518 Agilent InfiniiVision 3000 X-Series Oscilloscopes Programmer's Guide
22 :MTESt Commands
:MTESt:SCALe:XDELta
(see page 1138)
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 491
• ":MTESt:SCALe:BIND" on page 516
• ":MTESt:SCALe:X1" on page 517
• ":MTESt:SCALe:Y1" on page 519
• ":MTESt:SCALe:Y2" on page 520
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