MDO3000 Programmer Manual.pdf - 第476页

Commands Listed in A lphabetical Order NOTE. this comm and affects the associated r efer ence level parameter for all MEASur ements:IMMed and the four periodic measur ements. Group Measuremen t Syntax MEASUrement:R EFLev…

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Commands Listed in Alphabetical Order
Syntax
MEASUrement:M
ETHod {Aut o|HIStogram|MINMax}
MEASUrement:METHod?
Related Commands
MEASUrement:REFLevel:PERCent:HIGH,
MEASUrement:REFLevel:PERCent:LOW,
MEASUrement:REFLevel:PERCent:MID<x>,
Arguments
Auto selects the best method for each data set.
HIStogram sets the high and low waveform levels statistically using a histogram
algorithm.
MINMax uses the highest and lowest values of the waveform record. This selection
is best for examining waveforms with no large, flat portions of a common value
,
such as sine waves and triangle waves.
Examples
MEASUREMENT:METHOD? might return :MEASUREMENT: METHOD MINMAX
indicating that the reference levels are set to MIN and MAX.
MEASUrement:REFLevel? (Query Only)
Returns the current reference level parameters.
Group
Measurement
Syntax
MEASUrement:REFLevel?
Examples
MEASUREMENT:REFLEVEL? might return these reference
level settings
:MEASUREMENT:REFLEVEL:METHOD
PERCENT;ABSOLUTE:HIGH 0.0000;LOW 0. 0000;MID1 0.0000 ;MID2
0.0000;:MEASUREMENT:REFLEVEL:PERCENT:HIGH 90.0000;LOW
10.0000;MID1 50.0000 ;MID2 50.0000
MEASUrement:REFLevel:ABSolute:HIGH
This command specifies the high reference level, and is the upper reference level
when MEASUrement:REFLevel:METHod is set to Absolute. This command
affects the results of rise and fall measurements.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-445
Commands Listed in Alphabetical Order
NOTE. this comm
and affects the associated reference level parameter for all
MEASurements:IMMed and the four periodic measurements.
Group
Measurement
Syntax
MEASUrement:REFLevel:ABSolute:HIGH <NR3>
MEASUrement:REFLevel:ABSolute:HIGH?
Related Commands
MEASUrement:REFLevel:METHod,
MEASUrement:IMMed:TYPe,
MEASUrement:MEAS<x>:TYPe
Arguments
<NR3> is a floating point number that specifies the high reference level, in volts.
The default is 0.0 V.
Examples
MEASUREMENT:REFLEVEL:ABSOLUTE:HIGH 1.71 sets the high reference level
to 1.71 V.
MEASUREMENT:REFLEVEL:ABSOLUTE:HIGH? might return
:MEASUREMENT:REFLEVEL:ABSOLUTE:HIGH 1.7100E+00 indicating that the
absolute high reference level is set to 1.71 V.
MEASUrement:REFLevel:ABSolute:LOW
This command specifies the low reference level, and is the lower reference level
when MEASUrement:REFLevel:METHod is set to Absolute.
NOTE. this command affects the associated reference level parameter for all
MEASurements:IMMed and the four periodic measurements.
Group
Measurement
Syntax
MEASUrement:REFLevel:ABSolute:LOW <NR3>
MEASUrement:REFLevel:ABSolute:LOW?
Related Commands
MEASUrement:REFLevel:METHod,
MEASUrement:IMMed:TYPe,
MEASUrement:MEAS<x>:TYPe
2-446 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Arguments
<NR3> is a floati
ng point number that specifies the low reference level, in volts.
The default is 0.0 V.
Examples
MEASUREMENT:REFLEVEL:ABSOLUTE:LOW 0.0 sets the low reference level
to 0.0 V.
MEASUREMENT:REFLEVEL:ABSOLUTE:LOW? might return
:MEASUREMENT:REFLEVEL:ABSOLUTE:LOW 0.0000E+00 indicating
that the absolute low reference level is set to 0.0 V.
MEASUrement:REFLevel:ABSolute:MID<x>
This command specifies an absolute mid reference level (the 50% reference level)
for the "to" waveform when taking a delay measurement, in volts. There are
two absolute mid reference levels; thus MID<x> can either be MID1 or MID2.
This command applies when MEASUrement:REFLevel:METHod has been set
to Absolute. This command is equivalent to setting the Reference Levels in the
MEASURE menu on the oscilloscope front panel.
NOTE. This command affects the results of period, frequency, delay, and all cyclic
measurements. This command affects the associated reference level parameter for
all MEASurements:IMMed and the four periodic measurements.
Group
Measurement
Syntax
MEASUrement:REFLevel:ABSolute:MID<x> <NR3>
MEASUrement:REFLevel:ABSolute:MID<x>?
Related Commands
MEASUrement:REFLevel:METHod
Arguments
<NR3> is a floating point number that specifies the mid reference level in volts.
Examples
MEASUrement:REFLevel:ABSolute:MID 0.5 sets the absolute MID1
reference level for the delay waveform to 0.5 V.
MEASUrement:REFLevel:ABSolute:MID? might return
:MEASUREMENT:REFLEVEL:ABSOLUTE:MID2 0.5000E+00 indicating that the
absolute MID2 reference level is set to 0.5 V.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-447