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The amplitude modulation signalling system (AMSS or the AM signalling system) is a digital system for adding low bit rate information to an analogue amplitude modulated broadcast signal in the same manner as the Radio Data System (RDS) for frequency modulated (FM) broadcast signals.

This system has been standardized in March 2006 by ETSI (TS 102 386) as an extension to the Digital Radio Mondiale (DRM) system.

This article needs to be updated. Please help update this article to reflect recent events or newly available information. (October 2016)

AMSS data are broadcast from the following transmitters:

• SW
  • BBC World Service: 15.575 MHz

Formerly it was also used by:

• LW
  • RTL France: 234 kHz

• MW
  • Truckradio 531 kHz
  • BBC World Service: 648 kHz
  • Deutschlandradio Kultur: 990 kHz

• "ETSI TS 102 386 v1.2.1 (2006-03) Technical Specification - Digital Radio Mondial (DRM); AM signalling system (AMSS)" (PDF, 100 197 bytes). Internet Archive. ETSI. March 2006. Retrieved 2017-05-14.
• ETSI TS 102 386 V1.2.1 (2006-03) directly from ETSI Publications Download Area (account or free registration required)
• Murphy, Andrew; Poole, Ranulph (January 2006). "The AM Signalling System: AMSS — does your radio know what it's listening to?" (PDF, 172 312 bytes). EBU technical review. EBU.
• Lindsay Cornell (January 29, 2007). "The AM Signalling System (AMSS)" (PDF). [Broadcast Papers]. Archived from the original (PDF, 183KiB) on November 21, 2010.

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