MDO3000 Programmer Manual.pdf - 第783页

Commands Listed in Alphabetical Order Related Commands TRIGger:A:UPP erthreshold:RF Arguments <NR3> is a floating point number that specifies the threshold for the time domain trace, in degrees. Examples SEARCH:SEARC…

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Commands Listed in Alphabetical Order
SEARCH:SEARC
H<x>:TRIGger:A:UPPerthreshold:RF_FREQuency
For a runt or transition search using the RF Frequency vs. Time
trace, this command specifies the upper threshold to be used by the
search engin
e. (To specify the lower threshold, use the command
SEARCH:SEARCH<x>:TRIGger:A:LOWerthreshold:RF_AMPlitude.)
Conditions
MDO4000/B/C models only.
Group
Search
Syntax
SEARCH:SEARCH<x>:TRIGger:A:UPPerthreshold:RF_FREQuency
{<NR3>}
SEARCH:SEARCH<x>:TRIGger:A:UPPerthreshold:RF_FREQuency?
Related Commands
TRIGger:A:UPPerthreshold:RF
Arguments
<NR3> is a floating point number that specifies the threshold for the time domain
trace, in Hz.
Examples
SEARCH:SEARCH1:TRIGger:A:UPPerthreshold:RF_FREQuency
100.0E+6
sets the upper threshold to 100 MHz.
SEARCH:SEARCH1:TRIGger:A:UPPerthreshold:RF_FREQuency? might
return 100.0E+6, indicating that the upper threshold has been set to 100 MHz.
SEARCH:SEARCH<x>:TRIGger:A:UPPerthreshold:RF_PHASe
This command specifie
s the upper threshold to be used by the search engine when
performing a runt or transition search using the RF Phase vs. Time trace.
(To specify the lowe
r threshold, use the command SEARCH:SEARCH<x>:
TRIGger:A:LOWerthreshold:RF_AMPlitude.)
Conditions
MDO4000/B/C models only.
Group
Search
Syntax
SEARCH:SEARCH<x>:TRIGger:A:UPPerthreshold:RF_PHASe {<NR3>}
SEARCH:SEARCH<x>:TRIGg
er:A:UPPerthreshold:RF_PHASe?
2-752 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Related Commands
TRIGger:A:UPP
erthreshold:RF
Arguments
<NR3> is a floating point number that specifies the threshold for the time domain
trace, in degrees.
Examples
SEARCH:SEARCH1:TRIGger:A:UPPerthreshold:RF_PHASe 15 sets the
upper threshold to 15 degrees.
SEARCH:SEARCH1:TRIGger:A:UPPerthreshold:RF_PHASe? might return
15, indicating that the upper threshold has been set to 15 degrees.
SEARCH:SPECTral:LIST? (Query Only)
This query will return a list of all automatically placed peak markers displayed in
the frequency domain graticule. (To return information about manual markers,
use the
MARKER:M<x> commands.) This query returns entries in the form of an
enumeration value, which is the source waveform, as well as 7 <NR3> values,
which specify the automatic peak marker attributes.
If manual markers are not turned on, this list will also include the Reference
Marker. (To determine which value is the Reference Marker, query using
RF:REFLevel and compare it with the values.) If manual markers are turned on,
this list will not include the Reference Marker (when manual markers are turned
on, the Reference Marker is MARKER:M1).
Conditions
MDO4000/B/C models only.
Group
RF
Syntax
SEARCH:SPECTral:LIST?
Related Commands
MARKER:PEAK:THReshold, MARKER:TYPe, MARKER:PEAK:STATE
MARKER:PEAK:MAXimum
Returns
The query is returned in the form:
( <Enum>,<NR3>,<NR3>,<NR3>,<NR3>,<NR3>,<NR3>,<NR3>) ..
<Enum> is the source waveform.
The 7 NR3 automatic peak marker attributes returned are as follows:
Start — start value in percent of record
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-753
Commands Listed in Alphabetical Order
End—endvaluei
n percent of record
Focus — focus value in percent of record
X value — horizontal value of the focus point in the mark’s waveform units
Y value — vertical value of the focus point in the mark’s waveform units
Delta X value — difference from the Reference Marker.
Delta Y value — difference from the Reference Marker.
If no user t
ime marks have been set, the query returns
NONe,0.0E0,0.0E0,0.0E0,0.0E0,0.0E0,0.0E0,0.0E0.
Examples
SEARCH:SPECTral:LIST? might return
RF_NORMAL,50.2000,50.2000,50.2000,100.0000E+6,3.6624,0.0E+0,0.0E+0;
RF_NORMAL,70.2000,70.20
00,70.2000,200.0000E+6,-45.7444,0.0E+0,0.0E+0;
RF_NORMAL,90.2000,90.2000,90.2000,300.0000E+ 6,-43.6428,0.0E+0,0.0E+0
This indicates that the markers automatically mark three peaks on the RF Normal
trace. Each marker is delineated by a semicolon. The values that follow each
RF_NORMAL record are Start, End, Focus, X value, Y value, Delta X value,
Delta Y value, respectively.
SELect? (Query Only)
Queries which waveforms are displayed.
Group
Vertical
Syntax
SELect?
Examples
SELECT?? might return the following
:SELECT:BUS1 0;BUS2 0;CH1 1;CH2 0;CH3 0;CH4 0;MAT H 0;REF1
0;REF2 0;REF3 0;REF4 0;CONTROL CH1
SELect:{BUS<x>|B<x>}
This command turns on and off the display of the waveform for <x>, where x is
the bus number 1-4, 1-3 for the MDO4000C and 1-2 for the MDO3000. The
query returns whether the channel is on or off but does not indicate whether it is
the specified waveform.
2-754 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual