MDO3000 Programmer Manual.pdf - 第954页

Commands Listed in A lphabetical Order Examples TRIGGER:B:EVE NTS? might return :TRIGGER:B:EV ENTS:COUNT 2 indicating that 2 events must occur before the B trigger occurs. TRIGger:B:EVENTS:COUNt This command specifies the…

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Commands Listed in Alphabetical Order
TRIGGER:B:EDG
E:SLOPE?
might return :TRIGGER:B:EDGE:SLOPE RISE
indicating that the B edge trigger occurs on the rising slope.
TRIGger:B:EDGE:SOUrce
This command specifies the source for the B trigger.
Group
Trigger
Syntax
TRIGger:B:EDGE:SOUrce {CH1|CH2|CH3|CH4|AUX|LINE|RF}
TRIGger:B:EDGE:SOUrce?
Related Commands
TRIGger:B:EDGE?
Arguments
CH1–4 specifies an analog channel as the B trigger source.
AUX specifies an external trigger using the Aux In connector located on the
front panel of the oscilloscope as the B trigger source. (For MSO/DPO 4000B
series models, MDO4000C series models without an RF option, and 2-channel
MDO3000 models only.)
LINE specifies the AC power line as the B trigger source.
RF specifies to use the internal RF power level as the source. (MDO4000/B/C
models only). Also requires installation of an MDO4TRIG application module.)
Examples
TRIGGER:B:EDGE:SOURCE CH4 sets channel 4 as the input source for the B
trigger.
TRIGGER:B:EDGE:SOURCE? might return :TRI GGER:B:EDGE:SOURCE CH1
indicating that the current input source for the B trigger is channel 1.
TRIGger:B:EVENTS? (Query Only)
Returns the current B trigger events parameter.
Group
Trigger
Syntax
TRIGger:B:EVENTS?
Related Commands
TRIGger:B:EVENTS:COUNt
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-923
Commands Listed in Alphabetical Order
Examples
TRIGGER:B:EVE
NTS?
might return
:TRIGGER:B:EVENTS:COUNT 2
indicating that 2 events must occur before the B trigger occurs.
TRIGger:B:EVENTS:COUNt
This command specifies the number of events that must occur before the B trigger
(when TRIG:DELay:BY is set to EVENTS).
Group
Trigger
Syntax
TRIGger:B:EVENTS:COUNt <NR1>
TRIGger:B:EVENTS:COUNt?
Related Commands
TRIGger:B:EVENTS?
Arguments
<NR1> is the number of B trigger events, which can range from 1 to 10,000,000.
Examples
TRIGGER:B:EVENTS:COUNT 4 specifies that the B trigger will occur four trigger
events after the A trigger.
TRIGGER:B:EVENTS:COUNT? might return :TRIGGER:B:EVENTS:COUNT 2
indicating that two events must occur after the A trigger before the B trigg
er
can occur.
TRIGger:B:LEVel
This co
mmand specifies the level for the B trigger.
Group
Trigger
Syntax
TRIGger:B:LEVel {TTL|<NR3>}
TRIGger:B:LEVel?
Related Commands
TRIGger:B, TRIGger:B:EDGE:SOUrce
Arguments
TTL specifies a preset TTL high level of 1.4 V.
<NR3> is a floating point number that specifies the B trigger level, in volts.
2-924 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Examples
TRIGGER:B:LEV
EL TTL
sets the B trigger level to 1.4 V.
TRIGGER:B:LEVEL? might return :TRIGGER:B:LEVEL 173.0000E-03
indicating that the B trigger level is currently set at 173 mV.
TRIGger:B:LEVel:CH<x>
This command specifies the B trigger level for channel <x>, where x is the
channel number. Each Channel can have an independent Level.
Group
Trigger
Syntax
TRIGger:B:LEVel:CH<x> {ECL|TTL|<NR3>}
TRIGger:B:LEVel:CH<
x>?
Arguments
ECL specifies a preset ECL high level of –1.3V.
TTL specifies a preset TTL high level of 1.4V.
<NR3> is a floating point number that specifies the trigger level in user units
(usually volts).
Examples
TRIGGER:B:LEVEL:CH2? might return :TRIGGER:B:LEVEL:CH2
1.3000E+00
indicating that the B edge trigger is set to 1.3 V for channel 2.
TRIGGER:B:LEVEL:CH3 TTL sets the B edge trigger to TTL high level for
channel 3.
TRIGger:B:LEVel:D<x>
This command specifies the B trigger level for digital channel <x>, where x isthe
channel number. Each chann
el can have an independent level.
NOTE. MDO3000 models only have two digital threshold contro ls: 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.
Group
Trigger
Syntax
TRIGger:B:LEVel:D<x> {ECL|TTL|<NR3>}
TRIGger:B:LEVel:D<x>?
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-925