Bit Sync

NetAcquire Bit Sync with Clear SyncTM Technology

NetAcquire Clear Sync technology integrates a state-of- the-art bit sync front end into the field-proven PCM serial capabilities of any NetAcquire product.

  • 20, 30, 40, and 60 Mbps performance options
  • Maximum data quality and noise rejection
  • Data encapsulation feature sends data quality information to remote location as either PCM or network
  • Integrated in one unit with frame sync, decommutation, and networking
  • Remote network configuration and advanced status monitoring
  • Up to 16 channels in one unit

Clear Sync design emphasizes data quality; its digital design has no analog components that could drift out of calibration and affect performance. Each input channel uses a digitally controlled low noise floor, tunable automatic DC offset removal, and automatic gain control (AGC). The system’s super high-speed analog-to- digital (ADC) converter features an ultra-low jitter sample clock input. The ADC runs at a higher resolution, 12 bit and higher speed extreme multiples of the bit rate, to extract maximum information from the input signal. Over-sampling in amplitude and frequency provides the ultimate data quality input to the Clear Sync digital signal processor.

The FPGA-based digital processor implements a high precision phase detector and sophisticated multi- loop tracking PLL with capabilities well beyond the analog domain while offering superior performance monitoring and software tuning. Next generation output clock frequency synthesis tracks to better than 0.1 parts per million (0.0000001%) resulting in highly accurate bit tracking without data edges — even in the presence of high noise. Best of all, as NetAcquire algorithms advance, Clear Sync provides in-field software and FPGA upgradeability, protecting your investment for the long term.

Clear Sync operation is controlled and monitored from any authorized, network-connected computer. This feature allows users to view real-time plots of the operation and change the input source, loop bandwidth, or other parameters from any computer on the network whether it is in the lab, in a different building, or across the range. Better confidence in the bit sync tuning yields more consistent signal quality. A sophisticated signal quality metric is continuously computed; this real-time data quality value is user-optionally included in the PCM serial or network output from the Clear Sync system.

Built-in enhanced diagnostics allow remote system configuration and adjustments. For example, if the programmed bit sync rate is incorrect and no data is being received, a technician no longer needs to go to the antenna to adjust parameters. Now users can change any parameter from their desk.

Features

  • Advanced network-based GUI control and scrolling chart status
  • Tight integration with frame sync, decom, and network output
  • Leading edge digital design
  • Bit sync up to 60 Mbps, 16 input channels per 4U chassis
  • 0.1 to 3% Loop Bandwidth adjustable in 0.1% steps
  • 0.2 to 24 Vpp input range with DC offset removal
  • Automatic tracking range limit with user override option
  • Viterbi decoding and ambiguity resolution options
  • Industry-unique “reverse direction” network data to PCM serial output
  • Real-time data quality measurement can be included in output PCM or network data stream

Advanced Real-Time Graphical Status

  • Frequency tracking or frequency deviation tracking over time
  • Signal amplitude level tracking over time
  • Real-time graphing of input signal quality metric (SNR, E b /N 0 )
  • At-a- glance continuous signal, bit lock and frame lock status

Powered by NetAcquire™

Every NetAcquire system is built on top of advanced network-centric NetAcquire software architecture; benefits include built-in configuration and monitoring using any standard Web browser, security management with individual user passwords, and real-time parameter monitoring and graphing. All NetAcquire systems support software upgrades via the network; as networking protocols change, your investment is preserved. Advanced optional features include decommutation, correlating source selection, data archiving, data reformatting, publish/subscribe, BERT, simulation, and time synchronization.

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