MDO3000 Programmer Manual.pdf - 第910页

Commands Listed in A lphabetical Order TRIGger:A:LO GIc:CLAss This command speciﬁes what kind of logic trigger to use (either logic or setup/hold). Y ou also need to set the trigger type to LOGIC using the command TRIGge…

Commands Listed in Alphabetical Order

NOTE. MDO3000 m

odels only have two digital threshold controls: one for digital

channels D0 - D7, and the other for D8 - D15. Digital channel trigger levels

cannot be set independently for these models. Changing one digital channel’s

threshold l evel changes all of the channels’ levels in the same set.

Conditions

MSO/MDO4000/B/C models only as well as MDO3000 models with option

MDO3MSO installed.

Group

Trigger

Syntax

TRIGger:A:LEVel:D<x> {<NR3>|ECL|TTL}

TRIGger:A:LEVel:D<x>?

Arguments

<NR3> is a ﬂoating point number that sets the trigger threshold level, in Volts, for

the speciﬁed digital channel.

ECL sets the threshold level to a preset ECL high level of -1.3V.

TTL sets the threshold level to a preset TTL high level of 1.4V.

TRIGger:A:LOGIc? (Query Only)

Returns all of the A logic trigger parameters.

Group

Trigger

Syntax

TRIGger:A:LOGIc?

Related Commands

TRIGger:A:LOGIc:CLAss

Examples

TRIGGER:A:LOGIC? might return :TRIGGER:A:LOGIC:CLASS

SETHOLD;FUNCTION AND;THRESHOLD:CH1 20.0000E-3;CH2 0.0000;

CH3 0.0 000;CH4 0.0000;:TRIGGER:A:LOGIC:INPUT:CH1

X;CH2 X ;CH3 X;CH4 X;CLOCK:SOURC E NONE;EDGE

RISE;:TRIGGER:A:LOGIC:PATTERN:INPUT:CH1 X;CH2 X;CH3

X;CH4 X ;:TRIGGER :A:LOGIC:PATTERN:WHEN TRUE;WHEN:LESSLIMIT

4.0000E-9;LIMIT 4.0000E-9;:TRIGGER:A:LOGIC:PATTERN:DELTATIME

4.0000E-9

MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-879

Commands Listed in Alphabetical Order

TRIGger:A:LO

GIc:CLAss

This command speciﬁes what kind of logic trigger to use (either logic or

setup/hold). You also need to set the trigger type to

LOGIC using the command

TRIGger:A:T

YPe.

The

LOGIC argument sets the oscilloscope to trigger on logical combinations

of the chann

els (set using the

TRIGger:A:LOGIc:INPut commands as

well as TRIGger:A:LOGIc:FUNCtion). Youcanuseupto20channels

for a logic trigger (4 analog and 16 digital). With an MDO4000/B/C,

you can also use the internal RF power level in a logic trigger (requires

installation of an MDO4TRIG application module). You can perform logic

triggering using a clock; when TRIGger:A:LOGIc:INPut:CLOCk:SOUrce

is set to

one of the channels, the oscilloscope triggers when the speciﬁed

logical combination of the remaining channels is true during a transition

on the clock channel. You can also perform logic triggering without using

a clock (by setting TRIGger:A:LOGIc:INPut:CLOCk:SOUrce to

NONE),

so that the oscilloscope triggers when the speciﬁed logical combination

of data channels is met. Without a clock, you can also use the command

TRIGg

er:A:LOGIc:PATtern:DELTatime.

The

SETHold argument sets the oscilloscope to trigger on setup and hold

viol

ations between a data source and a clock source. The clocking and data

levels are used to determine if a clock or data transition has occurred. You can

use up to 20 channels as Setup and Hold trigger data sources (4 analog and 16

digital) using TRIGger:A:SETHold:DATa:SOUrce. You can use one channel

input as the clock signal (TRIGger:A:SETHold:CLOCk:SOUrce). The data

sources cannot include the waveform speciﬁed for the clock source.

Group

Trigger

Syntax

TRIGger:A:LOGIc:CLAss {LOGIC|SETHold}

TRIGger:A:LOGIc:CLAss?

Related Commands

TRIGger:A:TYPe,

TRIGger:A:PULse:CLAss

Arguments

LOGIC – Use with the commands TRIGger:A:LOGIc:FUNCtion,

TRIGger:A:LOGIc:INPut:CH<x>, TRIGger:A:LOGIc:INPut:CLOCk:EDGE,

TRIGger:A:LOGIc:INPut:CLOCk:SOUrce, TRIGger:A:LOGIc:INPut:D<x>,and

TRIGger:A:LOGIc:INPut:RF.I

f you would like to use the logic trigger without a

clock, you can also use the command TRIGger:A:LOGIc:PATtern:DELTatime.

SETHold – Use with the command

s TRIGger:A:SETHold:CLOCk:EDGE,

TRIGger:A:SETHold:CLOCk:SOUrce, TRIGger:A:SETHold:CLOCk:

2-880 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual

Commands Listed in Alphabetical Order

THReshold, TRI

Gger:A:SETHold:DATa:SOUrce, TRIGger:A:SETHold:DATa:

THReshold, TRIGger:A:SETHold:HOLDTime, TRIGger:A:SETHold:SETTime,

TRIGger:A:SETHold:THReshold:CH<x>,andTRIGger:A:SETHold:THReshold:

D<x>.

Examples

TRIGGER:A:LOGIC:CLASS? might return :TRIGGER:A:LOGIC:CLASS LOGIC

TRIGGER:A:LOGIC:CLASS LOGIC

sets the trigger A logic class to LOGIc,which

causes the oscilloscope to trigger when the speciﬁed logical combinationsof

channels 1, 2, 3, and 4 are met.

TRIGger:A:LOGIc:FUNCtion

This command speciﬁes the logical combination of the input channels for the

A pattern and A state logic triggers.

Group

Trigger

Syntax

TRIGger:A:LOGIc:FUNCtion {AND|NANd|NOR|OR}

TRIGger:A:LOGIc:FUNCtion?

Related Commands

TRIGger:A:LOGIc:INPut:CH<x>

Arguments

AND speciﬁes to trigger if all conditions are true.

NANd speciﬁes to trigger if any of the conditions is false.

NOR speciﬁes to trigger if all conditions are false.

OR speciﬁes to trigger if any of the conditions is true.

Examples

TRIGGER:A:LOGIC:FUNCTION? might return :TRIGGER:A:LOGIC:FUNCTION

NAND

which indicates that

the oscilloscope will trigger if the AND logic conditions

are false.

TRIGGER:A:LOGIC:FUNCTION AND sets the logical combination of channels to

be true when all conditions are true.

TRIGger:A:LOGIc:INPut? (Query Only)

Returns the logic input values for all channels. If a clock channel is deﬁned,

it returns the clock source and edge.

MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-881