RSSI Value

i’m working on to calculate RSSI value via software. I’m using various
which give me the same result, but it depends on decimation value. The
behaviour is not linear changing decimation factor:
decimator RSSI
28 220.18217468
30 354.19775391
32 562.27972412 *
34 3.6457119 *
36 5.1297369

62 225.86129761
64 282.75350952 *
66 1.99166834 *
68 2.27621746

128 141.76763916 *
130 1.34817326 *

there is a relationship but i don’t understand. Could Someone explain
From Gnuradio discussions I noticed that RSSI value can read from output
ADCs by means of method “u.read_aux_adc(1,0)”, but where has this value
calculated using RFX2400 / FLEX900 (on board)? I don’t find it on
Is there a method to calculated RSSI on FPGA before DDC and Decimation

Thank you very much.

Giuseppe Pilla

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