Hit-A-STAR Receiver Hardware

Overview

Block Diagram

• The first block is a nine-band bandpass filter designed by Peter, G3XJP. It is currently published in RadCom.
• Following, there's an H-Mode mixer, also a design of G3XJP, known as the Magic Roundabout. The design also includes the IF amplifier which follows (or precedes, depending on the -dynamic- configuration).
• A barefoot DDS (following the STAR transceiver philosophy) is used.
  • Pro : very low phase noise.
  • Con : spurs.
  Pic'n Mix is not used, and this board features only the DDS.
• The second IF mixer, amplifiers, etc... are on the second IF board which is part of the Pic-A-STAR design.
• The DSP board is the second part of Pic-A-STAR. It features software filters and detection.
• The speaker block represents all the AF section, to minimize the width of the graphic.
• Not displayed on the block diagram are the controller and display boards.