LeCroy WaveRunner Xi-A - Page 42

GETTING STARTED MANUAL
WRXi-A-GSM-E Rev A 41
8. TouchinsidetheCoupling fieldand
selectacouplingtype.
• DC–Allthesignal’sfrequency
componentsarecoupledtothetrigger
circuitforhighfrequencyburstsor
wheretheuseofACcouplingwould
shifttheeffectivetriggerlevel.
• AC–Thesignaliscapacitivelycoupled.
DClevelsarerejected,an
dfrequencies
below50Hzareattenuated.
• LFREJ‐Thesignaliscoupledthrougha
capacitivehigh‐passfilternetwork,DCis
rejectedandsignalfrequenciesbelow
50kHzareattenuated.Forstable
triggeringonmedium‐to‐highfrequency
signals.
• HFREJ‐SignalsareDCcoupledtothe
triggercirc
uitandalow‐passfilter
networkattenuatesfrequenciesabove
50kHz.Thisisusedfortriggeringonlow
frequencies.
9. ChoosePositive,Negative,or
Windowslope.
10. Windowslopesetsathreshold
aboveandbelowthetriggerlevel
beyondwhichthesignalmustpass
togenerateatrigger.Theslopecan
beeitherpositiveornegative.