MDO3000 Programmer Manual.pdf - 第939页

Commands Listed in Alphabetical Order TRIGGER:A:TRA NSITION:POLARITY ? might return :TRIGGER:A: TRANSITION:PO LARITY EITHER indicating that the polarity can be either positive or negative. TRIGger:A{:TRANsition|:RISEFall…

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Commands Listed in Alphabetical Order
TRIGger:A{:T
RANsition|:RISEFall}:DELTatime
This command specifies the delta time used in calculating the transition value
for the transition trigger.
Group
Trigger
Syntax
TRIGger:A{:TRANsition|:RISEFall}:DELTatime <NR3>
TRIGger:A{:TRANsition|:RISEFall}:DELTatime?
Arguments
<NR3> is a floating point number that specifies the delta time, in seconds.
Examples
TRIGGER:A:TRANSITION:DELTATIME 15E-6 sets the delta time of the
transition trigger to 15 µs.
TRIGGER:A:TRANSITION:DELTATIME? might return :TRIGGER:A
:TRANSITION:DELTATIME 2.0000E-09
indicating that the delta time of the
transition trigger is set to 2 ns.
TRIGger:A{:TRANsition|:RISEFall}:POLarity
This command specifies the polarity for the transition trigger.
Group
Trigger
Syntax
TRIGger:A{:TRANsition|:RISEFall}:POLarity
{EITher|NEGative|POSitive}
TRIGger:A{:TRANsition|:RISEFall}:POLarity?
Arguments
POSitive indicates that a pulse edge must traverse from the lower (most
negative) to higher (most positive) level for transition triggering to occur.
NEGative indicates that a pulse edge must traverse from the upper (most positive)
to lower (most negative) level for transition triggering to occur.
EITher indicates either positive or negative polarity.
Examples
TRIGGER:A:TRANSITION:POLARITY NEGATIVE sets the transition polarity to
negative.
2-908 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
TRIGGER:A:TRA
NSITION:POLARITY?
might return :TRIGGER:A:
TRANSITION:POLARITY EITHER
indicating that the polarity can be either
positive or negative.
TRIGger:A{:TRANsition|:RISEFall}:SOUrce
This command specifies the source for a transition trigger.
Group
Trigger
Syntax
TRIGger:A{:TRANsition|:RISEFall}:SOUrce {CH1|CH2|CH3|CH4}
TRIGger:A{:TRANsition|:RISEFall}:SOUrce?
Arguments
CH1–CH4 specifies one of the analog channels to be used as the source for a
transition trigger.
Examples
TRIGGER:A:TRANSITION:SOURCE CH4 sets channel 4 as the source for the
transition trigger.
TRIGGER:A:TRANSITION:SOURCE? might return :TRIGGER:A:TRANSITION:
SOURCE CH2
indicating that channel 2 is the source for the transition trigger.
TRIGger:A{:TRANsition|:RISEFall}:WHEn
This command specifies whether to check for a transitioning signal that is faster or
slower than the specified delta time.
Group
Trigger
Syntax
TRIGger:A{:TRANsition|:RISEFall}:WHEn
{SLOWer|FASTer|EQual|UNEQual}
TRIGger:A{:TRANsition|:RISEFall}:WHEn?
Arguments
FASTer sets the trigger to occur when the signal transition time is faster than the
time set by
TRIGger:A:TRANsition:DELTatime.
SLOWer sets the trigger to occur when the signal transition time is slower than the
time set by.
TRIGger:A:TRANsition:DELTatime.
EQual sets the trigger to occur when the signal transition time is equal to the time
set by
TRIGger:A:TRANsition:DELTatime.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-909
Commands Listed in Alphabetical Order
UNEQual sets th
e trigger to occur when the signal transition time is not equal to
the time set by
TRIGger:A:TRANsition:DELTatime.
Examples
TRIGGER:A:TRANSITION:WHEN SLOWER sets the trigger to occur
when the signal transition time is slower than the time set by the
TRIGger:A:TRANsition:DELTatime command.
TRIGGER:A:TRANSITION:WHEN? might return :TRIGGER:A:TRANSITION :
WHEN FA STER
TRIGger:A:TYPe
This command sets the type of A trigger (either edge, logic, pulse, bus or video).
If you set the trigger type to LOGIc, you also need to set the logic trigger class
(logic or setup/hold) using the command TRIGger:A:LOGIc:CLAss. If you set
the trigger type to PULSe, you also need to set the pulse trigger class (either runt,
width, transition or timeout), using the command TRIGger:A:PULse:CLAss.If
you set the trigger type to BUS, you also need to set the bus type (CAN, I
2
C,
SPI, RS-232, Ethernet, MIL-STD-1553,LIN,USB,audio,FlexRay,orparallel)
using the command TRIGger:A:BUS.
NOTE. A series of example command sequences showing d ifferent searches and
triggers is included as an appendix. (See page F-1, Search and Trigger Command
Sequence Examples.)
Group
Trigger
Syntax
TRIGger:A:TYPe {EDGe|LOGIc|PULSe|BUS|VIDeo}
TRIGger:A:TYPe?
Related Commands
TRIGger:A:EDGE?,
TRIGger:A:LOGIc:CLAss,
TRIGger:A:BUS
Arguments
EDGe is the default trigger. A trigger event occurs when a signal passes through
a specified voltage level in a specified direction and is controlled by the
TRIGger:A:EDGE? commands.
LOGIc specifies that a trigger occurs when specified conditions are met and
is controlled by the TRIGger:A:LOGIc? commands. This trigger type is
equivalent to the logic and setup/hold triggers found in the user interface. Use
2-910 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual