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Frequency Response & Sampling Rate For an analog instrument designed to measure changing input signals, a key parameter is frequency response, or bandpass, stated in hertz (Hz). That is a direct indication of how rapidly the input signal can change, while still being properly amplified and conditioned by the instrument. For a digital instrument used in the same application, the key parameter is the sampling rate, which is the number of samples that can be acquired in a specified period of time, typically one second. Sampling rate is sometimes specified in terms of frequency response (Hz), but while the two are related , they are not the same, and should not be used interchangeably.

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