I just got FPC1000 spectrum analyzer that goes from 5 kHz to 1 GHz. I didn't had any spectrum analyzer experiences before this one so everything is very new to me.
Among few things that I don't understand about it is also a significant error seen at SA when measuring a signal directly from function generator.
I applied 1,05Vpp/10kHz sine wave directly to input of SA (using BNC to crocodile connector cable since I don't have the real probe yet). 1,05Vpp approximately equals 4 dBm (power unit). But SA shows me exactly -2 dBm, which equals approximately 500 mVpp (which is approximately a factor of 2 smaller than the real value)!
Even if I set output function generator impedance to 50 Ohms, SA shows me 1.8 dBm, which is 760 mVpp.
Are the probes making an error? Or am I missing something here? I cannot find the solution for this case.