Waveform Computation - YOKOGAWA DL7440 User Manual

2.5

Waveform Computation

Addition, Subtraction, and Multiplication <For the setup procedure, see section 9.2>
Binary Computation <For the setup procedure, see section 9.3>
Inversion <For the setup procedure, see section 9.4>
Differentiation and Integration <For the setup procedure, see section 9.5>
Phase Shift <For the setup procedure, see section 9.8>
Scaling the Computed Waveform <For the setup procedure, see section 9.2>
IM 701450-01E
Addition, subtraction, and multiplication can be performed between waveforms of CH1
and CH1 to CH4; CH2 and CH1 to CH4; CH3 and CH1 to CH4 or Math1; and CH4 and
CH1 to CH4 or Math1. The computed result becomes the Math1 or Math2 waveform
(computed waveform). Addition (+) and subtraction (–) are useful functions when
comparing waveforms against a standard signal, checking the signal logic, or comparing
the phase. Multiplication (×) is a useful function when applying a voltage signal and a
current signal and checking the power waveform.
The selected waveform can be converted to a digital waveform of 0s and 1s with respect
to the specified threshold level. This computation can be performed on the waveforms of
CH1 to CH4 and Math1.
Waveforms can be displayed with the vertical axis inverted by multiplying the measured
waveform data by –1. This computation can be performed on the waveforms of CH1 to
CH4 and Math1.
Differentiates or integrates the waveform of the selected channel. This computation can
be performed on the waveforms of CH1 to CH4 and Math1.
The phase of the waveform of CH1 to CH4 on the DL7440 and CH1 to CH8 on the
DL7480 can be shifted and displayed. The phase shifted waveform is used in the
computation (computed waveform).
Normally, auto scaling is performed when computed waveforms are displayed.
However, you can also select manual scaling. When auto scaling is used, the vertical
1
center line level and sensitivity
the computed waveform, and the computed waveform is displayed. When manual
scaling is used, you can set the center and sensitivity as necessary.
1 Voltage in the case of voltage waveforms.
2 Voltage per division in the case of voltage waveforms.
2
of the display frame are automatically determined from
2
2-21