MDO3000 Programmer Manual.pdf - 第917页

Commands Listed in Alphabetical Order NOTE. MDO3000 m odels only have two digital thr eshold contr ols: one for digital channels D0 - D7, and the other for D8 - D15. Digital channel trigger levels cannot be set independe…

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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
Commands Listed in Alphabetical Order
TRIGger:A:LO
Werthreshold{:AUX|:EXT}
This command specifies the lower threshold for the Aux Input connector.Usedfor
the following trigger types: runt, transition.
Conditions
This command is not available for MDO4000/B series models, or the 4-channel
MDO3000 series models as they have no Aux Input connector. However, the
2-channel
MDO3000 models do have an auxin, so this command is available.
Group
Trigger
Syntax
TRIGger:A:LOWerthreshold{:AUX|:EXT} {<NR3>|ECL|TTL}
TRIGger:A:LOWerthreshold{:AUX|:EXT}?
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:LOWerthreshold:CH<x>
This command specifies the lower threshold for the channel selected. Each
channel can have an independent level. Used in runt and transition triggersasthe
lower threshold. Used for all other trigger types as the single level/threshold.
Group
Trigger
Syntax
TRIGger:A:LOWerthreshold:CH<x> {ECL|TTL|<NR3>}
TRIGger:A: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 clock level, in volts.
Examples
TRIGGER:A:LOWERTHRESHOLD:CH2 50E-3 sets the lower limit threshold for
CH2ofthepulserunttriggerto50mV.
TRIGGER:A:LOWERTHRESHOLD:CH2? might return :T RIGGER:A:
LOWERTHRESHOLD:CH2 1.2000E-01
indicating that the lower limit threshold
for CH2 of the pulse runt trigger is set to 120 mV.
2-888 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual