nRF51822 image frequency

[Simon Third]

Hi All,

I am starting the process of getting our product Bluetooth RF PHY tested, and our lab has asked an interesting question.

What is the image frequency of the nRF51822? This is in relation to the RCV-03 test. I found a Rohde & Schwarz document that suggested it was 1MHz for BLE, but then said it could be manufacture dependent.

Any help would be appreciated as testing starts next week.

BR Simon

[Øyvind Karlsen]

Hi Simon,

Attached is an example PIXIT, as you can see the image frequency is 4MHz above the channel frequency.

Attached PIXIT

Best regards,

Øyvind

[Nick Pelis]

This is really helpful, thanks!