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DCS (Digital-Coded Squelch), generically known as CDCSS (Continuous Digital-Coded Squelch System), was designed as the digital replacement for CTCSS. 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.
CTCSS is an analog system. A later Digital-Coded Squelch (DCS) system was developed by Motorola under the trademarked name Digital Private Line (DPL). General Electric responded with the same system under the name of Digital Channel Guard (DCG). The generic name is CDCSS (Continuous Digital-Coded Squelch System).
DCS or Digital-Coded Squelch superimposes a continuous stream of FSK digital data, at 134.5 baud, on the transmitted signal. 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.
Digital-Coded Squelch, a squelch that superimposes a continuous stream of FSK digital data on the transmitted signal; Distributed control system, a control system in which the controller elements are not central in location but are distributed throughout the system; Dwight Cavendish Systems, a manufacturer of video copy protection
FRS radios frequently have provisions for using sub-audible tone squelch (CTCSS and DCS) codes, filtering out unwanted chatter from other users on the same frequency. Although these codes are sometimes called "privacy codes" or "private line codes" (PL codes), they offer no protection from eavesdropping and are intended only to help reduce ...
Continuous Tone-Coded Squelch System (CTCSS), used by many public safety agencies, is available above 400 MHz and below 88 MHz. [6] The transceiver weighs about 12.2 lb (5.53 kg). Available accessories include remote controls, transmit power amplifiers, receive low-noise amplifiers, and ground support equipment.
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A distributed control system (DCS) is a computerized control system for a process or plant usually with many control loops, in which autonomous controllers are distributed throughout the system, but there is no central operator supervisory control. This is in contrast to systems that use centralized controllers; either discrete controllers ...