MDO3000 Programmer Manual.pdf - 第907页
Commands Listed in Alphabetical Order TRIGger:A:HO LDoff? (Query Only) Returns the A trigger holdoff parameters. These parameters s pecify the ti me period during which the trigger circuitry is not looking to generate a …
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
Commands Listed in Alphabetical Order
TRIGger:A:HO
LDoff? (Query Only)
Returns the A trigger holdoff parameters. These parameters specify the time
period during which the trigger circuitry is not looking to generate a trigger event.
Group
Trigger
Syntax
TRIGger:A:HOLDoff?
Related Commands
TRIGger:A:HOLDoff:TIMe
Examples
TRIGGER:A:HOLDOFF? might return :TRIGGER:A:HOLDOFF: TIME
900.0000E-09;BY DEFAULT
indicating that the A edge trigger holdoff time
(by default) is 900 ns.
TRIGger:A:HOLDoff:TIMe
This command specifies the A trigger holdoff time.
Group
Trigger
Syntax
TRIGger:A:HOLDoff:TIMe <NR3>
TRIGger:A:HOLDoff:TIMe?
Arguments
<NR3> is a floating point number that specifies the holdoff time in seconds. The
range is from 20 ns through 8.0 s.
Examples
TRIGGER:A:HOLDOFF:TIME ? might return :TRIGGER:A:HOLDOFFTIME
1.2000E-06
indicating that the A trigger holdoff time is set to 1.2 µs.
TRIGGER:A:HOLDOFF:TIME 10 sets the A trigger holdoff time to 10 s.
TRIGger:A:LEVel:AUXin
This command sets the threshold voltage level to use for an Edge, Pulse Width,
Runt or Rise/Fall (aka Transition, aka Slew Rate) trigger when triggering on the
Aux Input connector signal.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-877
Commands Listed in Alphabetical Order
Conditions
This command is
not available for MDO4000/B series models, or 4-channel
MDO3000 series models as they have no Aux Input connector.
Group
Trigger
Syntax
TRIGger:A:LEVel:AUXin {<NR3>|ECL|TTL}
TRIGger:A:LEVel:AUXin?
Arguments
<NR3> is a floating point number that sets the trigger threshold level, in Volts,
for the Aux Input connector.
ECL sets the threshold level to a preset ECL high level of -1.3V.
TTL sets the threshold level to a preset TTL high level of 1.4V.
TRIGger:A:LEVel:CH<x>
This command sets the threshold voltage level to use for an Edge, Pulse Width,
Runt or Rise/Fall (aka Transition, aka Slew Rate) trigger when triggering on an
analog channel waveform. x can be 1 - 4. Each channel can have an independent
trigger level.
Group
Trigger
Syntax
TRIGger:A:LEVel:CH<x> {<NR3>|ECL|TTL}
TRIGger:A:LEVel:CH<x>?
Arguments
<NR3> is a floating point number that sets the trigger threshold level, in Volts, for
the specified analog channel.
ECL sets the threshold level to a preset ECL high level of -1.3V.
TTL sets the threshold level to a preset TTL high level of 1.4V.
TRIGger:A:LEVel:D<x>
This command sets the threshold voltage level to use for an Edge or Pulse Width
trigger when triggering on a digital channel waveform. <x> can be 1 - 16. Each
channel can have an independent trigger level.
2-878 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual