MDO3000 Programmer Manual.pdf - 第479页

Commands Listed in Alphabetical Order Syntax MEASUrement:R EFLevel:PERCent: HIGH <NR3> MEASUrement:R EFLevel:PERCent: HIGH? Related Commands MEASUrement:REFLevel:METHod , MEASUrement:IMMed:TYPe , MEASUrement:MEAS&l…

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Commands Listed in Alphabetical Order
MEASUrement:
REFLevel:METHod
Specifies or returns the reference level units used for measurement calculations.
NOTE. this command affects the associated reference level parameter
for all MEAS
urements:IMMed and the eight periodic measurements (4 in
MDO3000). To change the parameter for individual measurements, use the
MEASUrement:MEAS<x>:REFLevel commands.
Group
Measurement
Syntax
MEASUrement:REFLevel:METHod {ABSolute|PERCent}
MEASUrement:REFLevel:METHod?
Arguments
ABSolute specifies that the reference levels are set explicitly using the
MEASUrement:REFLevel:ABSolute commands. This method is useful when
precise values are required (for example, when
designing to published interface
specifications, such as RS-232-C).
PERCent specifies that the reference levels ar
e calculated as a percent
relative to HIGH and LOW. The percentages are defined using the
MEASUrement:REFLevel:PERCent commands.
Examples
MEASUREMENT:REFLEVEL:METHODABSOLUTE specifies that explicit user-defined
values are used for the reference levels.
MEASUREMENT:REFLEVEL:METHOD? might return
:MEASUREMENT:REFLEVEL:METHOD PERCENT indicating that the reference
level units used are calculated as a percent relative to HIGH and LOW.
MEASUrement:REFLevel:PERCent:HIGH
This command specifies the percent (where 100% is equal to HIGH) used to
calculate the high reference level when MEASUrement:REFLevel:METHod is set
to Percent. This command affects the results of rise and fall measurements.
NOTE. This command affects the associated reference level parameter for all
MEASurements:IMMed and the four periodic measurements.
Group
Measurement
2-448 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Syntax
MEASUrement:R
EFLevel:PERCent:HIGH <NR3>
MEASUrement:REFLevel:PERCent: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, ranging
from 0 to 100%. The default high reference level is 90%.
Examples
MEASUREMENT:REFLEVEL:PERCENT:HIGH95 sets the high reference level to
95% of HIGH.
MEASUREMENT:REFLEVEL:PERCENT:HIGH? might return
:MEASUREMENT:REFLEVEL:PERCENT:HIGH 90 indicating that the
percentage high reference level is set to 90% of HIGH.
MEASUrement:REFLevel:PERCent:LOW
This command specifies the percent (where 100% is equal to HIGH) used to
calculate the low reference level when MEASUrement:REFLevel:METHod is set
to Percent. This command affects the results of rise and fall measurements.
NOTE. this command affects the associated reference level parameter for a ll
MEASurements:IMMed and the periodic measurements.
Group
Measurement
Syntax
MEASUrement:REFLevel:PERCent:LOW <NR3>
MEASUrement:REFLevel:PERCent:LOW?
Related Commands
MEASUrement:REFLevel:METHod,
MEASUrement:IMMed:TYPe,
MEASUrement:MEAS<x>:TYPe
Arguments
<NR3> is a floating point number that speci
fies the low reference level, ranging
from 0 to 100%. The default low reference level is 10%.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-449
Commands Listed in Alphabetical Order
Examples
MEASUREMENT:R
EFLEVEL:PERCENT:LOW 15
sets the high reference level to
15% of HIGH.
MEASUREMENT:
REFLEVEL:PERCENT:LOW?
might return
:MEASUREMENT:REFLEVEL:PERCENT:LOW 10 indicating that the
percentage high reference level is set to 10% of HIGH.
MEASUremen
t:REFLevel:PERCent:MID<x>
This command specifies the percent (where 100% is equal to HIGH) that is
used to calculate a mid reference level. There are two mid reference levels;
thus, MID
<x> can be either MID1 or MID2. This command applies when the
command MEASUrement:REFLevel:METHod has been set to Percent. This
command is equivalent to setting the Reference Levels in the MEASURE menu
on the oscilloscope front panel.
NOTE. This command affects the re sults of period, frequency, delay, a nd all cyclic
measurements. This command affects the associated reference level parameter for
all MEA
Surements:IMMed and the four periodic measurements.
Group
Measurement
Syntax
MEASUrement:REFLevel:PER
Cent:MID<x> <NR3>
MEASUrement:REFLevel:PERCent:MID<x>?
Related Commands
MEASUrement:REFLevel:METHod
Arguments
<NR3> is a floating point number that specifies the mid ref
erence level, ranging
from 0 to 100%. The default mid reference level is 50%.
Examples
MEASUrement:REFLevel:PERCent:MID 60 sets the MID1 reference level
to 60% of HIGH.
MEASUrement:REFLevel:PERCent:MID? might return
:MEASUREMENT:REFLEVEL:PERCENT:MID2 65 indicating that the
MID2 reference level has been set to 65% of HIGH.
MEASUrement:STATIstics (No Query Form)
Clears all of the statistics accumulated for all periodic measurement
s(MEAS1
through MEAS4).
2-450 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual