MDO3000 Programmer Manual.pdf - 第239页

Commands Listed in Alphabetical Order Examples BUS:UPPerthre shold:REF2 TTL sets the upper threshold for reference waveform 2 to 1.4000. BUS:UPPerthre shold:REF3? might return 0.0E+0, which is the default. BUSY? (Query O…

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Commands Listed in Alphabetical Order
Group
Bus
Syntax
BUS:UPPerthreshold{:MATH|:MATH1} {<NR3>|ECL|TTL}
BUS:UPPerthreshold{:MATH|:MATH1}?
Related Commands
BUS:LOWerthreshold{:MATH|:MATH1}
Arguments
<NR3> is a floating point number that specifies the upper threshold of the math
waveform, in volts.
ECL – ECL (-1.3 volts). Note that this setting is constrained, depending upon the
vertical scale for the specified math waveform.
TTL – TTL (1.4 volts). Note that this setting is constrained, depending upon the
vertical scale for the specified math waveform.
Examples
BUS:UPPerhreshold:MATH TTL sets the upper threshold for the math
waveform to 1.4000 volts.
BUS:UPPerhreshold:MATH? might return 0.0E+0, which is the default.
BUS:UPPerthreshold:REF<x>
This command sets the upper threshold for each reference waveform. This applies
to all search and trigger types that use that reference waveform.
Group
Bus
Syntax
BUS:UPPerthreshold:REF<x> {<NR3>|ECL|TTL}
BUS:UPPerthreshold:REF<x>?
Related Commands
BUS:LOWerthreshold:REF<x>
Arguments
<NR3> is a floating point number that specifies the upper threshold for the
reference waveform, in volts.
ECL — ECL (-1.3 volts). Note that this setting is constrained, depending upon the
vertical scale for the specified reference waveform.
TTL — TTL (1.4 volts). Note that this setting is constrained, depending upon the
vertical scale for the specified reference waveform.
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Commands Listed in Alphabetical Order
Examples
BUS:UPPerthre
shold:REF2 TTL
sets the upper threshold for reference
waveform 2 to 1.4000.
BUS:UPPerthreshold:REF3? might return 0.0E+0, which is the default.
BUSY? (Query Only)
Returns the status of the oscilloscope. This command allows you to synchronize
the operation of the oscilloscope with your application program. (See page3-7,
Synchronization Methods.)
Certain oscilloscope operations can affect the
BUSY? response. (See Table 3-3
on page 3-8.)
Group
Status and Error
Syntax
BUSY?
Related Commands
*OPT?, *WAI
Returns
<NR1> = 0 means the oscilloscope is not busy processing a command whose
execution time is extensive.
<NR1> = 1 means the oscilloscope is busy processing a command whose execution
time is extensive. (See Table 3-3 on page 3-8.)
Examples
BUSY? might return :BUSY 1 indicating that the oscilloscope is currently busy.
*CAL? (Query Only)
Performs an internal self-calibration and returns the oscilloscope calibration status.
NOTE. Disconnect or otherwise remove all input signals prior to starting
self-calibration. The self-calibration can take several minutes to complete .
Group
Calibration and Diagnostic
Syntax
*CAL?
Returns
<NR1> = 1 indicates the calibration did not complete successfully.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-209
Commands Listed in Alphabetical Order
<NR1> = 0 indica
tes the calibration completed without errors.
Examples
*CAL? starts the internal signal path calibration and might return 0 to indicate that
the calibration was successful.
CALibrate:FACtory:STATus? (Query Only)
Returns the factory calibration status value saved in nonvolatile memory.
Group
Calibra
tion and Diagnostic
Syntax
CALibrate:FACtory:STATus?
Examp
les
CAL:FAC:STAT? might return CALIBRATE:FACTORY:STATUS PASS indicating
that factory calibration passed.
CALibrate:FACtory:STATus:AFG? (Query Only)
Thi
s query returns the factory calibration status for the Arbitrary Function
Generator portion of the instrument, if present.
Th
is query is synonymous with CALibrate:RESults:FACtory:AFG?
Group
Calibration and Diagnostic
Syntax
CALibrate:FACtory:STATus:AFG?
Related Commands
CALibrate:FACtory:STATus:SCOPE?, CALibrate:FACtory:STATus:RF?
Returns
PASS - factory calibration has passed
INIT - factory calibration is unadjusted
RUNNING - factory calibration is running
Examples
CALIBRATE:FACTORY:STATUS:AFG? might return RUNNING, indicating that the
factory calibration for the AFG portion of the instrument is in progress.
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