Hioki 8847 - Waveform Calculation Example

10.6 Numerical Calculation Type and Description
187
Chapter 10 Numerical Calculation Functions
10
Time to Level
(Time-Lev)
Finds the point where the signal crosses a speci-
fied level from the start of the calculation range,
and obtains the time elapsed from the last trigger
event.
Specified Time Level
(Lev-Time)
Obtains the level at a specified time point after the
trigger event.
The time can also be specified using other calcu-
lation results obtained earlier.
Pulse Width
Obtains pulse width as the time difference be-
tween one rising or falling intersection of the wave-
form through a specified level to the next
intersection (with opposite slope).
Duty Ratio (%)
Obtains the duty percentage based upon the ratio
of the time from a rising intersection to the next
falling intersection at a specified level, to the time
from the same falling intersection to the next rising
intersection at the same level.
Pulses
Obtains the count of pulses from the number of ris-
ing or falling intersections with a specified level.
One pulse is counted when the signal falls back
below the specified level after rising through it (or
vice versa)
Four Arithmetic Oper-
ations (Calculation)
Performs arithmetic operations (+, - , ×, ÷) upon arbitrarily selected results of numerical
calculations.
Time difference calcu-
lation (Time Diff)
Obtain T[s], the time difference that passes be-
tween rises above or drops below the level speci-
fied for A and B waveforms.
Time difference T = B waveform (time where the
level was exceeded) - A waveform (time where the
level was exceeded).
Phase contrast calcu-
lation (Phase Diff)
Obtain the time difference that passes between
rises above or drops below the level specified for
A and B waveforms and then obtain the phase
contrast [°], based on A waveform.
High Level
Low Level
With 0% of the loaded waveform data as the Low
level and 100% as the High level, a histogram (fre-
quency distribution) is used for calculation.
Numerical Calculation
Type
Description
Level
0 V
T
Level
0 V
T
T (Time)
Level
Level
T
u-d
T
d-u
Duty (%) =
X 100 (%)
Tu-d
Tu-d + Td-u
T
u-d
: Time (seconds) after rising intersection to
falling intersection
T
d-u
: (s) Time (seconds) after falling intersection
to the next rising intersection
Level
0
123
Level
T
AB
Level
T
AB
Phase contrast=
× 360°
Cycle of A waveform
Time difference of A and B waveform [T]
0%
100%
Low
Level
High
Level
Data number