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Differential Probes have a significant difference in that the probe tip has two inputs,
a positive (or non-inverting) and a negative (or inverting) input and are like two
probes in one. Instead of measuring a test point in relation to a ground point (like
single-ended active probes), differential probes measure the difference in voltage of
a test point in relation to another test point. The tradeoffs are that the probe is more
bulky, is more expensive than two passive probes, less dynamic range and requires
the use of an external power and control module.
23. Application Examples:
1) Basic Measurement Technique:
Period (T) = 4 divisions x1 us/div = 4 us, Frequency =1/T = 250 kHz.
V p-p = 6 divisions x 1 V/div = 6V p-p
V max = +3 divisions x 1 V/div = +3 V
V min = -3 divisions x 1 V/div = -3 V
This picture will be updated once V Min works properly in demo mode.
The frequency of a wave is the number of times per second that a waveform repeats its
shape. We cannot directly measure the frequency on the oscilloscope, but we can measure a
closely related parameter called “period”. The period of a wave is the amount of time it takes
to complete one full cycle.
As indicated in the image above, one cycle is completed in 4 horizontal grid divisions. As
indicated in the bottom right of the screen, the time/div is set to 1us, so 4 divisions equals
4us (0.000004 seconds).
Using the relationship frequency = 1/period, calculate the period of the signal to be 250000
cycles/second (or 250 kHz).
2) Simple Measurement:
To acquire and display a signal, please do the steps as follows:
Connect signal to CH1 by using probe
The oscilloscope sets the vertical, horizontal, and triggers controls at the best status
automatically if you click on Autoset. You can also adjust the controls to meet your
measurements to optimize the waveform display.
V1.0b19 2014/12/21
OPEN6022BE User Manual
Page: 42