| If you use a scope with a long dead time (a), you might think that you were looking at a very stable waveform. An HP 54600B with trigger hold-off simulates the long dead time. A scope with a shorter dead time, in this case, an HP 54600B without trigger hold-off (b), shows that the pulse width varies considerably. Turning on the Autostore infinite-persistence feature (c) makes the variations in the pulse width much more visible. With its glitch-trigger capabilities and high sample rate, the HP 54520A can capture a picture of the pulse train's widest pulse (d), even if the wide pulse occurs only once. |
