MDO3000 Programmer Manual.pdf - 第779页

Commands Listed in Alphabetical Order Syntax SEARCH:SEARCH <x>:TRIGger:A{:T RANsition|:RISEF all}:WHEn {SLOWer|FASTe r|EQual|UNEQual} SEARCH:SEARCH <x>:TRIGger:A{:T RANsition|:RISEF all}:WHEn? Arguments FASTe…

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Commands Listed in Alphabetical Order
Group
Search
Syntax
SEARCH:SEARCH<x>:TRIGger:A{:TRANsition|:RISEFall}:POLarity
{EITher|NEGative|POSitive}
SEARCH:SEARCH<x>:TRIGger:A{:TRANsition|:RISEFall}:POLarity?
Arguments
POSitive specifies that a pulse edge must traverse from the lower (most
negative) to higher (most positive) level for transition searching to occur.
NEGative specifies that a pulse edge must traverse from the upper (most positive)
to lower (most negative) level for transition searching to occur.
EITher specifies either positive or negative polarity.
SEARCH:SEARCH<x>:TRIGger:A{:TRANsition|:RISEFall}:SOUrce
This command specifies the source for a transition search to determine whereto
place a mark.
SEARCH<x> is the search number, which is always 1.
Group
Search
Syntax
SEARCH:SEARCH<x>:TRIGger:A{:TRANsition|:RISEFall}:SOUrce
{CH1|CH2|CH3|CH4|MATH|REF1|REF2|REF3|REF4|RF_AMPlitude|
RF_FREQuency|RF_PHASe}
SEARCH:SEARCH<x>:TRIGger:A{:TRANsition|:RISEFall}:SOUrce?
Arguments
CH1–CH4 specifies one input channel as the source.
MATH specifies the math waveform as the source.
REF1–REF4 specifies a reference waveform as the source.
RF_AMPlitude|RF_FREQuency|RF_PHASe specify an RF time
domain trace as the source. (MDO4000/B/C models only.) Also requires
installation of an MD
O4TRIG application module.)
SEARCH:SEARCH<x>:TRIGger:A{:TRANsition|:RISEFall}:WHEn
This command specifies the condition for a transition search. SEARCH<x> is
the search number, which is always 1.
Group
Search
2-748 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Syntax
SEARCH:SEARCH
<x>:TRIGger:A{:TRANsition|:RISEFall}:WHEn
{SLOWer|FASTer|EQual|UNEQual}
SEARCH:SEARCH<x>:TRIGger:A{:TRANsition|:RISEFall}:WHEn?
Arguments
FASTer sets the search to occur when the transitioning signal is faster than the set
volts/second rate.
SLOWer sets the search to occur when the transitioning signal is slower than the
set volts/second rate.
EQual sets the search to occur when the transitioning signal is equal to the set
volts/second rate within a ±5% tolerance.
UNEQual sets the search to occur when the transitioning signal is not equal to
the set volts/second rate ±5%.
SEARCH:SEARCH<x>:TRIGger:A:TYPe
This command specifies the search type to determine where to place a mark. The
default search type is
EDGe. SEARCH<x> is the search number, which is always 1.
NOTE. A series o f example command sequences showing differe
nt searches and
triggers is included as an appendix. (See page F-1, Search and Trigger Command
Sequence Examples.)
Group
Search
Syntax
SEARCH:SEARCH<x>:TRIGger:A:TYPe
{EDGe|PULSEWidth|SETHold|RUNt|TRANsition|LOGIc|TIMEOut|BUS
(with t he appropria te application module i
nstalled)}
SEARCH:SEARCH<x>:TRIGger:A:TYPe?
Arguments
EDGe is the default search. An edge search occurs when a signal
passes through a specified voltage level in a specified direction and is
controlled by the SEARCH:SEARCH<x>:TRIGger:A:EDGE:SOUrce and
SEARCH:SEARCH<x>:TRIGger:A:EDGE:SL
Ope commands.
PULSEWIdth searches when a pulse is found that has the specified
polarity, and is either inside or outside the limits as specified by
SEARCH:SEARCH<x>:TRIGger:A:LOGIc:PATtern:WHEn:LESSLimit and
SEARCH:SEARCH<x>:TRIGger:A:LOGIc:PATtern:WHEn:MORELimit.
The polarity is selected using the SEARCH:SEARCH<x>:TRIGger:A:RUNT:
POLarity command.
SETHold specifies a setup and hold search.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-749
Commands Listed in Alphabetical Order
RUNt searches f
or when a pulse crosses the first preset voltage threshold, but does
not cross the second preset threshold before recrossing the first. The thresholds
are set using the SEARCH:SEARCH<x>:TRIGger:A:LOWerthreshold:CH<x>
and SEARCH:SEARCH<x>:TRIGger:A:UPPerthreshold:CH<x> commands.
TRANsition searches for when a pulse crosses both thresholds in the sam
e
direction as the specified polarity and the transition time between the two
threshold crossings is greater or less than the specified time delta.
LOGic specifies that a search occurs when specified conditions are met, and is
controlled by the
SEARCH:A:LOGIc commands.
TIMEout specifies that a search occurs when no pulse is detected in a specified
time.
BUS specifies that a search occurs when a communications signal is found.
SEARCH:SEARCH<x>:TRIGger:A:UPPerthreshold:CH<x>
This command specifies the channel waveform upper threshold to determine
where to place a mark. This setting is applied to all channel searches that uses an
upper threshold.
SEARCH<x> is the search number, which is always 1, and CH<x>
is the channel number, which is 1–4.
Group
Search
Syntax
SEARCH:SEARCH<x>:TRIGger:A:UPPerthreshold:CH<x> {TTL}
SEARCH:SEARCH<x>:TRIGger:A:UPPerthreshold:CH<x>?
Arguments
TTL specifies a preset TTL high level of 1.4 V.
SEARCH:SEARCH<x>:TRIGger:A:UPPerthreshold:MATH
This command specifies the math waveform upper threshold to determine where
to place a mark. This setting is applied to all math waveform searches that uses an
upper threshold. <x> is the search number.
Group
Search
Syntax
SEARCH:SEARCH<x>:TRIGger:A:UPPerthreshold:MATH {TTL}
SEARCH:SEARCH<x>:TRIGger:A:UPPerthreshold:MATH?
Arguments
TTL specifies a preset TTL high level of 1.4 V.
2-750 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual