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Reply To: Why Rxlev in -dBm

#59359
Pix
Guest

Hi all,

RxLev is a measurement of absolute power.

If RxLev = 0 dBm it means the received level is 1mW
if Rxlev = -3dBm –> 0.5mW
RxLev = -6dBm –> 0.25mW
RxLev = -9dBm –> 0.125 mW
-12dBm –> 0.0625 mW

and so on.

a MS has a measurement range from -47dBm to -110dBm.
-47dBm : high received power
-110dBm : low received power

but the MS can hear stronger than -47dBm, it just can’t report a measurement higher than -47dBm.

RSSI is a coded value representing the RxLev. It is very simple :
-110dBm –> RSSI = 0
-109dBm –> RSSI = 1
-100dBm –> RSSI = 10
-90dBm –> RSSI = 20
-80dBm –> RSSI = 30

Cheers,
Pix