MDO3000 Programmer Manual.pdf - 第916页

Commands Listed in A lphabetical Order MORETHAN trigg ers the oscilloscope whe n the input pattern is true for a time period more (greater) than the time period specified in TRIGGER:A:LOG IC:PATTERN:DELTA TIME . EQUAL tri…

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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
Commands Listed in Alphabetical Order
NOTE. MDO3000 m
odels only have two digital 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 l evel changes all of the channels’ levels in the same set.
Group
Trigger
Syntax
TRIGger:A:LOGIc:THReshold:D<x> {<NR3>|ECL|TTL}
TRIGger:A:LOGIc:THReshold:D<x>?
Arguments
<NR3> is a floating point number that specifies the threshold level in volts.
ECL specifies a preset ECL high level of –1.3V.
TTL specifies a preset TTL high level of 1.4V.
TRIGger:A:LOGIc:THReshold:RF
This command specifies the threshold to use when the internal RF power level is
the source for a logic trigger. It will affect all trigger types using the channel.
Conditions
MDO4000/B/C models only. Also requires installation of an MDO4TRIG
application module.
Group
Trigger
Syntax
TRIGger:A:LOGIc:THReshold:RF {<NR3>}
TRIGger:A:LOGIc:THReshold:RF?
Related Commands
TRIGger:A:LOGIc:INPut:RF, TRIGger:A:LOGIc:FUNCtion, TRIGger:A:
LOGIc:PATtern:WHEn
Arguments
<NR3> is a floating point number that specifies the threshold to use, in the
currently selected RF units (using RF:UNIts). The range is (ref level – 40 dBm) to
(ref level + 10 dBm),
but never less than –65 dBm or more than +30 dBm.
Examples
TRIGger:A:LOGIc:THReshold:RF —1.000E+1 sets the threshold to –10 dBm
(when the selected RF units are dBm).
TRIGger:A:LOGIc:THReshold:RF? might return -30.0000, indicating that the
threshold set to –30.000 dBm (assuming the units are currently set to dBm).
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-887