The SRL QuickSilver QS1R receiver is one of the most advanced Open Source Direct Digital Conversion (DDC) receiver boards on the market today. It features a LTC2208 125 MSPS 16 bit "at the antenna" ADC from Linear Technologies and an Altera Cyclone 3 FPGA. The QS1R covers the frequency range of 15 kHz to 55 MHz. Connectivity to the PC is through a high speed USB 2.0 interface.

The SRL QS1R features expandability with an I2C and SPI/Microwire expansion bus. Also planned is a PCI interface version of the QS1R with accompanying DAC/transmitter board as well as various VHF/UHF/Microwave add-on boards.

The SRL QS1R_SDRMAXII group was created to provide a support forum for the QS1R Receiver and the accompanying SDRMAXII open source SDR software application. Currently SDRMAXII runs under Windows. A Linux version will soon be available. Integration with GNU Radio is also planned.

The Windows based SDRMAXII software source code is supplied as a Visual C# Express 2008 project. Visual C# Express 2008 can be downloaded from Microsoft and is free (as in beer). SDRMAX3 uses Qt 4.5 for cross platform on Windows, Linux, and OSX. SDRMAX3 is under heavy development and available as a beta download. All software, firmware, and FPGA HDL for the QS1R product is released open source under the GPL 3 License.

The SRL QS1R and accessory boards will be available for purchase completely assembled and tested. The SRL QS1R is manufactured in Columbus, Ohio by Software Radio Laboratory LLC.

IMPORTANT LINKS:

Website: <http://www.srl-llc.com>

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SVN INFO: <http://code.google.com/p/qssdrcode/>
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SVN: <http://qssdrcode.googlecode.com/svn/trunk/>
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QS1R WIKI: <http://qs1r.wikispaces.com/>
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