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CDMA Modulation and Demodulation Trainer ( DSSS / FHSS )

SKU: 7530 Category:

CDMA (DSSS and FHSS) Model 7530 is a comprehensive training solution for technology people, who want to explore the basics behind Code Division Multiple Access. The implementation of CDMA into practical life is so vast and intricate that it becomes really tough for beginners to get a feel of the real technology implementation. Main aims to provide this feel of technology and gives necessary understanding of the CDMA multiplexing.

FEATURES

  • On-board data generators and PRN sequence generators
  • BCD rotary switches for Data Selection
  • Tap selectable PN sequence generators
  • Multiple data rate and chip rate selection
  • Variable processing gain selection
  • Slow and Fast frequency hopping demonstration
  • PN sequence driven Frequency synthesizer with non-overlapping frequency channel assignment

 MAJOR BLOCKS

  •  Data generators 1
  • Data generators 2
  • PN sequence 1
  • PN sequence 2
  • Clock Generator
  •  DSSS Modulator 1
  •  DSSS Modulator 2
  •  Frequency Synthesizer 1
  •  Frequency Synthesizer 2
  •  FHSS Modulator 1
  •  FHSS Modulator 2
  •  Mixer
  •  DSSS Demodulator

TECHNICAL SPECIFICATIONS

  • Mains Supply : 230 V ?10%, 50/60 Hz
  • Data Source

1.Data rate : 16Kbps, 8 Kbps, 4Kbps
2.World Length : 8 bits
3.Data Format : NRZ (Non Return to Zero)

PN Sequence Generators

  • Chip Clock : 240 KHz, 120 KHz, 60 KHz, 16KHz, 8KHz, 4KHz.
  • Sequence type : Maximal length sequence
  • Sequence patterns : Selectable through feedback taps in LFSR.
  • BFSK frequencies : 100 KHz for mark and 50 KHz for space
  • Frequency synthesizer O/P : Sinusoidal
  • Frequency synthesizer frequencies : 1.6 MHz, 1.4 MHz, 800 KHz, 400KHz.
  • Hopping channels : Four
  • No. of hops per data period : Variable (selectable for slow and fast hopping)
  • Mains Supply : 5V, 12 V DC, 200 mA
  • Test Points : 44 nos.(Gold plated) BNC to BNC

Accessories :

1. Patch cord.
2. Manual.

EXPERIMENTS:

  1. Study of Data and PN Sequence
  2.  Study of Pseudo-Random Noise (PRN) Sequence
  3. Study of Direct Sequence Spread Spectrum (DSSS)
  4. Study of CDMA-DSSS technique
  5. Study of BFSK modulation and demodulation Technique
  6. Study of Frequency hopping spread spectrum

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