MDO3000 Programmer Manual.pdf - 第915页

Commands Listed in Alphabetical Order LESSTHAN;WHEN :LESSLIMIT 16.0000E-9;LIM IT 16.0000E-9;:T RIGGER:A:LOGIC:P ATTERN:DELTATIME 16.0000E-9 TRIGger:A:LOGIc:P A Ttern:DEL T atime This command specifies the pattern trigger …

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Commands Listed in Alphabetical Order
TRIGger:A:LO
GIc:INPut:RF
This command specifies the logic level to use when the internal RF power levelis
the source for a logic pattern trigger.
Conditions
MDO4000/B and MDO4000C with option SA3 or SA6 only. Also requires
installation of an MDO4TRIG application module.
Group
Trigger
Syntax
TRIGger:A:LOGIc:INPut:RF {HIGH|LOW|X}
TRIGger:A:LOGIc:INPut:RF?
Related Commands
TRIGger:A:LOGIc:THReshold:RF,TRIGger:A:LOGIc:FUNCtion,
TRIGger:A:LOGIc:PATtern:WHEn
Arguments
HIGH specifies to trigger on a high logic level.
LOW specifies to trigger on a low logic level.
X specifies a “don't care” condition.
Examples
TRIGger:A:LOGIc:INPut:RF HIGH spec
ifies to trigger on a high logic level
when the internal RF power level is the source for a logic pattern trigger.
TRIGger:A:LOGIc:INPut:RF? might r
eturn X, indicating that it doesn’t matter
whether the logic level is high or low.
TRIGger:A:LOGIc:PATtern? (Query Only)
Returns the conditions used for generating an A logic pattern trigger, with respect
to the defined input pattern, and identifies the time that the selected pattern may
be true and still generate the trigger.
Group
Trigger
Syntax
TRIGger:A:LOGIc:PATtern?
Examples
TRIGGER:A:LOGIC:PATTERN? might return
:TRIGGER:A:LOGIC:PATTERN:INPUT:CH1 HIGH;CH2
LOW;CH3 X;CH4 X;:TRIGGER:A:LOGIC:P ATTERN:WHEN
2-884 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
LESSTHAN;WHEN
:LESSLIMIT 16.0000E-9;LIM IT
16.0000E-9;:TRIGGER:A:LOGIC:PATTERN:DELTATIME 16.0000E-9
TRIGger:A:LOGIc:PATtern:DELTatime
This command specifies the pattern trigger delta time value. The time value is
used as part of the pattern trigger condition to determine if the duration ofalogic
pattern meets the specified time constraints.
Group
Trigger
Syntax
TRIGger:A:LOGIc:PATtern:DELTatime <NR3>
TRIGger:A:LOGIc:PATtern:DELTatime?
Arguments
<NR3> is a floating point value with exponent that sets the pattern trigger time
value. This argument has a range of 39.6E–9 (39.6 ns) to 10.0E0 (10 s), in
increments of 13.2 ns. Values that are not an increment of 13.2 ns are roundedto
the nearest correct value.
Examples
TRIGGER:A:LOGIC:PATTERN:DELTATIME 71.28E-8 sets the pattern trigger
delta time value to 712.8 ns.
TRIGger:A:LOGIc:PATtern:WHEn
This command specifies the pattern logic condition on which to trigger the
oscilloscope.
Group
Trigger
Syntax
TRIGger:A:LOGIc:PATtern:WHEn
{TRUe|FALSe|LESSthan|MOREthan|EQual|UNEQual}
TRIGger:A:LOGIc:PATtern:WHEn?
Arguments
TRUE triggers the oscilloscope when the pattern becomes true.
FALSE triggers the oscilloscope when the pattern becomes false.
LESSTHAN triggers the oscilloscope when the input pattern is true for a time period
less than the time period specified in
TRIGGER:A:LOGIC:PATTERN:DELTATIME.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-885
Commands Listed in Alphabetical Order
MORETHAN trigg
ers the oscilloscope when the input pattern is true
for a time period more (greater) than the time period specified in
TRIGGER:A:LOGIC:PATTERN:DELTATIME.
EQUAL triggers the oscilloscope when the input pattern is true for a time period
equal to the time period specified in
TRIGGER:A:LOGIC:PATTERN:DELTATIME,
within a ±5% tolerance.
UNEQUAL triggers the oscilloscope when the input pattern is true for a time
period greater than or less than (not equal to) the time period specified in
TRIGGER:A:LOGIC:PATTERN:DELTATIME, within a ±5% tolerance.
Examples
TRIGGER:A:LOGIC:PATTERN:WHEN LESSTHAN sets the oscilloscope to trigger
when the pattern is true for a time period less than the pattern trigger delt
a time
setting.
TRIGger:A:LOGIc:THReshold:CH<x>
This command sets or queries the trigger A logic threshold voltage for the
specified channel x.
Group
Trigger
Syntax
TRIGger:A:LOGIc:THReshold:CH<x> {<NR3>|ECL|TTL}
TRIGger:A:LOGIc:THReshold:CH<x>?
Arguments
<NR3> is a floating point number that specifies the threshold voltage, in volts.
ECL specifies a preset ECL high level of –1.3V.
TTL specifies a preset TTL high level of 1.4V.
Examples
TRIGGER:A:LOGIC:THRESHOLD:CH2 3.0E-3 sets the A logic trigger threshold
voltageforChannel2to3mV.
TRIGGER:A:LOGIC:THRESHOLD:CH3? might return
:TRIGGER:A:LOGIC:THRESHOLD:CH3 1.2000E+00, indicating that the A
logic trigger threshold voltage for Channel 3 is 1.2 V.
TRIGger:A:LOGIc:THReshold:D<x>
This command specifies the trigger A logic threshold level for the specified digital
channel <x>. This commands affects all trigger types using the digital channel.
2-886 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual