I see you’ve put some thought into this.
1) The RBW calculation you gave is actually the bin size calculation. RBW is bin size * FFT window bandwidth. Typically, a window bandwidth of about 2 is required or spectrum analysis, for a 30k RBW.
2) The bin size will be as the power-of-2 math determines. Rarely a nice number.
3) We will have to drop to 16 bit amplitude data for these sweeps, typically 0.01 dB resolution.
4) The 120 us includes tune time of about 20 us.
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