tone detector works in parallel with audio streaming software and is also usable for getting signals for devices like telephones and televisions. Use of transmitonly ctcss allows stations to communicate with. If your local repeater has got you singing the pl tone blues, then read on. Optoelectronics dc440 or dc442 ctcssdpl tone decoder. Feed scanner or receiver audio directly into computer sound card, or simply place computer microphone close to receivers speaker. Ctcss encoder decoder board by masters communications. The program provides the user a audio spectrum analyzer that is powerful and. Anysecu sf103 asf103 portable frequency counter 2mhz 2.
Ctcss continuous tone coded squelch systems aka tone. Comtekk multidecoder utilizes the latest in digital signal processing dsp technology to instantly and accurately measure the frequencies of a received twotone paging signal or fire dispatch tone out signal, ctcss pl tones, and dtmf codes receiver audio output is fed into the computers sound card via cable or microphone where an ad converter reads the signals. 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 it is a use of subaudible tones that are transmitted along with the speech portion of. Ctcss subaudible tone decoder reveals repeater access tones. 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. Ctcss decoder with arduino from a friend of mine i got an ideea for a complex repeater controller, able to work with 4 radios. Scanscope allows you to monitor radio traffic and to decode and to record the various. Upon decoding a valid pl tone, the board gives a logic change. These programs will display the a detected ctcss tone when connected to the. For this reason, do not initially program your radios receiver to require a tone. Rtlsdr rtl2832u and software defined radio news and projects. No 5 6tone or tone remote multidecoder 2tone, dtmf, ctcss.
A ctcss decoder is based on a very narrow bandpass filter which passes the desired ctcss tone. You may discover it while youre puzzling over the fact that a particular repeater seems deaf to your signals. This chip is not duplex meaning it will not generate encode and decode a tone simultaneously. It appears to be very close in frequency within 200hz at 146 mhz and 447 mhz. About ctcss dtmf tone decoder and encoder the resource is currently listed in in a single category. An improved pl tone encoder improved pl tone encoder by n1hfx a significant amount of interest has been generated since my last article on a pl tone board. It can also decode, ani and transpond in dtmf, twotone, fivetone and 1500 and 2805 hz pulse tone. One small fault, though the cts tone frequency on 447 mhz is incorrect.
Comtekk multi decoder makes use of the computer sound card and software dsp digital signal processing techniques to decode and instantly display paging, dtmf, and ctcss toneencoded information. This link is listed in our web site directory since monday dec 21 2009, and till today ctcss dtmf tone decoder and encoder has been followed for a total of 1653 times. Comtekk multi decoder will listen for any sustained. Ctcss dcs tone decoder and frequency counter radiohamguy. Ctcss stands for continuous tone coded squelch system, it is the generic abbreviation and is used to minimize cochannel interference. Comtekk 2 tone decoder utilizes the latest in digital signal processing dsp technology to instantly and accurately measure the frequencies of a received two tone paging signal or fire dispatch tone out signal receiver audio output is fed into the computers sound card via cable or microphone where an ad converter reads the signals instantaneous voltage 11,025 times per. From my understanding, you have to write down or remember the pl tone on the 396t and reprogram the channel. Instantly discover fire dispatch pager tone frequencies with our easytouse tone decoder. It does this by adding a low frequency audio tone to the voice. The program processes the audio signal from the receiver connected to the. Listed under the softwaredecoders category that is about radio signal decoders. A tone detector, tone decoder or tone generator is software that lets you interpret various audio frequencies and their wavelengths on telephones and various other types of digital audio devices.
Ctcss dtmf tone decoder and encoder resource detail the. Software to decode selective calling tones amateur radio. The brains of your decoder is the 145436 touch tone decoder chip. Use sound card to generate ctcss, dtmf, tone remote, ani and more.
Ctcss continuous tonecoded squelch system uses a set of separate. I need someway to decode which ones are being used and keep a log of them with a time stamp. Wtb a yaesu fts7 ctcss pl tone board for a yaesu ft203r. Below is the terminology used by different commercial companies for ctcss. Ctcss pl tones frequencies metropolitan coordination association, inc. Ctcss is an acronym for continuous tone coded squelch system and is a system that is used in shared two way radio systems. Two tone paging decode old diy outdoor access pointclient bridge. Very handy little device if you do much with two way radio or want to find out the tone and frequency a radio is transmitting without. Ctcss dcs tone decoder and frequency counter youtube. By ken collier, ko6ux if youre an fm operator, youll encounter ctcsscontinuous tonecoded squelch systemearly in your ham career. In this project the ic detects 39a tones in thea a 67 hz 250 hz range you can find aa filter this embebbdeda 0300hz to havea low tones off the speaker.
In telecommunications, continuous tonecoded squelch system or ctcss is one type of circuit that is used to reduce the annoyance of listening to other users on a shared twoway radio communications channel. Hey just wanted to let you know your two tone reader decoder software is awsome. The continuous tone coded squelch system, commonly referred to as ctcss, has been in used in the land mobile radio arena from the late 1960s. Comtekk 2tone decoder utilizes the latest in digital signal processing dsp technology to instantly and accurately measure the frequencies of a received twotone paging signal or fire dispatch tone out signal receiver audio output is fed into the computers sound card via cable or microphone where an ad converter reads the signals instantaneous. This state of the art technology ic chip can detect and decode all sixteen codes. Comtekk multi decoder makes use of the computer sound card and software dsp digital signal processing techniques to decode and instantly display paging, dtmf, and ctcss tone encoded information. It can decode, transpond and encode from a keypad and ani in any combination of dtmf, two tone, five tone and 1500 and 2805 hz pulse tone. In the received audio path the radios audio is routed to the tone decoder input of the chip. These programs will display the a detected ctcss tone when connected to. It is common for a single radio channel to be shared over a number of user groups for frequency use efficiency. Decoding the secrets of ctcss while most rigs can send these lowfrequency audio tones, decoding them is a handy trick, too. The name pl is a motorola trade mark and continuous tonecoded squelch system ctcss is a generic name. Dtmf decoder is a very easy to use program to decode dtmf dial tones found on telephone lines with touch tone phones. Comtekk multi decoder utilizes the latest in digital signal processing dsp technology to instantly and accurately measure the frequencies of a received two tone paging signal or fire dispatch tone out signal, ctcss pl tones, and dtmf codes receiver audio output is fed into the computers sound card via cable or microphone where an ad converter reads the signals.
This plan is an ideal mod for old fm tx, without tone sqelch. That is, radios can be programmed to only break squelch when receiving the correct nac. Ctcss dtmf tone decoder encoder iw5edi simone hamradio. Because of this interest i decided to improve on the old pl tone design. The ct30 is a ctcss decoderencoder on a single printed circuit board. Nice thing about the pro 96 vs the 396t is when it stops on a channel, it will display the pl tone, and you can hit enter and it will save the pl tone right away. The winradio digital suite is an optional software package, a collection of digital signal processing. Comtekk software tone generator code synthesizer for 2way radio signaling. St804a multiformat encoder dtmf anieni two tone sequential burst tone.
Comtekk multi decoder utilizes the latest in digital signal processing dsp technology to instantly and accurately measure the frequencies of a received two tone paging signal or fire dispatch tone out signal, ctcss pl tones, and dtmf codes. The sc50 is a micor noise squelch, and a cml ctcss decoder on a single printed circuit board. I use my pro96 when searching for pl tones on frequencies i already know. Nacs are programmed as a 3 digit hexadecimal code that is broadcast along with the digital signal being transmitted. Where more than one group of users is on the same radio frequency. Need external pl ctcss tone generator for old 2mfm rig. The difference between pl and ctcss is in how the optional reverse burst is implemented. Comtekk multi tone decoder software discover ctcss, dtmf and fire toneout frequencies using your sound card.
If i setup the rx pl tone frequency, the program will automatically turn on pl decode, which is not what i want. Twotonedetect is a computer program that interfaces with a radio receiver or scanner. So the repeater tone is used when you transmit and the squelch tone is used when you receive. If the repeater is configured to transmit the same or different tone your setting may be labeled tone squelch, tsquelch, or encodedecode. Dtmf decoder shareware a very easy to use program to decode dtmf dial tones found on telephone lines with touch tone phones.
In this video mike shows how to decode ctcssdcs tones using kgtone. Nacs are programmed as a 3 digit hexadecimal code that is. Scanscope decodes dcs ctcss and selcal signalling received on. Aiglon dtmf coder decoder is a small, simple and easytouse program that represents a windows touch tone keyboard used to generate a dtmf sound into your sound card. Chirp daily20160926 i prefer to setup channels with. Please help i have a situation where there are a handful of ctcss tones being used on a frequency. I got an example from the sigid wiki specifically zvei15, converted it to mono wav its stereo for some unclear reasons, and built this flow graph in gnu radio companion from scratch what is missing is a lookup table at the end that converts. This type of paging is commonly used for fire department alerting.
The network access code or nac is a feature of project 25 digital radios similar to ctcss or dcs for analog radios. Depending on the subaudible tone frequency selected using the programming inputs, as well as if that particular tone frequency is present in the audio input, the rx decode output pin 15 will go to a logic level one for a valid tone decode. To align the frequency of the tone generator, use another transceiver with. Comtekk multi tone decoder software discover ctcss, dtmf and fire tone out frequencies using your sound card. Continuous tonecoded squelch system the radioreference wiki. Ctcss decoder encoder sub audible tone decoder based on aa a mx165cp from mxcom. The heart of the pl tone generator is the ultra stable 567 ic which is readily available from jdr microdevices or ocean state electronics.
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