We are working with LimeSDR over the 700MHz frequency with 15MHz rate and 40 gain.
When doing two spectrum measurements and changing the central frequency by 2MHz we see totally different results.
For example in image # 1 the central frequency is set to 708 MHz and the noise floor variation is from 702.5 MHz to 711.5 MHz.
In image # 2 the central frequency is changed to 706 MHz and we do not see the same noise in the frecuencies like in image #1.
We would like to understand why this is happening and whether there a way to correct it.
Central Frequencies upper 720MHz works fine.