MDO3000 Programmer Manual.pdf - 第784页
Commands Listed in A lphabetical Order E n d—e n dv a l u ei n percent of record Focus — focus value in percent of record X value — horizonta l v alue of the focus point in the mark’ s waveform units Y value — vertical v…
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
Commands Listed in Alphabetical Order
Group
Vertical
Syntax
SELect:{BUS<x>|B<x>} {OFF|ON|0|1}
SELect:{BUS<x>|B<x>}?
Arguments
ON or 1 turns the specified waveform display on.
OFF or 0 turns the specified waveform display off.
SELect:CH<x>
Turns the display of the channel <x> waveform on or off, where <x > is the
channel number, which can be 1–4. This command also resets the acquisition.
The query returns whether the channel is on or off but does not indicate whether
it is the specified waveform.
Group
Vertical
Syntax
SELect:CH<x> {ON|OFF|1| 0}
SELect:CH<x>?
Arguments
ON or 1 turns on the display of the specified waveform. This waveform also
becomes the selected waveform.
OFF or 0 turns off the display of the specified waveform.
Examples
SELECT:CH2 ON turns the channel 2 waveform display on, and selects channel 2.
SELECT:CH1? might return :SELECT:CH1 1 indicating that channel 1 is being
displayed.
SELect:CONTROl
This command selects a waveform to be used with channel-related commands
such as the cursor commands. In addition to selecting the waveform, it turnson
the display of the waveform, if it wasn’t on already.
Group
Vertical
Syntax
SELect:CONTROl {CH1|CH2|CH3|CH4
|MATH|REF1|REF2|REF3|REF4|BUS1|BUS2|BUS3|BUS4|D0|D1|D2|D3|D4
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-755