QRP2000 si570 USB Synthesizer Kit
QRP2000 USB-Controlled Synthesizer Kit - This easy to build project can generate almost any frequency between 3.5MHz and over 200 MHz (160 MHz guaranteed for CMOS) with a resolution of less than 1 Hertz using the Silicon Labs Si570 Programmable Crystal Controlled Oscillator device. Other Si570 oscillator chip versons can provide for expanded frequency coverage, as noted in the tables below. An Atmel ATTiny 45 or ATTiny 85 microcontroller interfaces the Si570 via the I2C bus to the USB bus, then to a Personal Computer. The frequency of the Si570 can be set using popular SDR Applications like PowerSDR, WinRad, Rocky or a standalone Si570 USB control program.
Order kits from http://km5h.softrockradio.org/ in the USA or directly from http://www.sdr-kits.net/Webshop/
QRP2000 Images
Top View of QRP2000
Bottom View Showing Location of Si570
QRP2000 Specs
The QRP 2000 specifications are based on the Si570 used as shown in the following tablea:
Note: Only the Si570CAC CMOS 210 and Si570BBC LVDS 280 models are available in the USA.
QRP2000 USB-Controlled Synthesizer Main Page
QRP2000 Assembly Manual
Si570 Data Sheet