PCI-based PCM Bit Synchronizer Board TSNCxx-400 

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Features

  • IRIG PCM FormatsThe PCM Bit Synchronizer card is a multifeatured, digitally-controlled bit synchronizer that provides state of the art BER perfo
  • Selectable Loop Bandwidths
  • BER Performance Better than 1.0 dB
  • Complete Programming Documentation and Stand-alone Setup Software
  • Optional Convolutional (Viterbi) Decoder and Deinterleaver
  • Built-in Self-test Pattern Generator
  • Optional Support for QPSK PCM Streams
  • Optional On-board Simulator
  • Tunable Bit Rates Up to 40 Mbps
  • Occupies Single PCI Slot
  • Selectable PCM Output Codes


Introduction

The PCM Bit Synchronizer card is a multifeatured, digitally-controlled bit synchronizer that provides state of the art BER performance. The TSNC bit sync excels in harsh noise conditions with signal-to-noise capabilities superior to every other board and box level unit in its class.

The TSNC module represents a breakthrough in high-speed digital bit synchronizers. Its patented phase-lock loop and tracking features enable the TSNC bit sync to attain performance levels equal to box-level bit synchronizers costing two to three times as much.

Occupying a single PCI bus card slot, the TSNC bit sync provides complete front-end flexibility to the system integrator. Programmability includes selection of source and impedance, input code type and polarity, bit rate, loop and tracking bandwidths, output code, and clock phase.

An optional on-board convolutional (Viterbi) decoder provides programmable symbol inversion and symbol order, differential conversion, and descrambling. An on-board encoder is also provided. Optional (30,116) Interleaver/Deinterleaver supports Space Network Users Guide (SNUG) and Consultative Committee for Space Data System (CCSDS) specifications.

The TSNC bit sync is used in PCM applications where noise-reliable solutions are required for noise perturbation problems. Our bit sync design, which has received a U.S. patent, uses the low-power, high-reliability circuit components of today’s technologically advanced markets. The automatic self-calibration of internal filters provides built-in adjustments over the lifetime of the board to offset the inevitable problems of component aging.

The PCM Bit Synchronizer card is a multifeatured, digitally-controlled bit synchronizer

Input Signal Codes NRZ-L/M/S, BIØ-L/M/S, DBIØ-M/S, DM-M/S, MDM-M/S, RZ
  Level 250 mV to 10 volts peak-to-peak
  Derandomizer Forward & reverse, 5 lengths; 9, 11, 15, 20, 23
  Impedance 75 ohms, or 10K ohms, 50 ohms available (RS-422 = 110 ohms)
  Sources & Type Four external data inputs, single-ended or differential (RS-422–Source 4 only, jumper-select); only Source 4 with low power option
  Polarity Normal or inverted (programmable)
  Loop Bandwidth 0.004% to 5% (programmable; 0.004% resolution)
  Operating Range 10 bps to 20 Mbps; option to 40 Mbps
  (NRZ codes)  
  Operating Range 10 bps to 10 Mbps; option to 20 Mbps
  (All other codes)  
Performance Bit Error Rate Within 1.0 dB of theoretical curve up to maximum data rate
  Acquisition Range Up to +/- 5% of programmed data rate, Eb/No = 15 dB
  Acquisition Time Within 50 bits, average, random data within 0.5% deviation from the programmed data rate, Eb/No = 15 dB
  Sync Maintenance Retains sync with NRZ codes at Eb/No  = 3 dB with 128 bit transition gaps occurring every 1024 bits with random data
  Bit Slippage Maintains phase with BIØ codes at Eb/No  = 12 dB with over 2000 continuous 1's or 0's, at Eb/No = 0 dB with random data (NRZ & BIØ)
  Tracking Range Exceeds +/- 20% of programmed data rate
  Baseline Variation No degradation beyond 1 dB from theoretical performance curve with super-imposed wave form equal to 100% of the peak-to-peak signal input at 0.1% of the bit rate, BIØ codes
  DC Offset 100% of input signal level up to +/-10 Volts
Output NRZ-L Data TTL compatible into 50 ohms, and RS-422 Differential, with 0° clock
* Selectable Data (x2) Programmable PCM, TTL compatible into 50 ohms, and
RS-422
* Selectable Clock (x2) Programmable 0° and 180°, phase, TTL and RS-422 outputs
* Selectable Data +/-1V into 50 ohms
* Optional Decoder (Per CCSDS & SNUG) Optional on-board decoder, Rate 1/2 and Rate 1/3, constraint length 7, accepts 3-bit soft-decision input (internal bit decision). Programmable symbol order and inversion and differential decoding
* Optional Deinterleaver Periodic deinterleaving (30,116) with SNUG cover sequence
(per CCSDS & SNUG)
Electrical and Environmental Form Factor Full length PCI card
  Temperature 0° to 50 °C (operating), -20 °C to 80 °C (storage)
  Humidity 20 to 95% noncondensing
* Power +5V @ 1.5 amps, +12V @ 0.480 amps, -12V @ 0.520 amps Low Power Option: +5@ 1.3A, +12V to 90 mA and –12V to 60 mA
  Status Sync, input, amplitude, rate deviation via PCI bus
  Connectors D-type connectors on card edge
  Programming Programming via PCI bus, 32-bit
Ordering Codes TSNCxx-400 PCI Bit Sync, xx = 20 or 40 (Mbps)
  TSNCxx-400-C03 PCI Bit Sync Option: Convolutional (Viterbi) Decoder
  TSNCxx-400-D03 PCI Bit Sync Option: Deinterleaver/Decoder
* TSNCxx-400-LPx Low Power PCI Bit Sync, xx  = 20 or 40 (Mbps); excludes decoder options
Accessories Software Stand-alone Windows® loader included with board
  Documentation Technical Reference Manual; installation and program information

 

All specifications subject to change without notice.  
Revision Date: Feb09
       
Tel 301.737.1555
Fax 301.737.1564