ETSI - TS 103 236
Electromagnetic compatibility and Radio spectrum Matters (ERM); Continuous Tone Controlled Signalling System (CTCSS) and Digitally Coded Squelch Signalling (DCSS) system
| Organization: | ETSI |
| Publication Date: | 1 January 2014 |
| Status: | active |
scope:
The present document contains technical requirements for Continuous Tone Controlled Signalling System (CTCSS) and Digitally Coded Squelch Signalling (DCSS).
CTCSS and DCSS systems allow the audio in a receiver to be selectively enabled/disabled on receipt of a specific tone/code. These tones/codes are transmitted continuously during the transmission so the receiver would normally implement suitable process to remove them from the wanted audio signal.
The present document specifies signalling systems that may be used with analogue FM voice equipment complying with either EN 300 086-1 [i.1]/EN 300 086-2 [i.2] or EN 300 296-1 [i.3]/EN 300 296-2 [i.4].
The present document only applies to equipment that employs frequency or phase modulation.
The scope of the present document is similar to prior national standards [i.5], [i.6] and aspects of international standards [i.7].
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