Filter
Top Products
17-9
Mask Test Commands
SCALe:XDELta
SCALe:XDELta
Command :MTESt:SCALe:XDELta <xdelta_value>
This command defines the position of the X2 marker with respect to the X1 marker. In the
mask test coordinate system, the X1 marker defines where X=0; thus, the X2 marker defines
where X=1. Because all X vertices of regions defined for mask testing are normalized with
respect to X1 and ΔX, redefining ΔX also moves those vertices to stay in the same locations
with respect to X1 and
ΔX. Thus, in many applications, it is best if you define XDELta as a
pulse width or bit period. Then a change in data rate, without corresponding changes in the
waveform, can easily be handled by changing
ΔX. The X-coordinate of region vertices are
normalized using the equation:
X = (X × XDELta) + X1
<xdelta_value> is a time value specifying the distance of the X2 marker with respect to the
X1 marker.
Query :MTESt:SCALe:XDELta?
The query returns the current value of
ΔX.
Returned Format [:MTESt:SCALe:XDELta] <xdelta_value> <NL>
Examples
Assume that the period of the waveform you wish to test is 1
μs. Then the following example
will set
ΔX to 1 μs, ensuring that the waveform’s period is between the X1 and X2 markers.
10 OUTPUT 707;”:MTEST:SCALE:XDELTA 1E-6”
SCALe:Y1
Command :MTESt:SCALe:Y1 <y1_value>
This command defines where Y=0 in the coordinate system for mask testing. All Y values of
vertices in the coordinate system are defined with respect to the boundaries set by SCALe:Y1
and SCALe:Y2, according to the equation:
Y = (Y × (Y2 – Y1)) + Y1
Thus, if you set Y1 to 100 mV, and Y2 to 1 V, a Y value of .100 in a vertex is at 190 mV.
<y1_value> is a voltage value specifying the point at which Y=0.
Query :MTESt:SCALe:Y1?
The query returns the current setting of the Y1 marker.
Returned Format [:MTESt:SCALe:Y1] <y1_value><NL>
Example 10 OUTPUT 707;”:MTEST:SCALE:Y1 -150E-3”
SCALe:Y2
Command :MTESt:SCALe:Y2 <y2_value>
This command defines Y=1 in the coordinate system for mask testing. All Y values of vertices
in the coordinate system are defined with respect to the boundaries defined by SCALe:Y1 and
SCALe:Y2, according to the following equation: