WebAug 15, 2015 · CTCSS is a circuit that is built into your radio to help reduce the annoyance of listening to other users on a shared two-way radio communications channel. CTCSS is an analog system that, when … The generic name is CDCSS (Continuous Digital-Coded Squelch System). The use of digital squelch on a channel that has existing tone squelch users precludes the use of the 131.8 and 136.5 Hz tones as the digital bit rate is 134.4 bits per second and the decoders set to those two tones will sense an intermittent signal … See more In telecommunications, Continuous Tone-Coded Squelch System or CTCSS is one type of in-band signaling that is used to reduce the annoyance of listening to other users on a shared two-way radio communication … See more CTCSS tones are standardized by the EIA/TIA. 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 … See more In non-critical uses, CTCSS can also be used to hide the presence of interfering signals such as receiver-produced intermodulation. Receivers with poor specifications—such as scanners or low-cost mobile radios—cannot reject the strong signals … See more Radio transmitters using CTCSS always transmit their own tone code whenever the transmit button is pressed. The tone is transmitted at a low level simultaneously with the voice. This is called CTCSS encoding. CTCSS tones range from 67 to 257 See more Some professional systems use a phase-reversal of the CTCSS tone at the end of a transmission to eliminate the squelch crash or squelch … See more • Radiotelephony procedure • Signaling (telecommunications) See more
CTCSS `Tones
WebFeb 14, 2012 · CTCSS employs sub-audible tones — which are below the normal 300 Hz to 3,000 Hz voice range of the radio — and uses 67 Hz to 254 Hz tone modulation placed upon the carrier with the voice traffic. These tones are selected from an industry-wide accepted list of tones (see below) and generally are available in your radio’s programming selection. WebJul 3, 2024 · The transmitted tone is necessary to "open up" most repeaters so that you can talk on them. "CTCSS", displayed as "CT" on the main screen, selects tone encoder + … irs direct hire events
【对讲机的那点事】对讲机亚音CTCSS与CDCSS - 搜狐
WebNov 17, 2005 · In CTCSS/CDCSS decode modes there are more options. Let's talk about unmuting first. Standard unmuting allows the correct CTCSS/CDCSS detection alone to determine when the receiver unmutes. AND unmuting involves both the carrier squelch circuit AND correct CTCSS/CDCSS decoding to unmute the receiver. The carrier … WebNov 14, 2024 · Digital-Coded Squelch (DCS) Digital in-band signalling used to squelch and manage transmissions on a given frequency. Digital-Coded Squelch (DCS), generically known as Continuous Digital-Coded Squelch System (CDCSS), was designed as the digital replacement for CTCSS. In the same way that a single CTCSS tone would be … WebApr 7, 2024 · To chyba jedna z najbardziej skomplikowanych spraw związanych z łącznościami w FM-ie. W tym filmie próbuję nieco rozjaśnić temat kodów CTCSS i DCS. Czy mi si... irs direct jackson hewitt