MDO3000 Programmer Manual.pdf - 第565页
Commands Listed in Alphabetical Order Group Power Syntax POWer:SWLoss: VCEsat <NR3> POWer:SWLoss: VCEsat? Arguments <NR3> is a floating point number that specifies the VCEsat switching loss calculation. Example…
Commands Listed in Alphabetical Order
POWer:SWLoss
:TOTal:POWer:MEAN? (Query Only)
Returns the mean total power loss.
Conditions
This command requires a DPO4PWR application module for 4000 series models,
or an MDO3PWR application module for MDO3000 series models.
Group
Power
Syntax
POWer:SWLoss:TOTal:POWer:MEAN?
Examples
POWER:SWLOSS:TOTAL:POWER:MEAN? might return
:POWER:SWLOSS:TOTAL:POWER:MEAN 1 indicating that the mean total power
switching loss calculation is set to 1 W.
POWer:SWLoss:TO Tal:POWer:MIN? (Query Only)
Returns the minimum total power loss.
Conditions
This command requires a DPO4PWR application module for 4000 series models,
or an MDO3PWR application module for MDO3000 series models.
Group
Power
Syntax
POWer:SWLoss:TOTal:POWer:MIN?
Examples
POWER:SWLOSS:TOTAL:POWER:MIN? might return
:POWER:SWLOSS:TOTAL:POWER:MIN 1 indicating that the minimum total
power switching loss calculation is set to 1 W.
POWer:SWLoss:VCEsat
This command specifies VCESAT value for use in switching loss calculations
when the conduction calculation method is VCESAT.
Conditions
This command requires a DPO4PWR application module for 4000 series models,
or an MDO3PWR application module for MDO3000 series models.
2-534 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Group
Power
Syntax
POWer:SWLoss:VCEsat <NR3>
POWer:SWLoss:VCEsat?
Arguments
<NR3> is a floating point number that specifies the VCEsat switching loss
calculation.
Examples
POWER:SWLOSS:VCESAT 5 sets the VCEsat value to 5.0000.
POWER:SWLOSS:VCESAT ? might return :P OWER:SWLOSS:VCEsat 2.0000
indicating that the VCEsat value is set to 2.0000.
POWer:TYPe
This command specifies the power application measurement type.
Conditions
This command requires a DPO4PWR application module for 4000 series models,
or an M
DO3PWR application module for MDO3000 series models.
Group
Power
Syntax
POWer:TYPe {NONe|QUALit y|SWITCHingloss|SOA
|HARMonics|RIPPle|MODULationanalysis|DESKew}
POWer:TYPe?
Arguments
NONe Use to set the measurement type to None.
QUALity Use the power quality functions to obtain measurements and statistics
about the general power quality in your test circuit
SWITCHingloss Use the switching loss functions to obtain the power loss and
energy loss across the acquired waveform, including turn-on loss, turn-off loss,
conduction loss, and total loss. Typically, use these functions to characterize
losses in power supply switching devices, as they switch on and off.
SOA Use the safe operating functions to obtain an X-Y display of the switching
device-under-test's voltage and current. Also use them to perform a mask test of
the X-Y signal relative to the graphical X-Y description of the device specification
table. The safe operating area is typically the voltage and current values that a
semiconductor can operate without damaging itself.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-535
Commands Listed in Alphabetical Order
HARMonics Use t
he harmonics functions to obtain the frequency spectrum of the
source waveform and associated measurement values. Harmonic measurements
can help one perform in-depth troubleshooting of power quality problems.
RIPPle Use the ripple functions to obtain measurements and statistics for the
AC components of the acquired waveform. Ripples are often found on top of a
large DC signal.
MODULationanalysis Use the modulation functions to obtain a trend plot of a
measurement value across the acquired waveform. This is useful for showingthe
variations in the modulated switching signal.
DESKew Run the deskew procedure to match the delays through the probes.
Different probes introduce different delays between the probe tip and the
oscilloscope. Many oscilloscope users do not have to worry about this because
they use
the same type of probe on all channels. Power measurement users,
however, frequently use both a voltage probe and a current probe. A current
probe typically has a larger delay than a voltage probe, so setting deskew values
becomes important.
Examples
POWER:TYPE HARMonics sets the measurement type to Harmonics.
POWER:TYPE? might return POWER:T YPE NON indicating that no measurement
type is set.
POWer:VOLTAGESOurce
This command specifies the voltage source for the power application.
Conditions
This command requires a DPO4PWR application module for 4000 series models,
or an MDO3PWR application module for MDO3000 series models.
Group
Power
Syntax
POWer:VOLTAGESOurce {CH1|CH2|CH3|CH4|REF1|REF2|REF3|REF4}
POWer:VOLTAGESOurce?
Arguments
CH1–CH4 or REF1–REF4 sets the analog channel 1–4 or reference waveform
1–4 as the voltage source.
Examples
POWER:VOLTAGESOURCE CH1 sets the voltage source as CH1.
POWER:VOLTAGESOURCE? might return POWER:VOLTAGESOURCE CH1 indicating
that the voltage source is set to CH1.
2-536 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual