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CRU - The Center of the S•Land System

The Seismic Instruments Central Recording Unit (CRU) is designed to interface the field telemetry units with the Operator Console Computer. The Unit has two lines (A, B) for the field equipment and four optional auxiliary channels. It also communicates with the energy source control unit.  It provides multiple functions within the Cabled System.


  • Generation of the master clock for the entire recording system
  • Real-time Data Acquisition
  • Supplies line voltage which eliminates need for BBUs near the CRU
  • Providing an interface for energy source controllers
  • Synchronization of master clock and command information