MDO3000 Programmer Manual.pdf - 第927页

Commands Listed in Alphabetical Order Syntax TRIGger:A:RUN T:SOUrce { CH1 |CH2|CH3|CH4|RF } TRIGger:A:RUN T:SOUrce? Arguments CH1–CH4 speciﬁes the analog channel number to use as the source waveform for the runt trigger …

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

Commands Listed in Alphabetical Order

Examples

TRIGGER:A:RUN

T:WHEN MORETHAN

sets the runt trigger to occur when the

oscilloscope detects a runt in a pulse wider than the speciﬁed width.

TRIGGER:A:RU

NT:WHEN?

might return :TRIGGER:A:PULSE:RUNT:WHEN

OCCURS

indicating that a runt trigger will occur if the oscilloscope detects a runt

of any detectable width.

TRIGger:A:

RUNT:WIDth

This command speciﬁes the width, in seconds, for a runt trigger.

To set the trigger voltage threshold level for the edge, pulse width, runt,

or transition (rise/fall or slew rate) trigger, use TRIGger:A:LEVel:AUXin,

TRIGger:A:LEVel:CH<x>,orTRIGger:A:LEVel:D<x>.

Group

Trigger

Syntax

TRIGger:A:RUNT:WIDth <NR3>

TRIGger:A:RUNT:WIDth?

Related Commands

TRIGger:A:RUNT:WHEn

Arguments

<NR3> is a ﬂoating point number that speciﬁes the minimum width, in seconds.

Examples

TRIGGER:A:RUNT:WIDTH 15E-6 sets the minimum width of the pulse runt

trigger to 15 µs.

TRIGGER:A:RUNT:WIDTH? might return :TRI GGER:A:PULSE:RUNT:WIDTH

2.0000E-09

indicating that the minimum width of a pulse runt trigger is 2 ns.

TRIGger:A:SETHold? (Query Only)

Returns the clock edge polarity, voltage threshold and source input; data voltage

threshold and source; and both setup and hold times for setup and hold violation

triggering.

Group

Trigger

Syntax

TRIGger:A:SETHold?

2-898 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual