AEMC OX7102-CII, User Manual

Page: 66 / 208

Oscilloscope Mode - The "Trigger" Menu
IV - 66 SCOPIX Oscilloscopes
Oscilloscope Mode (cont'd)
Count
Selects the edge trigger with counting of events.
The count is triggered by the auxiliary source. The main source serves as a
clock for the count.
Effective triggering occurs after the end of the count on the next event from the
main source.
Trigger delay
3 Adjustment with the stylus using the setting scroll bar to choose the
number of events required.
Double-tapping in this field displays a virtual numeric keypad which can be
used to directly input the value.
Holdoff
232µs Adjustment with the stylus using the setting scroll bar, disabling of
the trigger for a predefined period and, among other things,
stabilization of the trigger on pulse trains.
Double-tapping in this field displays a virtual numeric keypad which can be used
to directly input the value.
Auxiliary source
selects a channel as a trigger source.
Coupling Selection of the filter for the auxiliary trigger source:
AC AC coupling (10 Hz to 200 MHz):
blocks the DC component of the signal
DC DC coupling (0 to 200 MHz):
allows the entire signal through
LF Reject Reject of source signal frequencies < 10 kHz
facilitates observation of signals with a DC component
HF Reject Rejection of source signal frequencies > 10 kHz:
facilitates observation of signals with high-frequency noise
Edge
Selection of the trigger gradient:
+ trigger on ascending edge
- trigger on descending edge
The selected trigger edge is indicated the status area.
Level 1.09V Adjustment of the trigger level with the stylus on the scroll bar.
Noise reject
•
No: hysteresis
≈
0.5 div.
•
Yes: introduces a hysteresis of
≈
1.5 div.