How do I determine the Rise Time of my Sampling Head for my sampling scope? Only the bandwidth is specified.

Question

Accepted Answer

The gausian definition is used for the sampling scope, so the formula is: T_rise (10-90%) = 0.339 / BW.

In other words, a sampling head with a 3dB bandwidth of 30 GHz would have a rise time of 11.3 ps (for 10 to 90%).

For the 20 to 80% risetime the formula would be: T_rise (20-80%) = 0.223 / BW, which is 7.43 ps rise time.