MDO3000 Programmer Manual.pdf - 第957页

Commands Listed in Alphabetical Order Arguments <NR3> i safl o a t i ng point number that specifies the threshold in volts. ECL specifies a pre set ECL high level of -1.3V . TTL specifies a prese t TTL high leve l of 1…

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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
Commands Listed in Alphabetical Order
Syntax
TRIGger:B:TIM
e <NR3>
TRIGger:B:TIMe?
Related Commands
TRIGger:B:BY
, TRIGger:B:EVENTS:COUNt
Arguments
<NR3> is a floating point number that specifies the B trigger delay time in seconds.
Examples
TRIGGER:B:TIME 4E-6 sets the B trigger delay time to 4 µs.
TRIGGER:B:TIME? might return :TRIGGER:B:TIME 16.0000E-9 indicating
that the B trigger time is set to 16 ns.
TRIGger:B:TYPe
This command specifies the type of B trigger. The only supported B trigger type
is EDGE.
Group
Trigger
Syntax
TRIGger:B:TYPe EDGE
TRIGger:B:TYPe?
Related Commands
TRIGger:A:TYPe
Arguments
EDGE sets the B trigger type to edge.
Examples
TRIGGER:B:TYPE EDGE sets the B trigger type to edge.
TRIGGER:B:TYPE? might return:TRIGGER:B:TYPE EDGE.
TRIGger:EXTernal? (Query Only)
Returns all external trigger-related parameters for the probe attached totheAux
Input connector.
Conditions
For MSO/DPO 4000B series models, MDO4000C series models without an RF
option, and 2-channel MDO3000 models only.
Group
Trigger
2-928 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual