MDO3000 Programmer Manual.pdf - 第387页

Commands Listed in Alphabetical Order Syntax MARK:TOTal? MARK:USERLIST The command creates a single user mark on a waveform in the time domain. The arguments consis t of an enumeration specifying the sour ce waveform, fo…

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Commands Listed in Alphabetical Order
Group
Mark
Syntax
MARK:SELected:SOURCe?
MARK:SELected:STARt? (Query Only)
Returns the starting point of the selected mark, 0 to 100% of the waveform.
Group
Mark
Syntax
MARK:SELected:STARt?
MARK:SELected:STATE? (Query Only)
Returns the on or off state of the selected mark. The selected mark is at or near
the center of the screen. If you press the front-panel Set/Clear button, this mark
will disappear.
Group
Mark
Syntax
MARK:SELected:STATE?
MARK:SELected:ZOOm:POSition? (Query Only)
Returns the position of the selected mark, 0 to 100% of the zoom overview
window.
Group
Mark
Syntax
MARK:SELected:ZOOm:POSition?
MARK:TOTal? (Query Only)
Returns how many marks are currently in use. There can be a total of 1,024 marks
returned.
Group
Mark
2-356 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
Commands Listed in Alphabetical Order
Syntax
MARK:TOTal?
MARK:USERLIST
The command creates a single user mark on a waveform in the time domain. The
arguments consist of an enumeration specifying the source waveform, followed
by 7 time mark parameters. You can create up to 1,024 marks. To save all the
marks to memory, use the command
MARK:SAVEALL TOUSER.
The query form retrieves a list of all user marks, separated by a semicolon.
To retrieve the list of all system generated marks, use the command
SEARCH:SEARCH<x>:LIST?
A "Settings conflict" error event is set for the command form if any of the
following conditions are true:
The source waveform is not turned on.
The position of the mark is not on the waveform.
The maximum number of marks would be exceeded.
NOTE. The search marks returned from the
MARK:USERLIS T?
query are those
marks saved to the internal user list of marks. The search marks returned by the
SEARCH:SEA RCH:LIST?
query are the automatically generated system marks.
Group
Mark
Syntax
MARK:USERLIST
<Enum>,<NR3>,<NR3>,<NR3>,<NR3>,<NR3>,<NR3>,<NR3>
MARK:USERLIST?
Related Commands
MARK:SAVEALL, SEARCH:SEARCH<x>:LIST?
Arguments
The first argument <Enum> can be any one of the following source waveforms:
CH<x> – analog channels 1–4
B<x> – serial (if installed) or parallel bus 1–4
MATH – math waveform
REF<x> – reference waveforms 1–4
D0 — D15 – digital channels 0 — 15 (MSO/MDO4000/B models only
as well as MDO3000 and MDO400C models with option MDO3MSO or
MDO4MSO installed.)
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-357
Commands Listed in Alphabetical Order
RF_AMPlitude|
RF_FREQuency|RF_PHASe
– RF time domain traces
(MDO4000/B/C models only.)
The next 7 <NR3
> arguments are time mark parameters as follows:
Start – start value in percentage of record
End – end value in percentage of record
Focus – focus value in percentage of record
X value – horizontal value of the focus point in the mark’s waveform units
(This is ignored in the command form – use any value.)
Y value – vertical value of the focus point in the mark’s waveform units (This
is ignored in the command form – use any value.)
Delta X value – always 0, since there is no time-domain reference mark. (This
is ignored in the command form – use any value.)
Delta Y value – always 0, since there is no time-domain reference mark. (This
is ignored in the command form – use any value.)
Returns
If no user time marks have been set, the query returns
NONe,0.0E0,0.0E0,0.0E0,0.0E0,0.0E0,0.0E0,0.0E0.
Examples
MARK:USERLIST
CH1,62.5000,62.5000,62.5000,0E+0,0E+0,0.0E+0,0.0E+0;USERLIST
CH1,79.5000,79.5000,79.5000,0E+0,0E+0,0.0E+0,0.0E+0 sets two
marks on the Channel 1 waveform.
MARK:USERLIST? might return
CH1,62.5000,62.5000,62.5000,5.0000E-6,infE-315,0.0E+0,0.0E+0;USERLIST
CH1,79.5000,79.5000,79.5000,11.8000E-6,infE-315,0.0E+0,0.0E+0, indicating
t
hat two marks were set on the Channel 1 waveform.
MARKER:MANual
This command switches on or off the manual markers a and b that are available
for frequency domain traces.
Two manual markers are available for measuring non-peak areas of interest.The
absolute measurements are in dBm; the relative measurements (relative to the
Reference Marker) are in dBc (dB relative to the carrier).
When the manual markers are turned off, and the peak markers are turned on, the
Reference Marker is placed on the highest amplitude peak. With manual markers
on, the Reference Marker is placed at the a manual marker. The manual markers
use the units specified with the command RF:UNIts.
2-358 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual