23
IM 701450-61E
Explanation
The following setup is required to perform waveform computation on power analysis
parameters. Turn ON the power analysis function on the applicable channels, and turn
ON the assignment of waveform analysis parameters to computed waveforms. For the
setup procedure, see section 3 in this manual.
Note
To make correct measurements and computation, it is recommended that the difference in
the transfer time of the analyzed signals be corrected (deskewed). For the setup procedure,
see section 4 in this manual.
Turning ON/OFF the Computed Waveform Display and Computed Waveform Label
See section 9.1 in the
DL7440/DL7480 User’s Manual
. Computed waveforms are
displayed only when the computed waveform display is turned ON.
Operators
You can select the operator for Math1 and Math2. For a description of the Trend
operator, see section 8 in this manual.
Power (Instantaneous power) Z (impedance)
I
2
t (Joule integral)
PS (power spectrum)
Harmonics
Waveform to Be Computed
The waveforms on which computation can be performed (source) are as follows:
Computation Name
Operator
Source (Source1:Source2)
Math1
Power
(CH1:CH2)
(CH5:CH6)
Z
(CH1:CH2)
(CH5:CH6)
I
2
t
CH2, CH6
PS
CH1 to CH6
Harmonics
CH2, CH4, CH6
Math2
Power
(CH3:CH4)
(CH5:CH6)
Z
(CH3:CH4)
(CH5:CH6)
I
2
t
CH4, CH6
PS
CH1 to CH6
Harmonics
CH2, CH4, CH6
•
On the menu, CH1 to CH8 may be indicated as C1 to C8, Math1 as M1, and Math2 as M2.
•
CH5 to CH8 can only be used on the DL7480.
Scaling
See section 9.2 in the
DL7440/DL7480 User’s Manual
.
Unit of Computed Waveforms
Units can be assigned to computed waveforms Math1 and Math2 using up to 4
characters. However, units are fixed on some operators.
• The type of characters that can be used are those displayed on the keyboard.
• The specified unit is displayed when scaled values are displayed (section 8.8 in the
DL7440/DL7480 User’s Manual
).
Smoothing
See section 9.2 in the
DL7440/DL7480 User’s Manual
.
Effects of Linear Scaling
If linear scaling is performed on the channel to be computed on waveform computation
other than operator PS, computation is performed using linearly scaled values.
7 Performing Waveform Computation on Power Analysis Parameters
