RSSI

[Radio_Man]

hi engineers

I want to know how convert the RSSI in LMS7002m which equal to (sqrt(i^2+q^2)) to dbm because i use the following formula but doesn't give the corrected value 

rssi_dbm=10*log10(rssi)-tootal_gain;

where tootal_gain=RXVGA1_gain+RXVGA2_gain+Rx_LPF_gain+LNA_gain 

note : i use  a signal generator to generate CW with known power

your help would be greatly appreciated

best regards 

radio_man

[mirabelle]

Hi radio man,

may be I'm wrong but rssi = (sqrt(i^2+q^2))  is already an amplitude.

I think you don't have to use 10*log10(rssi) but 20*log10(rssi) instead,

or don't calculate the square root and use directly the power.

Tell me if it is OK.

Best regards.

Mirabelle.