I plugged the TX of a Lime to the RX of a Blade, transmitted a 2MHz wide noise around 100MHz, and I could see it while receiving at 5700MHz. I put a band pass filter that greatly filters everything out of 5.6-6GHz and I could still see the signal at 5700MHz.
Any idea of why such a thing would happen?
I did that test because I noticed some powerful signal around 2450MHz would be visible around 5800MHz on the Blade. When using a signal generator to generate a CW at 100MHz, nothing was visible at 5700MHz.