![]() It is yet to be tested whether it is possible to do a real time FM radio demodulation on a faster machine for this SDR frontend which would otherwise be possible on other types of SDR frontend. We use a Dell Pentium III 800 MHz PC for this experiment which is not fast enough to do real time processing on the captured signal. The capture program take the ADC data and write it to a file for offline processing. IF bandwith is about 150-250 kHz due to filtering in the tuner itself. ![]() IF of 10.7 MHz came from the tuner itself and is feed to one of the ADC input. The result is a SDR frontend that can tune from 50 to 850 MHz and capture an intermediate frequency (IF) at a sampling rate of 27 MHz into 8 bit unsigned PCM data. In our experiment, we use a PixelView PlayTV Pro Ultra TV+FM card. ![]() With this TV card, you get a RF tuner and a high speed ADC. This article describe the idea on how to build another simple SDR frontend with what you already have : a TV+FM card based on the CX2388x (CX23880,CX23881,CX23882,CX23883) family chipset. In order to experiment with Software Defined Radio (SDR), you'll need some sort of hardware to get the digitized data in. ![]()
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