4.Advanced User Guidebook
42
Vtop:
Voltage of the waveform's flat top, useful for square/pulse waveforms.
Vbase:
Voltage of the waveform's flat base, useful for square/pulse waveforms.
Vamp:
Voltage between Vtop and Vbase of a waveform.
OverShoot:
Defined as (Vmax-Vtop)/Vamp, useful for square and pulse
waveforms.
PreShoot:
Defined as (Vmin-Vbase)/Vamp, useful for square and pulse
waveforms.
Cycle RMS:
The true Root Mean Square voltage over the first entire period of
the waveform.
Cursor RMS:
The true Root Mean Square voltage over the range of two cursors.
The automatic measurement of time parameters
The oscilloscopes provide time parameters auto-measurements include Period,
Frequency, Rise Time, Fall Time, +D width, -D width, +Duty, -Duty, Delay
A→B , Delay A→B , and Duty cycle.
shows a pulse with some of the time measurement points.
Figure 4-14
Rise Time:
Time that the leading edge of the first pulse in the waveform takes
to rise from 10% to 90% of its amplitude.
Fall Time:
Time that the falling edge of the first pulse in the waveform takes to
fall from 90% to 10% of its amplitude.
+D width:
The width of the first positive pulse in 50% amplitude points.
-D width:
The width of the first negative pulse in the 50% amplitude points.
+Duty:
+Duty Cycle, defined as +Width/Period.
-Duty:
-Duty Cycle, defined as -Width/Period.
Delay
A→B
:
The delay between the two channels at the rising edge.
Delay
A→B
:
The delay between the two channels at the falling edge.
Screen Duty:
Defines as (the width of the positive pulse)/(Entire period)
