nRF52 LO leakage

RE: nRF52 LO leakage

Priyanka — Wed, 31 Jul 2024 13:40:09 GMT

Yes, if you are in BLE1M mode.

RE: nRF52 LO leakage

JK5 — Tue, 30 Jul 2024 22:13:57 GMT

The LO leakage frequency calculation is f_RF-1MHz for BLE1M and f_RF-2MHz for BLE2M Is this correct?

ex) If I set 2440Mhz, the LO leakage frequency is 2439Mhz?

RE: nRF52 LO leakage

Priyanka — Tue, 30 Jul 2024 07:25:19 GMT

Hi,
Please note that expected power level on the LO leakage is very low, around -90 to -100 dBm, maybe? So to measure this you need to reduce input attenuation of the spectrum analyzer to 0 dB and also set RBW to a low value to see the power above the noise level. Hope this helps.

-Priyanka

RE: nRF52 LO leakage

JK5 — Sun, 28 Jul 2024 22:41:55 GMT

When can you let me know?

RE: nRF52 LO leakage

Priyanka — Thu, 25 Jul 2024 06:35:06 GMT

I have alerted this internally and will get back to you.

-Priyanka

RE: nRF52 LO leakage

JK5 — Wed, 24 Jul 2024 22:36:54 GMT

I'm using the example file radio_test.

You mean set "Start RX carrier" and set the channel to 40 (2440Mhz) and the data rate to 1Mbit.

Then the LO leakge is 2439Mhz?

I've tried this and I can't measure LO leakage at all.

RE: nRF52 LO leakage

Priyanka — Wed, 24 Jul 2024 07:16:41 GMT

Hi,

If you want to measure / look for LO leakage on nRF52 series you need to measure at f_RF-1MHz for BLE1M and f_RF-2MHz for BLE2M

-Priyanka

RE: nRF52 LO leakage

JK5 — Tue, 23 Jul 2024 22:13:42 GMT

I'm using nRF52810 and I'll give you the marking code.
"
N52810
QFAAD0
2412AJ
"
I couldn't find any LO leakage frequency for the nRF52 no matter how much I searched.
Please give me an answer as soon as possible.

RE: nRF52 LO leakage

Priyanka — Tue, 23 Jul 2024 07:51:29 GMT

Hi,

I am discussing this internally with a few experts and will get back to you as soon as we get a solid conclusion.

Regards,

Priyanka