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Intelligent ASI Changeover with Probing

The SCO-1421 is a 2x1 intelligent ASI change-over with built-in MPEG-TS probing. Change-overs are performed electronically by the SCO-1421's internal router. In the event of a power failure, the signal is protected by relays fitted on the rear module, maintaining the integrity of the selected signal at the output. Input selection can be performed automatically or manually. In automatic mode, the card will perform smart input selection based on rules set on signal quality. In manual input selection mode, channel selection can be undertaken from the Densité controller or the iControl software, or simply by using a GPI. A GPI can be connected to an automation system or any simple GPI control...


Key features
  • 2 DVB-ASI source inputs and 2 DVB-ASI outputs (program and preview)
  • Electronic switching with relay backup (on rear module) maintains selected input in the event of a power failure
  • Automatic switch mode ruled by internal TS probes
  • Manual change-over by local frame controller, iControl, iControl Solo
  • Switching between TS packets avoids sync drop errors
  • GPI I/O (IN 1, IN 2, AUTO, BYPASS)
  • Manual change-over by GPI
  • Alarm reporting to iControl monitoring and control system
Optional advanced probing
  • PSIP Table PID presence alarming
  • Teletext/subtitling PID presence alarming
  • Probing for complete TR 101 290 L1 and L2 probing:
    • CAT_error
    • CRC_Error
    • PAT_Error
    • PMT_Error
    • PCR_Accuracy
    • PCR_Error
    • PTS_Error
    • PID_Error
MPEG-TS signal analysis
  • Probing of up to 12 services
  • SI Table structure display
  • PID presence alarming
  • Total bit rate monitoring and alarming
  • Service PID bit rates measurements
  • Basic TR 101 290 probing and alarming:
    • ts_sync_loss
    • countinuity_count_error
    • sync_byte_error
    • transport_error


ASI Input(S)
  • Quantity/connector: Two inputs with BNC connectors
  • Standards: EN50083-9 (V2:3/98) DVB ASI
  • Data bit rate: 213 Mb/s
  • Cable length: 300m (984 ft.) Belden 1694A at 270 Mbps
  • TS packet length: 188/204 bytes per packets
  • Return loss: >15 dB up to 270 Mb/s
ASI Output (S)
  • Quantity/connector: Program and Preview outputs with BNC connector
  • Standards: EN50083-9 (V2:3/98) DVB ASI
  • Return loss: >15 dB up to 270 Mb/s
  • Jitter: <0.2 UI (0.74 ns) pp
  • Connector: Weco
  • Opto isolated
    • GPI out (4): Used for tallies to give status of selected input
  • Power: 8W


Densité 2 frame Densité 3 frame Description
SCO-1421 SCO-1421-3RU Intelligent ASI change-over with probing
SCO-1421-DRP-R SCO-1421-DRP-R-3RU Double rear connector panel with bypass relays
Options Description
SCO-1421-OPT-ADVP Advanced probing option for SCO-1421
Remote Control iControl, iControl Solo



SCO-1421: Intelligent ASI Change-Over with Probing Datasheet

The SCO-1421 from Grass Valley, a Belden Brand, is a 2x1 intelligent ASI change-over with built-in MPEG-TS probing



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