Oscilloscope Bandwidth And Sample Rate; Figure 27 Alaising - Agilent Technologies 3000 Series User's And Service Manual

Capturing Data 3
Figure 27 Alaising

Oscilloscope Bandwidth and Sample Rate

An oscilloscope's bandwidth is typically described as the lowest frequency
at which input signal sine waves are attenuated by 3 dB (- 30% amplitude
error).
At the oscilloscope bandwidth, sampling theory says the required sample
rate is f = 2f . However, the theory assumes there are no frequency
S BW
components above f (f in this case) and it requires a system with
MAX BW
an ideal brick- wall frequency response.
Agilent 3000 Series Oscilloscopes User's Guide 63