User's Manual

1 System Description
1.1 Introduction
The DATA-20 is a spectrum-scalable point-to-point digital radio that can deliver 8Mbps of data.
Advanced modulation and digital processing techniques allow one radio to deliver user-defined
rates from 512 kbps to 8Mbps
The product is an all-digital, open-architecture, modular system (see Figure 1-1 below). The
versatility and power of the product comes from a complete range of “plug and play” personality
modules.
Figure 1-1. DATA-20 Modular Open Architecture
The high spectral efficiency of the DATA-20 is achieved by user-selectable QPSK, or 16 QAM.
Powerful Reed-Solomon error correction, coupled with a 20-tap adaptive equalizer, provides
unsurpassed signal robustness in hostile RF environments.
1.2 System Features
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Selectable Rates: 512 kbps to 8.448 Mbps
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Selectable Spectral Efficiency of 1.6 or 3.2 bps/Hz
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QPSK & QAM Modulation
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Powerful Reed-Solomon Error Correction with up to 12 level interleaver
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Built-in Adaptive Equalizer
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Internal Duplexer or external for hot standby system
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Independent Synthesized Tx & Rx units