During an advertisement break a signal is transmitted from the central TV station. The regional stations decode the signal and relay contacts switch opt-out outputs to control video play-out of local advertising. There are various encodings used to control opt-out switching and each channel may be configured to one of over a dozen different methods.

The ATP950 has two isolated sets of relay contacts and two led indicators for each video channel. A serial port allows the unit to be set up and monitored with a terminal emulator.

Main Features include:

  • The unit decodes the following types of opt-out control signal:
    Inverted teletext on pages 101, 201, 301 or 401
    Eurosport and MTV packet 31
    National Geographic page 70A (two types)
    MRG Packet 8/30/3 optouts
  • Two packet 31 modes (9 and 10)
  • Flexible programmable delays can be set
  • The unit logs incoming packets for analysis together with a time stamp from the teletext service.
  • The user can specify particular CRC values as opt-out control signals.
  • Battery backed RAM to store settings.

Technical Specification

  • 6 x PAL inputs - 1Volt Composite BNC PAL unterminated input with passive loop-through.
  • Relay outputs - Twelve GPOs arranged into six channels each with both an OK and an opt-out contact.
  • Setup - RS232 serial port for configuration. 9 way male 'D' type connector.
  • Baud Rate settings - 3 available – 9600, 19200 and 38400.
  • Teletext decoders - 6 Philips MVDAC 16 Mhz devices.
  • Processor - Standard PAL 1V pk to pk composite video outputs
  • Memory - 256k SRAM.
  • Buffer - Serial buffer device converts TTL signal level.
  • Power - 230v <15va

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