Que couvre cette garantie produits et accessoires 141 garantie limite de Let’s talk about CTCSS and DCS today. Codes ctcss ctcss hz ctcss hz ctcss hz 135 codes pl/dpl garantie limite de motorola pour les tats-unis et le canada 140 garantie limite de motorola pour les tats-unis et le canada. 134 codes ctcss et pl/dpl. See the DPL / DCS page for information on a digital coded squelch system (unlike the analog PL/CTCSS squech systems, the 23 bit DCS/DPL squelch system. The difference between PL and CTCSS is in how the optional reverse burst is implemented. The name PL is a Motorola trade mark and Continuous Tone-Coded Squelch System (CTCSS) is a generic name.
1 - 461.2625 - Channel 1 - Any one of 50 CTCSS Tones (half normal space tones) or 84 DCS Codes (023-754) availableCTCSS stands for Continuous Tone Coded Squelch System. PMR446 / SRBR / FRS Information Page. Likewise, when transmitting using CTCSS or DCS, the receiving station must have a matching tone or code to hear your call.Be aware that other parties can still hear your calls if they set up their transceiver. If a call containing a different tone or code is received, squelch will not open and you will not hear the call. You will hear a call only when you receive a signal that contains a matching CTCSS tone or DCS code.
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.Motorola calls theirs Private Line, General Electric call theirs Channel. Different CTCSS codes have different frequencies, and this is how it filters out other people – as long as they have a different CTCSS, or no CTCSS, then your radio will not pass any audio to the speaker.CTCSS stands for continuous, tone-coded squelch system, and is a technique used to allow repeatersand radiosto receive particular signals and reject others. It will also be heard if the radio has CTCSS and DCS off. Other radios must have the same CTCSS tone or code set to hear the transmission.
Motorola Ctcss Codes Full Range Speakers
If someone else transmits on the channel with a different or no DCS, the radio will not unmute. It sends a number repeatedly encoded in digital as you speak, in the low frequencies so you do not hear it. It stands for Digitally Coded Squelch. DCSDCS works the same, apart from it being digital instead. The tone is then sometimes called ‘sub audible’ because it’s below the range of THEN audible voice frequencies – but it would be audible if played on full range speakers without the filtering that CTCSS radio receivers also use on receive (we can hear down to 20Hz or so).
The FM deviation level of DCS data should be in the range of 500 to 800 Hz.Unlike CTCSS, DCS signal spectrum occupies considerable more bandwidth. At the end of the radio transmission and about 1/2 second before the transmitter un-keys, the radio will encode a 134 Hz tone that serves as a turn off code. Each code word is unique and all code words may be used on the same channel without interference. The DifferenceUnlike CTCSS (Continuous Tone Coded Squelch System) which uses continuous tones below 300 Hz., DCS uses digital data or code words. DCS is newer than CTCSS, and has more combinations.
Errors can occur because of unwanted low frequency energy. But if too many errors occur, you may experience some blocking out of the decoder. With DCS, error correction is necessary. Because of the long time constant required for the low frequency response, a step function can block the decoder momentarily. Errors in the transmitter and receiver frequencies show up a the discriminator output as a step function. The distortion risk is especially high if the frequency response delays the wide band frequency components.You will find that it is extremely important for the receiver and transmitter to be on frequency to achieve maximum performance of the DCS function.
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