useful rssi range in nRF51822

[wiz_yoo]

Dear nordic.

We are developing nRF51822 with S120 as central. When advertising from Peripheral, RSSI value is changed it's position.

Measured RSSI range is -60 dBM to -110 dBM and in some cases, cann't receive advertising.

"RSSI accuracy" Valid range (-50 dBm to -80 dBm) is written in [nRF51822_PS_v3.2.pdf page.55]

It means that useful range is -50 ~ -80 dBm? (In this case, it means -40 dBm is not useful ?) Or is there useful range for nRF51822 as central?

Thanks. Best and regards.

[Susheel Nuguru]

I think the specification took into consideration extreme test conditions and also to generalize for both 1Mbps and 2Mbps it gave a safe number. You can still get reasonable range -35dBm - 90dBm (±6 dBm) in normal temperatures.