MDO3000 Programmer Manual.pdf - 第926页

Commands Listed in A lphabetical Order TRIGger:A:RU NT? (Query Only) Returns the current A runt trigger parameters. Group T rigger Syntax TRIGger:A:RUN T? Examples TRIGGER:A:RUN T? might return :TRIGG ER:A:RUNT:SOURCE CH…

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Commands Listed in Alphabetical Order
WIThin causes a
trigger when a pulse is detected that is within a range set by
two values.
OUTside cause
s a trigger when a pulse is detected that is outside of a range set
by two values.
Examples
TRIGGER:A:PULSEWIDTH:WHEN LESSTHAN 2.0000E-9 causes the
oscilloscope to trigger when a pulse is detected that is shorter than 2 ns.
TRIGGER:A:PULSEWIDTH:WHEN? might return :TR IGGER:A:PULSEWIDTH:
WHEN GR EATER THAN 2.0000E-9
indicating that a trigger will be caused when
a pulse is detected great
er than 2 ns.
To trigger on pulses with durations (widths) that fall outside of the range of 100
nanoseconds to 110 nano
seconds:
TRIGger:A:PULSEWidth:LOWLimit 100.0E-9
TRIGger:A:PULSEWidth:HIGHLimit 110.0E-9
TRIGger:A:PULSEWidth:WHEn OUTside
TRIGger:A:PULSEWidth:WIDth
This command specifies the pulse width (duration), in seconds, for triggering
on pulses whose wid
ths are greater than, less than, equal to, or not equal to the
specified value.
Group
Trigger
Syntax
TRIGger:A:PULSEWidth:WIDth <NR3>
TRIGger:A:PULSEWidth:WIDth?
Related Commands
TRIGger:A:PULSEWidth:WHEn
Arguments
<NR3> is a floating point number that specifies the pulse width in seconds.
Examples
TRIGGER:A:PULSEWIDTH:WIDTH 5.0E-6 sets the pulse width to 5 µs.
TRIGGER:A:PULSEWIDTH:WIDTH? might return :TRIGGER:A:PULSEWIDTH:
WIDTH 2 .0000E-9
indicating that the pulse width is set to 2 ns.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-895
Commands Listed in Alphabetical Order
TRIGger:A:RU
NT? (Query Only)
Returns the current A runt trigger parameters.
Group
Trigger
Syntax
TRIGger:A:RUNT?
Examples
TRIGGER:A:RUNT? might return :TRIGGER:A:RUNT:SOURCE CH1;POLARITY
POSITIVE;WHEN OCCURS;W IDTH 4.0000E-9
.
TRIGger:A:RUNT:POLarity
This command specifies the polarity for the runt trigger.
Group
Trigger
Syntax
TRIGger:A:RUNT:POLarity {EITher|NEGative|POSitive}
TRIGger:A:RUNT:POLarity?
Arguments
POSitive indicates that the rising edge crosses the low threshold and the falling
edge recrosses the low threshold without either edge ever crossing the high
threshold.
NEGative indicates that the falling edge crosses the high threshold and the
rising edge recrosses the high threshold without either edge ever crossingthe
low threshold.
EITher triggers on a runt of either polarity.
Examples
TRIGGER:A:RUNT:POLARITY NEGATIVE specifies that the polarity of the A
pulse runt trigger is negative.
TRIGGER:A:RUNT:POLARITY? might return : TRIGGER:A:RUNT:POLARITY
POSITIVE
indicating that the polarity of the A pulse runt trigger is positive.
TRIGger:A:RUNT:SOUrce
This command specifies the source waveform for the A runt trigger.
Group
Trigger
2-896 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Syntax
TRIGger:A:RUN
T:SOUrce { CH1|CH2|CH3|CH4|RF}
TRIGger:A:RUNT:SOUrce?
Arguments
CH1–CH4 specifies the analog channel number to use as the source
waveform for the runt trigger. To specify the threshold levels when using
CH1–CH4 as the source, use TRIGger:A:LOWerthreshold:CH<x> and
TRIGger:A:UPPerthreshold:CH<x>.
RF specifies the internal RF power level as the source (MDO4000/B/C models
only, and requires installation of an MDO4TRIG application module.) To
specify the threshold levels when using RF power level as the source, use
TRIGger:A:LOWerthreshold:RF and TRIGger:A:UPPerthreshold:RF.
Examples
TRIGGER:A:RUNT:SOURCE CH4 sets channel 4 as the trigger source.
TRIGGER:A:RUNT:SOURCE? might return :TRI GGER:A:RUNT:SOURCE CH2
indicating that channel 2 is the trigger source.
TRIGger:A:RUNT:WHEn
This command specifies the type of pulse width the trigger checks for when
it detects a runt.
Group
Trigger
Syntax
TRIGger:A:RUNT:WHEn {LESSthan|MOREthan|EQual|UNEQual|OCCURS}
TRIGger:A:RUNT:WHEn?
Related Commands
TRIGger:A:RUNT:WIDth
Arguments
OCCURS argument specifies a trigger event if a runt of any detectable width occurs.
LESSthan argument sets the oscilloscope to trigger if the a runt pulse is detected
with width less than the time set by the TRIGger:A:RUNT:WIDth command.
MOREthan argument sets the oscilloscope to trigger if the a runt pulse is detected
with width greater than the time set by the TRIGger:A:RUNT:WIDth command.
EQual argument sets the oscilloscope to trigger if a runt pulse is detected with
width equal to the time period specified in TRIGger:A:RUNT:WIDth within
a ±5% tolerance.
NOTEQual argument sets the oscilloscope to trigger if a runt pulse is detected with
width greater than or less than (but not equal to) the time period specified in
TRIGger:A:RUNT:WIDth within a ±5% tolerance.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-897