MDO3000 Programmer Manual.pdf - 第762页

Commands Listed in A lphabetical Order Arguments TTL specifies a p reset TTL high level of 1.4 V . SEARCH:SEARCH<x>:TRIGger:A:LOWerthreshold:REF<x> This command specifies the refe rence waveform lower thr eshol…

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Commands Listed in Alphabetical Order
SEARCH:SEARCH
1:TRIGger:A:LOGIc:THReshold:RF_PHASe?
might return
4.500E+1, indicating that the search’s threshold is 45 degrees.
Following is a
n example command sequence showing how to generate a single
search mark on the RF_PHASe waveform when the waveform is logic 0 (less
than 45 degrees):
SEARCH:SEARCH1:TRIGger:A:LOGIc:THReshold:RF_PHASe 4.500E+1
SEARCH:SEA
RCH1:TRIGger:A:LOGIc:INPut:RF_PHASe LOW
SEARCH:SEARCH1:STATE 1
SEARCH:SEARCH1:LIST? :SEARCH:SEARCH1:LIST
RF_PHASe,2.4702,2.4702,2.4702,-19.0119E-6,0.0E+0,0.0E+0,
0.0E+0
SEARCH:SEARCH<x>:TRIGger:A:LOWerthreshold:CH<x>
This command specifies the lower threshold of the channel waveform to be
used in a search. This setting is applied to all channel searches that use a lower
threshold.
SEARCH<x> is the search number, which is always 1, and CH<x> is
the channel number, which can be 1–4.
Group
Search
Syntax
SEARCH:SEARCH<x>:TRIGger:A:LOWerthreshold:CH<x> {TTL}
SEARCH:SEARCH<x>:TRIGger:A:LOWerthreshold:CH<x>?
Arguments
TTL specifies a preset TTL high level of 1.4 V.
SEARCH:SEARCH<x>:TRIGger:A:LOWerthreshold:MATH
This command specifies the math waveform lower threshold to determine where
to place a mark. This setting is applied to all math searches that use a lower
threshold.
SEARCH<x> is the search number, which is al
ways 1.
Group
Search
Syntax
SEARCH:SEARCH<x>:TRI
Gger:A:LOWerthreshold:MATH {TTL}
SEARCH:SEARCH<x>:TRIGger:A:LOWerthreshold:MATH?
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-731
Commands Listed in Alphabetical Order
Arguments
TTL specifies a p
reset TTL high level of 1.4 V.
SEARCH:SEARCH<x>:TRIGger:A:LOWerthreshold:REF<x>
This command specifies the reference waveform lower threshold to determine
where to plac
e a mark. This setting is applied to all reference searches that use a
lower threshold.
SEARCH<x> is the search number, which is always 1, and REF<x> is the reference
channel number, which is 1–4.
Group
Search
Syntax
SEARCH:SEARCH<x>:TRIGger:A:LOWerthreshold:REF<x> {TTL}
SEARCH:SEARCH<x>:TRIGger:A:LOWerthreshold:REF<x>?
Arguments
TTL specifies a preset TTL high level of 1.4 V.
SEARCH:SEARCH<x>:TRIGger:A:LOWerthreshold:RF_AMPlitude
This command specifies the threshold for RF Amplitude vs. Time trace searches.
For runt and transition searches, this level is the lower threshold. For other search
types, this is the single threshold.
(To specify the upper threshold for runt and transition searches, use the command
SEARCH:SEARCH<x>:TRIGger:A:UPPerthreshold:RF_AMPlitude.)
Conditions
MDO4000/B/C models only.
Group
Search
Syntax
SEARCH:SEARCH<x>:TRIGger:A:LOWerthreshold:RF_AMPlitude
{<NR3>}
SEARCH:SEARCH<x>:TRIGger:A:LOWerthreshold:RF_AMPlitude?
Related Commands
TRIGger:A:LOWerthreshold:RF
Arguments
<NR3> is a floating point number that specifies the lower threshold for the RF
Amplitude vs. Time trace, in Volts.
2-732 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Examples
SEARCH:SEARCH
1:TRIGger:A:LOWerthreshold:RF_AMPlitude 0.1
sets
the lower threshold to 0.1V.
SEARCH:SEARC
H1:TRIGger:A:LOWerthreshold:RF_AMPlitude?
might
return 1.00E–1, indicating that the lower threshold has been set to 0.1V.
Following i
s an example command sequence showing how to generate a single
search mark on the RF_AMPLitude waveform when the waveform is logic 0
(less than 1.5V):
SEARCH:SEARCH1:TRIGger:A:LOWerthreshold:RF_AMPlitude 1.5
SEARCH:SE
ARCH1:TRIGger:A:LOGIc:INPut:RF_AMPlitude LOW
SEARCH:SEARCH1:STATE 1
SEARCH:SEARCH1:LIST? :SEARCH:SEARCH1:LIST
RF_AMPLITUDE,2.4702,2.4702,2.4702,-19.0119E-6,0.0E+0,0.0E+0,
0.0E+0
SEARCH:SEARCH<x>:TRIGger:A:LOWerthreshold:RF_FREQuency
This command specifies the threshold for RF Frequency vs. Time trace searches.
For runt and transition searches, this level is the lower threshold. For other search
types, this is the single threshold.
(To specify the upper threshold for runt and transition searches, use the command
SEARCH:SEARCH<x>:TRIGger:A:UPPerthreshold:RF_FREQuency.)
Conditions
MDO4000/B/C models only.
Group
Search
Syntax
SEARCH:SEARCH<x>:TRIGger:A:LOWerthreshold:RF_FREQuency
{<NR3>}
SEARCH:SEARCH<x>:TRIGger:A:LOWerthreshold:RF_FREQuency?
Related Commands
TRIGger:A:LOWerthreshold:RF, SEARCH:SEARCH<x>:TRIGger:A:
UPPerthreshold:RF_FREQuency
Arguments
<NR3> is a floating point number that specifies the threshold for the time domain
trace, in Hz.
Examples
SEARCH:SEARCH1:TRIGger:A:LOWerthreshold:RF_FREQuency
100.0E+6
sets the lower threshold to 100 MHz.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-733