USB-Synthesizer - SDR-Kits

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SDR-Kits.net QRP2000 USB-Controlled Synthesizer Kit Assembly v2.03cSetting Frequency:Enter the desired frequency in the Window MHz Example frequency entered 16.400 MHz click “set freq by value” click “read SI570 registers”Following screen should be displayedSDR-Kits.net © 2008 & 2009 by QRP2000 Design Page 20 of 28
SDR-Kits.net QRP2000 USB-Controlled Synthesizer Kit Assembly v2.03cEND OF FUNCTIONAL TEST PROCEDURE7. INTERFACING TO SOFTROCK RXTX V6.1 or V6.2 TRANSCEIVERThree connections are required to connect the USB-Synthesizer to the RXTX V6.x transceiver asfollows:( ) Prepare a 10cm (4 inch) length of RG174 miniature coaxial cable by removing 1 cm plastic ateither end of the cable. Next remove 3mm insulation from the inner conductor at both ends.Fig 5: Preparation of 10cm 4 inch Coaxial cable( ) On RXTX PCB, disable the Crystal Oscillator by removing 2 pin Jumper from JP2.( ) On RXTX PCB remove 2 pin Jumper from JP1.( ) Solder Inner conductor of coaxial cable to JP1 pin 2 as shown in fig 5 below:SDR-Kits.net © 2008 & 2009 by QRP2000 Design Page 21 of 28
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USB-Synthesizer - SDR-Kits

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