I have a nice clean sinus 133Khz showing 2.23 Vrms in scope mode
In spectrum mode when scale is set to dBV it meassures 6.86 dBV (2.2Vrms). If i set it to arbitrary (1 dBuv) i read 123.9 dBuv (1.56 Vrms).
Why do i see this difference.
Range +- 20V: 8,8 dbV
Range +- 10V: 8,8 dbV
Range +- 5V: 8,8 dbV
Range +- 2V: 7,1 dbV ????
Arbitrary 1uV
Range +- 20V: 126 dbuV
Range +- 10V: 126 dbuV
Range +- 5V: 126 dbuV
Range +- 2V: 124 dbuV ????
Range +- 1V: 118 dbuV ????
I can see it's because we're out of range but nothing tells me that. In scope mode the signal just passes the display but in spectrum mode the signal seems ok, it is still within the display, just reduced. I know it is up to the user but some kind of overload indication would be nice.