17-1
IM DLM3054-01EN
17 Power Supply Analysis Feature (Power Analysis
and Power Measurement, Option)
Overview of the Power Supply Analysis Feature
The power supply analysis feature consists of analysis features such as switching loss analysis and power
measurement features for voltage, current, and power. The power supply analysis option is only available on
4-channel models.
Power Analysis (Power Analysis)
Type (Type)
Select the power supply analysis type from one of the settings below.
• OFF: Disables power supply analysis
•
: Switching loss analysis
•
: Safe operating area analysis
•
•
: Joule integral
Power Measurement (Power Measurement)
Power of up to two circuits (Power Measurement1 and Power Measurement2) can be measured simultaneously.
For details, see “
Power Measurement (Power Measurement)
,” provided later.
Deskewing the Transfer Time Difference between Analysis Source Signals
To correctly measure power supply analysis items from the voltage and current, you must apply the voltage and
current signals to the instrument’s signal input terminals with no transfer time difference between the signals.
However, transfer time difference may occur between the two signals depending on the probe that you are
using. The instrument allows you to automatically or manually deskew the transfer time difference between the
two signals and then measure analysis items and power measurement items. To use this feature, you need to
connect a deskew signal source along with the probe beforehand.
We recommend that you use the following YOKOGAWA products when you deskew the signals.
Deskew signal source
701936
Passive probe
701937
Differential probe
700924, 701921, 701926, 701927
Current probe
701928, 701929, 701930, 701931, 701932, 701933
Notes about Auto Deskewing
• Use the 701936 as the deskew signal source.
• Use a current probe whose attenuation is 10 A:1 V. When you use the 701936 deskew signal source, you can
also use current probes whose attenuation is 100 A:1 V.
• There is a unique interval between the voltage and current output waveforms of the 701936 deskew signal
source. This interval is a result of the electrical length and impedance of the signal output section. Because
in auto deskew the unique value is corrected automatically, after auto deskew is performed, the voltage and
current waveform values are off by the amount of the unique value. For information about the unique value
and about manual skew correction, see the 701936 deskew signal source user’s manual.
You need power supplies to use the deskew signal source and current and differential probes without the
YOKOGAWA probe interface (differential probes can run on batteries). If the instrument is not equipped with
the probe power option (/P4), you need to use the probe power supply (701934), which is sold separately.