MDO3000 Programmer Manual.pdf - 第905页

Commands Listed in Alphabetical Order Arguments AC spec ifies AC t rigger coupling, DC specifies DC trigger coupling, which p asses all input signals to the trigge r circuitry . HFRej specifies high-frequency rejection c ou…

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Commands Listed in Alphabetical Order
Group
Trigger
Syntax
TRIGger:A:BUS:SOUrce {B1|B2|B3|B4}
TRIGger:A:BUS:SOUrce?
Arguments
B1 specifies the Bus 1 source.
B2 specifies the Bus 2 source.
B3 specifies the Bus 3 source.
B4 specifies the Bus 4 source.
TRIGger:A:EDGE? (Query Only)
Returns the trigger source, coupling, and slope for the A edge trigger.
Group
Trigger
Syntax
TRIGger:A:EDGE?
Related Commands
TRIGger:A:LOGIc?
Examples
TRIGGER:A:EDGE? might return :TRIGGER:A:EDGE:SOURCE CH1;COUPLING
DC; SLO PE RISE
indicating the trigger source, coupling, and slope for the A
edge trigger.
TRIGger:A:EDGE:COUPling
This command specifies the type of coupling for the A edge trigger.
Group
Trigger
Syntax
TRIGger:A:EDGE:COUPling {AC|DC|HFRej|LFRej|NOISErej}
TRIGger:A:EDGE:COUPling?
Related Commands
TRIGger:A:EDGE:SOUrce,
TRIGger:A:EDGE:SLOpe
2-874 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Arguments
AC specifies AC t
rigger coupling,
DC specifies DC trigger coupling, which passes all input signals to the trigger
circuitry.
HFRej specifies high-frequency rejection coupling, which attenuates signals
above 50 kHz before passing the signals to the trigger circuitry.
LFRej specifies low-freque
ncy rejection coupling, which attenuates signals below
50 kHz before passing the signals to the trigger circuitry.
NOISErej specifies noise-rejection coupling, which provides stable triggering
by increasing the trigger hysteresis. Increased hysteresis reduces the trigger
sensitivity to noise but may require greater trigger signal amplitude.
Examples
TRIGGER:A:EDGE:COUPLING DC sets the A edge trigger coupling to DC.
TRIGGER:A:EDGE:COUPLING? might return :TRIGGER:A:EDGE:COUPLING
DC
indicating that the A edge trigger coupling is set to DC.
TRIGger:A:EDGE:SLOpe
This command specifies the slope for the A edge trigger: rising, falling or either.
NOTE. A series of example command s equences showing different searches and
triggers is included as an appendix. (See page F-1, Search and Trigger Command
Sequence Examples.)
Group
Trigger
Syntax
TRIGger:A:EDGE:SLOpe {RISe|FALL|EITHer}
TRIGger:A:EDGE:SLOpe?
Related Commands
TRIGger:A:EDGE:SOUrce,
TRIGger:A:EDGE:COUPling
Arguments
RISe specifies to trigger on the rising or positive edge of a signal.
FALL specifies to trigger on the falling or negative edge of a signal.
EITHer specifies to trigger on either the rising or falling edge of a signal.
Examples
TRIGGER:A:EDGE:SLOPERISE sets the A edge trigger slope to positive, which
triggers on the rising edge of the signal.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-875
Commands Listed in Alphabetical Order
TRIGGER:A:EDG
E:SLOPE?
might return :TRIGGER:A:EDGE:SLOPE FALL
indicating that the A edge trigger slope is negative.
TRIGger:A:EDGE:SOUrce
This command specifies the source for the A edge trigger.
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 E
xamples.),
To set the trigger voltage threshold level for the edge, pulse width, runt,
transiti
on (rise/fall or slew rate) trigge r, use TRIGger:A:LEVel:AUXin ,
TRIGger:A:LEVel:CH<x>,orTRIGger:A:LEVel:D<x>.
Group
Trigge
r
Syntax
TRIGger:A:EDGE:SOUrce {AUX|CH1|CH2|CH3|CH4|
D0|D1|D2|D3|D4|D5|D6|D7|D8|D9|D10|D11|D12|D13|D14|D15|LINE|R F}
TRIGger:A:EDGE:SOUrce?
Related Commands
TRIGger:A:EDGE:SLOpe,
TRIGger:A:EDGE:COUPling
Arguments
AUX specifies an external trigger using the auxiliary input connector located on the
front panel of the oscilloscope. (For MSO/DPO4000B series models or 2-channel
MDO3000 models only.)
CH1–CH4 specifies an analog input channel as the A edge trigger source.
D0–D15 specifies a digital channel as the source (MSO/MDO4000/B models
only as well as MDO3000 and MDO400C models with option MDO3MSO or
MDO4MSO installed).
LINE specifies the AC power line as the trigger source.
RF specifies the internal RF power level as the trigger source. (MDO4000/B/C
models only. MDO4TRIG application module is not necessary.)
Examples
TRIGGER:A:EDGE:SOURCECH1 sets channel 1 as the A edge trigger source.
TRIGGER:A:EDGE:SOURCE? might return :TRIGGER:A:EDGE:SOU RCE CH1
indicating that channel 1 is the A edge trigger source.
2-876 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual