Mask Testing 16
Keysight InfiniiVision HD3-Series Oscilloscopes User's Guide 231
:MTESt:SCALe:XDELta +1.0000E-09
:MTESt:SCALe:Y1 +2.0E+00
:MTESt:SCALe:Y2 +4.00000E+00
end_setup
In a mask file, all region definitions need to be separated by a blank line.
Mask regions are defined by a number of (x,y) coordinate vertices (as on an
ordinary x,y graph). A "y" value of "MAX" specifies the top of the graticule, and a
"y" value of "MIN" specifies the bottom of the graticule.
The mask x,y graph is related to the oscilloscope graticule using the :MTESt:SCALe
setup commands.
The oscilloscope's graticule has a time reference location (at the left, center, or
right of the screen) and a trigger (t=0) position/delay value relative to the
reference. The graticule also has a vertical ground 0 V reference (offset relative to
the center of the screen) location.
The X1 and Y1 setup commands relate the mask region's x,y graph origin to the
oscilloscope graticule's t=0 and V=0 reference locations, and the XDELta and Y2
setup commands specify the size of the graph's x and y units.
• The X1 setup command specifies the time location of the x,y graph's x origin.
• The Y1 setup command specifies the vertical location of the x,y graph's y origin.
• The XDELta setup command specifies the amount of time associated with each
x unit.
• The Y2 setup command is the vertical location of the x,y graph's y=1 value (so
in effect, Y2 – Y1 is the YDELta value).
For example:
• With a graticule whose trigger position is 10 ns (before a center screen
reference) and whose ground reference (offset) is 2 V below the center of the
screen, to place the mask region's x,y graph's origin at center screen, you would
set X1 = 10 ns and Y1 = 2 V.
• If the XDELta parameter is set to 5 ns and Y2 is set to 4 V, a mask region whose
vertices are (-1, 1), (1, 1), (1, -1), and (-1, -1) goes from 5 ns to 15 ns and from
0 V to 4 V.
• If you move the mask region's x,y graph origin to the t=0 and V=0 location by
setting X1 = 0 and Y1 = 0, the same vertices define a region that goes from
-5 ns to 5 ns and from -2 V to 2 V.
If there are more than 1000 vertices in a mask region, only the first 1000 vertices will be
processed.
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