@rpx said in nRF24Doctor: The graph has 8 pixel high, can you give me a idea of the power scale of each pixel Each time a carrier is detected on a channel the count for the channel is increased by 1, with a maximum of 255 per channel (per bucket really). The top pixel of the chart gets set when the value is 128 or above, the next when 64 or above, then 32 etc. So kind of log2 logarithmic. It makes the chart sensitive to small counts, but also displays larger values.