NRF52832 - Power spikes in eddystone example

[Martin]

Hi

I managed to get the eddystone example up and running on my custom board with NRF52832 (DCDC configuration). external HF, but no LF XTAL.

However, using SDK 17.0.2, I see spikes which hit 14mA current consumption.
What is the reason for this?

[Jared]

Hi there,

That doesn't quite look like an advertising event.

1. Can you describe your measurement setup?
2. Are you using the PPK2, in source mode or in ampere mode?
3. How is the board supplied, by USB? A laptop USB port is usually a  bit noisy, it's better to use for example a power bank to supply if you're using USB. 
4. Have you been able to replicate this on a development kit?

regards

Jared 

[Martin]

Hi

I have the device supplied over PPK1, which is powered from a hub with external power supply.
Usually I found it is not very noisy.

Reworking it to the DevKit would be a big hassle...

Any ideas?

[Jared]

Hi,

Can you share a bit more zoomed out plot? Is there any other peaks before the "peak pattern" in your plot repeats. 

regards

Jared 

[Martin]

I'm currently not in office to produce a new plot.

It always happens at the advertisement interval. it is really puzzling me, because I can't really pin the exact point down where it happens...

[Jared]

Hi,

Well, it's difficult to say as the plot doesn't look like advertisement events. It would be good if you could update this case when with a new plot, and see if the pattern is repeating accordingly to the advertising interval. 

best regards

Jared

[Martin]

Hi Jared

it is very puzzling, as I see no reason why this is happening...

Checkout the screens.

Cheers

Martin