To Next Page

To Previous Page

606 Keysight InfiniiVision 4000 X-Series Oscilloscopes Programmer's Guide

24 :MEASure Commands

:MEASure:PREShoot

(see page 1610)

Command Syntax

:MEASure:PREShoot [<source>]

<source> ::= {CHANnel<n> | FUNCtion<m> | MATH<m> | WMEMory<r>}

<n> ::= 1 to (# analog channels) in NR1 format

<r> ::= 1 to (# ref waveforms) in NR1 format

The :MEASure:PREShoot command installs a screen measurement and starts a

preshoot measurement. If the optional source parameter is specified, the current

source is modified.

Query Syntax

:MEASure:PREShoot? [<source>]

The :MEASure:PREShoot? query measures and returns the preshoot of the edge

closest to the trigger, displayed on the screen. The method used to determine

preshoot is to make three different vertical value measurements: Vtop, Vbase, and

either Vmin or Vmax, depending on whether the edge is rising or falling.

For a rising edge:

preshoot = ((Vmin-Vbase) / (Vtop-Vbase)) x 100

For a falling edge:

preshoot = ((Vmax-Vtop) / (Vtop-Vbase)) x 100

Vtop and Vbase are taken from the normal histogram of all waveform vertical

values. The extremum of Vmax or Vmin is taken from the waveform interval right

before the chosen edge, halfway back to the previous edge. This more restricted

definition is used instead of the normal one, because it is likely that a signal may

have more overshoot than preshoot, and the normal extremum would then be

dominated by the overshoot of the preceding edge.

Return Format

<value> ::= the percent of preshoot of the selected waveform

in NR3 format

See Also • "Introduction to :MEASure Commands" on page 568

• ":MEASure:SOURce" on page 615

• ":MEASure:VMIN" on page 632

• ":MEASure:VMAX" on page 631

• ":MEASure:VTOP" on page 636

• ":MEASure:VBASe" on page 630

Keysight Technologies InfiniiVision 4000 X Series User Manual

Questions and Answers: