Jun 17, 2014 i found these devices brand new on ebay. After checking out the website i dont see any mention of the software decoding ctcsspl tones. Whistler ws1040 dgtl hndhld rdio scn 1040 have a question. This subaudible tonecontrol system was originally developed by motorola. Buy whistler whiws1040b whistler digital handheld scanner with fast shipping and toprated customer service. Sep 05, 2014 heres my periodic whine about adding ctcss and dcs decoding to sdrconsole. Whistler digital handheld scannerws1040 the home depot. A ctcss decoder is based on a very narrow bandpass filter which passes the desired ctcss tone. Both actrive high and low outputs are available simultaneously.
Ctcssdcsnac tone decode ctcss and dcs subaudible squelch coding is processed by the same powerful dsp chip that is used for p25 digital decoding. Ws1065 desktop digital trunking scanner red dog radios. In simple terms, this feature lets your scanner ignore signals you dont want to hear. A homemade replacement for the fts8 subtone encoder. The tone is then sometimes called sub audible because its below the range of. Comtekk multi 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, ctcss pl tones, and dtmf codes. Probando pluing decoder subtonos en software radio sdr en vhf, 145. Decoding the secrets of ctcss while most rigs can send these lowfrequency audio tones, decoding them is a handy trick, too. Whistler whiws1040b whistler digital handheld scanner. Simon, im wondering if you have considered this for any upcoming versions of the software for those of us using it in the vhf and above bands. Lock out found frequencies and continue searching in the same band. This data is subaudible with most of its energy below 300hz. Ltr home repeater automove automatically moves the frequencies to the proper home repeater slots as transmissions are received on the system. Midians tds1 is an encoder and decoder of ctcss and dcs tones.
The audio input of the computer must be connected to the discriminator of the receiver. You may discover it while youre puzzling over the fact that a particular repeater seems deaf to your signals. Three power options power the scanner using batteries rechargeable or nonrechargeable. Tune find new and unlisted frequencies starting from a.
Whistler ws1065 digital police scanner scanner master. Dcs digital coded squelch is digital data or code word that is transmitted with the voice audio. Im sure some people might like the ability to set these tones on various signals to squelch out unwanted interference, but i like to chase tropo dx when conditions. A soundcard decoder for dcs and ctcss subaudible signalling introduction this program is a sound card decoder that will display received digital coded squelch dcs codes and continuous tone coded squelch ctcss frequencies when connected to a radio receiver. Police scanners the leading glock forum and community. A convenient control line can be used to manually unmute the receiver to allow monitoring the channel when desired, and a high pass filter gets rid of annoying tone buzz in the speaker audio. Errors can occur because of unwanted low frequency energy. Unlike ctcss continuous tone coded squelch system which uses continuous tones below 300 hz. Whistler digital desktop mobile radio police scanner. You may find this useful when you cannot recall the ctcss frequency that the other persons in your group are using. Radioraft is a multimode radio data decoder software, created by francois guillet, f6flt. Subaudible squelch decoder spectrum sweeper advanced feature for finding active frequencies. Features include reverse burst squelch tail elimination, timeout timer, penalty timer, and more.
Provides fast and reliable decoding of subaudible squelch signaling with squelch tail elimination. Product information cml semiconductor products publication d4653 november 2004 advance information fx465 brief description the fx465 is a 3volt, halfduplex predictive continuous tone controlled squelch system ctcss encoder decoder microcircuit. Ctcss continuous tone coded squelch system and dcs digital coded squelch. 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 checking the programming. 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. It allows decoding the most of the data transmission modes used by many services. Powerful spectrum sweeper quickly sweeps the scanners frequency ranges for transmissions from nearby sources. When its analog i keep kgtones volume level at midrange and it shows the subaudible tone and passes the audio like a champ. These include the 38 ctcss tones plus splits and 106 dcs codes, as well as custom tones. One of the radios that used this module was the ft736 multiband, multimode fullduplex vhfuhf rig. Comtekk multi decoder will listen for any sustained tone signal and display the frequency or frequencies. If you have first hand experience with it decoding and logging ctcss tones, maybe a screenshot of the log, id give it a try in a heartbeat.
The scanner features scan list feature allows to arrange and scan objects according to reference. Easier to read pro18 digital scanner and iscan software. Satellite radio networks send down a 25hz, or 35 hz audio tone that the local radio station detects in order to play its local spots. The best subaudible squelch decoder in the scanning industry ctcss and dcs subaudible squelch coding is processed by the same powerful dsp chip that is used for p25 digital decoding.
Where more than one group of users is on the same radio frequency. 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. By ken collier, ko6ux if youre an fm operator, youll encounter ctcsscontinuous tonecoded squelch systemearly in your ham career. Three power options power the scanner using batteries rechargeable or nonrechargeable, external ac power using supplied ac adapter, or dc power using a dc adapter, not supplied. In telecommunications, continuous tonecoded squelch system or ctcss is one type of. Tune find new and unlisted frequencies starting from a specified frequency. Continuous tonecoded squelch system the radioreference wiki. Spectrum sweeper quickly sweeps the scanners frequency ranges for transmissions from. Buy whistler whiws1065b whistler ws1065 digital desktopmobile radio scanner at. Whistler whiws1065b whistler ws1065 digital desktopmobile.
The program processes the audio signal from the receiver connected to the pc. Ctcss is a system whereby a not really subaudible tone is. While most rigs can send these lowfrequency audio tones, decoding them is a handy trick. Subaudible squelch decoder ctcss and dcs subaudible squelch coding is processed by the same powerful dsp chip that is used for p25 digital decoding. Cdcss or digital code squelch dcs is a further development of the. Subaudible squelch decoder provides fast, reliable decoding of subaudible squelch signaling with squelch tail elimination. The ct30 is a ctcss decoder encoder on a single printed circuit board. Scanscope decodes dcs ctcss and selcal signalling received on your radio. Introduction this program is a sound card decoder that will display received digital coded squelch dcs codes and continuous tone coded squelch ctcss frequencies when connected to a radio receiver. The use of carrier squelch and subaudible tone greatly reduces the probability that the receivers squelch will falsely open if no signal is present or, possibly, if the wrong signal in the case where a listener is an an area of overlapping repeaters is. Whistler ws1040 digital handheld scanner hitech wireless. Ctcss encoder decoder board by masters communications.
The unit also quickly sweeps the scanners frequency ranges for transmissions from nearby sources. The v scanner technology allows to save complete radio configurations within the radio. P25 nac functionality alert led and audible alarms high speed usb pc interface. It provides fast and reliable decoding of subaudible squelch signaling with squelch tail elimination. Dcs digitalcoded squelch adds a continuous subaudible baseband. Ctcss subaudible tone decoder reveals repeater access tones. 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. Many yaesu transceivers from the 1990s and thereabouts could use an optional fts8 module, that provided subtone generation for transmission, and subtone decoding for ctcss reception.
Not encoding a tone on the output makes it easier for users to program the repeater in. Upon decoding a valid pl tone, the board gives a logic change. However is does have a wide bandwidth from 2 to 300 hz. Dcs digital coded squelch decoding requires receiver with discriminator or demodulator.
Ctcss and dcs subaudible squelch coding is processed by the same powerful dsp chip that is used for p25 digital decoding. And the subaudible squelch decoder provides fast, reliable decoding of subaudible squelch signaling with squelch tail elimination. If you have first hand experience with it decoding and logging ctcss tones, maybe a screenshot of the log, id give it. The fx465 has integral voiceband filtering for prefiltering of tx audio and the. What i would be interested in would be the ability to decode subaudible ctcss and dcs information from narrow fm vhfuhf transmissions and have them appear somewhere in the console. Ctcss dcs cross tone 2 ctcss frequency scan this function scans through all ctcss frequencies to identify the incoming ctcss frequency on a received signal. The subaudible squelch decoder ctcss and dcs subaudible squelch coding is processed by the cpu. One thing i would love to create is a subaudible tone decoder. Gre america psr600 digital triple trunking desktopmobile. Whistler desktopmobile digital radio scanner ws1065 best buy. The large backlit lcd is four lines by 16 characters. These products encode standard ctcss tones, split tones, and digital coded squelch dcs. Upscale scanners can be optioned with a subaudible tone decoding squelch circuit.
The receiver can be set to only open its squelch if this tone is received. Another nice feature ive discovered with this software is that it very nicely passes the unfiltered audio to dsd, and also passes audio of the received signals to your pc speakers. Fm squelch and subaudible tone detection on the mchf in a previous installment adding fm to the mchf sdr transceiver link i described how the demodulation of fm signals was added to the mchf sdr transceiver but being able to receive fm implies the addition of a few other features, namely that of squelch circuitry of both carrier. Ctcss decoder with arduino from a friend of mine i got an ideea for a complex repeater controller, able to work with 4 radios. Ctcss decoder encoder sub audible tone decoder based on aa a mx165cp from mxcom this plan is an ideal mod for old fm tx, without tone sqelch. Ctcss dtmf tone decoder encoder iw5edi simone hamradio. Qtext is great but still, much easier with the software. Early squelch systems were based on subaudible tones that were.
Whistler digital desktop radio scannerws1065 the home depot. But if too many errors occur, you may experience some blocking out of the decoder. By transmitting a low frequency audio tone subaudible to the radio and. I was wondering if i could build such a decoder using the arduino, via one of the analog input pins. In amateur radio service it is often used as an interference mitigation technique. If tone squelch is not configured on the receiver, practically any fm receiver will open the squelch whenever the received signal is strong enough, regardless of the presence of any particular subaudible tone or code, because it is not filtering based on any particular subaudible tone. In sdrradio i set the playback device to my virtual audio cable or the free vb audio virtual cable, and then kgtone passes the audio.
Ctcss dcs tone decoder and frequency counter youtube. Zeromatic enhances the scanners ability to lock on to the actual center frequency of a search hit instead of an adjacent frequency. Provides fast and reliable decoding of subaudible squelch signaling with squelch. Some radios do not remove this energy before transmission and can cause voice blocking of the decoder. 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. It is common for a single radio channel to be shared over a number of user groups for frequency use efficiency. The whistler whiws1065 is a digital handheld scanner used for scanning purpose. Multi tone decoder software download scanner master. The object oriented user interface provides common data entry, browsing and control methods.
It does this by adding a low frequency audio tone to the voice. 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. Whistler digital desktop mobile radio police scanner ws1065. The dcs decoders can be effected by voice energy that falls below 300 hz. What makes it so easy to use is the software that allows you to program the scanner.
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