Maximum Rssi value that can be received by the nRF52832 SoC in dBm

RE: Maximum Rssi value that can be received by the nRF52832 SoC in dBm

Brosnan — Mon, 12 Apr 2021 13:25:47 GMT

okay, so I'll take it as a saturation level. Thanks for your help

RE: Maximum Rssi value that can be received by the nRF52832 SoC in dBm

run_ar — Mon, 12 Apr 2021 13:11:42 GMT

The RSSI is designed to have a valid range of -90 to -20 and will saturate somewhere above that. Seems that is around -14 dBm, but it is not something we specify as it is out of range.

RE: Maximum Rssi value that can be received by the nRF52832 SoC in dBm

Brosnan — Wed, 07 Apr 2021 13:21:02 GMT

Valid range is -90 to -20 dBm, so the signal strength I see of -14dBm is not very accurate? Also i wanted to know why it saturates at -14dBm and not go above it. I feel it should go above -14dBm because i see that value at 30cm distance between transmitter and receiver and still see the same value when I touch them together

RE: Maximum Rssi value that can be received by the nRF52832 SoC in dBm

run_ar — Tue, 06 Apr 2021 08:11:07 GMT

The rssi valid range is -90 to -20 dBm. Please see Received Signal Strength Indicator (RSSI) specifications.

In addition you need to do tethered measurements to know the strength of the input signal.

RE: Maximum Rssi value that can be received by the nRF52832 SoC in dBm

awneil — Tue, 06 Apr 2021 08:09:57 GMT

[quote userid="81353" url="~/f/nordic-q-a/73578/maximum-rssi-value-that-can-be-received-by-the-nrf52832-soc-in-dbm/302999#302999"]The transmitter was transmitting at max output of 21dBm[/quote]

How do you determine that?

What are the gains of your antennas?

etc

RE: Maximum Rssi value that can be received by the nRF52832 SoC in dBm

Brosnan — Tue, 06 Apr 2021 04:11:25 GMT

Oh thanks Awneil. So the spec says it should be typically 0dBm.

We have designed a BLE module with nRF52832 + SKY66112 PA frontend. I was using 2 of these modules, one as transmitter and the other as receiver. The transmitter was transmitting at max output of 21dBm. The modules were fairly close to each other.

I checked the RSSI on the receiver and noticed that it never went above -14dBm. Is there any reasoning you can think of for this to happen?

RE: Maximum Rssi value that can be received by the nRF52832 SoC in dBm

awneil — Mon, 05 Apr 2021 16:36:58 GMT

RE: Maximum Rssi value that can be received by the nRF52832 SoC in dBm

Brosnan — Mon, 05 Apr 2021 10:38:52 GMT

Thank you for your response Awneil. But I couldn't find the maximum recieve rssi value in this list.

RE: Maximum Rssi value that can be received by the nRF52832 SoC in dBm

awneil — Mon, 05 Apr 2021 09:30:01 GMT

See the Product Specification:

infocenter.nordicsemi.com/.../radio.html