578 Keysight InfiniiVision 3000T X-Series Oscilloscopes Programmer's Guide
24 :MTESt Commands
:MTESt:SCALe:XDELta
(see page 1276)
Command Syntax
:MTESt:SCALe:XDELta <xdelta_value>
<xdelta_value> ::= X delta value in NR3 format
The :MTESt:SCALe:XDELta 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 the 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 polygon vertices is normalized using this equation:
X = (X * ΔX) + X1
The X delta value is a time value specifying the distance of the X2 marker with
respect to the X1 marker.
For example, if the period of the waveform you wish to test is 1 ms, setting
ΔX to
1 ms ensures that the waveform's period is between the X1 and X2 markers.
Query Syntax
:MTESt:SCALe:XDELta?
The :MTESt:SCALe:XDELta? query returns the current value of ΔX.
Return Format
<xdelta_value><NL>
<xdelta_value> ::= X delta value in NR3 format
See Also • "Introduction to :MTESt Commands" on page 551
• ":MTESt:SCALe:BIND" on page 576
• ":MTESt:SCALe:X1" on page 577
• ":MTESt:SCALe:Y1" on page 579
• ":MTESt:SCALe:Y2" on page 580
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