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How much time does the nrf24l01+ take to switch frequency through RF_CH? Can this switching time be parallel to switch between Tx/Rx/Standby modes?

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  • \$\begingroup\$ I've gone through 24L01 and 24L01+ documentation and I cant find any mention of time required to switch radio frequency. Only one reference to similar timing I could find was on documentation for NRF2401, which is a different (older) chip, which says upto 200us. Will the same apply? I dont have enough equipment to measure this myself, so any refence to experiments done towards this objective are also welcome. \$\endgroup\$ – GPS Oct 17 '15 at 4:56
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    \$\begingroup\$ If it's not in the datasheet, have you asked the manufacturer (Nordic)? \$\endgroup\$ – Roger Rowland Oct 17 '15 at 5:25
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    \$\begingroup\$ No I have not asked Nordic directly. I have posted on their dev forum, but not received any answer yet. devzone.nordicsemi.com/question/54019/nrf24l01-frequency-switch \$\endgroup\$ – GPS Oct 17 '15 at 5:54
  • \$\begingroup\$ I did ask Nordic a just few minutes back. Raised a ticket. If I do receive a response from them, I'll post that as answer here. Is their response likely in general experience? \$\endgroup\$ – GPS Oct 17 '15 at 6:15
  • \$\begingroup\$ I used to post in their bluetooth community, Nordic dev zone, and would usually get a response in either a day or two, or not at all. So it's kind of hit or miss. \$\endgroup\$ – NickHalden Oct 17 '15 at 7:33
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I received a response from Nordic support. Exact text as follows:

The nRF24L01+ can only change frequency in standby mode. It takes 130 µS from standby to active mode (RX or TX) regardless of you change frequency or not.

This applies for the nRF24LE1 as well.

So as it turns out, switching from standby to Tx/Rx will also setup the RF frequency without requiring any extra time.

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  • \$\begingroup\$ Though I was hoping to switch frequency without going to standby, in Rx mode.. Guess we cant have everything... \$\endgroup\$ – GPS Oct 20 '15 at 6:54

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