(Please visit the site to view this file)Hi Jim, Thanks for looking into this. Looking at your results, I see : analysis windows samples =65536 RBW = 48828 Hz tone freq = 997.77 MHz window = blackman For analysis I am using analysis windows samples =65536 RBW = 48828 Hz tone freq = 997 MHz window = kaiser -Are you choosing the tone freq to fall on a bin? -I am guessing you are storing samples, and post analyze the data. what type of processing are you using to arrive at SNR? I am attaching my adc data ( ascii format), setting, spectrum plot and it is 81920 points long, and you can choose 65536 points for analysis. the background cal related setting is set manually after temperature stablizes, where I mute the input, cal the offset, then disable the offset, and run in bg cal. Thank, Shervin (Please visit the site to view this file)
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