Power Profiler

[mich_x]

I am using nRF52840 and the power profiler. I am trying to measure the current to evaluate the scheduling of BLE. Now I am using the ble_uart_c example and I changed the scan_interval to 0x0100 and the scan_window to 0x0050. I hope to see a half-half plot indicating the periodic scan. However, what I get from the power profiler is a noise like plot and the amplitude is not right. Here is the configuration and plot:

PS: I did not cut the SB40 on board should I do it? I am not sure what does the document mean.

[Bjørn Kvaale]

You need to cut SB40 on the board to get accurate current measurements. I did it by using a scalpel (or a sharp thin knife) and a microscope (or magnifying glass). You might not need the microscope if you can see very accurately, but it makes it a lot easier with a microscope. You want to cut enough metal so that SB40 is not shorted anymore (see link). Also remember that the next time you want to flash an application on your nrf52 board, it is easiest to apply a jumper cable (or a shunt jumper) on P22 like it says in the link.