Hu, I'm currently sampling a 2Mhz digital data stream at 2MHz, so obviously I'm suffering quite badly from Nyquist issues. Ideally I'd like to sample at either 4Mhz, or better still 8Mhz. I understand that theoretically I can set the dongle to sample at 3.2Mhz, but that data loss is virtually inevitable. The highest reliable sample rate is 2.4Mhz. So my questions are:
1) What is the cause of the data loss? - is it in the dongle, or in the PC chipset, or in the PC driver/DLL software? 2) Has anyone tried increasing the crystal frequency in the dongle - i.e. overclocking it? Suppose I change the 28.8Mhz for a (28.8 * (4.0 / 2.4)) = 48Mhz one, will that allow me to sample at 4Mhz by using the settings for 3.4Mhz? Obviously there in no gaurantee that the RTL2832 will work at all if you overclock by too much. Cheers Malcolm
