Is a software modem ideally suited for digital voice transmission over HF channels using inexpensive commercial radios with reduced bandwidth.
It supports 1200/2400 bps data rates in reduced audio bandwidth 600...2400Hz.

Features:

• Supports 1200/2400 bps data rates
• Provides frame synchronization for all standard vocoders (MELP, etc.)
• Optimizes total delay for better perceptual quality
• Provides soft decision output for optimum vocoder performance
• Reach command-line interface (>50 commands) and report generator
• Adaptive equalization scheme for HF channels with big multipath spread, fading and the noise
• Reduced bandwidth requirements allow to use commercial radios
• Not sensitive to ALC/AGC and non-linearity
• Flexible test pattern generator and BER tester
• Fully portable ANSI C code
• ITU-R.F1487 compatible channel simulator for test purposes (real-time version available as an option)
• demo available for EVM6424 and for PC

Applications:

• HF radios
• HF modems
• Voice over HF
• Software Defined Radio

 
List of supported platforms:

• Texas Instruments C64xx, DaVinci
• MS Windows
  

NatureDSP IT2400 Evaluation manual for Spectrum Digital EVM6424 board.  Evaluation version for EVM6424 and PC is available upon request.