I was looking at the data sheet of an arbitrary waveform generator and found a plot of the frequency response of the instrument, then wondered how it was measured. I know how to measure the frequency response of a simple electrical circuit. Basically I have an oscilloscope that can perform frequency response analysis, so I connect channel 1 to the input of the circuit and channel 2 to the output, then use a sweep sin wave over a range of frequencies, then the oscilloscope handles everything else and I get a bode plot of gain and phase. However, doing the same for the waveform generator will require taking apart the casing and some internal parts to get the circuitry, which may damage the device, let alone knowing where to connect the probes.
So does anyone have a suggestion how to measure it?