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How to calculate channel power base on TX spectrum measure from SA

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arr_baobao

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Hi all,

can i know how to calculate(estimate) channel power base on the tx spectrum measure by spectrum analyzer below, without using the channel power measure feature in the SA. Just curious.

The center frequency is 2.484Ghz, spectrum bandwidth is 6MHz, and based on the marker the power measure at the particular points in the spectrum are around -20dbm. Can i calculate or estimate the tx channel power with this limited information?
thanks!
2.4GHz.JPG
 

First calculate:
Delta_dB = (10*LOG(Channel_BW)) - (10*LOG(SA_RBW))
Delta_dB = (10*LOG(6000000)) - (10*LOG(100000)) = 17.7dB

and then calculate:
Power_dBm = Delta_dB - SA_Measured_Power(dBm)
Power_dBm = 17.7 - (-19.9) = -2.1dBm
 
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