MDO3000 Programmer Manual.pdf - 第956页

Commands Listed in A lphabetical Order Arguments ECL specifies a p reset EC L high level of –1.3V . TTL specifies a prese t TTL high level of 1.4V . <NR3> is a floating point number that specifies the trigger level in …

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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
Commands Listed in Alphabetical Order
Arguments
ECL specifies a p
reset 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).
TRIGger:B:LOWerthreshold:CH<x>
This command specifies the B trigger lower threshold for the channel <x>, where
x is the channel number. Each channel can have an independent level. Used in
runt and transition triggers as the lower threshold. Used for all other trigger types
as the single level/threshold.
Group
Trigger
Syntax
TRIGger:B:LOWerthreshold:CH<x> {ECL|TTL|<NR3>}
TRIGger:B:LOWerthreshold: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 threshold level, in volts.
TRIGger:B:LOWerthreshold:D<x>
Sets or queries the lower threshold for the digital channel selected. Each channel
can have an independent level. Used in runt and transition triggers as the lower
threshold. Used for all other trigger types as the single level/threshold.
NOTE. MDO3000 models only have two di
gital 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 level changes all of the channels’ levels in the same set.
Group
Trigger
Syntax
TRIGger:B:LOWerthreshold:D<x> {<NR3>|ECL|TTL}
TRIGger:B:LOWerthreshold:D<x>?
2-926 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Arguments
<NR3> isafloati
ng point number that specifies the threshold in volts.
ECL specifies a preset ECL high level of -1.3V.
TTL specifies a preset TTL high level of 1.4V.
Examples
TRIGGER:B:LOWERTHRESHOLD:D1? might return
TRIGGER:B:LOWERTHRESHOLD:D1 1.4000 indicating the threshold is set to
1.4 volts.
TRIGger:B:STATE
This command specifies the state of B trigger activity. If the B trigger stateison,
the B trigger is part of the triggering sequence. If the B trigger state is off, then
only the A trigger causes the trigger event.
Group
Trigger
Syntax
TRIGger:B:STATE {ON|OFF|<NR1>}
TRIGger:B:STATE?
Related Commands
TRIGger:A:MODe
Arguments
ON specifies that the B trigger is active and in causes trigger events conjunction
with the A trigger.
OFF specifies that only the A trigger causes trigger events.
<NR1> a 0 turns off the B trigger; any other value activates the B trigger.
Examples
TRIGGER:B:STATE ON sets the B trigger to active, making it capable of causing
trigger events.
TRIGGER:B:STATE? might return :TRIGGER:B:STATE 0 indicating that the B
trigger is inactive and that only the A trigger causes trigger events.
TRIGger:B:TIMe
This command specifies B trigger delay time. The B Trigger time applies only if
TRIGger:B:BY is set to TIMe.
Group
Trigger
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-927