Agilent Technologies 5000 Series manual MEASurePREShoot

Commands by Subsystem 3

:MEASure:PREShoot

(see page 530)

Command Syntax :MEASure:PREShoot [<source>]

<source> ::= {CHANnel<n> FUNCtion MATH}

<n> ::= {1 2 3 4} for the four channel oscilloscope models <n> ::= {1 2} for the two channel oscilloscope models

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><NL>

<value> ::= the percent of preshoot of the selected waveform in NR3 format

See Also • "Introduction to :MEASure Commands" on page 218

•":MEASure:SOURce" on page 240

•":MEASure:VMIN" on page 250

•":MEASure:VMAX" on page 249

•":MEASure:VTOP" on page 254

•":MEASure:VBASe" on page 248

Agilent InfiniiVision 5000 Series Oscilloscopes Programmer's Reference 235