Add Or Subtract - Agilent Technologies 7000B Series User Manual

Add or Subtract

When you select add or subtract, the Source 1 and Source 2 channel voltage
values are added or subtracted point by point, and the result is displayed.
You can use subtract to make a differential measurement or to compare
two waveforms. If your waveforms' DC offsets are larger than the dynamic
range of the oscilloscope's input channels you will need to use a
differential probe instead.
Example: Subtract channel 2 from channel 1
InfiniiVision 7000B Series Oscilloscopes User's Guide
Scale — lets you set your own vertical scale factors for subtract,
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expressed as V/div (Volts/division) or A/div (Amps/division). Press
the Scale softkey, then turn the Entry knob to rescale. Units are set
in the channel Probe Menu.
Offset — lets you set your own offset for the math function. The offset
•
value is in Volts or Amps and is represented by the center horizontal
grid line of the display. Press the Offset softkey, then turn the Entry
knob to change the offset of the math waveform.
A scale unit of U (undefined) will be displayed for scale and offset if
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the two source channels are set to dissimilar units. Units are set
using the channel's Probe Units softkey.
Measurements and Math Functions 5
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