GW Instek GDS-800 Series User Manual - Manual (Page 30)

GDS-800 Series Digital Storage Oscilloscope Operation Manual
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AUTO: The oscilloscope is in auto mode and trigger conditions are not met.
Figure 5-14: The oscilloscope is in auto mode and trigger conditions are not met
SLOPE/COUPLING: Change trigger slope and select trigger coupling by pressing F5
softkey.
z Slope : Press the F1 softkey to select the triggering slope;
oscilloscope will change the “trigger slope” to the rising or falling edge.
z Coupling DC/AC: Press the F2 softkey to select DC coupling ( ) or AC
coupling ( ).
z Rejection LF/HF/Off: Press F3 softkey to select the frequency reject mode.
z LF: Press the F3 softkey to enable low frequency reject mode. Low frequency
reject mode removes the low frequency portion of the triggering signal. That
allows only the high frequency components to pass on to the triggering system
and start an acquisition afterward. Low frequency rejection attenuates signals
below 50kHz.
z HF: High frequency reject mode does the opposite of low frequency reject mode.
High frequency rejection attenuates signals above 50kHz.