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All Pools >> Amateur Extra >> E7F




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E7F01 : What is meant by direct digital conversion as applied to software defined radios?

  -  Software is converted from source code to object code during operation of the receiver
  -  Incoming RF is converted to a control voltage for a voltage controlled oscillator
  -  Incoming RF is digitized by an analog-to-digital converter without being mixed with a local oscillator signal
  -  A switching mixer is used to generate I and Q signals directly from the RF input

Correct Answer: Incoming RF is digitized by an analog-to-digital converter without being mixed with a local oscillator signal