user 37518
Well-known member
Hi everyone, I wish to measure noise voltage and noise current density, specially on transistors and DOA's, how can this be performed?
Also, I would like to know the noise figure for different source impedances, from the definition of noise figure, it is calculated as SNR at the input divided by SNR at the output, so my idea is to have a low source impedance connected to a resistor substitution box, and change the source impedance whilst measuring SNR at the input and at the output and then just plot the results. I have both an AP Sys 1 and an HP8903A.
Also, I would like to know the noise figure for different source impedances, from the definition of noise figure, it is calculated as SNR at the input divided by SNR at the output, so my idea is to have a low source impedance connected to a resistor substitution box, and change the source impedance whilst measuring SNR at the input and at the output and then just plot the results. I have both an AP Sys 1 and an HP8903A.