Hello all, I am re-sending the following email since I didn't get confirmation email. Sorry if it is duplicate.
Regards, Hakan ---------- Forwarded message ---------- Hello all, I am playing with my new HackRF One which I bought at Defcon. I thought that SDR courses at https://greatscottgadgets.com/sdr/ is a good start. I did the first diagram which Michael Ossman shows. It seems to be working great at first. However, I realize that, whenever the difference between channel_freq and center_freq is greater than 6Mhz (6e6) the result frequency was getting corrupted. For those who don't know the first SDR lesson, my problem is, when I tried to multiply 100e6 with a frequency greater than 6e6, resulting frequency becomes something that shouldn't be. For example multiplication of: 105e6 with -2e6 generates 107e6 with no problem 104e6 with -3e6 generates 107e6 with no problem 105e6 with -4e6 generates 107e6 with no problem 103e6 with -5e6 generates 107e6 with no problem but, 98e6 with -9e6 generates 97e6. I also checked it from the radio and it was really 97Mhz. At first I thought that it may be because of my CPU which couldn't generate 9MHz signal. So, I drop the sample rate to 2M but it didn't work. However, the resulting frequency shifted a little bit left or rigt to the 97.0Mhz. This my be a so easy question but I really couldn't find any explanation. Any idea would help. btw, my cpu is Intel i5-3337U Thanks Hakan
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