Technical data

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Agilent InfiniiVision 7000B Series Oscilloscopes

Evaluation Guide

Discovering an Infrequent Glitch

with Fast Waveform Update Rates

Capturing infrequent anomalies such as random glitches requires

oscilloscopes with extremely fast update rates. Fast update rates improve

the probability of capturing random events. This lab demonstrates capturing

a glitch that occurs approximately one time every 30,000 cycles of a digital

data stream. With up to 100,000 waveforms/sec update rate, we will be able

to view this glitch multiple times a second. Oscilloscopes with longer dead

times will have difficulty capturing and displaying this glitch.

Setup

1 Connect the demo kit’s 40-pin ribbon cable from the back of the Agilent

InfiniiVision Series oscilloscope to the 40-pin connector on the demo

board.

2 Connect channel 1 probe to the CH1 test point and ground (GND).

3 Connect channel 2 probe to the CH2 test point and ground (GND).

4 Set the rotary switch on the demo board for the Data w/ Glitch signal

(Mode #2).

5 Press [Default Setup].

6 Press [Auto Scale].

7 Change the timebase to 100 ns/div.

8 Adjust the Waveform Intensity knob

to 100% to more clearly see the

infrequent glitch on channel 1

(yellow trace).

Note that the glitch is captured

multiple times per second, thanks to Agilent’s MegaZoom technology

which minimizes dead time between acquisitions. Fast waveform update

rates can even be achieved when digital channels are turned as

demonstrated in this example.

9 To permanently capture the infrequent glitch, press [Display]; then, press

 Persist.