MDO3000 Programmer Manual.pdf - 第941页

Commands Listed in Alphabetical Order TRIGger:A:LOG Ic:CLAss to further select the logic trigger class (either LOGIC or SETHOLD ). PULSe speciﬁe s that a trigger occurs when a speciﬁed pulse is found. Use TRIGger:A:PULse…

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

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

Commands Listed in Alphabetical Order

TRIGger:A:LOG

Ic:CLAss to further select the logic trigger class (either

LOGIC

or SETHOLD ).

PULSe speciﬁe

s that a trigger occurs when a speciﬁed pulse is found. Use

TRIGger:A:PULse:CLAss to further select the pulse trigger class (either runt,

width, transition or timeout).

BUS speciﬁes that a trigger occurs when a bus signal is found. Supports CAN,

C, SPI, RS-232, Ethernet, MIL-STD-1553, LIN, USB, audio, FlexRay buses

(with the appropriate application module installed) as well as parallel buses

(MSO4000B, MDO4000/B/C, and MDO3000 Series oscilloscopes with option

MDO3MSO installed only). Use TRIGger:A:BUS to set the bus type.

VIDeo speciﬁes that the trigger occurs when a video signal is found.

Examples

TRIGGER:A:TYPE PULSe sets the A trigger type to PULSE.

TRIGGER:A:TYPE? might return :TRIGGER:A:TYPE PULSE indicating that the

A trigger type is a pulse trigger.

TRIGger:A:UPPerthreshold:CH<x>

This command sets the upper threshold for channel <x>, where x is the analog

channel number 1–4. Each channel can have an independent level. Used only for

runt and transition trigger types.

Group

Trigger

Syntax

TRIGger:A:UPPerthreshold:CH<x> {<NR3>|ECL|TTL}

TRIGger:A:UPPerthreshold:CH<x>?

Arguments

<NR3> is a ﬂoating point number that speciﬁes the threshold level, in volts.

ECL speciﬁes a preset ECL high level of –1.3V.

TTL speciﬁes a preset TTL high level of 1.4V.

Examples

TRIGGER:A:UPPERTHRESHOLD:CH2 50E-3 sets the upper limit of the pulse

runt trigger to 50 mV for channel 2.

TRIGGER:A:UPPERTHRESHOLD:CH2? might return :TRIGGER:A:

UPPERTHRESHOLD:CH2 1.2000E-01

indicating that the upper limit of the pulse

runt trigger is set to 120 mV.

MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-911

Commands Listed in Alphabetical Order

TRIGger:A:UP

Perthreshold:RF

This command speciﬁes the upper threshold when the internal RF power level is

used during runt triggering. To specify the lower threshold for the RUNT trigger

type as well a

s the single threshold for the Pulse and Timeout trigger types, use

the command TRIGger:A:LOWerthreshold:RF. To choose the RUNT trigger type,

use the command TRIGger:A:PULse:CLAss. To specify RF power as a source

during runt triggering, use TRIGger:A:RUNT:SOUrce.

Conditions

MDO4000/B/C models only. Also requires installation of an MDO4TRIG

application module.

Group

Trigger

Syntax

TRIGger:A:UPPerthreshold:RF {<NR3>}

TRIGger:A:UPPerthreshold:RF?

Related Commands

TRIGger:A:TYPe, TRIGger:A:LOWerthreshold:RF

Arguments

<NR3> is a ﬂoating point number that speciﬁes the threshold to use, in the

currently selected RF units (using RF:UNIts). The range is (ref level – 40 dBm) to

(ref level + 10 dBm), but never less than –65 dBm or more than +30 dBm.

Examples

TRIGger:A:UPPerthreshold:RF —1.000E+1 sets the threshold to –10 dBm.

TRIGger:A:UPPerthreshold:RF? might return -30.0000, indicating that the

threshold set to –30.000 dBm (assuming the units are currently set to dBm).

TRIGger:A:VIDeo? (Query Only)

Returns the A trigger video parameters.

Conditions

This command requires a DPO4VID application module to use any standard

besides NTSc, PAL, or SECAM, except for MDO3000 models, which do not

require an application module.

Group

Trigger

Syntax

TRIGger:A:VIDeo?

2-912 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual