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An Introduction to Software Defined Radios - …
An Introduction to Software Defined Radios By Jeff Blaine, AC C July 2009 Rig types: SCR vs SDR ----------------------------------- Modern rigs are largely of the SCR variety meaning Software controlled radio. The major functions of the rig are implemented in hardware, with a dedicated microcontroller providing rig management and interface and (since the late 1990 s) usually with a DSP section to provide specialty signal processing ( filtering, noise reduction, notch). Rigs of the SCR type are generally fixed function with firmware updates (in some cases) providing somewhat optimized function, bug fixes and improved DSP performance. But the fundamental rig capabilities are limited by the manufacturer s specific hardware implementation. The SDR Software Defined radio is a generic hardware platform where the hardware has the function of converting the RF signal into a digital format in as direct and simple manner as possible. Once the signal is rendered in a digital format, all further manipulation is done exclusively in Software .
An Introduction to Software Defined Radios By Jeff Blaine, ACØC – July 2009 Rig types: SCR vs SDR ----- Modern rigs are largely of the “SCR” variety – meaning software controlled radio. The major functions of the
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