Hi all,
I am trying to accurately measure a short, 1 ns square wave (0 to 5 V) that is coming in as an input signal.
The scope I am using is rated at 500 MHz bandwidth. This translates to a period of 2 ns. For a 50% duty cycle, the ON pulse would be 1 ns, exactly what I am trying to measure.
I know the topic of measurement and signal integrity is vast and complicated, but for my intended purposes (ignoring stray capacitance / board parasitics for the moment, should my scope be able to accurately recreate the input signal? I've read literature where they say a scope's bandwidth is equal to the -3 dB low-pass filter roll-off point, or 30% error point? Does that mean that for my 2 ns square wave, at 50% duty cycle, I would have 30% error in my measurement? Is this why scope manufactures recommend the bandwidth of the scope be 3-5x greater than the signal of interest?
Thanks for the help!
I am trying to accurately measure a short, 1 ns square wave (0 to 5 V) that is coming in as an input signal.
The scope I am using is rated at 500 MHz bandwidth. This translates to a period of 2 ns. For a 50% duty cycle, the ON pulse would be 1 ns, exactly what I am trying to measure.
I know the topic of measurement and signal integrity is vast and complicated, but for my intended purposes (ignoring stray capacitance / board parasitics for the moment, should my scope be able to accurately recreate the input signal? I've read literature where they say a scope's bandwidth is equal to the -3 dB low-pass filter roll-off point, or 30% error point? Does that mean that for my 2 ns square wave, at 50% duty cycle, I would have 30% error in my measurement? Is this why scope manufactures recommend the bandwidth of the scope be 3-5x greater than the signal of interest?
Thanks for the help!