Regarding the following text:
Dynamic Range is defined as ratio between the smallest and the largest signals that can be measured by the system.
Smallest signal is usually the RMS Noise which is the root-mean-square value of the signal measured with no applied signal. The measured RMS Noise level will depend on the bandwidth it is measured over. Each time bandwidth is doubled, recorded noise increases by 1.41 or 3dB.
For the part "Each time bandwidth is doubled"; what is meant by bandwidth here? Bandwidth of what? Do they mean the sampling frequency of the ADC?
So if our noise signal's FFT yields the noise signal's max frequency is 1kHz i.e signal bandwidth is 1kHz. And if the ADC samples this signal with 10kHz. Is the bandwidth meant in the paragraph bandwidth of the noise or the ADC sampling frequency?