Technical data

406 Agilent InfiniiVision 2000 X-Series Oscilloscopes Programmer's Guide
21 :MTESt Commands
:MTESt:SCALe:XDELta
(see page 790)
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 379
• ":MTESt:SCALe:BIND" on page 404
• ":MTESt:SCALe:X1" on page 405
• ":MTESt:SCALe:Y1" on page 407
• ":MTESt:SCALe:Y2" on page 408