nRF24L01 IRQ pin jitter on two modules in RX mode

RE: nRF24L01 IRQ pin jitter on two modules in RX mode

Andrew — Wed, 15 Nov 2017 08:06:17 GMT

Hello! Can you explain this jitter? May be defective modules nRF24L01? I bought them on aliexpress.

RE: nRF24L01 IRQ pin jitter on two modules in RX mode

Hung Bui — Wed, 19 Jul 2017 07:22:40 GMT

Sorry I forgot to attach the link to the example here it is: devzone.nordicsemi.com/.../

From your video, it seems that the distribution of latency mostly at +-0.5us and around 0us. I don't have an explanation for now. I will try to check with my colleagues who have more experience with the legacy chip, unfortunately most of them are on vacation.

RE: nRF24L01 IRQ pin jitter on two modules in RX mode

Hung Bui — Tue, 18 Jul 2017 11:01:22 GMT

Hi Andrew,

Could you upload the images directly on your question ? The website yadi.sk can't get through the firewall at Nordic. The video file you can upload to youtube maybe.

1us seems to be quite big jitter. Here we have an example of time synchronization, it's for the nRF52 but the radio pretty similar to L01+. the author achieve 60ns mean difference . This is when compare the TX and RX not between RXs.