I'm trying to receive signals with XB-200 using a center frequency under 1MHz.
There seems to be some peaks like spurious components in a spectrum, even though any transmitter isn't connected.
The spectrum shows positive and negative peaks at the same frequency as a center frequency when the Nyquist frequency is higher than the center frequency. (freq700kHz_sampling2MHz.PNG)
When the Nyquist frequency is lower, returning components appear. (freq700kHz_sampling1MHz.PNG)
Is a similar spectrum seen in your environment when using a center frequency under 1MHz?
If that happens, could you suggest the reason, and some workaround to eliminate these peaks?
I attached a diagram of a simple model I confirmed.
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