For anyone who is wondering about this, here is what I have figured out:
The FFT frequency span AND the AWG sweep function ranges are both set by the current timescale of the oscilloscope. I made the following chart during testing:
Wavegen FFT Dispay time/div Range Shown Min prod Max prod f/div f range f/point 8us/div - 000000 125000 125000 1000000 7812.5 16us/div 000000-996030 000000 125000 62500 500000 3906.25 32us/div 000000-498015 000000 125000 31250 250000 1953.125 64us/div 000000-249007 000000 125000 15625 125000 976.5625 128us/div 000000-124440 000000 62220 7777.5 62220 486.09375 256us/div 000000- 62220 000000 31110 3888.75 31110 243.046875 500us/div 000000- 31110 000000 16000 2000 16000 125 1ms/div 000000- 15937.5 000000 7968.75 996.09375 8000 62.255859375 2ms/div 000000- 7968.75 000000 4000 500 4000 31.25 5ms/div 000000- 3984.38 000000 1600 200 1600 12.5 10ms/div 000000- 1593.75 000000 800 100 800 6.25 HALF DISPLAY (4 divs only, 32 points per div) 20ms/div 000000- 1593.75 000000 800 200 800 6.25 50ms/div 000000- 796.875 000000 320 80 320 2.5 0.1s/div 000000- 318.75 000000 ?? 40 160 1.25 0.2s/div 000000- 159.375 000000 79.05 20 80 0.625 0.5s/div 000000- 79.6875 000000 31.45 8 32 0.25 1s/div 000000- 31.875 000000 15.9375 4 16 0.125 2s/div 000000- 15.9375 000000 8 5s/div 000000- 7.905 000000 3.2 10s/div 000000- 3.1875 000000 20s/div 000000- 1.53 000000 50s/div 000000- 0.765 000000
If you look at the chart in a monospace font, it looks ok
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