Bluetooth Qualification - RF-PHY

[Nick Pelis]

Hello Nordic--

We're most of the way through qualification testing on an nrf51822 and the testing house had a question about the PIXIT values for RF-PHY testing. I sent them the PIXIT values Nordic suggested from here and they replied back saying that the test fails when the values are set to 2406MHz/2444MHz/2484MHz for the low/middle/high frequency values as suggested.

They also said that most other Nordic Semiconductor devices they've tested use 2404MHz/2442MHz/2482MHz as those parameters and that when they re-test our device using those values, the tests pass.

So my question is, which are the correct inband image frequency values?

[Håkon Alseth]

The inband frequency is (2400 + NRF_RADIO->FREQUENCY + 4) [MHz]. Normal test cases are channel 2/40/80 (ie: low, mid, and high channel)

Looks like the test house has used "+2" instead of "+4" as the inband frequency offset. Not a huge problem, as the test still passes.

Cheers, Håkon

[Nick Pelis]

OK, thanks.