Agilent Technologies 1670G User Manual

Using the Oscilloscope

Automatic measurements display

The large field in the middle row of the menu is called the automatic 
measurements display. This display shows the nine automatic 
measurements and their values. 

"Automatic Measurement Algorithms" on page 191 for an explanation 
of each of these fields.

Measurements typically should be made at the fastest possible sweep 
speed in order to obtain the most accurate measurement possible. You 
can only make automatic measurements with data that is currently 
being displayed in the waveform display area. Keep the following in 
mind when making measurements:

•

At least one full cycle of the waveform, with at least two like edges, must 
be displayed for Period and Freq measurements.

•

A complete positive pulse must be displayed to make a +Width 
measurement.

•

A complete negative pulse must be displayed to make a -Width 
measurement.

•

The leading (rising) edge of the waveform must be displayed for Risetime, 
and rising edge Preshoot and Overshoot measurements.

•

The trailing (falling) edge of the waveform must be displayed for Falltime, 
and falling edge Preshoot and Overshoot measurements.

•

Risetime, Falltime, Preshoot, and Overshoot measurements will be more 
accurate if you expand the edge of the waveform by selecting a faster 
sweep speed.

•

If the signal is clipped, the automatic measurements cannot be made.