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how to convert ADC reading to dB

Question asked by flea333 on Aug 26, 2016
Latest reply on Sep 6, 2016 by Vinod

Hi - we're using the AD9361 transceiver and want to calibrate our system so we know the end to end gain the chip reads from our RF SMA connector inputs since we have several gain stages up front. What is the ideal way to calculate the RF signal power for a CW input we are using to calibrate and turn that voltage reading into a dB value. It seems some of our engineers disagree one which bins to use and how to convert the measured voltage into RF dBm reading. We appear to be using 50 ohm load assumption for converting from ADC voltage value to dB reading. 

 

Thanks

Leland

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