Vertical cursors measure from the trigger point
Remember that each vertical cursor measures the time from the trigger point to itself. This relationship is shown in the next
figure.
A vertical cursor readout includes and varies directly with the Delay time, which varies directly with the horizontal position set for
the time base. To see the amount of time to the first point, set horizontal delay to 0.0 and set the horizontal reference point to 0%.
Now the horizontal position readout shows the time following the first point, and adding this value to the cursor readout yields the
cursor position on screen relative to first point. (You can find the horizontal readout both in the control window and in the readout
at the bottom of the screen.)
The following relationships hold:
Time from First Point = Horiz Position (when Horiz Delay and Ref Position are zero)
T1 readout = Time to First Point + Additional Time to Cursor
Cursor units depend on sources
A cursor that measures amplitude or time will read out in the units of its source as indicated in the table below. Mixed sources
require delta cursor readouts to use the units of the Cursor 1 source.
Cursors Standard units
1
Readout names
Horizontal volts, watts, IRE V1, V2, ΔV
Vertical seconds, bits, Hertz T1, T2, ΔT, ΔF
Waveform, Screen volts, watts, seconds, bits, Hertz V1, V2, ΔV, T1, T2, ΔT
1
If the V1 and V2 units do not match, the ΔV readout defaults to the units used by the V1 readout.
Cursor setups
DPO70000SX, MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO5000B Series 95
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