In Spice, it is very simple to examine filters in the frequency domain / gain . You divide the output voltage by the input voltage and examine it in ac sweep.
in ex. If you can divide the diff ended output into the single ended input.
There is no difference between the output differential and the input single ending, the logic is the same.
Let's try this in the real world and examine it in the frequency/gain domain and draw bode plots.
I would like to know to what extent I can do this, especially with the devices I have.
VNA: I know I can draw bode plots of passive filters. Port0 applies a signal at a different frequency to the input while port1 shows how much the signal comes in.
I am not sure if active filters can be measured with VNA (especially if the gain is greater than 0db, is it a problem?) When examining passive rlc components and PCB traces (there is no power no voltage thing), we generally examine 0 db and below.
The VNA I have: cheap Nano VNA
Yes(need but need a attentuator)
Spectrum analyzer:
I am not sure if a single-input RF input Spectrum analyzer can produce a bode plot. It needs a signal generator that sweeps the input frequency and also shifts the frequency synchronously
No for single spectrum analzyer
Spectrum analyzers with gen out: (tracking generator output?) I have seen that some models can produce bode diagrams of active and passive filters.
The VNA I have: cheap Tinysa ultra (I do not know if bode diagrams can be produced with this)
(no with tinysa ) but can maximum hold mode
Oscilloscopes with bode plot/potter diagram feature:
I have an oscilloscope with this feature and I can produce bode diagrams of active and passive filters. One of the channels has the signal output feature and the second channel makes the measurement.
Oscilloscope and manual measurement: I have seen applying signals at certain intervals in the time domain, noting their amplitudes and producing a bode plot in excel (I also tried it myself)
Analog discovery 3: I bought an analog discovery3 with fft and many features. I am not that knowledgeable.
network analyzer mode
I don't know if I can do these with the devices I have, VNA, SA, and Analog Discovery 3. If possible, can you provide sample documentation?