Hi. Using the spectrum analyzer software I’m trying to measure a signal from my signal generator and it seems as if the measured value is attenuated. Or am I doing something wrong?
This is what I did:
Signal generator, sine wave 7 MHz with varying amplitude (10mV – 1V) connected to the RSP1A. By this I mean that I set the signal generator to several different amplitude settings.
What I see: nice peak at 7 MHz (great!) but the dBm value is off about 7 dBm (lower).
I calculated the expected value using the peak-to-peak measurement on my oscilloscope: log10 ((Vpp squared) * 1000) / 400) * 10
I double checked my expected values with various on-line calculators / tables.
Do I miss something here? Is there any attenuation I have to take into account?